Preparation method of polyaluminum chloride and preparation system thereof

Abstract

The application discloses a preparation method of polyaluminum chloride, and is characterized by comprising the following steps: S1, adding aluminum ash and hydrochloric acid solution into an acidification reaction tank, heating and reacting, filtering after the reaction is completed, and passing the filtrate into a polymerization reaction kettle; S2, adding calcium carbonate into the polymerization reaction kettle in batches to carry out polymerization reaction, stopping the reaction after the calcium carbonate is completely dissolved and the PH of the solution is 3-5; S3, adding polyacrylamide and ferric chloride into the polymerization reaction kettle, and precipitating under 1-3 pa low pressure to obtain sludge and upper liquid, concentrating and crystallizing the upper liquid, crushing the crystal, and obtaining polyaluminum chloride. The application increases an automatic blocking mechanism below a crystallization and crushing tank, automatically blocks when the sub-packaging cylinder is filled with crystals, achieves the purpose of quantitative sub-packaging, and does not cause too much or too little crystals in the sub-packaging cylinder, and does not require staff to be always beside the machine.

Description

Technical Field

[0001] This invention relates to the field of polyaluminum chloride preparation technology, and in particular to a method and system for preparing polyaluminum chloride. Background Technology

[0002] Aluminum ash is one of the main wastes generated during the aluminum smelting process. Producing one ton of primary aluminum / aluminum product generates 180-290 kg of aluminum ash slag, resulting in millions of tons of emissions annually. Aluminum ash is listed as a hazardous waste due to its content of nitrogen compounds, fluorine, and chlorine.

[0003] In recent years, Chinese aluminum industry operators have conducted extensive research on the efficient and high-value utilization of aluminum ash. For example, publication number CN110040756A (A method for preparing polyaluminum chloride and co-producing refractory materials from aluminum ash) uses waste aluminum ash and hydrochloric acid as raw materials. First, the aluminum ash is screened to recover elemental aluminum. Then, the undersize material is pre-purified. The pre-purified aluminum ash is then mixed with hydrochloric acid for leaching reaction. After solid-liquid separation and washing, filtrate and filter cake are obtained. The filter cake is dried, mixed, shaped, dried and sintered to prepare refractory materials. The filtrate is polymerized and controlled to prepare polyaluminum chloride water purification agent.

[0004] In the preparation of polyaluminum chloride, the crude crystals need to be crushed and then packaged. In the existing technology, the crystals are crushed first by crusher and then a certain amount of crystals are put into containers for packaging by manual weighing. This processing method has the problem of low efficiency, which consumes a lot of labor and time costs, and there is also a risk of contamination during the transfer of crystals. Summary of the Invention

[0005] To address the problems mentioned in the background section, the present invention provides a spray device for desulfurizing electrolytic aluminum flue gas.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A method for preparing polyaluminum chloride includes the following steps:

[0008] S1. Add aluminum ash and hydrochloric acid solution to acidification reaction tank 9, heat to react, filter after the reaction is completed, and pass the filtrate into polymerization reactor.

[0009] S2. Add calcium carbonate to the polymerization reactor 9 in batches to carry out the polymerization reaction. Stop the reaction when all the calcium carbonate has dissolved and the pH of the solution is 3-5.

[0010] S3. Add polyacrylamide and ferric chloride to the polymerization reactor, and precipitate under low pressure of 1-3 Pa to obtain sludge and supernatant. Concentrate and crystallize the supernatant to obtain polyaluminum chloride.

[0011] Preferably, in step S1, the concentration of the hydrochloric acid solution is 10-20%, the aluminum content in the aluminum ash is 30-50%, the weight ratio of aluminum ash to hydrochloric acid solution is 1:(5-15), and the heating reaction conditions are 50-70℃ for 1-3 hours.

[0012] In step S2, the polymerization reaction temperature is 70-90℃;

[0013] In step S3, 0.03-0.05 mol / L polyacrylamide and 0.01-0.03 mol / L ferric chloride are added to each liter of liquid in the polymerization reactor.

[0014] A polyaluminum chloride preparation system includes an acidification reaction tank, a polymerization reactor, and a crystallization crushing tank. The crystallization crushing tank has a crystallization inlet at the top and a crystallization outlet at the bottom. The crystallization crushing tank has a crushing mechanism inside and a support base at the bottom. A lifting support plate is movably installed at the top of the support base. An elastic telescopic rod is detachably installed between the support base and the lifting support plate. An automatic sealing mechanism is provided below the crystallization inlet.

[0015] The automatic sealing mechanism includes a gear ring and a first horizontal rotating shaft. The gear ring is rotatably mounted outside the crystal discharge port. The side edges and bottom of the gear ring are provided with meshing teeth. One end of the first horizontal rotating shaft is rotatably connected to the outer wall of the crystal discharge port. The other end of the first horizontal rotating shaft is fixed with a first spur gear. The first spur gear meshes with the meshing teeth at the bottom of the gear ring. A horizontal guide rod is provided below the first horizontal rotating shaft. A slider is movably mounted on the horizontal guide rod. A fan-shaped sealing plate is fixed at the bottom of the slider. A limit rod is fixed at the top of the slider. A helical guide groove is fixed on the outside of the first horizontal rotating shaft. The top of the limit rod extends into the helical guide groove. Multiple fan-shaped sealing plates are provided, and the multiple fan-shaped sealing plates form a circle. A linkage mechanism is provided between the lifting support plate and the gear ring.

[0016] Preferably, the linkage mechanism includes a horizontal slide rail, which is fixed to the outside of the crystallization crushing tank. A first rack is slidably mounted on the horizontal slide rail. The top end and the side near the toothed ring of the first rack are provided with meshing teeth. The side of the first rack meshes with the toothed ring. A second horizontal rotating shaft is also mounted on the horizontal slide rail through a first bracket. A second spur gear and a third spur gear are fixed at both ends of the second horizontal rotating shaft, respectively. The second spur gear meshes with the top end of the first rack.

[0017] Preferably, a vertically arranged second rack is installed on one side of the lifting support plate, and the second rack meshes with a third spur gear.

[0018] Preferably, a calibration mechanism is provided between the second rack and the lifting support plate. The calibration mechanism includes a mounting component, the top of which has a groove, the bottom of which extends movably into the groove, and a locking mechanism is installed on the mounting component.

[0019] Preferably, the locking mechanism includes a second bracket, on which a threaded rod is mounted. A friction block is rotatably mounted at one end of the threaded rod near the second rack, and a knob is fixed at the other end of the threaded rod.

[0020] Preferably, the crushing mechanism includes a first vertical rotating shaft, a pressing frustum fixed to the top of the first vertical rotating shaft, the first vertical rotating shaft being connected to the bottom of the pressing frustum at an off-center position, and a first bevel gear fixed to the bottom of the first vertical rotating shaft.

[0021] Preferably, a rotary motor is fixed to the outside of the crystallization crushing tank. The output shaft of the rotary motor extends into the inside of the crystallization crushing tank and is fixed with a second bevel gear. A second vertical shaft is also rotatably installed inside the crystallization crushing tank. A scraper is fixed to the outside of the second vertical shaft. The bottom end of the second vertical shaft extends into the crystallization outlet and is provided with a clearing branch on the outside. A third bevel gear is fixed to the top end of the second vertical shaft. The third bevel gear meshes with the second bevel gear from the bottom end and the top end, respectively, with the first bevel gear meshing with the second bevel gear from the bottom end and the top end, respectively.

[0022] Preferably, the bottom end of the lifting support plate is provided with multiple vertical guide rods, and the top end of the support base is provided with multiple guide sleeves corresponding to the vertical guide rods.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. By adding an automatic sealing mechanism below the crystallization crushing tank, a dispensing cylinder for receiving crystals is placed at the top of the lifting support plate. As the amount of crystals inside the dispensing cylinder increases, the weight above the lifting support plate gradually increases, thereby compressing the elastic telescopic rod. As the amount of crystals increases, the lifting support plate gradually moves downward. The downward movement of the lifting support plate is transmitted through the linkage mechanism to drive the gear ring to rotate, which in turn drives the automatic sealing mechanism to gradually close. When the dispensing cylinder is full of crystals, the automatic sealing mechanism is completely closed. At this time, the crystals inside the crystallization crushing tank will not continue to flow out, achieving the purpose of automatic sealing and quantitative dispensing. There will be no excessive or insufficient crystals in the dispensing cylinder, and no staff need to stay by the machine all the time.

[0025] 2. Through the design of the linkage mechanism, when the lifting support plate moves up and down, it can drive the second rack to move up and down. In this way, the second rack meshes with the third spur gear, which drives the second spur gear to rotate. Then, the second spur gear meshes with the first rack, which drives the first rack to move horizontally. When the first rack moves horizontally, it will drive the gear ring to rotate through meshing, thereby achieving the effect of driving the automatic sealing mechanism to open and close.

[0026] 3. By replacing the elastic telescopic rod with different elastic coefficients, it can be used with dispensing cylinders of different volumes to measure crystals of different weights. After the elastic telescopic rod is installed, the linkage mechanism needs to be calibrated. The specific calibration method is as follows: place the empty dispensing cylinder on the top of the lifting support plate, keep the height of the lifting support plate unchanged, push the second rack so that the second rack is in the lowest position (at this time the automatic sealing mechanism is fully open), and then rotate the threaded rod by the knob, so that the friction block can be driven to make close contact with the second rack, thereby completing the fixation of the second rack and achieving the purpose of quick and convenient calibration.

[0027] 4. Through the meshing of the third bevel gear, the first bevel gear, and the second bevel gear, the rotary motor can simultaneously drive the first vertical shaft and the second vertical shaft to rotate, thereby causing the extrusion frustum to rotate eccentrically. This continuously changes the distance between the outer wall of the extrusion frustum and the inner wall of the crystallization crushing tank, thus crushing the coarse crystals. When the second vertical shaft rotates, it can drive the unblocking branch to unblock the crystal discharge outlet, accelerating the crystal discharge. At the same time, it can drive the scraper to clean and scrape the inner wall of the crystallization crushing tank, preventing the crystals from sticking to the inner wall of the crystallization crushing tank and making them difficult to clean. Attached Figure Description

[0028] Figure 1 This is a first-view perspective perspective view of the crystallization crushing tank of the present invention;

[0029] Figure 2 This is a schematic diagram of the internal structure of the crystallization crushing tank of the present invention;

[0030] Figure 3 This is an enlarged detail view of the lower half of the crystallization crushing tank and the position of the lifting support plate of the present invention;

[0031] Figure 4 This is a schematic diagram showing the connection between the mounting component and the second rack of the present invention;

[0032] Figure 5 for Figure 4 Enlarged detail image of position A in the middle;

[0033] Figure 6 This is a second-view perspective perspective view of the crystallization crushing tank of the present invention;

[0034] Figure 7 for Figure 6 Enlarged detail image of position B in the middle;

[0035] Figure 8 This is an enlarged detail view of the automatic sealing mechanism of the present invention;

[0036] Figure 9This is a bottom view of the automatic sealing mechanism of the present invention in its closed state;

[0037] Figure 10 This is a bottom view of the automatic sealing mechanism of the present invention in the open state;

[0038] Figure 11 This is a flowchart of the present invention;

[0039] In the diagram: 1. Crystallization crushing tank; 101. Crystallization inlet; 102. Crystallization outlet; 2. First vertical rotating shaft; 201. First bevel gear; 202. Extrusion frustum; 3. Second vertical rotating shaft; 301. Scraper; 302. Unblocking branch; 303. Third bevel gear; 4. Rotary motor; 401. Second bevel gear; 5. Support base; 501. Lifting support plate; 502. Elastic telescopic rod; 503. Vertical guide rod; 504. Guide sleeve; 505. Dispensing cylinder; 6. Installation parts; 60. 1. Second rack, 602. Second bracket, 603. Threaded rod, 604. Friction block, 605. Knob, 7. Gear ring, 701. First horizontal rotating shaft, 702. Horizontal guide rod, 703. Slider, 704. Fan-shaped sealing plate, 705. Limiting rod, 706. First spur gear, 707. Helical guide groove, 8. Horizontal slide rail, 801. First rack, 802. Second horizontal rotating shaft, 803. Second spur gear, 804. Third spur gear, 9. Acidification reaction tank, 10. Polymerization reactor. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1

[0042] A method for preparing polyaluminum chloride includes the following steps:

[0043] S1. Add aluminum ash and hydrochloric acid solution to acidification reaction tank 9, heat to react, filter after the reaction is completed, and pass the filtrate into polymerization reactor.

[0044] S2. Add calcium carbonate to the polymerization reactor 10 in batches to carry out the polymerization reaction. Stop the reaction when all the calcium carbonate has dissolved and the pH of the solution is 3-5.

[0045] S3. Add polyacrylamide and ferric chloride to the polymerization reactor, precipitate under low pressure of 2 Pa to obtain sludge and supernatant, concentrate and crystallize the supernatant to obtain polyaluminum chloride.

[0046] In step S1, the concentration of the hydrochloric acid solution is 15%, the aluminum content in the aluminum ash is 40%, the weight ratio of aluminum ash to hydrochloric acid solution is 1:10, and the heating reaction conditions are 60℃ for 2 hours.

[0047] In step S2, the polymerization reaction temperature is 80℃;

[0048] In step S3, 0.04 mol / L polyacrylamide and 0.02 mol / L ferric chloride are added to each liter of liquid in the polymerization reactor.

[0049] The resulting product contained 32.5% polyaluminum chloride and had a basicity of 84%.

[0050] Example 2

[0051] The difference between this embodiment and Embodiment 1 is that:

[0052] In step S1, the concentration of the hydrochloric acid solution is 10%, the aluminum content in the aluminum ash is 30%, the weight ratio of aluminum ash to hydrochloric acid solution is 1:5, and the heating reaction conditions are 50°C and 1 hour.

[0053] In step S2, the polymerization reaction temperature is 70℃;

[0054] In step S3, 0.03 mol / L polyacrylamide and 0.01 mol ferric chloride are added to each liter of liquid in the polymerization reactor.

[0055] The rest is exactly the same as in Example 1.

[0056] The resulting product contained 30.1% polyaluminum chloride and had a basicity of 79%.

[0057] Example 3

[0058] The difference between this embodiment and Embodiment 1 is that:

[0059] In step S1, the concentration of the hydrochloric acid solution is 30%, the aluminum content in the aluminum ash is 50%, the weight ratio of aluminum ash to hydrochloric acid solution is 1:15, and the heating reaction conditions are 70°C for 3 hours.

[0060] In step S2, the polymerization reaction temperature is 90℃;

[0061] In step S3, 0.05 mol / L polyacrylamide and 0.03 mol / L ferric chloride are added to each liter of liquid in the polymerization reactor.

[0062] The rest is exactly the same as in Example 1.

[0063] The resulting product contained 31.3% polyaluminum chloride and had a basicity of 81%.

[0064] Example 4

[0065] Reference Figure 1-11 A polyaluminum chloride preparation system includes an acidification reaction tank 9, a polymerization reaction vessel 10, and a crystallization crushing tank 1. The top of the crystallization crushing tank 1 is provided with a crystallization inlet 101, and the bottom of the crystallization crushing tank 1 is provided with a crystallization outlet 102. The crystallization crushing tank 1 is provided with a crushing mechanism inside. The crystallization crushing tank 1 is provided with a support base 5 below. The top of the support base 5 is movably mounted with a lifting support plate 501. An elastic telescopic rod 502 is detachably installed between the support base 5 and the lifting support plate 501. The bottom of the lifting support plate 501 is provided with multiple vertical guide rods 503. The top of the support base 5 is provided with multiple guide sleeves 504 corresponding one-to-one with the vertical guide rods 503. An automatic sealing mechanism is provided below the crystallization inlet 101.

[0066] The crude crystals obtained from the reaction are fed into the crystallization crushing tank 1 through the crystallization inlet 101. After being crushed by the crushing mechanism, they are discharged through the crystallization outlet 102. An automatic sealing mechanism is used to seal the crystallization inlet 101.

[0067] The automatic sealing mechanism includes a gear ring 7 and a first horizontal rotating shaft 701. The gear ring 7 is rotatably mounted on the outside of the crystal discharge outlet 102. The side edges and bottom of the gear ring 7 are provided with meshing teeth. One end of the first horizontal rotating shaft 701 is rotatably connected to the outer wall of the crystal discharge outlet 102, and the other end of the first horizontal rotating shaft 701 is fixed with a first spur gear 706. The first spur gear 706 meshes with the meshing teeth at the bottom of the gear ring 7. A horizontal guide rod 7 is provided below the first horizontal rotating shaft 701. 02. A slider 703 is movably mounted on the horizontal guide rod 702. A fan-shaped sealing plate 704 is fixed at the bottom end of the slider 703. A limit rod 705 is fixed at the top end of the slider 703. A helical guide groove 707 is fixed on the outside of the first horizontal rotating shaft 701. The top end of the limit rod 705 extends into the helical guide groove 707. Multiple fan-shaped sealing plates 704 are provided, and multiple fan-shaped sealing plates 704 form a circle. A linkage mechanism is provided between the lifting support plate 501 and the toothed ring 7.

[0068] A dispensing cylinder 505 for receiving crystals is placed at the top of the lifting support plate 501. As the amount of crystals inside the dispensing cylinder 505 increases, the weight on the lifting support plate 501 gradually increases, thereby compressing the elastic telescopic rod 502. As the amount of crystals increases, the lifting support plate 501 gradually moves downward. The downward movement of the lifting support plate 501 is transmitted through a linkage mechanism to drive the toothed ring 7 to rotate. When the dispensing cylinder 505 is empty, the automatic sealing mechanism is in the fully open state (e.g., ...). Figure 10As the lifting support plate 501 moves downward, it gradually drives the gear ring 7 to rotate clockwise (from a top-down view). Since the gear ring 7 meshes with the first spur gear 706, it can drive the first horizontal rotating shaft 701 to rotate. Because the top of the limiting rod 705 is located in the helical guide groove 707, the slider 703 will move along the horizontal guide rod 702 with the rotation of the first horizontal rotating shaft 701, thereby driving the sector-shaped sealing plate 704 to move horizontally. As the weight of the dispensing cylinder 505 increases, the multiple sector-shaped sealing plates 704 gradually move closer together. When the dispensing cylinder 505 is full of crystals, the multiple sector-shaped sealing plates 704 are completely combined to form a circle, and the automatic sealing mechanism closes (as shown in the image). Figure 9 (State) At this time, the crystals inside the crystallization crushing tank 1 will not continue to flow out, achieving the purpose of automatic sealing and quantitative dispensing. There will be no excessive or insufficient crystals in the dispensing cylinder 505, and no staff need to stay by the machine all the time.

[0069] Example 5

[0070] Reference Figure 1-11 The difference between this embodiment and embodiment 4 is that the linkage mechanism includes a horizontal slide rail 8, which is fixed to the outside of the crystallization crushing tank 1. A first rack 801 is slidably mounted on the horizontal slide rail 8. The top end of the first rack 801 and the side near the toothed ring 7 are provided with meshing teeth. The side of the first rack 801 meshes with the toothed ring 7. A second horizontal rotating shaft 802 is also mounted on the horizontal slide rail 8 through a first bracket. A second spur gear 803 and a third spur gear 804 are fixed at both ends of the second horizontal rotating shaft 802, respectively. The second spur gear 803 meshes with the top end of the first rack 801.

[0071] Among them, a vertically arranged second rack 601 is installed on one side of the lifting support plate 501, and the second rack 601 meshes with the third spur gear 804;

[0072] When the lifting support plate 501 moves up and down, it can drive the second rack 601 to move up and down. This causes the second rack 601 to mesh with the third spur gear 804, which in turn drives the second spur gear 803 to rotate. The second spur gear 803 then meshes with the first rack 801, which in turn drives the first rack 801 to move horizontally. When the first rack 801 moves horizontally, it will mesh with the gear ring 7 to rotate, thereby achieving the effect of opening and closing the automatic sealing mechanism.

[0073] Example 6

[0074] Reference Figure 1-11 The difference between this embodiment and embodiment 4 is that a calibration mechanism is provided between the second rack 601 and the lifting support plate 501. The calibration mechanism includes a mounting part 6, the top of the mounting part 6 is provided with a sliding groove, the bottom end of the second rack 601 extends movably into the sliding groove, and a locking mechanism is installed on the mounting part 6.

[0075] The locking mechanism includes a second bracket 602, on which a threaded rod 603 is mounted. A friction block 604 is rotatably mounted at one end of the threaded rod 603 near the second rack 601, and a knob 605 is fixed at the other end of the threaded rod 603.

[0076] By replacing the elastic telescopic rod 502 with different elastic coefficients, it can be used with dispensing cylinders 505 of different volumes to measure crystals of different weights. After the elastic telescopic rod 502 is installed, the linkage mechanism needs to be calibrated. The specific calibration method is as follows: place the empty dispensing cylinder 505 on the top of the lifting support plate 501, keep the height of the lifting support plate 501 unchanged, push the second rack 601 so that the second rack 601 is in the lowest state (at this time, the automatic sealing mechanism is in the fully open state), and then rotate the threaded rod 603 by the knob 605, so that the friction block 604 can be driven to make close contact with the second rack 601, thereby completing the fixation of the second rack 601 and achieving the purpose of quick and convenient calibration.

[0077] Example 7

[0078] Reference Figure 1-11 The difference between this embodiment and embodiment 4 is that the crushing mechanism includes a first vertical rotating shaft 2, a pressing frustum 202 is fixed at the top of the first vertical rotating shaft 2, the first vertical rotating shaft 2 is connected to the bottom of the pressing frustum 202 at an off-center position, and a first bevel gear 201 is fixed at the bottom of the first vertical rotating shaft 2.

[0079] The crystallization crushing tank 1 is equipped with a rotary motor 4 on its exterior. The output shaft of the rotary motor 4 extends into the interior of the crystallization crushing tank 1 and is equipped with a second bevel gear 401. A second vertical shaft 3 is also rotatably mounted inside the crystallization crushing tank 1. A scraper 301 is fixed on the outside of the second vertical shaft 3. The bottom end of the second vertical shaft 3 extends into the crystallization outlet 102 and is provided with a clearing branch 302 on its exterior. A third bevel gear 303 is fixed on the top end of the second vertical shaft 3. The third bevel gear 303 meshes with the second bevel gear 401 from the bottom end and the top end, respectively, with the first bevel gear 201 meshing with the second bevel gear 401 from the bottom end and the top end, respectively.

[0080] Through the meshing of the third bevel gear 303, the first bevel gear 201, and the second bevel gear 401, the rotary motor 4 can simultaneously drive the first vertical rotating shaft 2 and the second vertical rotating shaft 3 to rotate, thereby driving the extrusion frustum 202 to rotate eccentrically. This continuously changes the distance between the outer wall of the extrusion frustum 202 and the inner wall of the crystallization crushing tank 1, thus crushing the coarse crystals. When the second vertical rotating shaft 3 rotates, it can drive the unblocking branch 302 to unblock the crystal discharge outlet 102, accelerating the discharge of crystals. At the same time, it can drive the scraper 301 to clean and scrape the inner wall of the crystallization crushing tank 1, preventing crystals from sticking to the inner wall of the crystallization crushing tank 1 and making them difficult to clean.

[0081] In the description of this invention, 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," "axial," "radial," and "circumferential" 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 invention 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 invention.

[0082] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0083] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0084] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A polyaluminum chloride preparation system comprising a crystallization breaking tank (1), an acidification reaction tank (9), and a polymerization reaction kettle (10), characterized in that: The top end of the crystallization breaking tank (1) is provided with a crystallization feeding port (101), the bottom end of the crystallization breaking tank (1) is provided with a crystallization discharging port (102), the inside of the crystallization breaking tank (1) is provided with a breaking mechanism, the lower side of the crystallization breaking tank (1) is provided with a supporting base (5), the top end of the supporting base (5) is movably installed with a lifting supporting plate (501), the supporting base (5) and the lifting supporting plate (501) are detachably installed with elastic telescopic rods (502), and the lower side of the crystallization feeding port (101) is provided with an automatic blocking mechanism. The automatic blocking mechanism comprises a gear ring (7) and a first horizontal rotating shaft (701), the gear ring (7) is rotatably installed outside the crystallization discharging port (102), the side edge and the bottom end of the gear ring (7) are provided with meshing teeth, one end of the first horizontal rotating shaft (701) is rotatably connected with the outer wall of the crystallization discharging port (102), the other end of the first horizontal rotating shaft (701) is fixedly provided with a first spur gear (706), the first spur gear (706) is meshed with the bottom end meshing teeth of the gear ring (7), the lower side of the first horizontal rotating shaft (701) is provided with a horizontal guide rod (702), the horizontal guide rod (702) is movably installed with a sliding block (703), the bottom end of the sliding block (703) is fixedly provided with a fan-shaped blocking plate (704), the top end of the sliding block (703) is fixedly provided with a limiting rod (705), the outer side of the first horizontal rotating shaft (701) is fixedly provided with a screw guide groove (707), the top end of the limiting rod (705) extends into the screw guide groove (707), the fan-shaped blocking plate (704) is provided with a plurality of fan-shaped blocking plates (704), and the plurality of fan-shaped blocking plates (704) form a circle, and the lifting supporting plate (501) and the gear ring (7) are provided with a linkage mechanism. The linkage mechanism comprises a horizontal sliding rail (8), the horizontal sliding rail (8) is fixed outside the crystallization breaking tank (1), the horizontal sliding rail (8) is slidably installed with a first rack (801), the top end and the side close to the gear ring (7) of the first rack (801) are provided with meshing teeth, the side of the first rack (801) is meshed with the gear ring (7), and the horizontal sliding rail (8) is further installed with a second horizontal rotating shaft (802) through a first support, both ends of the second horizontal rotating shaft (802) are fixedly provided with a second spur gear (803) and a third spur gear (804), and the second spur gear (803) is meshed with the top end of the first rack (801). The side of the lifting supporting plate (501) is installed with a vertically arranged second rack (601), and the second rack (601) is meshed with the third spur gear (804). The second rack (601) and the lifting supporting plate (501) are provided with a calibration mechanism, and the calibration mechanism comprises a mounting piece (6), the top end of the mounting piece (6) is provided with a sliding groove, the bottom end of the second rack (601) movably extends into the sliding groove, and the mounting piece (6) is installed with a locking mechanism. The locking mechanism comprises a second support (602), a threaded rod (603) is installed on the second support (602), a friction block (604) is rotatably installed on one end of the threaded rod (603) close to the second rack (601), and a knob (605) is fixed to the other end of the threaded rod (603).

2. The polyaluminum chloride preparation system according to claim 1, characterized in that: The crushing mechanism comprises a first vertical rotating shaft (2), a pressing circular cone (202) is fixed to the top end of the first vertical rotating shaft (2), the first vertical rotating shaft (2) is connected to the bottom end of the pressing circular cone (202) in a position deviated from the center, and a first bevel gear (201) is fixed to the bottom end of the first vertical rotating shaft (2).

3. The polyaluminum chloride preparation system according to claim 2, characterized in that: The crystallization crushing tank (1) is externally fixed with a rotating motor (4), the output shaft of the rotating motor (4) extends into the interior of the crystallization crushing tank (1) and is fixed with a second bevel gear (401), a second vertical rotating shaft (3) is rotatably installed in the interior of the crystallization crushing tank (1), a scraper (301) is fixed to the outer side of the second vertical rotating shaft (3), the bottom end of the second vertical rotating shaft (3) extends into the crystallization discharge port (102) and is externally provided with a dredging branch (302), a third bevel gear (303) is fixed to the top end of the second vertical rotating shaft (3), and the first bevel gear (201) and the third bevel gear (303) are respectively meshed with the second bevel gear (401) from the bottom end and the top end.

4. The polyaluminum chloride preparation system according to claim 1, characterized in that: The bottom end of the lifting support plate (501) is provided with a plurality of vertical guide rods (503), and the top end of the support seat (5) is provided with a plurality of guide sleeves (504) corresponding to the vertical guide rods (503) one by one.

Images