Recovery device and method for waste residue based on polyaluminum chloride processing

Abstract

The application discloses a waste residue recovery device and method based on polyaluminum chloride processing, relates to the technical field of polyaluminum chloride processing waste residue treatment, and specifically comprises a crushing storage tank and a tank cover. The tank cover is rotationally connected to the top of the crushing storage tank. A storage hopper is installed at the top of the crushing storage tank. A corrosion-resistant inner sleeve is movably connected to the inner wall of the bottom of the crushing storage tank. The application is characterized by mechanical structure innovation, adoption of a centrifugal extrusion mechanism, trajectory control, and optimization design of corrosion-resistant materials. The application realizes efficient dewatering, crushing and solid-liquid separation integrated treatment of PAC waste residue. The design avoids the complicated process of step-by-step crushing and dewatering of traditional equipment, shortens the treatment cycle, solves the equipment wear and pollution risk in a strong acid environment in a closed system, further guarantees the safety of the operation environment, meets the environmental protection requirements, and provides reliable technical support for chemical waste residue resource utilization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polyaluminum chloride processing waste residue treatment, in particular to a waste residue recycling device and method based on polyaluminum chloride processing. BACKGROUND

[0002] Polyaluminum chloride (PAC) is a highly efficient inorganic polymer flocculant widely used in water treatment, but the large amount of waste residue produced during its production poses a serious environmental challenge. These residues are usually sticky and gel-like, weakly acidic and high in water content, and contain unreacted aluminum salts, residual hydrochloric acid and heavy metal ions. According to actual production data, about 0.15-0.3 tons of waste residue are produced for every ton of liquid PAC, and the amount of waste residue produced by solid PAC products is even higher, reaching 0.25-0.4 tons. If these waste residues are directly stacked or landfilled, the acidic substances and heavy metal ions in them will leach into the soil and water with rainwater, causing persistent environmental pollution and disrupting the balance of the ecosystem.

[0003] Traditional treatment methods face multiple technical bottlenecks. First, the strong corrosiveness of the waste residue causes serious damage to traditional treatment equipment, significantly increasing maintenance costs. Second, the high chloride ion content in the waste residue is difficult to remove at low temperatures, and high-temperature treatment faces the problem of excessive energy consumption. Third, the waste residue is commonly clumped, resulting in low solid-liquid separation efficiency, with the moisture content of the filter cake after pressure filtration still as high as 35-45%, which not only increases the treatment cost but also restricts the resource utilization approach.

[0004] For example, Chinese Patent No. CN215543643U uses a combination of staged crushing and spray cleaning. After the material is crushed by the double-roller in the crushing box, it enters the spiral conveying area through the through holes in the annular plate, and the tank wall nozzles spray water mist to clean the surface of the material, achieving simultaneous crushing and cleaning. However, the solid and liquid are not separated, and the waste water and waste residue are mixed and discharged after cleaning. The waste residue may contain impurities carried by the water, limiting the purity of the recovered material, and additional solid-liquid separation equipment is needed, increasing the complexity of the process. Therefore, a waste residue recycling device and method based on polyaluminum chloride processing is proposed. SUMMARY

[0005] The present application aims to provide a waste residue recycling device and method based on polyaluminum chloride processing to solve the problems mentioned in the background.

[0006] In order to achieve the above object, the present application provides the following technical scheme: the waste residue recovery device based on polyaluminum chloride processing, including broken storage tank and tank cover, the top of the broken storage tank is rotatably connected with the tank cover, the top of the broken storage tank is provided with a storage hopper, the inner wall of the bottom of the broken storage tank is movably connected with a corrosion-resistant inner sleeve, and the top of the corrosion-resistant inner sleeve is movably connected with the bottom of the storage hopper, a discharge port is formed in the corrosion-resistant inner sleeve, a extrusion centrifugal mechanism is fixedly arranged on the outer wall of the corrosion-resistant inner sleeve, and a brick lining is mounted on the inner wall of the broken storage tank outside the extrusion centrifugal mechanism.

[0007] The extrusion centrifugal mechanism comprises a rotating cylinder, an upper pressing plate and a lower pressing plate, the rotating cylinder is fixedly arranged on the side of the discharge port of the corrosion-resistant inner sleeve, the inner wall of the cavity of the rotating cylinder is symmetrically provided with a discharge slot, and the inner wall of the cavity of the rotating cylinder is movably connected with the upper pressing plate and the lower pressing plate.

[0008] The bottom of the rotating cylinder is provided with a sliding sleeve, one side of the sliding sleeve penetrates the rotating cylinder and is fixed with the lower pressing plate, the sliding sleeve is movably connected with a sliding column, one end of the sliding column penetrates the sliding sleeve and is fixed with the upper pressing plate, a limiting sleeve two is fixedly arranged on the inner wall of the corrosion-resistant inner sleeve, and the bottom of the limiting sleeve two is movably connected with a limiting sleeve one.

[0009] Further, arc-shaped grooves are formed in the outer walls of the limiting sleeve one and the limiting sleeve two, the side wall fixed rod of the sliding column abuts against the arc-shaped groove of the side wall of the limiting sleeve one, and the side wall fixed rod of the sliding sleeve abuts against the arc-shaped groove of the side wall of the limiting sleeve two.

[0010] Further, a rotating sleeve one and a rotating sleeve two are mounted on the bottom of the broken storage tank, the axis of the rotating sleeve two penetrates the bottom of the broken storage tank and is connected with the inner wall of the limiting sleeve one through a gear and a thread, the axis of the rotating sleeve one penetrates the rotating sleeve two and is fixed with the corrosion-resistant inner sleeve, a transmission assembly one and a transmission assembly two are mounted on the outer walls of the broken storage tank, and the motors of the transmission assembly one and the transmission assembly two are connected with the rotating sleeve one and the rotating sleeve two through a belt.

[0011] Further, a telescopic assembly is mounted in the corrosion-resistant inner sleeve and on the broken storage tank, an end of the telescopic assembly is provided with a guide plate, and the guide plate is movably connected with the corrosion-resistant inner sleeve.

[0012] Further, a drainage port is formed in the inner wall of the bottom of the broken storage tank and on the inner side of the brick lining, and a residue discharge port is formed in the outer wall of the broken storage tank.

[0013] Further, a blower is fixed on the tank cover at the top of the broken storage tank through bolts, an electric resistance wire is mounted on the bottom of the tank cover, and the blower is provided with an air outlet on the inner side of the tank cover.

[0014] The application also provides a waste residue recovery method based on polyaluminum chloride processing, and the specific steps are as follows:

[0015] The waste residue in the polyaluminum chloride waste residue slurry buffer tank after preliminary dehydration by sedimentation is sent into the storage hopper of the crushing storage tank, the tank cover is closed, the electric resistance wire and the air blower are started, and the waste residue is blown by the heat gas;

[0016] The telescopic assembly controls the activity of the guide plate, realizes the sliding of the waste residue in the corrosion-resistant inner sleeve, discharges the waste residue into the rotary cylinder, and drives the rotary cylinder to rotate by the motor, so that the waste residue moves to the gap between the upper pressing plate and the lower pressing plate, the slide column connected with the upper pressing plate and the slide sleeve connected with the lower pressing plate are limited by the upper arc-shaped grooves of the limiting sleeves one and two, the waste residue in the gap is driven to move, and the waste residue is crushed by extrusion in the centrifugal dehydration process;

[0017] The waste residue is centrifugally drained on the outer wall of the rotary cylinder, comes to the inner wall at the bottom of the crushing storage tank through the gap at the top of the brick lining, and is discharged through the liquid discharge port, so that the waste residue continuously thrown in does not affect the pressing of the upper pressing plate and the lower pressing plate, the single pressing and discharging time is set, then the limiting sleeve one is controlled to rotate, the activity state of the upper pressing plate is changed, the waste residue that has finished dehydration and crushing is thrown out of the discharge groove along with the rotation of the rotary cylinder, finally falls along the outer wall of the brick lining to the side of the residue discharge port, and the filtrate and the filter residue are classified and collected.

[0018] Compared with the prior art, the application has the following beneficial effects:

[0019] 1、In the application, centrifugal dehydration and mechanical extrusion crushing are innovatively integrated, the waste residue treatment efficiency and quality are significantly improved, the centrifugal force generated by the rotation of the rotary cylinder is used for preliminary dehydration, the periodic pressing motion of the upper pressing plate and the lower pressing plate is used for dynamic extrusion crushing of the waste residue, the synergistic effect of centrifugal force and extrusion effectively solves the problems of low dehydration efficiency and high moisture content of filter cake caused by corrosion of filter cloth of a traditional plate and frame filter press, and the application is especially suitable for strong acid polyaluminum chloride waste residue;

[0020] Meanwhile, the convex structures on the opposite sides of the pressing plate crush the waste residue agglomerates in the closing process, improve the uniformity of the waste residue, the centrifugal force simultaneously quickly throws away the liquid released by extrusion through the outer wall of the rotary cylinder, and the liquid is discharged through the liquid discharge port after being intercepted by the brick lining, so that the complicated process of crushing and dehydration in the traditional equipment is avoided, and the treatment cycle is shortened by about 40%.

[0021] 2、In the application, by independently driving the limiting sleeve one to change the phase of the arc-shaped groove, the movement trajectory of the upper pressing plate is flexibly adjusted, when the arc-shaped grooves are symmetrically distributed in the pressing stage, the upper and lower pressing plates are closed to extrude the waste residue, in the residue discharging stage, the phase of the arc-shaped groove is adjusted to make the upper pressing plate lift up, the waste residue is released to be centrifugally thrown out through the residue discharging groove, and is slid along the brick lining to the residue discharging port, the feeding rhythm of the material guide plate is controlled in combination with the telescopic assembly, the interference of the untreated waste residue on pressing is avoided, and the single treatment capacity is controllable;

[0022] And the whole process is corrosion-resistant and sealed, and the pollution risk is eliminated, the corrosion-resistant inner sleeve and the brick lining resist the erosion of strong acid waste residue, prolong the service life of the equipment, the tank cover is integrated with the resistance wire and the air blower, hot air is introduced to dry the waste residue and inhibit the escape of acid mist, the supporting flue gas extraction assembly further guarantees the safety of the operating environment, and the environmental protection requirements are met. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a whole structure schematic view of the waste residue recovery device for processing polyaluminum chloride;

[0024] Figure 2 It is a bottom structure schematic view of the waste residue recovery device for processing polyaluminum chloride;

[0025] Figure 3 It is a schematic view of the installation structure of the inner brick lining of the crushing storage tank;

[0026] Figure 4 It is a schematic view of the connection of the outer wall of the limiting sleeve, the slide column, the slide sleeve and the limiting sleeve of the extrusion centrifugal mechanism;

[0027] Figure 5 It is a schematic view of the installation structure of the upper pressing plate and the lower pressing plate in the corrosion-resistant inner sleeve;

[0028] Figure 6 It is a schematic view of the extrusion and crushing of polyaluminum chloride by the upper and lower pressing plates when the corrosion-resistant inner sleeve drives the rotary cylinder to rotate;

[0029] Figure 7 It is a schematic view of the centrifugal discharge structure of polyaluminum chloride by the upper and lower pressing plates when the corrosion-resistant inner sleeve drives the rotary cylinder to rotate.

[0030] In the drawing: 1, crushing storage tank; 2, tank cover; 3, resistance wire; 4, air blower; 5, transmission assembly one; 6, transmission assembly two; 7, rotary sleeve one; 8, rotary sleeve two; 9, corrosion-resistant inner sleeve; 10, limiting sleeve one; 11, limiting sleeve two; 12, arc-shaped groove; 13, extrusion centrifugal mechanism; 131, rotary cylinder; 132, upper pressing plate; 133, slide column; 134, lower pressing plate; 135, slide sleeve; 136, residue discharging groove; 14, storage hopper; 15, telescopic assembly; 16, material guide plate; 17, brick lining; 18, residue discharging port; 19, discharge port; 20, liquid discharge port. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0032] Please refer to Figures 1-7 , the present application provides a technical solution:

[0033] Embodiment 1: as Figure 1 shown, the structure of the PAC waste residue recovery device is a system engineering with strong acid corrosion resistance as the core, taking into account wear resistance, anti-blocking, efficient separation, safety and environmental protection. The main body is composed of a crushing storage tank 1 and a tank cover 2. The waste residue dewatering is completed by centrifugal extrusion, and the pressing and crushing during waste residue dewatering are also taken into account. The solid-liquid separation is efficient.

[0034] As Figure 4 shown, unlike traditional plate and frame and chamber filter presses, PAC waste residue contains unreacted hydrochloric acid, aluminum chloride, aluminum salt and other impurities, which are strongly acidic and corrosive to filter cloth during the pressing process. At the same time, there is a lack of treatment for PAC clumped waste residue, which leads to loose filter cake and increased moisture content. In addition, the cleaning of the filter plate after pressing will affect the efficiency of PAC waste residue treatment. The crushing storage tank 1 is provided with a storage hopper 14, and the bottom is provided with an extrusion centrifugal mechanism 13. The PAC waste residue dewatering treatment is carried out by centrifugal extrusion.

[0035] The crushing storage tank 1 is provided with a rotating sleeve 7 and a rotating sleeve 8, which are driven to rotate by a transmission assembly 5 and a transmission assembly 6. The rotating sleeve 7 is connected to a corrosion-resistant inner sleeve 9. The PAC waste residue stored in the storage hopper 14 automatically enters the rotating cylinder 131 on both sides of the warehouse through the discharge port 19 of the corrosion-resistant inner sleeve 9.

[0036] As Figure 5 shown, the rotating cylinder 131 on both sides of the warehouse is slidably connected with an upper pressing plate 132 and a lower pressing plate 134, and the opposite sides of the plate surface are provided with protrusions. When the upper pressing plate 132 and the lower pressing plate 134 are closed, the clumped PAC waste residue is crushed by extrusion closure, which improves the overall uniformity of the PAC waste residue. In addition, the rotating cylinder 131 rotates during the extrusion process, so that the excess water is quickly discharged along the filter holes on the outer wall of the rotating cylinder 131.

[0037] Compared with pure extrusion waste residue, the centrifugal plus compression dehydration efficiency is higher, and finally the dehydration filter residue is separated, and the filter residue adhered between the upper and lower compression plates 134 is thrown away by the centrifugal force generated by the rotation of the rotary cylinder 131, and finally discharged outside the brick lining 17 through the rotary sleeve upper discharge port. Since the filter residue and filtrate are discharged from the outside of the rotary cylinder 131, subsequent mixing is avoided, and the movement track of the upper and lower compression plates 134 needs to be changed;

[0038] The driving of the upper and lower compression plates 134 and the switching of the movement track are related to the problems such as Figure 4 As shown in the figure, the corrosion-resistant inner sleeve 9 is connected to the shaft of the rotary sleeve one 7, and the rotary cylinder 131 is connected to the corrosion-resistant inner sleeve 9. With the rotation of the rotary sleeve one 7, the corrosion-resistant inner sleeve 9 drives the rotary cylinder 131 to rotate, as shown in the figure Figure 5 As shown in the figure, the corrosion-resistant inner sleeve 9 rotates, which facilitates the waste residue stored in the storage hopper 14 to be thrown into the two side bin bodies of the rotary cylinder 131 from the discharge port 19. On the contrary, the position distribution of the upper and lower compression plates 134 in the bin body is closely related to the limit sleeve one 10 and the limit sleeve two 11 arranged at the bottom;

[0039] As shown in the figure Figure 6 When the limit sleeve one 10 and the limit sleeve two 11 are symmetrically distributed on the outer wall of the arc-shaped groove 12, the side wall of the sliding sleeve 135 connected to the lower compression plate 134 is in abutment with the arc-shaped groove 12 on the limit sleeve two 11, and the side wall of the sliding column 133 connected to the upper compression plate 132 is in abutment with the arc-shaped groove 12 on the limit sleeve one 10. From left to right, the upper compression plate 132 at the top moves downward, and the lower compression plate 134 at the bottom moves upward, and a compression state is formed at the right side position. When the rotary cylinder 131 rotates from right to left, the upper and lower compression plates 134 are unfolded and separated from the waste residue compression, and at the same time, the lower compression plate 134 descends, causing the discharge port 19 on the corrosion-resistant inner sleeve 9 to open, and part of the waste residue will enter again;

[0040] To avoid the frequent entering of waste residue affecting the fixed closed distance of the upper and lower compression plates 134, causing the deformation of the abutment position of the sliding column 133 and the sliding sleeve 135, at this time, the whole centrifugal compression discharge amount of the rotary cylinder 131 needs to be controlled. For this purpose, as shown in the figure Figure 7 A guide plate 16 is arranged in the whole corrosion-resistant inner sleeve 9, and the position of the guide plate 16 in the corrosion-resistant inner sleeve 9 is controlled by the telescopic assembly 15, so as to control the waste residue in the storage hopper 14 to enter the bin body of the rotary cylinder 131;

[0041] After the extrusion of the upper and lower compression plates 134 and the rotation of the whole rotary cylinder 131, the waste residue is broken at the same time, and the liquid is discharged through the filter hole of the side wall of the rotary cylinder 131. Since the lower compression plate 134 is close to the discharge groove 136 during the rising process, if there is no interception of the upper compression plate 132, the waste residue is easy to be thrown out through the discharge groove 136;

[0042] Using this point, as shown in the figure Figure 7As shown, when the waste residue after pressure filtration centrifugation needs to be separated, the movement track of the entire upper pressing plate 132 in the barrel 131 is controlled, and since the slide column 133 connected with the upper pressing plate 132 abuts against the limiting sleeve one 10, the position adjustment of the upper pressing plate 132 in the rotating process is realized by changing the storage state of the arc-shaped groove 12 on the entire limiting sleeve one 10;

[0043] When the arc-shaped groove 12 on the limiting sleeve one 10 is oriented to be the same as the limiting sleeve two 11, at this time, as shown in the figure, Figure 7 As shown, with the rotation of the barrel 131, the upper and lower pressing plates 134 are simultaneously movable and synchronously move upward, so that the waste residue can only be centrifuged and cannot complete the pressing work, at this time, when the lower pressing plate 134 rises and there is no interception of the upper pressing plate 132, the top waste residue is thrown out from the position of the residue discharge groove 136 through the centrifugal effect, and the automatic material removal work of the waste residue is completed, at this time, the rotation speed of the barrel 131 can be increased to speed up the dewatering and external discharge of the waste residue.

[0044] As shown, Figure 3 The brick lining 17 is arranged in the crushing storage tank 1 located on the outer wall of the barrel 131, the height of the brick lining 17 is at the bottom of the residue discharge groove 136, the waste residue thrown out with the rotation of the barrel 131 falls to the gap of the crushing storage tank 1 through the brick lining 17, and finally the oblique cutting surface arranged at the same time is guided to the residue discharge port 18 position to complete the dewatering and residue discharge work, and the barrel 131 used for liquid discharge side is flush with the brick lining 17, the liquid discharged through the through hole of the barrel 131 is directly intercepted by the brick lining 17 and comes to the bottom of the crushing storage tank 1, and finally the liquid is discharged through the sinking type designed liquid discharge port 20 to complete the solid-liquid separation.

[0045] In example 2, according to the heat sensitivity of the material, the final water content requirement and the yield selection, the entire tank cover 2 is also designed with a drying mechanism, and the entire crushing storage tank 1 is sealed to avoid acid mist leakage during the dewatering and separation of the waste residue, as shown, Figure 1 The blast is arranged on the top of the tank cover 2, and the resistance wire 3 is installed on the bottom of the tank cover 2, the heated resistance wire 3 is blown to the storage hopper 14 by the air blower 4 to complete the drying of the temporarily stored waste residue, and the flue gas extraction assembly is arranged on the tank cover 2 to avoid the flue gas entering the air.

[0046] The above content is only an example and description of the structure of the present application, and those skilled in the art can make various modifications or supplements or adopt similar ways to replace the described specific embodiments, as long as the modifications or supplements do not deviate from the structure of the present application or exceed the scope defined by the present application, and all of the above shall belong to the protection scope of the present application.

[0047] In the description of the specification, reference to "one embodiment", "an example", "a specific example" or the like means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "an example", "a specific example" or the like in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0048] The preferred embodiments of the application disclosed above are only to help explain the application. The preferred embodiments do not describe all the details of the application and limit the application to the specific embodiments. Obviously, many modifications and variations can be made in light of the contents of the specification. The specification selects and specifically describes these embodiments in order to better explain the principles and practical application of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A waste residue recovery device based on polyaluminum chloride processing, comprising a crushing storage tank (1) and a tank cover (2), the top of the crushing storage tank (1) is rotatably connected with the tank cover (2), characterized in that, The broken storage tank (1) top is provided with a storage hopper (14), the bottom inner wall of the broken storage tank (1) is movably connected with a corrosion-resistant inner sleeve (9), and the top end of the corrosion-resistant inner sleeve (9) is movably connected with the bottom of the storage hopper (14), a discharge port (19) is formed in the corrosion-resistant inner sleeve (9), and the outer wall of the corrosion-resistant inner sleeve (9) is movably connected with an extrusion centrifugal mechanism (13), and a brick lining (17) is mounted on the inner wall of the broken storage tank (1) and located outside the extrusion centrifugal mechanism (13). The extrusion centrifugal mechanism (13) comprises a rotating cylinder (131), an upper pressing plate (132) and a lower pressing plate (134), the rotating cylinder (131) is movably connected with the discharge port (19) of the corrosion-resistant inner sleeve (9), and the inner wall of the symmetrical bin body of the rotating cylinder (131) is connected with the discharge port (19), the outer wall of the rotating cylinder (131) is symmetrically provided with a slag discharge groove (136), and the inner wall of the bin body of the rotating cylinder (131) is movably connected with the lower pressing plate (134) and the upper pressing plate (132), the upper pressing plate (132) is located on the top of the lower pressing plate (134), and the opposite surfaces are uniformly provided with protrusions. The bottom of the rotating cylinder (131) is provided with a sliding sleeve (135), one side of the sliding sleeve (135) penetrates the rotating cylinder (131) and is fixed with the lower pressing plate (134), the sliding sleeve (135) is movably connected with a sliding column (133), and one end of the sliding column (133) penetrates the sliding sleeve (135) and is fixed with the upper pressing plate (132), the inner wall of the broken storage tank (1) and the corrosion-resistant inner sleeve (9) are movably connected with a limiting sleeve two (11), and the bottom of the limiting sleeve two (11) is movably connected with a limiting sleeve one (10).

2. The waste residue recycling device based on polyaluminum chloride processing according to claim 1, characterized in that, The limiting sleeve one (10) and the limiting sleeve two (11) are movably connected with an arc-shaped groove (12), the side wall fixed rod of the sliding column (133) is in abutment with the arc-shaped groove (12) of the side wall of the limiting sleeve one (10), and the side wall fixed rod of the sliding sleeve (135) is in abutment with the arc-shaped groove (12) of the side wall of the limiting sleeve two (11).

3. The waste residue recycling device based on polyaluminum chloride processing according to claim 2, characterized in that, The bottom of the broken storage tank (1) is provided with a rotating sleeve one (7) and a rotating sleeve two (8), the axis of the rotating sleeve two (8) penetrates the bottom of the broken storage tank (1) and is connected with the inner wall of the limiting sleeve one (10) through a gear and a toothed pattern, the axis of the rotating sleeve one (7) penetrates the rotating sleeve two (8) and is fixed with the corrosion-resistant inner sleeve (9), the outer wall of the broken storage tank (1) is provided with a transmission assembly one (5) and a transmission assembly two (6), and the motors on the transmission assembly one (5) and the transmission assembly two (6) are connected with the rotating sleeve one (7) and the rotating sleeve two (8) through a belt.

4. The waste residue recycling device based on polyaluminum chloride processing according to claim 3, characterized in that, The corrosion-resistant inner sleeve (9) is movably connected with a telescopic assembly (15), and the end of the telescopic assembly (15) is provided with a guide plate (16).

5. The waste residue recycling device based on polyaluminum chloride processing according to claim 4, characterized in that, The bottom inner wall of the broken storage tank (1) and the inner side of the brick lining (17) are provided with a drainage port (20), and the outer wall of the broken storage tank (1) is provided with a slag discharge port (18).

6. The waste residue recycling device based on polyaluminum chloride processing according to claim 5, characterized in that, The blast fan (4) is fixed on the tank cover (2) of the crushing storage tank (1) by bolts, the tank cover (2) is provided with the resistance wire (3), and the blast fan (4) is provided with the air outlet on the inner side of the tank cover (2).

7. A method for recovering waste sludge based on polyaluminum chloride processing, using the waste sludge recovery device based on polyaluminum chloride processing according to claim 6, characterized in that, The specific steps are as follows: The waste residue in the buffer tank of the polyaluminum chloride waste residue slurry after preliminary dehydration by sedimentation is sent into the storage hopper (14) of the crushing storage tank (1), the tank cover (2) is closed, the resistance wire (3) and the blast fan (4) are started at the same time, and the waste residue is blown by the heat gas; The telescopic assembly (15) controls the activity of the guide plate (16), realizes the sliding of the waste residue in the corrosion-resistant inner sleeve (9), discharges the waste residue into the rotary cylinder (131), and drives the rotary cylinder (131) to rotate by the motor, the waste residue moves to the gap between the lower pressing plate (134) and the upper pressing plate (132) in the rotary cylinder (131), the slide column (133) connected with the upper pressing plate (132) and the slide sleeve (135) connected with the lower pressing plate (134) are limited by the upper arc-shaped grooves (12) of the limiting sleeve one (10) and the limiting sleeve two (11), the gap waste residue is driven to move, and the waste residue is crushed by extrusion in the centrifugal dehydration process; The waste residue is centrifugally drained on the outer wall of the rotary cylinder (131), comes to the inner wall of the bottom of the crushing storage tank (1) through the top gap of the brick lining (17), and is discharged through the liquid discharge port (20), so that the waste residue continuously thrown in does not affect the pressing of the upper pressing plate (132) and the lower pressing plate (134), the single pressing and discharging time is set, then the limiting sleeve one (10) is controlled to rotate, the activity state of the upper pressing plate (132) is changed, the waste residue is thrown out of the residue discharge groove (136) along with the rotation of the rotary cylinder (131), and finally falls along the outer wall of the brick lining (17) to the side of the residue discharge port (18), so that the filtrate and the filter residue are classified and collected.

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