Compression dehydrator for harmless treatment of phosphogypsum

Abstract

The invention discloses a compression dehydrator for harmless treatment of ardealite, and relates to the technical field of ardealite treatment. The device comprises a shell, a separation assembly is arranged on the lower portion in the shell, and a feeding assembly is arranged at the feeding end of the shell; the separation assembly comprises a mounting frame fixedly connected to the lower portion in the shell, a filter plate is fixedly connected to the interior of the mounting frame, a water collecting cover is fixedly connected to the lower portion of the mounting frame, and a water collecting tank is fixedly connected to the bottom of the water collecting cover. A washing pipe is driven to move through a lead screw and a sliding block, filtered water in a water collecting tank is used for washing a filter plate through the washing pipe and a high-pressure spray head, the problem that an existing compression dehydrator is poor in filter plate cleaning effect is solved, meanwhile, a second hydraulic cylinder drives a lifting frame and a compression roller to ascend and descend, and the cleaning effect of the compression dehydrator is improved. And the phosphogypsum is uniformly distributed on the conveying belt through the compression roller, so that the problem that an existing compression dehydrator is inconvenient to uniformly feed is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of phosphogypsum treatment, and in particular relates to a compression dehydrator used for harmless treatment of phosphogypsum. Background Art

[0002] Phosphogypsum is one of the main solid wastes in the phosphorus chemical industry, and the harmless treatment of phosphogypsum is an important issue facing the phosphorus chemical industry, aiming to reduce pollution to the environment and provide resource utilization efficiency. The main harmless treatment methods include water washing purification, flotation, roasting and neutralization. The water washing purification method is to wash the phosphogypsum with a large amount of clean water to effectively remove water-soluble pollutants. In the process of treating phosphogypsum with the water washing purification method, the purified phosphogypsum contains a large amount of water. In order to facilitate the dehydration of phosphogypsum, a compression dehydrator is usually used; The existing document with publication number CN117225069A discloses a compression dehydrator for harmless treatment of phosphogypsum, comprising a main body assembly, a separation assembly and a feeding assembly are respectively arranged on both sides of the main body assembly, and a cleaning assembly is arranged below the feeding assembly; the main body assembly comprises a housing, a pressing plate, a first filter plate, and a first scraper; the separation assembly comprises a separation shell, a second filter plate, and a cam; the cleaning assembly comprises a mounting frame, a movable plate, and a second scraper; However, it still has the following disadvantages in actual use: The above-mentioned compression dehydrator, whose separation component includes a separation shell, a second filter plate and a cam, applies pressure to the phosphogypsum on the second filter plate through the pressure plate in the main assembly, so as to dehydrate the phosphogypsum through the second filter plate. However, during use, part of the phosphogypsum will be stuck inside the filter holes of the second filter plate under the action of the pressure plate, thereby causing the second filter plate to be blocked, thereby affecting the subsequent dehydration effect; The above-mentioned compression dehydrator, its feeding component includes a mounting shell respectively located at the front and rear ends, an active roller and a driven roller respectively movably connected on both sides of the adjacent mounting shells, and a filter belt mounted on the active roller and the driven roller. The filter belt is driven by the active roller and the driven roller to move, and the phosphogypsum is transported to the main component for dehydration by the filter belt. However, during use, it is impossible to ensure that the phosphogypsum is evenly distributed on the filter belt, and thus it is impossible to ensure that the phosphogypsum can be evenly distributed on the second filter plate. The uneven distribution of phosphogypsum will lead to poor dehydration effect, so its overall dehydration effect is poor.

[0003] To this end, we provide a compression dehydrator for harmless treatment of phosphogypsum to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a compression dehydrator for harmless treatment of phosphogypsum, which drives the flushing pipe to move through a screw rod and a slider, and uses the filtered water in the water collecting tank to flush the filter plate through the flushing pipe and the high-pressure nozzle, thereby solving the problem that the existing compression dehydrator has a poor cleaning effect on the filter plate. At the same time, the lifting frame and the pressure roller are driven to rise and fall through the second hydraulic cylinder, and the phosphogypsum is evenly distributed on the conveyor belt through the pressure roller, thereby solving the problem that the existing compression dehydrator is not convenient for uniform feeding.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a compression dehydrator for harmless treatment of phosphogypsum, comprising a shell, a separation component is arranged at the lower part of the shell, and a feeding component is arranged at the feeding end of the shell; The separation component includes a mounting frame fixedly connected to the lower part of the inner part of the shell, a filter plate is fixedly connected to the inner part of the mounting frame, a water collecting cover is fixedly connected to the lower part of the mounting frame, a water collecting box is fixedly connected to the bottom of the water collecting cover, screw rods are rotatably connected to both sides of the upper part of the mounting frame, a slider is provided on the threaded sleeve of the screw rod, flushing pipes are fixedly connected between adjacent sliders, and a plurality of high-pressure nozzles are fixedly connected to the flushing pipes at equal intervals; The feeding assembly includes mounting plates fixedly connected to the front and rear ends respectively, a conveyor belt is movably connected between the mounting plates, first ear seats are welded to the center positions of the end faces of the mounting plates that are away from each other, the bottoms of the first ear seats are fixedly connected to the second hydraulic cylinders, the piston shafts of the second hydraulic cylinders are fixedly connected to the lifting frame, a fixing plate is welded to the bottom of the lifting frame, a plurality of mounting seats are fixedly connected to the front and rear ends of the lower surface of the fixing plate at equal intervals, and a pressure roller is rotatably connected between the front and rear adjacent mounting seats.

[0006] The present invention is further configured as follows: a plurality of filters are fixedly connected at equal intervals on the upper interior of the water collecting tank, a submersible pump is fixedly connected on the lower interior of the water collecting tank, a connecting pipe is fixedly connected to the water outlet of the submersible pump, and an end of the connecting pipe away from the submersible pump is fixedly connected to the flushing pipe.

[0007] The present invention is further configured as follows: baffles are welded at the center positions of the front and rear ends of the top of the installation frame, bearing seats are fixedly connected on both sides of the rear end of the top of the installation frame, the rear end of the screw rod is rotatably connected to the inside of the bearing seat, and the front end of the screw rod rotates through the front end surface of the outer shell and is sleeved with a driven wheel.

[0008] The present invention is further configured as follows: a first drive motor is fixedly connected to the top front end of the housing via a first motor frame, a driving wheel is sleeved on the output shaft of the first drive motor, and the driving wheel is transmission-connected to the driven wheel via a V-belt.

[0009] The present invention is further configured as follows: a material pressing assembly is arranged above the interior of the shell, the material pressing assembly includes a pressure plate movably connected to the interior of the shell and a plurality of first hydraulic cylinders fixedly connected to the top of the shell at equal intervals, first sliding rods are welded around the upper surface of the pressure plate, the top end of the first sliding rod movably passes through the top of the shell and is threadedly sleeved with a first limiting nut, and the piston shaft of the first hydraulic cylinder movably passes through the top of the shell and is fixedly connected to the center position of the upper surface of the pressure plate.

[0010] The present invention is further configured as follows: the feed end of the shell is fixedly connected to a mounting frame, the mounting plates are respectively fixedly connected to the front and rear ends of the top of the mounting frame, a guide plate is welded at the feed port of the shell, and the guide plate extends from one end of the shell away from the shell to the unloading end of the conveyor belt.

[0011] The present invention is further configured as follows: active rollers and driven rollers are rotatably connected on both sides of adjacent mounting plates, and both ends of the conveyor belt are respectively sleeved on the active roller and the driven roller; a second drive motor is fixedly connected to one side of the front end of the mounting plate located in the front through a second motor frame, and an output shaft of the second drive motor is fixedly connected to the front end of the active roller.

[0012] The present invention is further configured as follows: second ear seats are welded on both sides of the end faces of the mounting plate that are away from each other, second sliding rods are movably penetrated through the surfaces of the second ear seats, the top ends of the second sliding rods are welded to the front and rear ends on both sides of the bottom of the lifting frame, and the bottom end of the second sliding rod is threadedly sleeved with a second limiting nut.

[0013] The present invention has the following beneficial effects: The present invention sets a separation component, starts a submersible pump and a first drive motor, the submersible pump draws out filtered water in the water collecting tank and transports it into the flushing pipe through a connecting pipe, and sprays the water onto the filter plate through a high-pressure nozzle, and at the same time the first drive motor drives the screw rod to rotate through a driving wheel and a V-belt, and under the action of the threaded connection between the screw rod and the slider, the slider drives the flushing pipe to move, thereby achieving the cleaning of the filter plate, avoiding the dehydration efficiency being affected by the clogging of the filter plate, and improving the dehydration efficiency of the phosphogypsum.

[0014] The present invention sets a feeding component and starts a second hydraulic cylinder, which drives a lifting frame to move. The lifting frame drives a pressure roller to move up and down through a fixed plate, so that the pressure roller moves to a specified height. During the transportation of phosphogypsum, the phosphogypsum is evenly distributed on the conveyor belt through the pressing effect of the pressure roller, and then the phosphogypsum can be evenly distributed in the compression dehydration structure inside the shell, thereby avoiding the dehydration effect being affected by the uneven distribution of the phosphogypsum, and enhancing the dehydration effect of the phosphogypsum.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 The figure is a schematic diagram of the overall structure of a compression dehydrator used for harmless treatment of phosphogypsum.

[0018] Figure 2 It is a schematic structural diagram of the housing of the present invention.

[0019] Figure 3 It is a schematic diagram of the structure of the separation component of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the installation frame of the present invention.

[0021] Figure 5 It is a partial cross-sectional view of the water collecting tank of the present invention.

[0022] Figure 6 It is a structural schematic diagram of the screw rod of the present invention.

[0023] Figure 7 It is a schematic diagram of the structure of the flushing pipe of the present invention.

[0024] Figure 8 It is a schematic structural diagram of the material pressing assembly of the present invention.

[0025] Fig. 9 It is a schematic structural diagram of the feeding assembly of the present invention.

[0026] Fig.10 It is a schematic diagram of the installation between the mounting plate and the conveyor belt of the present invention.

[0027] Fig.11 It is a structural schematic diagram of the lifting frame of the present invention.

[0028] Fig.12 It is a schematic diagram of the installation between the fixed plate and the pressure roller of the present invention.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1-housing, 101-mounting frame, 102-material guide plate, 2-separation assembly, 201-mounting frame, 201a-baffle, 201b-water collecting cover, 201c-bearing seat, 202-filter plate, 203-water collecting box, 203a-filter screen, 204-screw rod, 204a-driven wheel, 205-flushing pipe, 205a-sliding block, 205b-high pressure nozzle, 205c-submersible pump, 205d-connecting pipe, 206-first driving motor, 206a-first motor frame, 206b-driving wheel, 206c-V belt, 3-pressing group Parts, 301-pressing plate, 301a-first sliding rod, 301b-first limiting nut, 302-first hydraulic cylinder, 4-feeding assembly, 401-mounting plate, 401a-first ear seat, 401b-second ear seat, 402-conveyor belt, 402a-active roller, 402b-driven roller, 402c-second motor frame, 402d-second drive motor, 403-second hydraulic cylinder, 404-lifting frame, 404a-second sliding rod, 404b-second limiting nut, 405-fixed plate, 405a-mounting seat, 406-pressing roller. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0031] See also Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, it is the first embodiment of the present invention, which provides a compression dehydrator for harmless treatment of phosphogypsum, including a shell 1, a separation component 2 is arranged at the lower part of the shell 1, and the separation component 2 includes a mounting frame 201, a filter plate 202, a water collecting tank 203, a screw 204 and a flushing pipe 205. The flushing pipe 205 is driven to move by the screw 204 and the slider 205a, and the filtered water in the water collecting tank 203 is used to flush the filter plate 202 through the flushing pipe 205 and the high-pressure nozzle 205b, thereby solving the problem that the cleaning effect of the filter plate 202 of the existing compression dehydrator is not ideal.

[0032] Specifically, the mounting frame 201 is fixedly connected to the lower part of the housing 1, the interior of the mounting frame 201 is fixedly connected with a filter plate 202, the lower part of the mounting frame 201 is fixedly connected with a water collecting cover 201b, the bottom of the water collecting cover 201b is fixedly connected with a water collecting box 203, the upper sides of the mounting frame 201 are rotatably connected with screw rods 204, the screw rods 204 are threadedly sleeved with sliders 205a, the adjacent sliders 205a are fixedly connected with flushing pipes 205, and the flushing pipes 205 are evenly spaced. There are multiple high-pressure nozzles 205b fixedly connected, the installation frame 201 is used to install the filter plate 202, the water collecting cover 201b is used to ensure that the separated water falls into the water collecting box 203, the water collecting box 203 is used to collect and store the separated water, the screw rod 204 and the slider 205a are used to drive the flushing pipe 205 to move, and the flushing pipe 205 and the high-pressure nozzle 205b are used to flush and clean the filter plate 202.

[0033] Furthermore, a plurality of filters 203a are fixedly connected at equal intervals on the upper part of the water collecting tank 203, a submersible pump 205c is fixedly connected to the lower part of the water collecting tank 203, a connecting pipe 205d is fixedly connected to the water outlet of the submersible pump 205c, and one end of the connecting pipe 205d away from the submersible pump 205c is fixedly connected to the flushing pipe 205, and the connecting pipe 205d is a retractable hose; Baffles 201a are welded at the center positions of the front and rear ends of the top of the installation frame 201, and bearing seats 201c are fixedly connected to both sides of the top rear end of the installation frame 201. The rear end of the screw rod 204 is rotatably connected to the inside of the bearing seat 201c, and the front end of the screw rod 204 is rotatably penetrated through the front end surface of the housing 1 and is sleeved with a driven wheel 204a. The top front end of the housing 1 is fixedly connected to a first drive motor 206 through a first motor frame 206a. A driving wheel 206b is sleeved on the output shaft of the first drive motor 206. The driving wheel 206b is connected to the driven wheel 204a through a V-belt 206c. A pressing assembly 3 is arranged above the interior of the shell 1, and the pressing assembly 3 includes a pressing plate 301 movably connected to the interior of the shell 1 and a plurality of first hydraulic cylinders 302 fixedly connected to the top of the shell 1 at equal intervals. First slide bars 301a are welded around the upper surface of the pressing plate 301, and the top end of the first slide bar 301a movably passes through the top of the shell 1 and is threadedly sleeved with a first limiting nut 301b, and the piston shaft of the first hydraulic cylinder 302 movably passes through the top of the shell 1 and is fixedly connected to the center position of the upper surface of the pressing plate 301.

[0034] The operation process of this embodiment is as follows: first, put the phosphogypsum on the filter plate 202, and start the first hydraulic cylinder 302, the first hydraulic cylinder 302 drives the pressing plate 301 to move up and down, so that the pressing plate 301 applies an external force to the phosphogypsum on the filter plate 202, thereby cooperating with the action of the filter plate 202 to achieve the dehydration of the phosphogypsum, then remove the dehydrated phosphogypsum from the filter plate 202, and start the submersible pump 205c and the first drive motor 206, the submersible pump 205c will The filtered water in the water collecting tank 203 is pumped out and transported into the flushing pipe 205 through the connecting pipe 205d, and the water is sprayed onto the filter plate 202 through the high-pressure nozzle 205b. At the same time, the first drive motor 206 drives the screw rod 204 to rotate through the driving wheel 206b and the V-belt 206c, and under the action of the threaded connection between the screw rod 204 and the slider 205a, the slider 205a drives the flushing pipe 205 to move, thereby realizing the cleaning of the filter plate 202. Example 2

[0035] See also Figure 1 , Figure 2 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, it is the second embodiment of the present invention, which is based on the previous embodiment, but is different from the previous embodiment in that: a feeding assembly 4 is provided at the feeding end of the shell 1, and the feeding assembly 4 includes a mounting plate 401, a conveyor belt 402, a second hydraulic cylinder 403, a lifting frame 404, a fixed plate 405 and a pressure roller 406. The phosphogypsum is transported to the inside of the shell 1 by the conveyor belt 402, and the fixed plate 405 and the pressure roller 406 are driven to rise and fall by the second hydraulic cylinder 403 and the lifting frame 404, so that the phosphogypsum is evenly distributed on the conveyor belt 402 through the pressure roller 406, which solves the problem that the existing compression dehydration machine is not convenient for evenly distributing the phosphogypsum.

[0036] Specifically, the mounting plate 401 is provided with two mounting plates 401 respectively fixedly connected at the front and rear ends, a conveyor belt 402 is movably connected between the mounting plates 401, first ear seats 401a are welded at the center positions of the end faces of the mounting plates 401 that are away from each other, the bottoms of the first ear seats 401a are fixedly connected to the second hydraulic cylinder 403, the piston shaft of the second hydraulic cylinder 403 is fixedly connected to the lifting frame 404, a fixing plate 405 is welded to the bottom of the lifting frame 404, a plurality of mounting seats 405a are fixedly connected at equal intervals at the front and rear ends of the lower surface of the fixing plate 405, and a pressure rod 405a is rotatably connected between the front and rear adjacent mounting seats 405a. Roller 406, the installation plate 401 is used to install the conveyor belt 402, the first ear seat 401a is used to install the second hydraulic cylinder 403, the conveyor belt 402 is used to drive the phosphogypsum to move, thereby realizing automatic loading of the shell 1, the second hydraulic cylinder 403 is used to drive the lifting frame 404 to lift, the lifting frame 404 is used to drive the fixed plate 405 and the pressure roller 406 to lift, the fixed plate 405 and the installation seat 405a are used to install the pressure roller 406, and the pressure roller 406 is used to evenly distribute the phosphogypsum on the conveyor belt 402.

[0037] Furthermore, the feed end of the housing 1 is fixedly connected to a mounting frame 101, and the mounting plates 401 are respectively fixedly connected to the front and rear ends of the top of the mounting frame 101. A guide plate 102 is welded at the feed port of the housing 1, and the end of the guide plate 102 away from the housing 1 extends to the unloading end of the conveyor belt 402; The two sides of the adjacent mounting plates 401 are rotatably connected with active rollers 402a and driven rollers 402b, respectively. The two ends of the conveyor belt 402 are respectively sleeved on the active rollers 402a and driven rollers 402b. The front end of the mounting plate 401 located in the front is fixedly connected with a second drive motor 402d through a second motor frame 402c. The output shaft of the second drive motor 402d is fixedly connected to the front end of the active roller 402a. Second ear seats 401b are welded on both sides of the end faces of the mounting plate 401 that are away from each other, and second slide bars 404a are movably penetrated through the surfaces of the second ear seats 401b. The top ends of the second slide bars 404a are welded to the front and rear ends on both sides of the bottom of the lifting frame 404, and the bottom ends of the second slide bars 404a are threadedly sleeved with second limiting nuts 404b.

[0038] The rest of the structure is the same as that of Example 1.

[0039] The operation process of this embodiment is as follows: first, put the phosphogypsum into the feeding end of the conveyor belt 402, and start the second hydraulic cylinder 403, the second hydraulic cylinder 403 drives the lifting frame 404 to move, and the lifting frame 404 drives the pressure roller 406 to move up and down through the fixed plate 405, so that the pressure roller 406 moves to a specified height, and then start the second drive motor 402d, the output shaft of the second drive motor 402d drives the active roller 402a to move, and drives the conveyor belt 402 to move through the active roller 402a, so that the phosphogypsum is transported to the inside of the shell 1 through the guide plate 102 under the action of the conveyor belt 402 for compression and dehydration.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A compression dehydrator for harmless treatment of phosphogypsum, comprising a housing (1), characterized in that: A separation component (2) is arranged at the lower part of the interior of the housing (1), and a loading component (4) is arranged at the feeding end of the housing (1); The separation component (2) comprises a mounting frame (201) fixedly connected to the lower part of the inner part of the housing (1), and a filter plate (202) is fixedly connected to the inner part of the mounting frame (201), a water collecting cover (201b) is fixedly connected to the lower part of the mounting frame (201), and a water collecting box (203) is fixedly connected to the bottom of the water collecting cover (201b), screw rods (204) are rotatably connected to both sides of the upper part of the mounting frame (201), and a slider (205a) is threadedly sleeved on the screw rod (204), flushing pipes (205) are fixedly connected between adjacent sliders (205a), and a plurality of high-pressure nozzles (205b) are fixedly connected to the flushing pipes (205) at equal intervals; The feeding assembly (4) comprises mounting plates (401) respectively fixedly connected to the front and rear ends, and a conveyor belt (402) is movably connected between the mounting plates (401), first ear seats (401a) are welded at the center positions of the end faces of the mounting plates (401) that are away from each other, and the bottoms of the first ear seats (401a) are fixedly connected to a second hydraulic cylinder (403), the piston shaft of the second hydraulic cylinder (403) is fixedly connected to a lifting frame (404), and a fixed plate (405) is welded to the bottom of the lifting frame (404), a plurality of mounting seats (405a) are fixedly connected at equal intervals at the front and rear ends of the lower surface of the fixing plate (405), and a pressure roller (406) is rotatably connected between the front and rear adjacent mounting seats (405a).

2. A compression dehydrator for harmless treatment of phosphogypsum according to claim 1, characterized in that: A plurality of filter screens (203a) are fixedly connected at equal intervals on the upper part of the water collecting tank (203), and a submersible pump (205c) is fixedly connected on the lower part of the water collecting tank (203); a connecting pipe (205d) is fixedly connected to the water outlet of the submersible pump (205c), and one end of the connecting pipe (205d) away from the submersible pump (205c) is fixedly connected to the flushing pipe (205).

3. A compression dehydrator for harmless treatment of phosphogypsum according to claim 1, characterized in that: Baffles (201a) are welded at the center positions of the front and rear ends of the top of the installation frame (201), and bearing seats (201c) are fixedly connected to both sides of the top rear end of the installation frame (201), the rear end of the screw rod (204) is rotatably connected to the inside of the bearing seat (201c), and the front end of the screw rod (204) is rotatably connected to the front end surface of the housing (1) and is sleeved with a driven wheel (204a).

4. A compression dehydrator for harmless treatment of phosphogypsum according to claim 3, characterized in that: The top front end of the housing (1) is fixedly connected to a first drive motor (206) via a first motor frame (206a), and a driving wheel (206b) is sleeved on the output shaft of the first drive motor (206), and the driving wheel (206b) is transmission-connected to a driven wheel (204a) via a V-belt (206c).

5. A compression dehydrator for harmless treatment of phosphogypsum according to claim 4, characterized in that: A material pressing assembly (3) is arranged above the interior of the shell (1), and the material pressing assembly (3) comprises a pressing plate (301) movably connected to the interior of the shell (1) and a plurality of first hydraulic cylinders (302) fixedly connected to the top of the shell (1) at equal intervals, first sliding rods (301a) are welded around the upper surface of the pressing plate (301), and the top end of the first sliding rod (301a) movably passes through the top of the shell (1) and is threadedly sleeved with a first limiting nut (301b), and the piston shaft of the first hydraulic cylinder (302) movably passes through the top of the shell (1) and is fixedly connected to the center position of the upper surface of the pressing plate (301).

6. A compression dehydrator for harmless treatment of phosphogypsum according to claim 1, characterized in that: The feed end of the shell (1) is fixedly connected to a mounting frame (101), and the mounting plate (401) is respectively fixedly connected to the front and rear ends of the top of the mounting frame (101). A guide plate (102) is welded at the feed inlet of the shell (1), and the end of the guide plate (102) away from the shell (1) extends to the unloading end of the conveyor belt (402).

7. A compression dehydrator for harmless treatment of phosphogypsum according to claim 1, characterized in that: The two sides of the adjacent mounting plates (401) are rotatably connected to active rollers (402a) and driven rollers (402b), and the two ends of the conveyor belt (402) are respectively sleeved on the active rollers (402a) and the driven rollers (402b). The front end of the mounting plate (401) located in the front is fixedly connected to a second drive motor (402d) via a second motor frame (402c), and the output shaft of the second drive motor (402d) is fixedly connected to the front end of the active roller (402a).

8. A compression dehydrator for harmless treatment of phosphogypsum according to claim 1, characterized in that: Second ear seats (401b) are welded on both sides of the end faces of the mounting plate (401) that are away from each other, and second slide bars (404a) are movably penetrated through the surfaces of the second ear seats (401b), the top ends of the second slide bars (404a) are welded to the front and rear ends on both sides of the bottom of the lifting frame (404), and the bottom end of the second slide bar (404a) is threadedly sleeved with a second limiting nut (404b).

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