Electrolytic aluminum desulfurization gypsum filter cake recovery system

Abstract

This utility model relates to the field of sulfur-desulfurized gypsum filter cake recovery technology, and discloses an electrolytic aluminum desulfurization gypsum filter cake recovery system, including a spiral dewatering device and a belt conveyor. A drum drying device is installed at the feeding point of the belt conveyor, and an extrusion refining device is installed at the discharge point of the drum drying device. A hopper is installed at the discharge point of the extrusion refining device, and the belt conveyor is located at the discharge point of the spiral dewatering device. In this electrolytic aluminum desulfurization gypsum filter cake recovery system, the gypsum filter cake enters the drying drum after moisture accumulation. Heat transfer heats the surrounding air, causing it to become hot air. During the rotation of the drying drum, the gypsum rotates upwards with the turning plate and then slides down, forming a material curtain. This curtain allows for full contact with the surrounding hot air, drying the gypsum. The dried gypsum filter cake is then ground into a low-density gypsum powder for reuse, increasing the service life of the device.

Description

Technical Field

[0001] This utility model relates to the field of sulfur gypsum filter cake recovery technology, specifically to an electrolytic aluminum desulfurization gypsum filter cake recovery system. Background Technology

[0002] Electrolytic aluminum is aluminum produced by electrolysis. Its core principle is to use cryolite-alumina molten salt electrolysis, in which direct current is used in the electrolytic cell to decompose alumina into aluminum and oxygen.

[0003] Desulfurized gypsum filter cake is a byproduct of wet flue gas desulfurization in thermal power plants. Its main component is calcium sulfate dihydrate, and its moisture content is usually between 10% and 20%. This article discusses its properties, formation process, and resource utilization.

[0004] The gypsum filter cake produced during the desulfurization process in the electrolytic aluminum industry has a high water content. It accumulates on-site for a long time and cannot be disposed of, causing extremely serious environmental pollution. Utility Model Content

[0005] The purpose of this invention is to provide an electrolytic aluminum desulfurization gypsum filter cake recovery system to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an electrolytic aluminum desulfurization gypsum filter cake recovery system, comprising a spiral dewatering device and a belt conveyor, wherein a drum drying device is provided at the feeding point at the top of the belt conveyor, an extrusion refining device is provided at the discharge point of the drum drying device, a hopper is provided at the discharge point of the extrusion refining device, and the belt conveyor is located at the discharge point of the spiral dewatering device.

[0007] The spiral dewatering device includes a dewatering shell, a feed pipe welded to the left side of the top surface of the dewatering shell, a spiral extrusion blade installed inside the dewatering shell, a support assembly installed on the bottom surface of the dewatering shell, a discharge plate bolted to the right side surface of the dewatering shell, and a filter plate bolted to the bottom surface of the dewatering shell.

[0008] The rotary drum drying device includes a drying drum, with an air duct bolted to the left end of the drying drum, a hot air blower bolted to the right end of the drying drum, and a feed plate bolted to the lower right end of the drying drum.

[0009] Preferably, the support assembly includes a support frame, a water collection tank is installed on the inner wall surface of the support frame, a threaded rod two is fixedly connected to the top right surface of the support frame, a limit plate is threadedly connected to the right end of the threaded rod two, and a threaded rod one is threadedly connected to the top of the limit plate.

[0010] Preferably, the first threaded rod is welded to the top of the first blanking plate, and the first threaded rod and the second threaded rod lock and fix the limiting plate, thereby determining the position of the limiting plate and facilitating the disassembly and replacement of the limiting plate.

[0011] Preferably, the dehydration shell is installed on top of the support frame, the support frame determines the position of the dehydration shell and the filter plate, and the filter plate filters the water inside the dehydration shell.

[0012] Preferably, the second threaded rod is located below the first threaded rod, and the length of the second threaded rod is longer than the length of the first threaded rod. The first threaded rod and the second threaded rod determine the position of the limiting plate.

[0013] Preferably, the limiting plate is movably connected to the right end of the spiral extrusion blade. The dehydration shell and the limiting plate determine the position of the spiral extrusion blade, which facilitates the disassembly and replacement of the spiral extrusion blade and protects the safety of the spiral extrusion blade.

[0014] Preferably, the feeding plate is movably connected to the right end of the spiral extrusion blade, and the spiral extrusion blade moves at the top of the feeding plate to facilitate the transport of gypsum filter cake.

[0015] Compared with the prior art, the beneficial effects of this utility model are: In this electrolytic aluminum desulfurization gypsum filter cake recovery system, the gypsum filter cake is fed into the drying drum after moisture accumulation. Through heat transfer, the surrounding air is heated into hot air. As the drying drum rotates, the gypsum rotates upward with the turning plate and then slides down to form a material curtain. It comes into full contact with the surrounding hot air to dry the gypsum. The dried gypsum filter cake is then ground into gypsum powder with a lower density for reuse. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the gypsum filter cake recovery system of this utility model; Figure 2 This is a three-dimensional schematic diagram of the spiral dehydration device of this utility model; Figure 3 This is a three-dimensional schematic diagram of the support component and the feeding plate of this utility model; Figure 4 This is a three-dimensional schematic diagram of the filter plate of this utility model.

[0017] In the diagram: 1. Spiral dewatering device; 11. Dewatering shell; 12. Feed pipe; 13. Support assembly; 131. Support frame; 132. Water collection tank; 133. Limiting plate; 134. Threaded rod one; 135. Threaded rod two; 14. Spiral extrusion blade; 15. Feeding plate one; 16. Filter plate; 2. Belt conveyor; 3. Drum drying device; 31. Exhaust pipe; 32. Drying drum; 33. Hot air blower; 34. Feeding plate two; 4. Extrusion and refining device; 5. Hopper. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 The present invention provides the following technical solution: The electrolytic aluminum desulfurization gypsum filter cake recovery system includes a spiral dewatering device 1 and a belt conveyor 2. A drum drying device 3 is installed at the feeding point at the top of the belt conveyor 2. An extrusion and refining device 4 is installed at the discharge point of the drum drying device 3. A hopper 5 is installed at the discharge point of the extrusion and refining device 4. The belt conveyor 2 is located at the discharge point of the spiral dewatering device 1.

[0020] The spiral dewatering device 1 includes a dewatering shell 11. A feed pipe 12 is welded to the left side of the top surface of the dewatering shell 11. A spiral extrusion blade 14 is installed inside the dewatering shell 11. A support assembly 13 is installed on the bottom surface of the dewatering shell 11. A feed plate 15 is bolted to the right side surface of the dewatering shell 11. The feed plate 15 is movably connected to the right end of the spiral extrusion blade 14. The spiral extrusion blade 14 moves on the top of the feed plate 15 to facilitate the transport of gypsum filter cake. A filter plate 16 is bolted to the bottom surface of the dewatering shell 11.

[0021] The rotary drum drying device 3 includes a drying drum 32. An air duct 31 is bolted to the left end of the drying drum 32, a hot air blower 33 is bolted to the right end of the drying drum 32, and a feed plate 34 is bolted to the lower right end of the drying drum 32.

[0022] The support assembly 13 includes a support frame 131, and the dehydration shell 11 is installed on top of the support frame 131. The support frame 131 determines the position of the dehydration shell 11 and the filter plate 16. The filter plate 16 performs filtration of the water inside the dehydration shell 11.

[0023] A water collection tank 132 is installed on the inner wall surface of the support frame 131, and a threaded rod 135 is fixedly connected to the top right surface of the support frame 131.

[0024] The right end of the threaded rod 135 is threadedly connected to a limiting plate 133. The limiting plate 133 is movably connected to the right end of the spiral extrusion blade 14. The dewatering housing 11 and the limiting plate 133 determine the position of the spiral extrusion blade 14, making it convenient to disassemble and replace the spiral extrusion blade 14 and protecting the safety of the spiral extrusion blade 14.

[0025] The top of the limiting plate 133 is threadedly connected to a threaded rod 134, and a threaded rod 135 is located below the threaded rod 134. The length of the threaded rod 135 is longer than the length of the threaded rod 134. The threaded rods 134 and 135 determine the position of the limiting plate 133. The threaded rod 134 is welded to the top of the unloading plate 15. The threaded rods 134 and 135 lock and fix the limiting plate 133, thus determining the position of the limiting plate 133 and facilitating its disassembly and replacement.

[0026] In use, the gypsum filter cake is fed into the dewatering shell 11 through the feed pipe 12, and then the screw extrusion blade 14 is activated. The screw extrusion blade 14 and the dewatering shell 11 can extrude the gypsum filter cake.

[0027] The spiral extrusion blade 14 drives the gypsum filter cake to move inside the dewatering shell 11, and the extruded gypsum filter cake falls onto the belt conveyor 2.

[0028] The belt conveyor 2 transports the gypsum filter cake to the drum dryer 3. The drum dryer 3 includes a frame, a drying drum 32, a drive unit, and a drying unit. The frame is set on the ground, and the drying drum 32 is rotatably mounted on the frame. The axis of the drying drum 32 is set at an inclination.

[0029] The drive unit is mounted on the frame and drives the drying drum 32 to rotate. The drying drum 32 is equipped with a tilting plate, which drives the gypsum to rotate in the drum. The drying drum 32 itself has a certain inclination, which drives the gypsum in the drying drum 32 to move from one end of the drying drum 32 to the other end. During this process, the gypsum gradually disperses to form a material curtain.

[0030] Hot air is introduced into the drying drum 32 by the hot air blower 33 to dry the gypsum in the drying drum 32, and then the dried gypsum is discharged. The drying of the gypsum in the drying drum 32 is carried out at one end of the drying drum 32.

[0031] The hot air blower 33 generates heat through a heat source, and heats the surrounding air into hot air through heat transfer. As the drying drum 32 rotates, the gypsum rotates upward with the flip plate and then slides down to form a material curtain, which fully contacts the surrounding hot air to dry the gypsum.

[0032] The hot air blower 33 is installed at the lower end of the drying drum 32, and the suction fan is set at the higher end. The drying device is divided into an internal burner and an external burner. The suction fan draws external hot air into the drying drum 32 to dry the gypsum rotating inside.

[0033] The dried gypsum filter cake is fed into the extrusion and refining device 4 for grinding into gypsum powder with a lower density for reuse.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrolytic aluminum desulfurization gypsum filter cake recovery system, comprising a spiral dewatering device (1) and a belt conveyor (2), characterized in that: The belt conveyor (2) is equipped with a drum drying device (3) at the top of the feeding point, and a pressing and refining device (4) is equipped at the discharge point of the drum drying device (3). A hopper (5) is equipped at the discharge point of the pressing and refining device (4). The belt conveyor (2) is located at the discharge point of the spiral dewatering device (1). The spiral dewatering device (1) includes a dewatering shell (11), a feed pipe (12) is welded to the left side of the top surface of the dewatering shell (11), a spiral extrusion blade (14) is installed inside the dewatering shell (11), a support assembly (13) is installed on the bottom surface of the dewatering shell (11), a feed plate (15) is bolted to the right side surface of the dewatering shell (11), and a filter plate (16) is bolted to the bottom surface of the dewatering shell (11). The drum drying device (3) includes a drying drum (32), with an air duct (31) bolted to the left end of the drying drum (32), a hot air blower (33) bolted to the right end of the drying drum (32), and a feed plate (34) bolted to the lower right end of the drying drum (32).

2. The electrolytic aluminum desulfurization gypsum filter cake recovery system according to claim 1, characterized in that: The support assembly (13) includes a support frame (131), a water collection tank (132) is installed on the inner wall surface of the support frame (131), a threaded rod two (135) is fixedly connected to the top right surface of the support frame (131), a limit plate (133) is threadedly connected to the right end of the threaded rod two (135), and a threaded rod one (134) is threadedly connected to the top of the limit plate (133).

3. The electrolytic aluminum desulfurization gypsum filter cake recovery system according to claim 2, characterized in that: The threaded rod (134) is welded to the top of the blanking plate (15).

4. The electrolytic aluminum desulfurization gypsum filter cake recovery system according to claim 3, characterized in that: The dehydration shell (11) is mounted on top of the support frame (131).

5. The electrolytic aluminum desulfurization gypsum filter cake recovery system according to claim 4, characterized in that: The second threaded rod (135) is located below the first threaded rod (134).

6. The electrolytic aluminum desulfurization gypsum filter cake recovery system according to claim 5, characterized in that: The limiting plate (133) is movably connected to the right end of the spiral extrusion blade (14).

7. The electrolytic aluminum desulfurization gypsum filter cake recovery system according to claim 6, characterized in that: The feed plate (15) is movably connected to the right end of the spiral extrusion blade (14).

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