Alkali residue slurry crushing device

Abstract

The utility model discloses an alkaline residue slurry crushing device, which comprises a front-end stirring and crushing device, a plurality of variable-frequency and variable-speed motors, and a plurality of stirring and crushing devices, wherein the output end of each variable-frequency and variable-speed motor is connected with a spiral blade through a knife rest bearing; the rear end crushing device comprises a box body, a grinding tool bit is arranged in the box body, and a high-pressure nozzle is arranged in the box body; the screening device comprises a rotary screen used for communicating the bottom of the steel frame with the top of the box body, holes are uniformly distributed in the rotary screen, and a high-pressure spray head used for removing slag slurry particles adhered to the holes is arranged on the rotary screen; a screw conveyor; and an integrated control device. The utility model effectively solves the problem that the crushing device is adaptive to the alkaline residue treatment process, and fills the blank in the field of alkaline residue crushing devices; meanwhile, the problem that the equipment operation and maintenance cost is too high due to corrosion of the alkaline residues can be effectively solved, and the economical efficiency is high; an automatic control system is adopted, long-time continuous operation capacity is achieved, unattended operation can be achieved, and the requirement for large-scale treatment is met.

Description

Technical Field

[0001] The utility model relates to an alkali slag slurry crushing device, belonging to the technical field of alkali slag treatment equipment. Background Art

[0002] Alkali slag refers to the alkaline waste residue produced during the industrial alkali production and alkali treatment process of the ammonia-soda process, also known as white mud.

[0003] At present, large-scale alkali slag treatment is mainly carried out through the desalination and solidification treatment method. The alkali slag slurry in the alkali slag dam is pumped by a suction dredger to the subsequent treatment process for desalination. Due to the long-term storage of alkali slag, the pumped alkali slag slurry contains alkali slag blocks and agglomerates. The large-particle alkali slag slurry will lead to reduced process efficiency and easily cause equipment blockage.

[0004] Conventional crushers can effectively break up the lumps in the alkali slag, but due to the high viscosity of the alkali slag and the fast pumping flow rate, the alkali slag in the crusher is easily adhered and blocked, which is not conducive to large-scale application and has low efficiency.

[0005] At present, there is little research on the existing technology of slurry treatment of slag pumped by suction dredgers. The front-end treatment equipment of alkali slag slurry can usually refer to the sorting process equipment used in mine beneficiation. However, such equipment is not designed for alkali slag dehydration and solid salt treatment process, and cannot effectively deal with the high viscosity of alkali slag, fast pumping flow rate, and strong corrosiveness, which can easily cause adhesion, blockage and corrosion of crusher alkali slag, which is not conducive to large-scale application. Utility Model Content

[0006] The technical problem to be solved by the utility model is that the particle size of the alkali slag slurry is too large, which easily causes the alkali slag adhesion and clogging of the crusher.

[0007] In order to solve the above problems, the utility model provides an alkali residue slurry crushing device, which comprises:

[0008] The front-end mixing and crushing device includes a plurality of variable frequency speed regulating motors. The output end of each variable frequency speed regulating motor is connected to a spiral blade through a knife holder bearing. The blade head is arranged in a steel frame.

[0009] The rear end crushing device comprises a box body, in which a grinding cutter head and a high-pressure nozzle are arranged, and the high-pressure nozzle is symmetrically arranged above the grinding cutter head;

[0010] Screening device, a rotary screen for connecting the bottom of the steel frame with the top of the box, the rotary screen is evenly distributed with holes, and the rotary screen is provided with a high-pressure nozzle for removing slurry particles adhering to the holes;

[0011] The screw conveyor is installed inside the box and above the grinding cutter head;

[0012] The integrated control device is used to control the front-end mixing and crushing device, the screening device, and the rear-end crushing device.

[0013] Preferably, the steel frame is a rectangular parallelepiped structure with an upper opening, and circular holes are evenly distributed on the steel frame, and the hole diameter is set according to the maximum alkali slag particle size that the treatment process can withstand.

[0014] Preferably, the rotary screen is arranged to be tilted downward along the direction of internal material movement, and the tilt angle and the length of the screen body are reasonably determined according to the spatial layout of the process facility pipelines; the aperture of the holes is set according to the maximum particle size allowed by the process, and the aperture of the high-pressure nozzle and the amount of water used are determined according to the process treatment scale and the solid content of the alkali slag.

[0015] Preferably, the high-pressure nozzle is located above the rotating screen and arranged axially along the rotating screen.

[0016] Preferably, two rows of grinding heads are provided in the box, and the gap between the heads is set according to the maximum particle size allowed by the process. The aperture and water consumption of the high-pressure nozzle are determined according to the process processing scale and the solid content of the alkali slag.

[0017] Preferably, the above-mentioned alkali slag slurry crushing device also includes a water intake device, which includes a water storage tank, the top of the water storage tank is connected to the water source through an HDPE pipe, and the bottom of the water storage tank is connected to the high-pressure nozzle through a water intake motor.

[0018] Preferably, the screw conveyor includes a reduction motor, a screw and a screw conveying pipe; the screw is connected to the output end of the reduction motor, and the screw is arranged in the screw conveying pipe; the screw is arranged above the grinding cutter head and keeps a certain distance from the grinding cutter head, and the length of the screw is determined according to the layout of the process equipment.

[0019] The integrated control device can realize intelligent control, including control functions such as forward and reverse rotation of equipment, intelligent start and stop, and operation status feedback.

[0020] The utility model effectively solves the problem of adapting the crushing device to the alkali slag treatment process, filling the gap in the field of alkali slag crushing devices; at the same time, it can effectively solve the problem of excessively high equipment operation and maintenance costs caused by the corrosiveness of the alkali slag, and has strong economy; the utility model adopts an automatic control system, has the ability to operate continuously for a long time, can be unmanned, and meets the requirements of large-scale processing.

[0021] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0022] 1. The utility model can realize the particle size control of alkali slag slurry according to the alkali slag treatment process, filling the blank of research in this field;

[0023] 2. Compared with the prior art, the utility model solves the problem of discontinuous operation of equipment caused by the viscosity of alkali slag slurry, and has high processing efficiency;

[0024] 3. Compared with the prior art, the utility model solves the problem of frequent equipment operation and maintenance caused by the corrosiveness of alkali slag slurry, and the cost is low;

[0025] 4. The utility model is more perfect than the existing technology, can realize intelligent control, and has strong expansibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of the alkaline slag slurry crushing device provided by the utility model;

[0027] Figure 2 It is a structural schematic diagram of the water intake device;

[0028] Figure 3 It is a structural diagram of the screw conveyor. DETAILED DESCRIPTION

[0029] In order to make the present invention more obvious and easy to understand, preferred embodiments are described in detail as follows in conjunction with the accompanying drawings.

[0030] Example

[0031] like Figure 1-3 As shown, a alkali slag slurry crushing device provided by the utility model comprises:

[0032] The front end mixing and crushing device 1 comprises a plurality of variable frequency speed regulating motors 11, the output end of each variable frequency speed regulating motor 11 is connected to a spiral blade 12 through a blade holder bearing 13, and the blade head of the blade 12 is disposed in a steel frame 14;

[0033] The rear end crushing device 3 comprises a box body 31, in which a grinding cutter head 32 and a high pressure nozzle 33 are arranged, and the high pressure nozzle 33 is symmetrically arranged above the grinding cutter head 32;

[0034] The screening device 2 is a rotary screen 21 for connecting the bottom of the steel frame 14 with the top of the box 31, the rotary screen 21 is evenly distributed with holes 211, and the rotary screen 21 is provided with a high-pressure nozzle 22 for removing slurry particles adhering to the holes 211;

[0035] The screw conveyor 4 is arranged inside the box 31 and above the grinding cutter head 32;

[0036] The integrated control device 5 is used to control the front-end stirring and crushing device 1, the screening device 2, and the rear-end crushing device 3;

[0037] Water intake device 6( Figure 2As shown), it includes a water storage tank 62, the top of the water storage tank 62 is connected to the water source through an HDPE pipe 61, and the bottom of the water storage tank 62 is connected to the high-pressure nozzle 33 through a water intake motor 63.

[0038] The steel frame 14 is a rectangular parallelepiped structure with an opening at the top. Round holes 141 are evenly distributed on the steel frame 14 , and the hole diameter is set according to the maximum alkali slag particle size that the treatment process can withstand.

[0039] The rotary screen 21 is arranged to be tilted downward along the direction of internal material movement, and the tilt angle and the length of the screen body are reasonably determined according to the spatial layout of the process facility pipeline; the aperture of the hole 211 is set according to the maximum particle size allowed by the process, and the aperture and water consumption of the high-pressure nozzle 22 are determined according to the process processing scale and the solid content of the alkali slag.

[0040] The high-pressure nozzle 22 is located above the rotating screen 21 and arranged along the axial direction of the rotating screen 21 .

[0041] Two rows of grinding heads 32 are arranged in the box body 31, and the gap between the heads is set according to the maximum particle size allowed by the process. The aperture and water consumption of the high-pressure nozzle 33 are determined according to the process processing scale and the solid content of the alkali slag.

[0042] The screw conveyor 4 includes a reduction motor 41, a screw 42 and a screw conveying pipe 43; the screw 42 is connected to the output end of the reduction motor 41, and the screw 42 is arranged in the screw conveying pipe 43; the screw 42 is arranged above the grinding head 32, keeping a certain distance from the grinding head, and the length of the screw is determined according to the layout of the process equipment.

[0043] The integrated control device can realize intelligent control, including control functions such as forward and reverse rotation of equipment, intelligent start and stop, and operation status feedback.

[0044] Furthermore, the blade material of the front-end stirring and crushing device is ordinary steel, which only needs to ensure a certain hardness to reduce costs.

[0045] Furthermore, the steel frame is a rectangular parallelepiped structure with an upper opening, and circular holes are evenly arranged, and the hole diameter is set according to the maximum alkali slag particle size that the treatment process can withstand.

[0046] Furthermore, the variable frequency speed regulating motor is for outdoor use, has a protection grade of IP65, and is provided with a rainproof cap.

[0047] Furthermore, after the alkali slag slurry enters the front-end stirring and crushing device, the large pieces of alkali slag are broken up under the cutting action of the blade, and the slurry overflows through the openings of the steel frame to the treatment process temporary storage tank, and the remaining blocky alkali slag is piled up at the bottom of the frame.

[0048] Furthermore, the rotary screen is arranged tilted, with an inclination angle of 30-60 degrees, a screen length of not less than 4 meters, and a rotation speed of 20-30 rpm.

[0049] Furthermore, the hole diameter is set according to the maximum particle size allowed by the process. In order to ensure the flow capacity of the rotary screen, the hole diameter should not be set too small. The filter mesh diameter should be 5 to 10 mm; the number of holes should be calculated based on the flow rate.

[0050] Furthermore, the setting of high-pressure nozzles needs to consider the flushing effect of the sieve holes. The nozzle setting spacing should not be too large, and the setting interval is 50 to 80 mm. The nozzle pressure is 0.2 to 0.4 MPa.

[0051] Furthermore, the large-particle alkali slag deposited at the front end enters the rotary screen under the dual action of hydraulic power and gravity, the small-particle alkali slag and most of the water directly enter the process treatment temporary storage tank through the sieve holes, and the remaining large-particle alkali slag and a small amount of water enter the subsequent device.

[0052] Furthermore, the grinding heads are arranged in double rows, and the gap between the heads is set according to the maximum particle size allowed by the process, which is usually 5 to 10 mm.

[0053] Furthermore, the cutter head material is selected from 316L stainless steel, considering certain rigidity and corrosion resistance.

[0054] Furthermore, an observation window is provided outside the crushing device to prevent alkali slag from splashing; the observation window can be opened to facilitate subsequent operation and maintenance.

[0055] Furthermore, the aperture and water consumption of the high-pressure nozzle are determined according to the process treatment scale and the solid content of the alkali slag. The nozzle pressure is 0.2-0.4Mpa and is evenly arranged around the crushing device.

[0056] Furthermore, the water intake device can take water from the nearest process temporary storage tank to save water; however, the water quality must be considered to avoid impurities clogging the nozzle.

[0057] Furthermore, antifreeze measures should be taken for water storage tanks and HDPE pipes to prevent damage from low temperatures.

[0058] Furthermore, the spiral is arranged in the spiral conveying pipe, arranged above the grinding cutter head, and keeps a certain distance from the grinding cutter head, and the distance is controlled at 20-30 mm.

[0059] Furthermore, the outer diameter of the bolt is reasonably determined according to the diameter of the alkali slag block, and the spiral diameter is not less than φ190;

[0060] The length of the spiral is determined according to the layout of the process equipment, and the length can ensure that the transported material reaches the designated area.

[0061] Furthermore, the integrated control device can realize intelligent control, including control functions such as forward and reverse rotation of equipment, intelligent start and stop, and operating status feedback.

Claims

1. A caustic slag slurry crushing device, characterized in that: include: The front end stirring and crushing device (1) comprises a plurality of variable frequency speed regulating motors (11), the output end of each variable frequency speed regulating motor (11) is connected to a spiral blade (12) through a blade holder bearing (13), and the blade head of the blade (12) is disposed in a steel frame (14); The rear end crushing device (3) comprises a box (31), wherein a grinding cutter head (32) and a high-pressure nozzle (33) are arranged in the box (31), and the high-pressure nozzle (33) is symmetrically arranged above the grinding cutter head (32); A screening device (2), a rotary screen (21) for connecting the bottom of the steel frame (14) with the top of the box (31), the rotary screen (21) being evenly distributed with holes (211), and a high-pressure nozzle (22) for removing slurry particles adhering to the holes (211); A screw conveyor (4) is arranged inside the box (31) and above the grinding cutter head (32); The integrated control device (5) is used to control the front-end stirring and crushing device (1), the screening device (2), and the rear-end crushing device (3).

2. The alkali slag slurry crushing device according to claim 1, characterized in that: The steel frame (14) is a rectangular parallelepiped structure with an upper opening, and circular holes (141) are evenly distributed on the steel frame (14).

3. The alkali slag slurry crushing device according to claim 1, characterized in that: The rotary screen (21) is arranged to be tilted downward along the moving direction of the internal material.

4. The alkali slag slurry crushing device according to claim 1, characterized in that: The high-pressure nozzle (22) is located above the rotating screen (21) and is arranged axially along the rotating screen (21).

5. The alkali slag slurry crushing device according to claim 1, characterized in that: Two rows of grinding heads (32) are arranged in the box (31).

6. The alkali slag slurry crushing device according to claim 1, characterized in that: It also includes a water intake device (6), which includes a water storage tank (62). The top of the water storage tank (62) is connected to a water source via an HDPE pipe (61), and the bottom of the water storage tank (62) is connected to a high-pressure nozzle (33) via a water intake motor (63).

7. The alkali slag slurry crushing device according to claim 1, characterized in that: The screw conveyor (4) comprises a reduction motor (41), a screw (42) and a screw conveying pipe (43); the screw (42) is arranged in the screw conveying pipe (43); the screw (42) is arranged above the grinding cutter head (32).

Images