Alkali residue slurry crushing, flushing and stirring system

Abstract

The utility model discloses an alkaline residue slurry crushing, washing and stirring system which comprises an alkaline residue filtering device for filtering alkaline residues, a crushing and backwashing system for crushing the alkaline residues and a slurry stirring system for stirring slurry in a slurry tank, the alkaline residue filtering device is positioned below a slurry feeding hole in the slurry tank, and the crushing and backwashing system is positioned below the slurry feeding hole in the slurry tank. The crushing and backwashing system is arranged at the downstream of the alkaline residue filtering device, one side of the alkaline residue filtering device is provided with an alkaline residue slurry precipitation tank, the alkaline residue slurry precipitation tank is communicated with a residue slurry pool below the alkaline residue filtering device through a supernatant feed port, and the alkaline residue slurry precipitation tank is communicated with the crushing and backwashing system. The utility model effectively solves the problems of large feeding granularity and many hardened blocks of the alkaline residue slurry, easy adhesion and blockage of the traditional crusher and the like, is suitable for the treatment process of alkaline residues with different properties in different areas, and is high in construction efficiency, economical and practical.

Description

Technical Field

[0001] The utility model relates to an alkali slag slurry crushing, flushing and stirring system, belonging to the field of alkali slag resource utilization. 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, 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 into the slurry pool for subsequent desalination treatment by a suction ship. Due to the long-term storage of alkali slag, the pumped alkali slag slurry contains alkali slag blocks and agglomerates, which do not meet the process particle size requirement of ≤5mm and cannot meet the engineering needs of large-scale alkali slag treatment production on site.

[0004] The crusher can be used to 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.

[0005] In view of the above situation, a certain alkali slag treatment project uses conventional mechanical crushing equipment, which easily causes blockage of the stirring teeth and the feed port, greatly affecting the slag feed amount and unable to meet the large-scale and long-term alkali slag feed requirements. Summary of the invention

[0006] The problem to be solved by the utility model is: to provide an alkali slag slurry crushing, flushing and stirring system for alkali slag feed with large particle size, and at the same time to solve the problem that in the alkali slag slurry feeding process of the traditional mechanical crushing device, the stirring teeth are wrapped and blocked due to the viscosity of the alkali slag, affecting the feeding efficiency.

[0007] In order to solve the above problems, the utility model provides the following technical solutions:

[0008] A alkali-slag slurry crushing, flushing and stirring system comprises an alkali-slag filtering device for filtering alkali slag, a crushing backwashing system for crushing alkali slag and a slurry stirring system for stirring slurry in a slurry pool, wherein the alkali-slag filtering device is located below a slurry feed port in the slurry pool, the crushing backwashing system is located downstream of the alkali-slag filtering device, an alkali-slag slurry sedimentation tank is provided on one side of the alkali-slag filtering device, the alkali-slag slurry sedimentation tank is connected to the slurry pool below the alkali-slag filtering device through a supernatant feed port, and the alkali-slag slurry sedimentation tank is connected to the crushing backwashing system.

[0009] Preferably, the alkali residue filtering device comprises a filter screen, which is arranged obliquely, and a crushing backwashing system is provided below the lower side of the filter screen.

[0010] More preferably, the pore size of the filter is 2 to 10 mm, and the inclination angle with the horizontal plane is 30° to 60°.

[0011] Preferably, the crushing backwashing system includes an alkali slag crushing device with a spiral stirring shaft and a high-pressure flushing port and a brush for flushing the spiral stirring shaft. The spiral stirring shaft is provided with crushing teeth, and the high-pressure flushing port is connected to the crushing backwashing system. After the slurry is fed, the fine-grained slurry can fall into the lower end slurry pool through the filter screen with the water pressure, and the coarse-grained alkali slag blocks and agglomerates roll into the alkali slag crushing device. At the same time, the water source of the backwashing device comes from the supernatant of the slurry sedimentation in the slurry pool, which avoids the reduction of the solid content of the slurry by the new water source. The spiral stirring shaft cross-crushes the alkali slag and agglomerates to achieve the purpose of reducing the particle size of the alkali slag slurry feed. The alkali slag crushing device is arranged in the slurry pool and is connected to it. After the alkali slag is crushed, it can directly fall into the slurry pool to meet the on-site process alkali slag use requirements.

[0012] More preferably, the high-pressure flushing ports are evenly arranged along the axial direction of the spiral stirring shaft.

[0013] Furthermore, the spacing between adjacent high-pressure flushing ports is 30-80 mm, and the water pressure of the high-pressure flushing ports is 0.2-0.4 Mpa. The flushing ports are aligned with the stirring teeth of the crushing device to prevent the alkaline slag slurry from wrapping around the stirring teeth and blocking the feed port.

[0014] Preferably, a slurry pushing flow device for pushing the slurry into the slurry pool is provided below the alkali slag filtering device.

[0015] Preferably, the slurry stirring system comprises a plurality of vertical stirrers evenly distributed in the slurry pool.

[0016] Preferably, the impeller diameter of the vertical agitator is 3-4 m, which can push the slurry evenly to all parts of the pool on the one hand, and prevent the slurry solids from settling and affecting the solid content on the other hand.

[0017] The utility model provides an alkali slag slurry crushing, flushing and stirring system, which effectively solves the problems of large particle size of alkali slag slurry feed, many agglomerates, easy adhesion and clogging of traditional crushers, etc., and is suitable for alkali slag treatment processes of different properties in different regions, with high construction efficiency, economy and practicality. The alkali slag slurry achieves the purpose of crushing blocky alkali slag through the alkali slag filtering device, crushing backwashing system and slurry stirring system, and can be constructed continuously. In addition, the flushing water used in the utility model comes from the supernatant of the alkali slag slurry water, avoiding waste of resources.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0019] (1) The utility model adopts a crushing backwashing system, which can effectively solve the problems of excessive alkali slag particle size during alkali slag slurry feeding, and alkali slag blocks and plate agglomerations causing feed blockage;

[0020] (2) The utility model adopts a slurry filtering device, and the alkali slag slurry with smaller particle size directly enters the slurry pool through the filter screen, avoiding the slurry flow being too large to block the feed port. At the same time, the filter screen is set with a certain inclination, and the large-size alkali slag blocks and plate blocks can roll along the filter screen into the crusher to play a role in crushing;

[0021] (3) The utility model adopts a high-pressure backwashing device, and uses the supernatant of the alkali slag slurry to wash the stirring teeth, which can effectively avoid the deposition and blockage caused by the adhesion of the alkali slag slurry in the stirring teeth. At the same time, the supernatant in the slurry pool is used to avoid the injection of new water to affect the solid content in the pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A top view of the alkaline slag slurry crushing, flushing and stirring system provided by the utility model;

[0023] Figure 2 This is the front view of the alkali residue filtering device and the crushing backwashing system;

[0024] Figure 3 for Figure 2 Side view of

[0025] Figure 4 for Figure 2 Top view of the . DETAILED DESCRIPTION

[0026] 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.

[0027] Example

[0028] like Figure 1-4 As shown, an alkali-slag slurry crushing, flushing and stirring system provided by the utility model includes an alkali-slag filtering device 2 for filtering alkali slag, a crushing backwashing system 3 for crushing alkali slag and a slurry stirring system for stirring the slurry in the slurry pool 1, the alkali-slag filtering device 2 is located below the slurry feed port in the slurry pool 1, the crushing backwashing system 3 is arranged downstream of the alkali-slag filtering device 2, an alkali-slag slurry precipitation tank 5 is provided on one side of the alkali-slag filtering device 2, the alkali-slag slurry precipitation tank 5 is connected with the slurry pool 1 below the alkali-slag filtering device 2 through the supernatant feed port 11, and the alkali-slag slurry precipitation tank 5 is connected with the crushing backwashing system 3.

[0029] The alkaline residue filtering device 2 comprises a filter screen 6, which is tilted, and a crushing backwashing system 3 is arranged below the lower side of the filter screen 6. The pore size of the filter screen 6 is 2-10 mm, and the tilt angle with the horizontal plane is 30°-60°.

[0030] The crushing backwashing system 3 includes an alkali slag crushing device 7 with a spiral stirring shaft, a high-pressure flushing port 8 and a brush 9 for flushing the spiral stirring shaft, the spiral stirring shaft is provided with crushing teeth, and the high-pressure flushing port 8 is connected to the crushing backwashing system 3. The high-pressure flushing ports 8 are evenly arranged along the axial direction of the spiral stirring shaft, and the interval between adjacent high-pressure flushing ports 8 is 30 to 80 mm; the water pressure of the high-pressure flushing port 8 is 0.2 to 0.4 Mpa.

[0031] A slurry pushing device 10 for pushing the alkali slag slurry into the slurry pool 1 is provided below the alkali slag filtering device 2 .

[0032] The slurry stirring system comprises a plurality of vertical stirrers 4 evenly distributed in the slurry pool 1. The impeller diameter of the vertical stirrer 4 is 3-4 m.

[0033] The slurry is pumped into the slurry pool 1, and falls onto the alkali residue filtering device 2 through the feed pipe. The fine alkali residue slurry that meets the demand passes through the filter screen 6. A flow-pushing device 10 is provided below the filter screen 6 to push the alkali residue slurry that falls below into the slurry pool 1 to prevent the alkali residue from accumulating at the bottom of the pool. A crushing backwashing system 3 is provided at the end of the filter screen 6, and the blocky alkali residue and the plate agglomerate roll down into the crushing backwashing system 3.

[0034] The alkali slag crushing device 7 cuts and crushes the blocky alkali slag and the agglomerates, and the slurry falls into the slurry pool 1 after crushing. The brush 9 is arranged at one end of the alkali slag crushing device 7 to prevent the slurry from blocking the crushing feed port during the cutting and crushing process of the alkali slag crushing device 7. The high-pressure flushing port 8 is aligned with the crushing teeth of the alkali slag crushing device 7, and the water pressure is 0.2-0.4Mpa to prevent the slurry from wrapping around the stirring teeth and then blocking the feed port. At the same time, the water source of the high-pressure flushing port 8 comes from the supernatant of the slurry sedimentation in the slurry pool 1. The slurry enters the slurry sedimentation tank 5 through the supernatant feed port 11, and the supernatant is pumped to the high-pressure flushing port [8], which prevents the new water source from reducing the solid content of the slurry in the slurry pool 1.

[0035] The crushed slurry and the filtered slurry are pushed into the slurry pool 1 through the flow-pushing device 10. The slurry pool 1 is provided with a slurry stirring system, which includes multiple sets of vertical stirring equipment 4 with an impeller diameter of 3 to 4 m. On the one hand, the slurry can be evenly pushed to all parts of the pool, and on the other hand, the slurry solids are prevented from settling and affecting the solid content.

Claims

1. A alkali slag slurry crushing, flushing and stirring system, characterized in that: The invention comprises an alkali residue filtering device (2) for filtering alkali residue, a crushing backwashing system (3) for crushing alkali residue, and a slurry stirring system for stirring slurry in a slurry pool (1), wherein the alkali residue filtering device (2) is located below a slurry feed port in the slurry pool (1), the crushing backwashing system (3) is located downstream of the alkali residue filtering device (2), an alkali residue slurry precipitation tank (5) is provided on one side of the alkali residue filtering device (2), the alkali residue slurry precipitation tank (5) is connected to the slurry pool (1) below the alkali residue filtering device (2) through a supernatant feed port (11), and the alkali residue slurry precipitation tank (5) is connected to the crushing backwashing system (3).

2. The alkali-slag slurry crushing, flushing and stirring system according to claim 1, characterized in that: The alkali residue filtering device (2) comprises a filter screen (6), the filter screen (6) is arranged obliquely, and a crushing backwashing system (3) is arranged below the lower side of the filter screen (6).

3. The alkali-slag slurry crushing, flushing and stirring system according to claim 2, characterized in that: The pore size of the filter (6) is 2 to 10 mm, and the inclination angle with the horizontal plane is 30° to 60°.

4. The alkali-slag slurry crushing, flushing and stirring system according to claim 1, characterized in that: The crushing backwashing system (3) comprises an alkali slag crushing device (7) with a spiral stirring shaft, and a high-pressure flushing port (8) and a brush (9) for flushing the spiral stirring shaft. The spiral stirring shaft is provided with crushing teeth, and the high-pressure flushing port (8) is connected to the crushing backwashing system (3).

5. The alkali-slag slurry crushing, flushing and stirring system according to claim 4, characterized in that: The high-pressure flushing ports (8) are evenly arranged along the axial direction of the spiral stirring shaft.

6. The alkali-slag slurry crushing, flushing and stirring system according to claim 5, characterized in that: The spacing between adjacent high-pressure flushing ports (8) is 30 to 80 mm; the water pressure of the high-pressure flushing ports (8) is 0.2 to 0.4 Mpa.

7. The alkali-slag slurry crushing, flushing and stirring system according to claim 1, characterized in that: A slurry flow pushing device (10) for pushing the slurry into the slurry pool (1) is provided below the alkali slag filtering device (2).

8. The alkali-slag slurry crushing, flushing and stirring system according to claim 1, characterized in that: The slurry stirring system comprises a plurality of vertical stirrers (4) uniformly distributed in the slurry pool (1).

9. The alkali-slag slurry crushing, flushing and stirring system according to claim 8, characterized in that: The impeller diameter of the vertical stirrer (4) is 3 to 4 m.

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