Coal slurry water concentration system

Abstract

The present application relates to coal slime water concentration technical field, particularly to a kind of coal slime water concentration system, including dosing device and thickener, dosing device includes first helical blade fixedly arranged on the inner wall of the feed pipe of thickener;First helical blade is hollowly arranged;First helical blade is provided with outlet;First helical blade is provided with inlet pipe.Compared with prior art, when using, inlet pipe is connected with flocculating agent, then outlet is flowed out in feed pipe and mixed with coal slime water, coal slime water is guided under the guidance of first helical blade and forms cyclone, and the flow of coal slime water in feed pipe is lengthened, so that coal slime water and flocculating agent are fully mixed.

Description

Technical Field

[0001] This invention relates to the field of coal slurry water concentration technology, and in particular to a coal slurry water concentration system. Background Technology

[0002] A thickener is a device that continuously thickens coal slurry by utilizing the flocculation and sedimentation of solid particles. It consists of a sedimentation tank for coal slurry and an underflow discharge system that collects the sediment and discharges it through a bottom outlet. The coal slurry is fed into the thickener from the top center, the clarified overflow flows from the periphery of the tank into an overflow trough, and the settled product (underflow) is pumped out from the bottom outlet at the bottom of the conical bottom of the tank.

[0003] In coal slurry water treatment processes, achieving efficient mixing of coal slurry water and flocculant aqueous solution is a prerequisite for efficient concentration treatment of coal slurry water. In traditional processes, the flocculant aqueous solution is typically added to a pipe or chute before the thickener inlet. The coal slurry water and the flocculant mix through the pipe flow, resulting in a short reaction time and insufficient mixing. Furthermore, the thickener only performs the subsequent concentration function and lacks the ability to mix the flocculant and coal slurry water, ultimately leading to high flocculant consumption and poor sedimentation.

[0004] Existing thickeners have been extensively studied in terms of transmission devices and machine structure, but there has been little innovation in feed design. Ensuring thorough and uniform mixing of reagents and coal slurry, and reducing the degree of turbulence within the thickener, has become a research hotspot in this field in recent years. Summary of the Invention

[0005] To address the problem that adding flocculant aqueous solution directly into the pipe or chute before the feed inlet of the current thickener results in insufficient and uneven mixing of the agent and coal slurry water, this invention provides a coal slurry water thickening system.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows: A coal slurry water thickening system includes a dosing device and a thickener. The dosing device includes a first spiral blade fixedly mounted on the inner wall of the thickener's feed pipe; the first spiral blade is hollow; a dosing outlet is provided on the first spiral blade; and a dosing inlet pipe is provided on the first spiral blade. In use, flocculant is introduced into the dosing inlet pipe and then flows out from the dosing outlet, mixing with the coal slurry water in the feed pipe. Guided by the first spiral blade, the coal slurry water forms a swirling flow, prolonging its flow path within the feed pipe, thus ensuring thorough mixing of the coal slurry water and flocculant.

[0007] Preferably, there are two inlet pipes; the two inlet pipes are respectively located on the front and rear parts of the first spiral blade along the feeding direction of the feed pipe; the inlet pipes pass through the feed pipe. This ensures the mixing of coal slurry and flocculant in the feed pipe, and also ensures the flocculant content in the thickener, further guaranteeing the mixing effect.

[0008] Preferably, the outlet is located on the back side of the first spiral blade relative to the feeding direction of the feed pipe, which can reduce the backflow of coal slurry water.

[0009] Preferably, the thickener includes a settling tank; a feed chamber is coaxially arranged inside the settling tank; a distribution chamber is coaxially arranged inside the feed chamber; the top surface of the feed chamber is higher than the top surface of the settling tank; a stirring shaft is arranged inside the distribution chamber; a drive assembly is connected to the upper end of the stirring shaft; the lower end of the stirring shaft is rotatably arranged inside the discharge port of the settling tank; a feed pipe is tangentially connected to the upper part of the outer wall of the feed chamber. Coal slurry enters the feed chamber tangentially through the feed pipe, forming a vortex, further mixing with the flocculant to enhance the mixing effect; then it enters the distribution chamber, and from there enters the settling tank for settling.

[0010] Preferably, a flow stabilizing component is installed at the bottom of the feed chamber; the flow stabilizing component includes a V-shaped flow stabilizing plate; the outer wall of the flow stabilizing plate is fixed to the inner wall of the settling tank by a support plate, and the flow stabilizing plate is provided with several through holes; the lower end of the stirring shaft passes through the flow stabilizing plate. The coal slurry flowing out of the distribution chamber falls onto the flow stabilizing plate, reducing the impact force of the falling coal slurry and avoiding affecting the sedimentation effect. The through holes on the flow stabilizing plate facilitate the passage of coal slurry.

[0011] Preferably, the feed chamber is arranged in a cylindrical shape; a skirt is provided at the lower end of the feed chamber; the outer wall of the feed chamber is fixed to the inner wall of the settling tank by connecting rods. The skirt further reduces the impact of coal slurry splashing on the settling process.

[0012] Preferably, the drive assembly includes a motor; the motor is fixedly mounted on the mounting plate; the mounting plate is fixedly mounted on the upper end of the feed chamber; and the motor output shaft is connected to the stirring shaft.

[0013] Preferably, the feeding chamber includes a cylindrical body that is open at the top and closed at the bottom; a guide plate is provided at the upper end of the cylindrical body in conjunction with the feed pipe; a stirring shaft is installed through the bottom surface of the cylindrical body; a second spiral blade on the stirring shaft is installed inside the cylindrical body; and several feeding ports are provided on the outer wall of the cylindrical body. The guide plate can guide the coal slurry water entering from the feed pipe into the feeding chamber, and then further enhance the mixing effect with the flocculant under the stirring of the second spiral blade, before flowing out from the feeding ports.

[0014] Preferably, the feeding ports are arranged in two layers along the height of the cylinder, with five feeding ports evenly distributed around the circumference in each layer; a receiving box is installed on the inner wall of the feeding chamber to match the feeding ports; and an overflow box is installed on the outer wall of the feeding chamber to match the feeding ports. After the coal slurry enters the feeding chamber, it enters the receiving box, and then flows into the overflow box through the feeding ports. It then overflows from the overflow box onto the flow stabilizing plate, reducing the impact of the falling coal slurry and ensuring the settling effect while improving the mixing effect of the coal slurry and flocculant.

[0015] As can be seen from the above technical solutions, the advantages of the present invention include: 1. When in use, flocculant is introduced into the inlet pipe and then flows out from the outlet to mix with coal slurry in the feed pipe. Under the guidance of the first spiral blade, the coal slurry forms a swirling flow and prolongs the flow path of the coal slurry in the feed pipe, so that the coal slurry and flocculant are fully mixed.

[0016] 2. Through the reasonable design of the feeding chamber, after the coal slurry enters the feeding chamber, it enters the receiving box, and then flows into the overflow box from the feeding port. It overflows from the overflow box and falls onto the flow stabilizing plate, which reduces the impact of the falling coal slurry and ensures the settling effect, while improving the mixing effect of coal slurry and flocculant. Attached Figure Description

[0017] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a partial cross-sectional structural diagram of the present invention.

[0020] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the first helical blade of the present invention.

[0022] Figure 5 This is a schematic diagram of the fabric chamber of the present invention.

[0023] Figure 6 This is a top view of the fabric compartment structure of the present invention.

[0024] Explanation of main figure symbols 1-Feed pipe, 2-First spiral blade, 3-Settling tank, 4-Feeding chamber, 5-Distribution chamber, 6-Flow stabilizer plate, 7-Support plate, 8-Connecting rod, 9-Agitator shaft, 10-Motor, 11-Mounting plate, 12-Scraper; 201-Discharge port; 202-Inlet pipe; 301-Discharge port; 401-Skirt plate; 501-Cylinder body; 502-Distribution port; 503-Receiving box; 504-Overflow box; 505-Drain plate; 901-Second spiral blade. Detailed Implementation

[0025] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0026] like Figure 1-4 As shown, a coal slurry thickening system includes a dosing device and a thickener. The dosing device includes a first spiral blade 2 fixedly mounted on the inner wall of the feed pipe 1 of the thickener. The first spiral blade 2 is hollow and has a discharge port 201. Two inlet pipes 202 are provided on the first spiral blade 2, one at the front and one at the rear along the feeding direction of the feed pipe 1. The inlet pipes 202 penetrate the feed pipe 1, ensuring the mixing of coal slurry and flocculant within the feed pipe 1 and maintaining the flocculant content in the thickener, further guaranteeing the mixing effect. The discharge port 201 is located on the back side of the first spiral blade 2 relative to the feeding direction of the feed pipe 1, reducing backflow of coal slurry.

[0027] The thickener includes a settling tank 3, which has an open top and a conical bottom with a discharge port 301 in the center. A feed chamber 4 is coaxially arranged inside the settling tank 3, with its top surface higher than that of the settling tank 3 to prevent overflow water from re-entering the feed chamber 4 after clarification. A feed pipe 1 penetrates the outer wall of the settling tank 3 and connects tangentially to the upper part of the outer wall of the feed chamber 4. Coal slurry water enters the feed chamber 4 tangentially through the feed pipe 1, forming a swirling flow that further mixes with the flocculant, enhancing the mixing effect. The feed chamber 4 is generally cylindrical; a skirt 401 is provided at the lower end of the feed chamber 4; the outer wall of the feed chamber 4 is fixed to the inner wall of the settling tank 3 by a connecting rod 8. The skirt 401 further reduces the impact of falling coal slurry water splashing on settling.

[0028] A material distribution chamber 5 is coaxially arranged inside the feeding chamber 4, and an agitator 9 is arranged inside the material distribution chamber 5. A drive assembly is connected to the upper end of the agitator 9. The lower end of the agitator 9 is rotatably arranged inside the discharge port 301 of the settling tank 3. A circular platform is arranged inside the discharge port 301. The circular platform is fixed to the inner wall of the discharge port 301 by a support rod. The agitator 9 is rotatably arranged on the circular platform. The drive assembly includes a motor 10. The motor 10 is fixedly arranged on the mounting plate 11. The mounting plate 11 is fixedly arranged on the upper end of the feeding chamber 4. The output shaft of the motor 10 is connected to the agitator 9.

[0029] like Figure 5-6As shown, the feeding chamber 5 includes a cylindrical body 501 with an open top and a closed bottom; a guide plate 505 is provided at the upper end of the cylindrical body 501 in conjunction with the feed pipe 1; a stirring shaft 9 is installed through the bottom surface of the cylindrical body 501; a second spiral blade 901 on the stirring shaft 9 is installed inside the cylindrical body 501; ten feeding ports 502 are provided on the outer wall of the cylindrical body 501. The guide plate 505 can guide the coal slurry water entering from the feed pipe 1 into the feeding chamber 5, and then further enhance the mixing effect with the flocculant under the stirring of the second spiral blade 901, and then flow out from the feeding ports 502. Ten material distribution ports 502 are arranged in two layers along the height of the cylinder 501, with five material distribution ports 502 evenly distributed in each layer along the circumference, and the material distribution ports 502 in the two layers are staggered. A receiving box 503 is provided on the inner wall of the material distribution chamber 5 in conjunction with the material distribution ports 502; an overflow box 504 is provided on the outer wall of the material distribution chamber 5 in conjunction with the material distribution ports 502. After the coal slurry enters the material distribution chamber 5, it enters the receiving box 503, and then flows from the material distribution ports 502 into the overflow box 504. It then overflows from the overflow box 504 and falls onto the flow stabilizing plate 6, reducing the impact of the falling coal slurry and ensuring the settling effect while improving the mixing effect of the coal slurry and flocculant.

[0030] A flow stabilizing assembly is installed at the lower part of the feed chamber 4. This assembly includes a V-shaped flow stabilizing plate 6. The outer wall of the flow stabilizing plate 6 is fixed to the inner wall of the settling tank 3 via support plates 7. The flow stabilizing plate 6 has several through holes. The lower end of the stirring shaft 9 passes through the flow stabilizing plate 6. The coal slurry flowing out of the distribution chamber 5 falls onto the flow stabilizing plate 6, reducing the impact force of the falling coal slurry and preventing it from affecting the settling effect. The through holes on the flow stabilizing plate 6 facilitate the passage of the coal slurry.

[0031] In use, the ratio of flocculant introduced into the inlet pipe 202 at the front end of the first spiral blade 2 to that introduced into the inlet pipe 202 at the rear end of the first spiral blade 2 is 60:40. The flocculant in the first spiral blade 2 flows out from the outlet 201 into the feed pipe 1 and mixes with the coal slurry. Under the guidance of the first spiral blade 2, the coal slurry forms a swirling flow, which prolongs the flow path of the coal slurry in the feed pipe 1, allowing the coal slurry and flocculant to mix thoroughly.

[0032] Subsequently, the coal slurry and flocculant entering through the inlet pipe 202 at the rear end of the first spiral blade 2 enter the feed chamber 4 tangentially, rotating and falling onto the guide plate 505 of the distribution chamber 5. Under the spiral conveying and stirring of the second spiral blade 901, the coal slurry and flocculant are further mixed, and then enter the overflow box 504 through the receiving box 503 and the distribution port 502. The overflowing coal slurry falls onto the flow stabilizing plate 6, further reducing the impact of the impact force on the settling of the coal slurry, and then falls into the lower part of the settling tank 3 through the through holes on the flow stabilizing plate 6. A scraper 12 is provided on the stirring shaft 9, and the scraper 12 is attached to the bottom surface of the settling tank 3. The settled coal slurry flows out from the outlet 301. The clarified overflow water overflows from the upper end of the settling tank 3.

[0033] It can achieve efficient mixing of coal slurry water and flocculant aqueous solution, and the reagent and slurry can fully interact, which can save reagent consumption, reduce coal slurry water settling time, improve the clarity of circulating water, and ensure the normal production of coal preparation plant.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coal slurry water thickening system, comprising a dosing device and a thickener, characterized in that, The dosing device includes a first spiral blade (2) fixedly installed on the inner wall of the feed pipe (1) of the concentrator; the first spiral blade (2) is hollow; a drug outlet (201) is provided on the first spiral blade (2); and a drug inlet pipe (202) is provided on the first spiral blade (2). The thickener includes a settling tank (3); a feed chamber (4) is coaxially arranged inside the settling tank (3); the top surface of the feed chamber (4) is higher than the top surface of the settling tank (3); a distribution chamber (5) is coaxially arranged inside the feed chamber (4); the distribution chamber (5) includes a cylinder (501) with an open top and a closed bottom; a guide plate (505) is provided at the upper end of the cylinder (501) in conjunction with the feed pipe (1); a number of distribution ports (502) are provided on the outer wall of the cylinder (501); the number of distribution ports (502) are arranged in two layers along the height direction of the cylinder (501), and five distribution ports (502) are evenly arranged in each layer along the circumference; a receiving box (503) is provided on the inner wall of the distribution chamber (5) in conjunction with the distribution ports (502); an overflow box (504) is provided on the outer wall of the distribution chamber (5) in conjunction with the distribution ports (502).

2. The coal slurry water thickening system according to claim 1, characterized in that, There are two inlet pipes (202); the two inlet pipes (202) are respectively set on the front and rear parts of the first spiral blade (2) along the feeding direction of the feed pipe (1); the inlet pipes (202) pass through the feed pipe (1).

3. The coal slurry water thickening system according to claim 1, characterized in that, The outlet (201) is located on the back side of the first spiral blade (2) relative to the feeding direction of the feed pipe (1).

4. The coal slurry water thickening system according to claim 1, characterized in that, A stirring shaft (9) is installed in the feeding chamber (5); a drive assembly is connected to the upper end of the stirring shaft (9); the lower end of the stirring shaft (9) is rotatably installed in the discharge port (301) of the settling tank (3); the feed pipe (1) is connected to the upper part of the outer wall of the feed chamber (4) along the tangential direction.

5. The coal slurry water thickening system according to claim 4, characterized in that, The feed chamber (4) is equipped with a flow stabilizing component at the bottom; the flow stabilizing component includes a flow stabilizing plate (6) with a V-shaped cross section; the outer wall of the flow stabilizing plate (6) is fixed to the inner wall of the settling tank (3) by a support plate (7), and the flow stabilizing plate (6) is provided with several through holes; the lower end of the stirring shaft (9) passes through the flow stabilizing plate (6).

6. The coal slurry water thickening system according to claim 5, characterized in that, The feeding chamber (4) is set in a cylindrical shape; a skirt (401) is set at the lower end of the feeding chamber (4); the outer wall of the feeding chamber (4) is fixed to the inner wall of the settling tank (3) by a connecting rod (8).

7. The coal slurry water thickening system according to claim 4, characterized in that, The drive assembly includes a motor (10); the motor (10) is fixedly mounted on the mounting plate (11); the mounting plate (11) is fixedly mounted on the upper end of the feed chamber (4); the output shaft of the motor (10) is connected to the stirring shaft (9).

8. The coal slurry water thickening system according to claim 4, characterized in that, The stirring shaft (9) is set through the bottom surface of the cylinder (501); the second spiral blade (901) on the stirring shaft (9) is set inside the cylinder (501).

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