A desulfurizer mixing device with a spiral propeller

Abstract

The utility model discloses a kind of desulfurizer mixing devices with helical propeller, belong to flue gas desulfurization field, including mixing tank, the mixing tank includes straight cylinder cavity and conical cavity, the straight cylinder cavity is integrally formed with conical cavity, the mixing tank inside is provided with helical propulsion mechanism for material mixing, the mixing tank top is provided with feed inlet, the utility model structure is relatively simple, maintenance is convenient, by the helical propulsion mechanism of being set, by the rotation of helical blade, cooperate with the baffle of being set, rapidly form a severe, dead corner-free large-scale axial circulation flow field in whole mixing tank, and shear force, so that solid particles can be quickly wetted and dispersed by liquid, cooperate with the rotation of stirring blade and bottom scraper, by the rotation of bottom scraper, the solid particles possibly settled or accumulated in conical cavity inner wall dead corner place are scraped, cooperate with the rotation of stirring blade and stirring, it is favorable to improve the quality and efficiency of mixing.

Description

Technical Field

[0001] This utility model relates to the field of flue gas desulfurization technology, and in particular to a desulfurizing agent mixing device with a screw propeller. Background Technology

[0002] Desulfurizing agents generally refer to agents that remove free sulfur or sulfur compounds from fuels, raw materials or other materials; in the control and treatment of pollutants, they mainly refer to agents that can remove sulfur oxides (including SO2 and SO3) from waste gas.

[0003] In wet flue gas desulfurization (WFGD) processes, solid desulfurizing agents (such as limestone powder) need to be mixed with liquids (water or returned slurry) to prepare a suspension slurry of a certain concentration for use in the absorption tower. The uniformity of mixing directly affects the desulfurization efficiency and the stability of system operation. Traditional mixing devices often use simple mixing tanks or mixing vessels, relying on paddle agitators for mixing. This method has problems such as low mixing efficiency, easy agglomeration and sedimentation, high energy consumption, and many dead zones in the mixing, resulting in incomplete mixing and affecting the subsequent desulfurization effect. Utility Model Content

[0004] The purpose of this invention is to provide a desulfurizing agent mixing device with a screw propeller to solve the problems of low mixing efficiency, easy agglomeration and deposition, high energy consumption and many dead zones in existing mixing devices.

[0005] To achieve the above objectives, the present invention employs the following technology: a desulfurizing agent mixing device with a spiral propeller, comprising a mixing tank, the mixing tank comprising a cylindrical cavity and a conical cavity, the cylindrical cavity and the conical cavity being integrally formed, the mixing tank being provided with a spiral propulsion mechanism for material mixing inside, the mixing tank being provided with a feed inlet at the top, the mixing tank being provided with a discharge outlet at the bottom, the mixing tank being provided with a liquid inlet, and the mixing tank being provided with a baffle on its inner wall.

[0006] As a further description of the above technical solution: the spiral propulsion mechanism includes a drive motor fixedly installed on the top of the mixing tank, the output end of the drive motor is fixedly connected to a central rotating shaft, the central rotating shaft is fixedly connected to the inner and outer walls of the straight cylindrical cavity with spiral blades, and the central rotating shaft is provided with an auxiliary stirring assembly on the inner and outer walls of the conical cavity.

[0007] As a further description of the above technical solution: the auxiliary stirring assembly includes a fixed sleeve fixedly sleeved at the bottom end of the central rotating shaft, connecting rods are symmetrically fixedly connected to both sides of the outer wall of the fixed sleeve, a bottom scraper adapted to the inner wall of the conical cavity is fixedly connected to one end of the connecting rod, and stirring blades are fixedly connected to the connecting rod.

[0008] As a further description of the above technical solution: the inner wall of the mixing tank is fixedly connected with several baffles that are distributed at equal intervals.

[0009] As a further description of the above technical solution: the baffle is inclined in the opposite direction to the rotation direction of the spiral blade, and the angle between its plate surface and the radial direction of the mixing tank is 5°-15°.

[0010] As a further description of the above technical solution: an annular reinforcing rib is fixedly sleeved at the bottom of the outer wall of the mixing tank, and several equally spaced supporting legs are fixedly connected to the bottom of the annular reinforcing rib.

[0011] As a further description of the above technical solution: a discharge valve is provided on the discharge port.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: This invention features a relatively simple structure and is easy to maintain. Through a spiral propulsion mechanism, a drive motor rotates the spiral blades, stirring blades, and bottom scraper. The rotation of the spiral blades, combined with the baffles, rapidly creates a large-scale, intense, and comprehensive axial circulating flow field and shear force within the mixing tank. This allows solid particles to be quickly wetted and dispersed by the liquid. The rotation of the stirring blades and bottom scraper further cleans up any solid particles that may have settled or accumulated in the dead corners of the conical cavity, while the stirring blades agitate and throw them into the main circulating flow. This ensures that the bottom material fully participates in the mixing, preventing clumping and settling, resulting in high mixing uniformity and improved mixing quality and efficiency. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall structure according to an embodiment of the present utility model is shown; Figure 2 A schematic diagram of the internal structure of a mixing tank according to an embodiment of the present invention is shown. Figure 3 It shows Figure 2 Enlarged view of point A in the middle.

[0014] Legend: 1. Mixing tank; 101. Straight cylindrical cavity; 102. Conical cavity; 2. Annular reinforcing rib; 3. Support leg; 4. Discharge port; 5. Inlet port; 6. Screw propulsion mechanism; 61. Drive motor; 62. Central rotating shaft; 63. Spiral blade; 64. Fixing sleeve; 65. Connecting rod; 66. Stirring blade; 67. Bottom scraper; 7. Baffle; 8. Discharge valve. Detailed Implementation

[0015] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] Reference Figures 1-3 This embodiment provides a desulfurizing agent mixing device with a screw propeller, including a mixing tank 1. The mixing tank 1 includes a straight cylindrical cavity 101 and a conical cavity 102. The straight cylindrical cavity 101 and the conical cavity 102 are integrally formed. An annular reinforcing rib 2 is fixedly sleeved on the bottom of the outer wall of the mixing tank 1. Several equally spaced support legs 3 are fixedly connected to the bottom of the annular reinforcing rib 2. A screw propulsion mechanism 6 for material mixing is provided inside the mixing tank 1. A feed inlet 5 is provided at the top of the mixing tank 1. A discharge outlet 4 is provided at the bottom of the mixing tank 1. A liquid inlet is provided on the mixing tank 1. A discharge valve 8 is provided on the discharge outlet 4. A baffle 7 is provided on the inner wall of the mixing tank 1.

[0017] Specifically, when the device is started, raw materials are first added to the mixing tank 1 through the feed inlet 5. The drive motor 61 is then started, which drives the central shaft 62 to rotate. The central shaft 62 drives the spiral blades 63 to rotate. As a core component, the spiral blades 63 have a special pitch design that generates a strong axial pumping force when rotating. In a typical downward pumping design, the spiral blades 63 forcefully push the fluid from the top to the bottom of the mixing tank 1. This high-speed downward-rushing fluid impacts the conical cavity 102 and then rolls back up along the tank wall, thus rapidly forming a large-scale, intense, and dead-angle-free axial circulating flow field within the entire mixing tank 1. The baffle 7 effectively disrupts the circular motion of the fluid, converting its kinetic energy into radial and axial shear forces that enhance turbulence, preventing the formation of vortices and enhancing the mixing effect. Once a stable circulating flow field is established, solid desulfurizing agents, such as limestone powder, are continuously or intermittently added through the solid desulfurizing agent feed inlet 5. Simultaneously, liquid, water, or process water is replenished through the liquid inlet. The newly added dry powder particles are instantly drawn into the high-speed flowing liquid. In the narrow gap between the edge of the spiral blade 63 and the tank wall, the particle clumps are subjected to extremely high shear force and are rapidly broken and wetted. Under the action of the main circulation flow, the initially wetted particles are carried into the entire tank for continuous circulation, achieving macroscopic concentration homogenization. The stirring blade 66 and the bottom scraper 67 rotate at the same speed. The rotation of the bottom scraper 67 sweeps away solid particles that may have settled or accumulated in the dead corners of the inner wall of the conical cavity 102. Combined with the rotation of the stirring blade 66, these particles are thrown into the main circulation flow, ensuring that the bottom material fully participates in the mixing and fundamentally preventing caking and sedimentation. After the above efficient circulation, shearing, and dispersion process, the solid particles are completely and uniformly dispersed in the liquid, forming a homogeneous suspension slurry. By opening the discharge valve 8, the slurry is discharged through the discharge port 4 and enters the subsequent process flow.

[0018] Furthermore, the spiral propulsion mechanism 6 includes a drive motor 61 fixedly installed on the top of the mixing tank 1. The output end of the drive motor 61 is fixedly connected to a central rotating shaft 62. The central rotating shaft 62 is fixedly connected to the inner and outer walls of the straight cylindrical cavity 101 with spiral blades 63. The central rotating shaft 62 is provided with an auxiliary stirring assembly on the inner and outer walls of the conical cavity 102. The auxiliary stirring assembly includes a fixed sleeve 64 fixedly sleeved on the bottom end of the central rotating shaft 62. Connecting rods 65 are symmetrically fixedly connected to both sides of the outer wall of the fixed sleeve 64. One end of the connecting rod 65 is fixedly connected to a bottom scraper 67 adapted to the inner wall of the conical cavity 102. A stirring blade 66 is fixedly connected to the connecting rod 65.

[0019] Specifically, by starting the drive motor 61, the drive motor 61 drives the central rotating shaft 62 to rotate, the central rotating shaft 62 drives the spiral blades 63 and the connecting rod 65 to rotate, and the connecting rod 65 drives the stirring blades 66 and the bottom scraper 67 to rotate. Through the rotation of the spiral blades 63, the fluid in the upper part of the mixing tank 1 is forcibly pushed to the bottom. After this high-speed downward-rushing fluid hits the conical cavity 102, it rolls up and returns along the tank wall, thereby rapidly forming a violent, large-scale axial circulating flow field without dead angles in the entire mixing tank 1. With the rotation of the stirring blades 66 and the bottom scraper 67, the rotation of the bottom scraper 67 scrapes away solid particles that may settle or accumulate in the dead corners of the inner wall of the conical cavity 102, and with the rotation of the stirring blades 66, throws them into the main circulating flow, ensuring that the bottom material fully participates in the mixing, fundamentally preventing caking and sedimentation, and facilitating the improvement of mixing quality and efficiency.

[0020] Furthermore, the inner wall of the mixing tank 1 is fixedly connected with several equally spaced baffles 7. The baffles 7 are inclined in the opposite direction to the rotation direction of the spiral blade 63, and the angle between the baffle surface and the radial direction of the mixing tank 1 is 5°-15°.

[0021] Specifically, there are four baffles 7, which are evenly and symmetrically distributed along the circumference of the mixing tank 1 at 90°. Their function is to disrupt the swirling flow in the area close to the tank wall. Their presence is equivalent to setting up an "obstacle" in the path of fluid rotation, forcibly changing the direction of fluid movement. By tilting the baffles 7, the fluid can be better guided downwards, enhancing axial flow. When the fluid rotates at high speed under the drive of the helical blades 63, it will encounter the obstruction of the baffles 7, thereby converting the kinetic energy of the circumferential motion into radial and axial turbulence, which greatly enhances the shearing and mixing effect, thereby further improving the mixing efficiency and helping to bring the material at the top of the mixing tank 1 to the bottom.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A desulfurizing agent mixing device with a screw propeller, characterized in that, The mixing tank (1) includes a cylindrical cavity (101) and a conical cavity (102), which are integrally formed. The mixing tank (1) is provided with a spiral propulsion mechanism (6) for mixing materials. The mixing tank (1) is provided with a feed inlet (5) at the top and a discharge outlet (4) at the bottom. The mixing tank (1) is provided with a liquid inlet and a baffle (7) on the inner wall of the mixing tank (1).

2. The desulfurizing agent mixing device with a screw propeller according to claim 1, characterized in that, The spiral propulsion mechanism (6) includes a drive motor (61) fixedly installed on the top of the mixing tank (1). The output end of the drive motor (61) is fixedly connected to a central rotating shaft (62). The central rotating shaft (62) is fixedly connected to the inner and outer walls of the straight cylindrical cavity (101) with spiral blades (63). The central rotating shaft (62) is provided with auxiliary stirring components on the inner and outer walls of the conical cavity (102).

3. The desulfurizing agent mixing device with a screw propeller according to claim 2, characterized in that, The auxiliary stirring assembly includes a fixed sleeve (64) fixedly sleeved at the bottom of the central rotating shaft (62). Connecting rods (65) are symmetrically fixedly connected to both sides of the outer wall of the fixed sleeve (64). A bottom scraper (67) adapted to the inner wall of the conical cavity (102) is fixedly connected to one end of the connecting rod (65). A stirring blade (66) is fixedly connected to the connecting rod (65).

4. The desulfurizing agent mixing device with a screw propeller according to claim 1, characterized in that, The inner wall of the mixing tank (1) is fixedly connected with several equally spaced baffles (7).

5. A desulfurizing agent mixing device with a screw propeller according to claim 4, characterized in that, The baffle (7) is inclined in the opposite direction to the rotation direction of the spiral blade (63), and the angle between its plate surface and the radial direction of the mixing tank (1) is 5°-15°.

6. The desulfurizing agent mixing device with a screw propeller according to claim 1, characterized in that, The bottom of the outer wall of the mixing tank (1) is fixedly fitted with an annular reinforcing rib (2), and the bottom of the annular reinforcing rib (2) is fixedly connected with several equally spaced support legs (3).

7. The desulfurizing agent mixing device with a screw propeller according to claim 1, characterized in that, A discharge valve (8) is provided on the discharge port (4).

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