A neutralization tank for calcium carbonate production

Abstract

The utility model relates to the technical field of calcium carbonate preparation technique discloses a kind of for calcium carbonate preparation and neutralization tank, including the tank body of bottom setting with discharge port, and the tank cover of tank body top by bolt installation, the centre of circle of tank cover top is equipped with stirring gas injection subassembly;Stirring gas injection subassembly includes rotation installation in the centre of circle of tank cover stirring shaft, and for driving the rotation of stirring shaft driving structure, multiple stirring vanes are welded in the one end of stirring shaft located in the inside of tank body, the centre of circle of tank body is equipped with airflow channel, and the periphery of tank body is longitudinally equipped with multiple groups of vent hole with equidistance, and vent hole is connected with airflow channel. The used for calcium carbonate preparation and neutralization tank, through rotating type porous dispersion structure, realizes the dynamic uniform distribution of CO2 in three-dimensional reaction space, makes CO2 injection point with spiral trajectory cover full tank volume, eliminates gas dead angle, avoids local enrichment, improves carbonation reaction rate spatial consistency.

Description

Technical Field

[0001] This utility model relates to the field of calcium carbonate preparation technology, and in particular to a neutralization tank for calcium carbonate preparation. Background Technology

[0002] In the production process of light calcium carbonate, the neutralization tank is the core equipment for the carbonation reaction between calcium hydroxide (lime slurry, Ca(OH)2) suspension and carbon dioxide (CO2). The traditional process uses a fixed CO2 injection pipe, with gas introduced unidirectionally from a local location in the tank.

[0003] The following problems may occur when CO2 is injected locally: concentrated CO2 injection leads to a sharp increase in the concentration gradient of the reaction area, forming high reaction zone and low reaction zone in the tank. The local reaction rate difference is too large. In the high concentration zone, the reaction is too fast and calcium bicarbonate intermediate or amorphous calcium carbonate is easily generated, while the reaction in the low concentration zone is lagging behind, resulting in a wide product particle size distribution and low crystal form consistency. The overall asynchronous reaction results in a wide particle size distribution of calcium carbonate particles. Utility Model Content

[0004] In view of the problem that the asynchronous overall reaction in the existing system results in a wide particle size distribution of calcium carbonate particles, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a neutralization tank for the preparation of calcium carbonate, the purpose of which is that the overall reaction is more synchronized and the particle size distribution of calcium carbonate particles is consistent.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a neutralization tank for calcium carbonate preparation, comprising a tank body with a discharge port at the bottom, and a tank cover installed on the top of the tank body by bolts, wherein a stirring and gas injection assembly is installed at the center of the top of the tank cover;

[0007] The stirring and gas injection assembly includes a stirring shaft rotatably mounted at the center of the tank cover, and a drive structure for driving the stirring shaft to rotate. Multiple stirring blades are welded to one end of the stirring shaft located inside the tank body. An airflow channel is opened at the center of the tank body. Multiple sets of vent holes are opened longitudinally at equal intervals on the peripheral surface of the tank body, and the vent holes are connected to the airflow channel.

[0008] As an improved technical solution, a discharge pipe is welded to the discharge port at the bottom of the tank, and three support legs are welded at equal intervals on the periphery of the bottom of the tank.

[0009] As an improved technical solution, a filling port is provided on the outer edge of the top of the tank, and a feed pipe is welded to the position directly opposite the filling port.

[0010] As an improved technical solution, an L-shaped connecting pipe is rotatably installed at one end of the airflow channel near the drive structure. A pipe bracket is sleeved on the lateral end of the L-shaped connecting pipe, and the pipe bracket is fixed to the top of the can lid.

[0011] As an improved technical solution, the drive structure includes a servo motor mounted on the top of the tank lid, a drive gear mounted on the drive end of the servo motor, and a driven gear meshing with the drive gear at one end of the stirring shaft near the L-shaped connecting pipe.

[0012] As an improved technical solution, the peripheral surface of the tank is fitted with a filter structure for sealing the vent holes. The filter structure includes a filter screen fitted on the stirring shaft, and both ends of the filter screen are fitted with cable ties.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are:

[0014] 1. In this utility model, multiple sets of vent holes are longitudinally distributed inside the tank, injecting CO2 into the tank at multiple points. This improves the overall and uniform dispersion of CO2 into the tank. At the same time, a servo motor drives the servo motor to rotate. Under the meshing transmission of the drive gear and the driven gear, the servo motor can drive the stirring shaft to rotate, which in turn drives the vent holes to rotate. The rotation of the vent holes avoids the spray dead angle between two adjacent vent holes, thereby further improving the uniformity and overall dispersion of CO2 inside the tank.

[0015] 2. In this utility model, the filter screen is used to block the air vents and prevent particulate matter in the material from entering and causing blockage. This helps to ensure normal airflow through the air vents. The cable tie is fixed to the stirring shaft through the two filter screens. The filter screens can be removed from the stirring shaft by cutting the cable tie, making it convenient to replace the filter screens.

[0016] 3. This utility model achieves dynamic and uniform distribution of CO2 in the three-dimensional reaction space through a rotating porous dispersion structure, so that the CO2 injection point covers the entire tank volume with a spiral trajectory, eliminating gas dead zones, avoiding local enrichment, and improving the spatial consistency of carbonization reaction rate. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1This is a schematic diagram of the overall structure of a neutralization tank for calcium carbonate preparation according to the present invention.

[0019] Figure 2 This is a schematic diagram of the stirring and gas injection assembly of a neutralization tank for calcium carbonate preparation according to the present invention.

[0020] Figure 3 This utility model relates to a neutralization tank for the preparation of calcium carbonate. Figure 2 A schematic diagram of the structure at point A in the middle.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Tank body; 2. Support legs; 3. Discharge pipe; 4. Tank cover; 5. Feed pipe; 6. Agitator and aeration assembly; 7. Agitator shaft; 8. Filter structure; 81. Filter screen; 82. Cable tie; 9. Drive structure; 91. Servo motor; 92. Drive gear; 93. Driven gear; 10. Agitator blade; 11. Vent hole; 12. Airflow channel; 13. L-shaped connecting pipe; 14. Pipe rack. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Example 1

[0025] Reference Figures 1-3 This is the first embodiment of the present invention, which provides a neutralization tank for calcium carbonate preparation. This neutralization tank for calcium carbonate preparation includes a tank body 1 with a discharge port at the bottom, and a tank cover 4 installed on the top of the tank body 1 by bolts. A stirring and gas injection assembly 6 is installed at the center of the top of the tank cover 4, and the stirring end and the gas outlet end of the stirring and gas injection assembly 6 are located inside the tank body 1.

[0026] The stirring and gas injection assembly 6 includes a stirring shaft 7 rotatably mounted at the center of the tank cover 4, and a drive structure 9 for driving the stirring shaft 7 to rotate. Multiple stirring blades 10 are welded to one end of the stirring shaft 7 located inside the tank body 1. An airflow channel 12 is provided at the center of the tank body 1. Multiple sets of vent holes 11 are longitudinally and evenly spaced on the peripheral surface of the tank body 1, and the vent holes 11 are connected to the airflow channel 12. The multiple sets of vent holes 11 are longitudinally distributed from the inside of the tank body 1, injecting CO2 into the inside of the tank body 1 at multiple points, which helps to improve the comprehensiveness and uniformity of CO2 dispersion into the inside of the tank body 1.

[0027] A discharge pipe 3 is welded to the discharge port at the bottom of the tank body 1. Three support legs 2 are welded at equal intervals on the periphery of the bottom of the tank body 1, and the three support legs 2 are distributed in a circular pattern.

[0028] A filling port is provided on the outer edge of the top of the tank body 1, and a feed pipe 5 is welded to the position directly opposite the filling port.

[0029] An L-shaped connecting pipe 13 is rotatably installed at one end of the airflow channel 12 near the drive structure 9. A pipe bracket 14 is sleeved on the lateral end of the L-shaped connecting pipe 13, and the pipe bracket 14 is fixed to the top of the tank cover 4. The servo motor 91 can drive the stirring shaft 7 to rotate, thereby driving the vent 11 to rotate. The rotation of the vent 11 will avoid the jet dead angle between two adjacent vents 11, thereby further improving the uniformity and comprehensiveness of CO2 dispersion inside the tank 1.

[0030] The drive structure 9 includes a servo motor 91 mounted on the top of the tank cover 4. The drive end of the servo motor 91 is equipped with a drive gear 92. The end of the stirring shaft 7 near the L-shaped connecting pipe 13 is fitted with a driven gear 93 that meshes with the drive gear 92. While driving the stirring shaft 7 to rotate, the drive structure 9 also drives the stirring blades 10 to rotate and agitate the material inside the tank 1. Sharing a single drive source reduces costs and space requirements.

[0031] During use, the rotating porous dispersion structure enables dynamic and uniform distribution of CO2 in the three-dimensional reaction space, allowing the CO2 injection point to cover the entire tank volume with a spiral trajectory, eliminating gas dead zones, avoiding local enrichment, and improving the spatial consistency of the carbonization reaction rate.

[0032] Example 2

[0033] Reference Figure 2 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that a filter structure 8 for sealing the vent hole 11 is fitted around the periphery of the tank body 1. The filter structure 8 includes a filter screen 81 fitted on the stirring shaft 7. Both ends of the filter screen 81 are fitted with cable ties 82, and the filter screen 81 is fixed on the stirring shaft 7 by the cable ties 82.

[0034] During use, the filter screen 81 is used to block the vent hole 11, blocking particulate matter in the material. This helps to prevent impurities from entering the vent hole 11 and causing blockage, thus ensuring normal ventilation of the vent hole 11. The cable tie 82 is fixed to the stirring shaft 7 through the two filter screens 81. The filter screen 81 can be removed from the stirring shaft 7 by cutting the cable tie 82, making it convenient to replace the filter screen 81.

[0035] The remaining structure is the same as that in Example 1.

[0036] Based on embodiments 1-2, the working principle of this utility model is as follows: the CO2 pipeline is connected to the inlet of the L-shaped connecting pipe 13, the CO2 enters the interior of the airflow channel 12 through the L-shaped connecting pipe 13, and the CO2 is sprayed into the interior of the tank 1 through the vent holes 11. Multiple sets of vent holes 11 are longitudinally distributed from the interior of the tank 1, injecting CO2 into the interior of the tank 1 at multiple points.

[0037] At the same time, the servo motor 91 can drive the stirring shaft 7 to rotate, which in turn drives the vent 11 to rotate. The rotation of the vent 11 will avoid the spray dead angle between two adjacent vents 11, thereby further improving the uniformity and comprehensiveness of CO2 dispersion inside the tank 1.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A neutralization tank for calcium carbonate preparation, comprising a tank body (1) with a discharge port at the bottom, and a tank cover (4) bolted to the top of the tank body (1), characterized in that: A stirring and gas injection assembly (6) is installed at the center of the top of the can lid (4); The stirring and gas injection assembly (6) includes a stirring shaft (7) rotatably mounted at the center of the tank cover (4) and a driving structure (9) for driving the stirring shaft (7) to rotate. The stirring shaft (7) has multiple stirring blades (10) welded to one end inside the tank body (1). An airflow channel (12) is provided at the center of the tank body (1). Multiple sets of vent holes (11) are longitudinally and evenly spaced on the peripheral surface of the tank body (1), and the vent holes (11) are connected to the airflow channel (12).

2. A neutralization tank for calcium carbonate preparation according to claim 1, characterized in that: A discharge pipe (3) is welded to the discharge port at the bottom of the tank (1), and three support legs (2) are welded at equal intervals on the periphery of the bottom of the tank (1).

3. A neutralization tank for calcium carbonate preparation according to claim 2, characterized in that: The tank body (1) has an injection port on the outer edge of the top, and a feed pipe (5) is welded to the position of the injection port.

4. A neutralization tank for calcium carbonate preparation according to claim 3, characterized in that: An L-shaped connecting pipe (13) is rotatably installed at one end of the airflow channel (12) near the drive structure (9). A pipe bracket (14) is sleeved on the lateral end of the L-shaped connecting pipe (13), and the pipe bracket (14) is fixed to the top of the can cover (4).

5. A neutralization tank for calcium carbonate preparation according to claim 4, characterized in that: The drive structure (9) includes a servo motor (91) mounted on the top of the tank cover (4), and a drive gear (92) is mounted on the drive end of the servo motor (91). A driven gear (93) that meshes with the drive gear (92) is sleeved on one end of the stirring shaft (7) near the L-shaped connecting pipe (13).

6. A neutralization tank for calcium carbonate preparation according to claim 5, characterized in that: The peripheral surface of the tank (1) is fitted with a filter structure (8) for sealing the vent (11). The filter structure (8) includes a filter screen (81) fitted on the stirring shaft (7). Both ends of the filter screen (81) are fitted with cable ties (82).

Images