A slurry storage tank for calcium carbonate production

Abstract

The utility model relates to a kind of slurry storage barrels for calcium carbonate production, including pressure bucket, the upper portion of pressure bucket is equipped with slurry inlet, the lower portion of pressure bucket is equipped with slurry outlet, the inside of pressure bucket is equipped with rotating stirring shaft, stirring shaft is fixedly connected with stir bar, pressure bucket is fixedly connected with pressure gas input pipe.The slurry storage barrels for calcium carbonate production described in the application utilizes the principle that solubility of carbon dioxide increases with increasing pressure, by increasing the pressure in the pressure bucket through pressure gas input, the solubility of carbon dioxide gas in water increases after the pressure increases and the combination of hydroxyl ions and carbonate is achieved by stirring, making the reaction more complete.

Description

Technical Field

[0001] This utility model relates to a slurry storage tank, and more particularly to a slurry storage tank for calcium carbonate production. Background Technology

[0002] Slurry storage tanks are commonly used devices in the calcium carbonate production process. In order to ensure the stability of the calcium carbonate slurry output concentration, it is often necessary to use a stirring device to fully stir the slurry in the storage tank in order to reduce the separation of calcium carbonate stratification.

[0003] Currently, during the storage of calcium carbonate slurry, there is a phenomenon of incomplete reaction of the calcium carbonate slurry, resulting in the presence of hydroxide ions inside the calcium carbonate slurry, which reduces the quality of calcium carbonate and affects its later use. Existing slurry storage tanks usually introduce carbon dioxide gas from the bottom. Under normal pressure, the bubbles formed by carbon dioxide cannot fully contact the hydroxide ions in the calcium carbonate slurry, resulting in an unsatisfactory carbonation effect. Utility Model Content

[0004] The purpose of this invention is to provide a slurry storage tank for calcium carbonate production, which solves the problem that in existing slurry storage tanks, when carbon dioxide gas is introduced from the bottom, the bubbles formed by the carbon dioxide under normal pressure cannot fully contact the hydroxide ions in the calcium carbonate slurry, resulting in an unsatisfactory carbonation effect.

[0005] To solve the above problems, this utility model provides a slurry storage tank for calcium carbonate production, including a pressure tank. The upper part of the pressure tank is provided with a slurry inlet, the lower part of the pressure tank is provided with a slurry outlet, the inside of the pressure tank is provided with a rotating stirring shaft, a stirring rod is fixedly connected to the stirring shaft, and a pressure gas input pipe is fixedly connected to the pressure tank.

[0006] The slurry storage tank for calcium carbonate production provided by this utility model also has the following technical features: Furthermore, a drive frame is fixedly connected to the top of the stirring shaft, and the edge of the drive frame is provided with inclined drive blades arranged in a circumferential array. The pressure gas input pipe is perpendicular to the inclined surface of the drive blades.

[0007] Furthermore, a scraper is fixedly connected to the end of the stirring rod, and the scraper contacts the inner wall of the pressure tank.

[0008] Furthermore, the upper and lower parts of the pressure tank are fixedly connected to support brackets, and the center of the support brackets is rotatably connected to the stirring shaft.

[0009] Furthermore, the top and bottom of the pressure tank are arc-shaped, and an inspection port is provided on the top of the pressure tank.

[0010] Furthermore, the pressure tank is equipped with support legs at the bottom.

[0011] The present invention has the following beneficial effects: The calcium carbonate production slurry storage tank described in this application utilizes the principle that the solubility of carbon dioxide increases with increasing pressure. By increasing the pressure of the tank through the input of pressurized gas, the amount of carbon dioxide gas dissolved in water increases after the pressure increases, and the stirring allows hydroxide ions and carbonate ions to combine, making the reaction more complete. Attached Figure Description

[0012] Figure 1 This is a cross-sectional isometric schematic diagram of a slurry storage tank for calcium carbonate production according to an embodiment of the present invention; Figure 2 This is an isometric schematic diagram of a slurry storage tank for calcium carbonate production according to an embodiment of the present invention; Figure 3 This is a right-side cross-sectional view of a slurry storage tank for calcium carbonate production according to an embodiment of the present invention. Figure 4 This is a top cross-sectional view of a slurry storage tank for calcium carbonate production according to an embodiment of the present invention.

[0013] (1-Pressure tank, 2-Slurry inlet, 3-Slurry outlet, 4-Agitator shaft, 5-Agitator rod, 6-Pressure gas input pipe, 7-Drive frame, 8-Drive blade, 9-Scraper, 10-Support bracket, 11-Inspection port, 12-Foot) Detailed Implementation

[0014] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0015] like Figures 1 to 4 In the embodiment of the calcium carbonate production slurry storage tank of the present invention shown, the calcium carbonate production slurry storage tank includes a pressure tank 1, a slurry inlet 2 at the upper part of the pressure tank 1, a slurry outlet 3 at the lower part of the pressure tank 1, a rotating stirring shaft 4 inside the pressure tank 1, a stirring rod 5 fixedly connected to the stirring shaft 4, and a pressure gas input pipe 6 fixedly connected to the pressure tank 1.

[0016] Specifically, the slurry enters the pressure tank 1 through the slurry inlet 2. The pressure gas input pipe 3 is connected to an external carbon dioxide gas supply device. The supply pressure is adjusted to allow carbon dioxide to enter the pressure tank 1, increasing the pressure inside the pressure tank 1. This causes the stirring shaft 4 to rotate, and the carbon dioxide partially dissolves in the slurry. The carbonate ions formed by the dissolution neutralize the hydroxide ions in the slurry, completing the carbonation reaction. Finally, the slurry enters the next process through the slurry outlet 3. Utilizing the principle that the solubility of carbon dioxide increases with increasing pressure, the pressure inside the pressure tank 1 is increased by the pressure gas input. After the pressure increases, the amount of carbon dioxide gas dissolved in water increases, and the stirring allows the hydroxide ions and carbonate ions to combine, making the reaction more complete.

[0017] In one embodiment of this application, preferably, a drive frame 7 is fixedly connected to the top of the stirring shaft 4. The edge of the drive frame 7 is provided with inclined drive blades 8 arranged in a circumferential array. The pressure gas input pipe 6 is perpendicular to the inclined surface of the drive blades 8. The pressure gas input pipe 6 is connected to an external high-pressure carbon dioxide supply device to supply high-pressure gas in a pulse form. The high-speed airflow enters the pressure tank 1 and drives the drive blades 8 to drive the drive frame 7 and the stirring shaft 4 to rotate to form a stirring. During the stirring process, carbon dioxide dissolves in the slurry or the slurry outlet 3 discharges the material, which reduces the pressure inside the pressure tank 1. At this time, the high-pressure gas is input again in a pulse form, and the pressure difference can be used to increase the thrust of the airflow.

[0018] In one embodiment of this application, preferably, a scraper 9 is fixedly connected to the end of the stirring rod 5, and the scraper 9 contacts the inner wall of the pressure tank 1 to scrape off calcium carbonate particles adsorbed on the inner wall of the pressure tank 1.

[0019] In one embodiment of this application, preferably, the upper and lower parts of the pressure tank 1 are fixedly connected with support brackets 10, and the center of the support brackets 10 is rotatably connected to the stirring shaft 4, for supporting the rotating components such as the stirring shaft 4 to rotate inside the pressure tank 1.

[0020] In one embodiment of this application, preferably, the top and bottom of the pressure tank 1 are arc-shaped, and the top of the pressure tank 1 is provided with an inspection port 11 for better pressure bearing of the pressure tank 1.

[0021] In one embodiment of this application, preferably, the pressure tank 1 is provided with a support leg 12 at the bottom.

[0022] In summary, the calcium carbonate production slurry storage tank in the above embodiments of this utility model specifically involves the slurry entering the pressure tank 1 through the slurry inlet 2. A high-pressure carbon dioxide supply device is connected to the pressure gas input pipe 6 to supply high-pressure gas in a pulsed manner, allowing carbon dioxide to enter the pressure tank 1. The high-pressure airflow drives the drive blade 8, which in turn drives the drive frame 7 and the stirring shaft 4 to rotate, thus agitating the slurry inside the tank. This increases the pressure inside the pressure tank 1, causing partial dissolution of carbon dioxide in the slurry. The dissolved carbonate ions neutralize with hydroxide ions in the slurry, completing the carbonation reaction. After the carbon dioxide dissolves or is released from the slurry, the pressure inside the pressure tank 1 decreases. High-pressure air is then input again, and this cycle continues, allowing the slurry to flow to the next process. Utilizing the principle that the solubility of carbon dioxide increases with increasing pressure, the pressure inside the pressure tank 1 is increased by the input of pressure gas. The increased pressure leads to an increase in the amount of carbon dioxide dissolved in water, and the agitation causes hydroxide ions and carbonate ions to combine, resulting in a more complete reaction.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A slurry storage tank for calcium carbonate production, characterized in that, The device includes a pressure tank, with a slurry inlet at the top and a slurry outlet at the bottom. Inside the pressure tank is a rotating stirring shaft with a stirring rod fixedly connected to it. A pressurized gas input pipe is fixedly connected to the pressure tank. The top of the stirring shaft is fixedly connected to a drive frame, and the edge of the drive frame is provided with inclined drive blades arranged in a circumferential array. The pressure gas input pipe is perpendicular to the inclined surface of the drive blades. A scraper is fixedly connected to the end of the stirring rod, and the scraper is in contact with the inner wall of the pressure tank. The pressure tank is fixedly connected to both the upper and lower parts by support brackets, and the center of the support brackets is rotatably connected to the stirring shaft.

2. The slurry storage tank for calcium carbonate production according to claim 1, characterized in that: The pressure tank has an arc-shaped top and bottom, and an inspection port is provided on the top of the pressure tank.

3. The slurry storage tank for calcium carbonate production according to claim 1, characterized in that: The pressure tank is equipped with support legs at the bottom.

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