A nano calcium carbonate production line

Abstract

A kind of nano calcium carbonate production line, including slurry storage tank 1, carbonization kettle 2, spin vibration screen 3 and coating kettle 4, the top of slurry storage tank 1 is provided with feed inlet and water inlet, the bottom of slurry storage tank 1 is provided with slurry outlet, the top of carbonization kettle 2 is provided with feed inlet, water inlet and exhaust port, the bottom of carbonization kettle 2 is provided with carbonization outlet and gas inlet;The advantages are: nano calcium carbonate production speed is fast, increase coating kettle to modify processing to product, finished product nano calcium carbonate particle size is uniform.

Description

Technical Field

[0001] This utility model relates to the field of calcium carbonate production equipment, specifically to a nano-calcium carbonate production line. Background Technology

[0002] Currently, the most mature application of nano-calcium carbonate is in the plastics industry, primarily used in high-end plastic products. It can improve the rheological properties of plastic masterbatches and enhance their moldability. As a plastic filler, it has a toughening and reinforcing effect, improving the flexural strength, flexural modulus, heat distortion temperature, and dimensional stability of plastics, while also imparting thermal resistance. Nano-calcium carbonate exhibits excellent dispersibility, transparency, and gloss in ink products, as well as excellent ink absorption and high drying properties. In resin-based inks, nano-calcium carbonate, as an ink filler, offers advantages such as good stability, high gloss, no impact on the drying performance of printing inks, and strong adaptability. However, existing nano-calcium carbonate production lines lack screening and coating processes, resulting in poor particle uniformity and the absence of oleophilic and hydrophobic properties in the produced nano-calcium carbonate particles. Utility Model Content

[0003] The purpose of this invention is to address the above-mentioned shortcomings by providing a nano-calcium carbonate production line.

[0004] This utility model includes a slurry storage tank, a carbonization kettle, a vibrating screen, and a coating kettle.

[0005] The slurry storage tank is equipped with a feed inlet and a water inlet at the top, and a slurry outlet at the bottom. The carbonization reactor is equipped with a feed inlet, a water inlet, and an exhaust outlet at the top, and a carbonization outlet and a gas filling inlet at the bottom. The coating reactor is equipped with a feed inlet, a water inlet, an additive inlet, and an exhaust outlet at the top, and a discharge outlet at the bottom. The slurry outlet of the slurry storage tank is connected to the feed inlet of the carbonization reactor. The carbonization outlet of the carbonization reactor is connected to the feed inlet of the vibrating screen. The screening outlet of the vibrating screen is connected to the feed inlet of the coating reactor.

[0006] The discharge port of the coating kettle is connected to a drying system, which includes a filter press, a twin-paddle dryer, a screw conveyor, and a flash dryer. The discharge port of the coating kettle is connected to the inlet of the filter press, the outlet of the filter press is connected to the inlet of the twin-paddle dryer, and the outlet of the twin-paddle dryer is connected to the inlet of the flash dryer via a screw conveyor.

[0007] The top of the vibrating screen is equipped with a rinsing port.

[0008] The inlets of the slurry storage tank, carbonization kettle, and coating kettle are connected to the main production water pipe, and the rinsing port of the vibrating screen is connected to the main production water pipe.

[0009] A disc turbine agitator is installed at the bottom of the stirring shaft of the carbonization reactor.

[0010] The exhaust ports of the carbonization kettle and the coating kettle are respectively connected to the exhaust gas main pipe.

[0011] A steam pipe is installed on the lower part of the coating vessel, through which steam is introduced into the coating vessel.

[0012] The outer wall of the carbonization reactor is covered with a water-cooling jacket.

[0013] The advantages of this invention are: fast production speed of nano-calcium carbonate, the addition of a coating reactor for product modification treatment, and uniform particle size of the finished nano-calcium carbonate particles. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the drying system of this utility model. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, if terms such as "first" or "second" appear in the description of the present invention, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0021] As shown in the attached diagram, this utility model includes a slurry storage tank 1, a carbonization kettle 2, a vibrating screen 3, and a coating kettle 4.

[0022] The top of the slurry storage tank 1 is provided with a feed inlet and a water inlet, and the bottom of the slurry storage tank 1 is provided with a slurry outlet. The top of the carbonization kettle 2 is provided with a feed inlet, a water inlet, and an exhaust port, and the bottom of the carbonization kettle 2 is provided with a carbonization outlet and a gas filling inlet. The top of the coating kettle 4 is provided with a feed inlet, a water inlet, an additive inlet, and an exhaust port, and the bottom of the coating kettle 4 is provided with a discharge port. The slurry outlet of the slurry storage tank 1 is connected to the feed inlet of the carbonization kettle 2. The carbonization outlet of the carbonization kettle 2 is connected to the feed inlet of the vibrating screen 3. The screening outlet of the vibrating screen 3 is connected to the feed inlet of the coating kettle 4.

[0023] The discharge port of the coating vessel 4 is connected to a drying system, which includes a filter press 5, a twin-paddle dryer 6, a screw conveyor 7, and a flash dryer 8. The discharge port of the coating vessel 4 is connected to the inlet of the filter press 5, the outlet of the filter press 5 is connected to the inlet of the twin-paddle dryer 6, and the outlet of the twin-paddle dryer 6 is connected to the inlet of the flash dryer 8 through the screw conveyor 7.

[0024] The top of the vibrating screen 3 is equipped with a rinsing port.

[0025] The inlets of the slurry storage tank 1, carbonization kettle 2 and coating kettle 4 are respectively connected to the main production water pipe 9, and the rinsing port of the vibrating screen 3 is connected to the main production water pipe 9.

[0026] A disc turbine agitator is installed at the bottom of the stirring shaft of the carbonization kettle 2.

[0027] The exhaust ports of carbonization kettle 2 and coating kettle 4 are respectively connected to the exhaust gas main pipe.

[0028] A steam pipe 10 is provided on the lower part of the coating vessel 4, through which steam is introduced into the coating vessel 4.

[0029] The outer wall of carbonization reactor 2 is covered with a water-cooling jacket.

[0030] Example 1: Calcium hydroxide slurry and production water are added to slurry storage tank 1 and stirred. The diluted calcium hydroxide slurry after mixing is pumped to carbonation reactor 2 and reacted with carbon dioxide gas to form calcium carbonate slurry. Cooling water is circulated into the water-cooled jacket during the carbonation reaction to lower the temperature. The calcium carbonate slurry is pumped to a vibrating screen 3 to remove large particles of impurities. After sieving, production water is added to rinse the screen. The sieved raw material enters a coating reactor 4, where production water, steam, and additives are added and stirred. The calcium carbonate slurry reacts with the additives, and steam heating is used to modify the surface of the calcium carbonate raw material.

[0031] The slurry output from the coating vessel 4 is pumped to the filter press 5. The raw material with water filtered out enters the double paddle dryer 6. The pre-dried raw material is conveyed upward through the screw conveyor 7 to the flash dryer 8 for secondary drying. The finished nano calcium carbonate is output from the bag filter outlet of the flash dryer 8.

Claims

1. A nano-calcium carbonate production line, characterized in that... It includes a slurry storage tank (1), a carbonization kettle (2), a vibrating screen (3), and a coating kettle (4). The top of the slurry storage tank (1) is provided with a feed inlet and a water inlet, and the bottom of the slurry storage tank (1) is provided with a slurry outlet. The top of the carbonization kettle (2) is provided with a feed inlet, a water inlet and an exhaust outlet, and the bottom of the carbonization kettle (2) is provided with a carbonization outlet and a gas filling inlet. The top of the coating kettle (4) is provided with a feed inlet, a water inlet, an additive inlet and an exhaust outlet, and the bottom of the coating kettle (4) is provided with a discharge outlet. The slurry outlet of the slurry storage tank (1) is connected to the feed inlet of the carbonization kettle (2), the carbonization outlet of the carbonization kettle (2) is connected to the feed inlet of the vibrating screen (3), and the screening outlet of the vibrating screen (3) is connected to the feed inlet of the coating kettle (4).

2. The nano-calcium carbonate production line according to claim 1, characterized in that, The discharge port of the coating vessel (4) is connected to a drying system, which includes a filter press (5), a double-paddle dryer (6), a screw conveyor (7), and a flash dryer (8). The discharge port of the coating vessel (4) is connected to the inlet of the filter press (5), the outlet of the filter press (5) is connected to the inlet of the double-paddle dryer (6), and the outlet of the double-paddle dryer (6) is connected to the inlet of the flash dryer (8) through the screw conveyor (7).

3. The nano-calcium carbonate production line according to claim 1, characterized in that, The top of the vibrating screen (3) is provided with a rinsing port.

4. The nano-calcium carbonate production line according to claim 3, characterized in that, The inlets of the slurry storage tank (1), carbonization kettle (2) and coating kettle (4) are connected to the main production water pipe (9), and the flushing port of the vibrating screen (3) is connected to the main production water pipe (9).

5. A nano-calcium carbonate production line according to claim 1, characterized in that, A disc turbine agitator is installed at the bottom of the stirring shaft of the carbonization kettle (2).

6. The nano-calcium carbonate production line according to claim 1, characterized in that, The exhaust ports of the carbonization kettle (2) and the coating kettle (4) are respectively connected to the exhaust gas main pipe.

7. A nano-calcium carbonate production line according to claim 1, characterized in that, A steam pipe (10) is provided on the lower part of the coating vessel (4), through which steam is introduced into the coating vessel (4).

8. A nano-calcium carbonate production line according to claim 1, characterized in that, The outer wall of the carbonization vessel (2) is covered with a water-cooled jacket.

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