Calcium carbonate neutralizing tank

Abstract

The calcium carbonate neutralizing tank comprises a main tank, an auxiliary tank and a feeding main pipe, the main tank and the auxiliary tank are installed on the ground through supports, the auxiliary tank is higher than the main tank, and the lower portion of the auxiliary tank is communicated with an inner cavity of the main tank through a connecting main pipe; one end of the feeding main pipe is connected with the reaction tank, the other end of the feeding main pipe is connected with the main tank, and the feeding main pipe is further connected with the auxiliary tank through a bypass pipe; and feeding holes are formed in the upper parts of the main tank and the auxiliary tank. By configuring the main tank and the auxiliary tank, part of the manganese sulfate mixed solution can be firstly introduced into the auxiliary tank during the feeding period of the manganese sulfate mixed solution, the solution is mixed with calcium carbonate powder to form turbid liquid, then the turbid liquid is added into the main tank, and the turbid liquid flows into the main tank through the multiple connecting branch pipes; the calcium carbonate powder turbid liquid can be more easily and uniformly distributed in the main tank, so that the stirring and reaction time is reduced, the waiting time is shortened, and automatic feeding is realized by matching with an online PH (Potential of Hydrogen) detector.

Description

Technical Field

[0001] This application relates to the technical field of manganese dioxide manufacturing, and particularly to a calcium carbonate neutralization tank. Background Art

[0002] Currently, manganese dioxide is mainly obtained through electrolysis. Before electrolysis, manganese ore powder needs to be mixed and put into a reaction tank with sulfuric acid in a certain proportion. After the reaction, a mixed solution of manganese sulfate is obtained. Due to the complex composition of manganese ore powder, the mixed solution of manganese sulfate after the reaction still contains potassium and other heavy metal ions. Among them, when removing potassium, the pH value of the mixed solution of manganese sulfate needs to be controlled at 1 to 2, and then high-grade manganese oxide ore powder is added to the solution. After the reaction is completed, calcium carbonate is needed to adjust the pH value of the mixed solution of manganese sulfate to 6.5 to 7.0. Currently, in the neutralization process, workers mainly directly pour calcium carbonate powder into the mixed solution of manganese sulfate according to experience based on the pH value detection result. And in order to reduce the pressure of subsequent filtration, the calcium carbonate powder is usually added in an appropriate amount. After workers add the calcium carbonate powder, they need to wait for a period of time to measure the pH value and then feed the material again. The dispersion speed of the calcium carbonate powder is slow, resulting in a slow neutralization reaction speed, prolonging the waiting time, and the degree of automation is low. Therefore, a calcium carbonate neutralization tank is needed, which is provided with a main tank and a secondary tank. The calcium carbonate powder is formulated into a suspension in the secondary tank and then added to the main tank to improve the diffusion speed, and is combined with an on-line pH monitor to achieve automatic feeding. Summary of the Utility Model

[0003] In order to solve the above problems, this application proposes a calcium carbonate neutralization tank, which is provided with a main tank and a secondary tank. The calcium carbonate powder is formulated into a suspension in the secondary tank and then added to the main tank to improve the diffusion speed, and is combined with an on-line pH monitor to achieve automatic feeding.

[0004] This application is achieved through the following technical solutions:

[0005] This application proposes a calcium carbonate neutralization tank, including: a main tank, a secondary tank, and a main feed pipe. The main tank and the secondary tank are respectively installed on the ground through brackets, and the secondary tank is higher than the main tank. The lower part of the secondary tank is communicated with the inner cavity of the main tank through a connecting main pipe; one end of the main feed pipe is connected to the reaction tank, the other end of the main feed pipe is connected to the main tank, and the main feed pipe is also connected to the secondary tank through a side pipe; feeding ports are provided on the upper parts of both the main tank and the secondary tank.

[0006] Further, a discharge pipe is provided at the lower end of the main tank, and valves are provided on the main feed pipe, the connecting main pipe, the side pipe, and the discharge pipe.

[0007] Further, the valves are electric valves, and an on-line pH detector is provided in the middle of the main tank.

[0008] Further, a main stirrer is provided on the main tank, and a sub-stirrer is provided on the sub-tank. The main stirrer and the sub-stirrer are both provided with stirring paddles, and the stirring paddles extend into the main tank and the sub-tank respectively.

[0009] Further, the main connecting pipe is distributed outside the main tank in the vertical direction, and the main connecting pipe is connected to the inner cavity of the main tank through a plurality of connecting branch pipes.

[0010] Further, the volume of the sub-tank is 1 / 8 to 1 / 16 of the volume of the main tank.

[0011] Further, the installation position of the sub-tank is 1 m to 3 m higher than that of the main tank.

[0012] The beneficial effects of the present application: By configuring the main tank and the sub-tank, during the feeding of the manganese sulfate mixed solution, a part of the manganese sulfate mixed solution can be introduced into the sub-tank first, and the solution is mixed with calcium carbonate powder to form a suspension, and then added to the main tank. The suspension flows into the main tank through a plurality of connecting branch pipes, so that the calcium carbonate powder suspension is more easily distributed evenly in the main tank, thereby reducing the stirring and reaction time, shortening the waiting time, and cooperating with the on-line pH detector to realize automatic feeding. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] In the figure: 1-main tank, 2-sub-tank, 3-feed main pipe, 4-main connecting pipe, 5-by-pass pipe, 6-feeding port, 7-discharge pipe, 8-main stirrer, 9-sub-stirrer, 10-stirring paddle, 11-connecting branch pipe, 12-on-line pH detector. Detailed Embodiments

[0015] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0016] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0017] In addition, the descriptions involving "first", "second", etc. in this application are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the said features. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0018] As Figure 1 shown, an embodiment of the present utility model provides a calcium carbonate neutralization tank, including: a main tank 1, a secondary tank 2, and a main feed pipe 3. The main tank 1 and the secondary tank 2 are respectively installed on the ground through brackets, and the secondary tank 2 is higher than the main tank 1. The lower part of the secondary tank 2 is communicated with the inner cavity of the main tank 1 through a connecting main pipe 4; one end of the main feed pipe 3 is connected to the reaction tank, the other end of the main feed pipe 3 is connected to the main tank 1, and the main feed pipe 3 is also connected to the secondary tank 2 through a side pipe 5; feeding ports 6 are provided on the upper parts of both the main tank 1 and the secondary tank 2.

[0019] The manganese sulfate mixed solution flows from the reaction tank into the main tank 1 through the main feed pipe 3. At the same time, a part of the manganese sulfate mixed solution also flows into the secondary tank 2 through the side pipe 5. After the liquid level height in the secondary tank 2 reaches the set value, the valve on the side pipe 5 is closed, and then calcium carbonate powder is added to the secondary tank 2, and the secondary stirrer 9 is started. After the calcium carbonate powder is mixed with the manganese sulfate mixed solution in the secondary tank 2, a calcium carbonate suspension is obtained. At the same time, the main tank 1 continues to receive the manganese sulfate mixed solution. After the liquid level height in the main tank 1 reaches the set value, the valve on the main feed pipe 3 is closed, and then the valve on the connecting main pipe 4 is opened. At the same time, the main stirrer 8 is started. The calcium carbonate suspension uniformly flows into the main tank 1 through the connecting main pipe 4 and the connecting branch pipe 11, and with the agitation of the main stirrer 8, the calcium carbonate is quickly and evenly distributed in the main tank 1, enabling the calcium carbonate to react with the hydrogen ions in the manganese sulfate mixed solution to achieve the purpose of neutralization. After reacting for a period of time, the manganese sulfate mixed solution in the main tank 1 is detected by the on-line pH detector 12. If the pH is still low, then the calcium carbonate suspension is continuously injected. After multiple injections, the pH in the main tank 1 meets the requirements of the subsequent process. Through the secondary tank 2 of this device, the feeding can be synchronized with the preparation of the calcium carbonate suspension. Compared with the traditional direct input of calcium carbonate powder, the calcium carbonate suspension diffuses faster after being injected into the main tank 1, and can make the calcium carbonate evenly distributed in the main tank 1 faster, shortening the stirring and reaction time, thereby shortening the waiting time for pH value detection and improving the preparation efficiency.

[0020] Preferably, a discharge pipe 7 is provided at the lower end of the main tank 1, and valves are provided on the main feed pipe 3, the connecting main pipe 4, the bypass pipe 5, and the discharge pipe 7. Through the control of the valves, operations such as feeding and discharging can be achieved.

[0021] Preferably, the valve is an electric valve to facilitate remote control by the control system. An on-line pH detector 12 is provided in the middle of the main tank 1. The on-line pH detector 12 uses an existing commercially available on-line pH detector, and its probe extends into the main tank 1 to detect the solution in the main tank 1, so that the input amount of the calcium carbonate suspension is appropriate, and the subsequent filtration device is prevented from being blocked due to excessive feeding.

[0022] In a specific embodiment, a main stirrer 8 is provided on the main tank 1, and a sub-stirrer 9 is provided on the sub-tank 2. Both the main stirrer 8 and the sub-stirrer 9 are provided with stirring paddles 10, and the stirring paddles 10 extend into the main tank 1 and the sub-tank 2 respectively. The main stirrer 8 and the sub-stirrer 9 drive the stirring paddles 10 to rotate through motors, which can prevent the calcium carbonate in the calcium carbonate suspension from precipitating, and at the same time can accelerate the diffusion rate of calcium carbonate in the main tank 1 and improve the reaction rate.

[0023] In a preferred embodiment, the connecting main pipe 4 is distributed vertically outside the main tank 1, and the connecting main pipe 4 is connected to the inner cavity of the main tank 1 through a plurality of connecting branch pipes 11, so that the calcium carbonate suspension flows into the main tank 1 from different heights, and the calcium carbonate suspension can be quickly dispersed in the main tank 1.

[0024] Specifically, the volume of the sub-tank 2 is 1 / 8 to 1 / 16 of the volume of the main tank 1. The sub-tank 2 is mainly used for the preparation of the calcium carbonate suspension, and the required volume is not large. The small-volume sub-tank 2 requires a short feeding time, and the calcium carbonate suspension can be prepared during the feeding period of the main tank 1, so that the calcium carbonate suspension can flow into the main tank 1 after the feeding of the main tank 1 is completed.

[0025] Specifically, the installation position of the sub-tank 2 is 1 m to 3 m higher than that of the main tank 1, so that the calcium carbonate suspension in the sub-tank 2 can flow into the main tank 1 automatically under the action of gravity.

[0026] Of course, the present application can also have other various implementation manners. Based on this implementation manner, other implementation manners obtained by those of ordinary skill in the art without any creative work belong to the scope protected by the present application.

Claims

1. A calcium carbonate neutralization tank, characterized in that, include: A main tank (1), a sub-tank (2), and a feed pipe (3), wherein the main tank (1) and the sub-tank (2) are respectively installed on the ground through brackets, and the sub-tank (2) is higher than the main tank (1), and the lower part of the sub-tank (2) is connected to the inner cavity of the main tank (1) through a connecting pipe (4); one end of the feed pipe (3) is connected to the reaction tank, and the other end of the feed pipe (3) is connected to the main tank (1), and the feed pipe (3) is also connected to the sub-tank (2) through a bypass pipe (5); and the upper parts of the main tank (1) and the sub-tank (2) are both provided with a feed port (6).

2. A calcium carbonate neutralization tank according to claim 1, characterized in that, A discharge pipe (7) is provided at the lower end of the main tank (1), and valves are provided on the feed main pipe (3), the connecting main pipe (4), the side pipe (5) and the discharge pipe (7).

3. A calcium carbonate neutralization tank according to claim 2, characterized in that, The valve is an electric valve, and an online pH detector (12) is provided in the middle of the main tank (1).

4. A calcium carbonate neutralization tank according to claim 1, characterized in that, The main tank (1) is provided with a main agitator (8), and the auxiliary tank (2) is provided with an auxiliary agitator (9). Both the main agitator (8) and the auxiliary agitator (9) are provided with stirring paddles (10), and the stirring paddles (10) extend into the main tank (1) and the auxiliary tank (2) respectively.

5. A calcium carbonate neutralization tank according to claim 1, characterized in that, The connecting main pipe (4) is distributed outside the main tank (1) in the vertical direction, and the connecting main pipe (4) is connected to the inner cavity of the main tank (1) through a plurality of connecting branch pipes (11).

6. A calcium carbonate neutralization tank according to claim 1, characterized in that, The volume of the auxiliary tank (2) is 1 / 8 to 1 / 16 of the volume of the main tank (1).

7. A calcium carbonate neutralization tank according to claim 1, characterized in that: The installation position of the auxiliary tank (2) is 1m to 3m higher than the main tank (1).

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