Buffer tank for stabilizing preliming liquid flow

Abstract

The utility model relates to the technical field of preliming liquid, and provides a buffer tank capable of stabilizing preliming liquid flow, which comprises a tank body, a first liquid discharge pipe, a second liquid discharge pipe, an exhaust pipe, a distillation tower, a liquid inlet pipe and a discharge device, the exhaust pipe is arranged at the outlet end of the first liquid discharge pipe and the outlet end of the second liquid discharge pipe, the exhaust pipe is communicated with the first liquid discharge pipe and the second liquid discharge pipe, the liquid inlet pipe is arranged on the lower side of the side wall of the distillation tower, and the liquid inlet pipe is communicated with the bottom end of the exhaust pipe; through the storage and buffer effects of the buffer tank and the liquid level difference formed between the first liquid discharge pipe and the liquid inlet pipe as well as between the second liquid discharge pipe and the liquid inlet pipe, the flow fluctuation when the pre-liming liquid flows into the distillation tower can be effectively reduced, so that the distillation efficiency and the product quality are improved, the stable pre-liming liquid flow is beneficial to reducing the impurity brought in in the distillation process, and the product quality is improved. The purity and the quality stability of the product are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pre-liming liquid, and particularly relates to a buffer tank for stabilizing the flow rate of pre-liming liquid. Background Art

[0002] In the process of producing soda ash by the ammonia-soda process, pre-liming liquid is the product of a key step, which is obtained by reacting hot mother liquor with lime milk in a pre-liming tank. The pre-liming liquid obtained after the reaction of hot mother liquor and lime milk in the pre-liming tank flows into the distillation tower by its own liquid level difference. Since the pre-liming liquid contains sediments such as back sand and lime milk, the flow rate of the pre-liming liquid flowing into the distillation tower by its own liquid level difference is unstable, resulting in fluctuations in the distillation tower, and further affecting the operating parameters of the distillation tower, such as temperature, pressure, etc., and ultimately leading to an increase in the ammonia content in the waste liquid and a shortening of the operating cycle of the distillation tower. In view of this, this application is specifically proposed. Content of the Utility Model

[0003] This application proposes a buffer tank for stabilizing the flow rate of pre-liming liquid to solve the technical problem that in the prior art, the pre-liming liquid flows into the distillation tower by its own liquid level difference, and due to the sediments such as back sand and lime milk in the pre-liming liquid, the flow rate of the pre-liming liquid flowing into the distillation tower by its own liquid level difference is unstable, resulting in fluctuations in the distillation tower. The above technical object of the utility model is achieved through the following technical solutions:

[0004] A buffer tank for stabilizing the flow rate of pre-liming liquid, comprising a tank body, a first drain pipe, a second drain pipe, an exhaust pipe, a distillation tower, a liquid inlet pipe and a discharging device. The first drain pipe and the second drain pipe are both arranged on the side wall of the tank body. The exhaust pipe is arranged at the outlet ends of the first drain pipe and the second drain pipe, and the exhaust pipe is communicated with the first drain pipe and the second drain pipe. The liquid inlet pipe is arranged at the lower side position of the side wall of the distillation tower, and the liquid inlet pipe is communicated with the bottom end of the exhaust pipe.

[0005] Preferably, the first drain pipe, the second drain pipe and the liquid inlet pipe are arranged in descending order successively.

[0006] Preferably, the discharging device includes a discharging port, and the discharging port is arranged at the bottom of the buffer tank.

[0007] Preferably, the upper part of the tank body is cylindrical, the lower part is inverted conical, and the upper part and the lower part of the tank body are integrally formed.

[0008] Preferably, a liquid inlet is arranged at a position on the side wall of the tank body far away from the first drain pipe.

[0009] Preferably, the volume of the tank body is 2-3 cubic meters.

[0010] Compared with the prior art, the beneficial effects of the present utility model include: through the storage and buffering functions of the buffer tank, and the liquid level difference formed between the first drain pipe and the second drain pipe and the inlet pipe, the flow rate fluctuation of the pre - lime liquid flowing into the distillation tower can be effectively reduced, thereby improving the distillation efficiency and product quality. The stable pre - lime liquid flow rate helps to reduce the impurity introduction during the distillation process, improve the purity and quality stability of the product. At the same time, by setting two drain pipes, the drainage volume can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] In the figure: 1, tank body; 2, first drain pipe; 3, second drain pipe; 4, exhaust pipe; 5, distillation tower; 6, inlet pipe; 7, discharge port; 8, liquid inlet. SPECIFIC EMBODIMENTS

[0013] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0014] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0015] To make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with specific embodiments and with reference to the drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well - known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0016] Please refer to the attach Figure 1, in some embodiments, a buffer tank for stabilizing the flow rate of pre-liming liquid includes a tank body 1, a first drain pipe 2, a second drain pipe 3, an exhaust pipe 4, a distillation column 5, a liquid inlet pipe 6 and a discharging device. The first drain pipe 2 and the second drain pipe 3 are both arranged on the side wall of the tank body 1. An inlet 8 is provided at a position on the side wall of the tank body 1 away from the first drain pipe 2. The volume of the tank body 1 is 2 - 3 cubic meters. The exhaust pipe 4 is arranged at the outlet ends of the first drain pipe 2 and the second drain pipe 3, and the exhaust pipe 4 is communicated with the first drain pipe 2 and the second drain pipe 3. The liquid inlet pipe 6 is arranged at the lower side position of the side wall of the distillation column 5, and the liquid inlet pipe 6 is communicated with the bottom end of the exhaust pipe 4. The first drain pipe 2, the second drain pipe 3 and the liquid inlet pipe 6 are arranged in descending order successively.

[0017] With the above technical solution, the pre-liming liquid obtained after the reaction of hot mother liquor and lime milk in the pre-liming bucket enters the buffer tank through the inlet 8, and then the pre-liming liquid enters the distillation column 5 through the first drain pipe 2, the second drain pipe 3 and the liquid inlet pipe 6 after passing through the buffer tank. The first drain pipe 2, the second drain pipe 3 and the liquid inlet pipe 6 are arranged in descending order successively, that is, the heights of the first drain pipe 2 and the second drain pipe 3 are higher than that of the liquid inlet pipe 6, which increases the liquid level difference between the pre-liming liquid and the discharged liquid of the distillation column 5. Due to the buffering effect of the buffer tank, the buffer tank has a relatively large volume and can absorb and store the pressure fluctuations generated during the flow of the pre-liming liquid.

[0018] When the flow rate of the pre-liming liquid suddenly increases or decreases, the liquid level in the buffer tank will change accordingly, thereby slowing down the direct impact of the fluid pressure on the distillation column 5, and the flow rate of the pre-liming liquid becomes stable. The buffer tank can also play a role in fluid separation, especially for the pre-liming liquid containing sediments such as back sand and lime milk. The pre-liming liquid flows into the distillation column 5 at a stable flow rate, reducing the fluctuations of the distillation column 5, stabilizing the distillation parameters such as temperature and pressure in the distillation column 5, improving the distillation efficiency, reducing the ammonia content in the waste liquid, extending the operation cycle of the distillation column 5, and improving the production efficiency and product quality.

[0019] Specifically, by setting the first drain pipe 2 and the second drain pipe 3, the liquid discharge amount of the buffer tank can be increased, and the working efficiency can be improved.

[0020] Specifically, during the process of obtaining the pre-liming liquid by the reaction of hot mother liquor and lime milk in the pre-liming bucket, ammonia gas will also be generated, and during the liquid discharge process, the ammonia gas is discharged through the exhaust pipe 4.

[0021] In some embodiments, the upper part of the tank body 1 is cylindrical, the lower part is inverted conical, and the upper and lower parts of the tank body 1 are integrally formed.

[0022] With the above technical solution, the upper part of the tank body 1 is cylindrical and the lower part is in the shape of an inverted cone, which is not only beautiful but also practical. The cylindrical upper part provides sufficient storage space, while the inverted cone-shaped lower part helps the sediment to settle, thus reducing the impurity content entering the distillation column 5. Under the guidance of gravity and shape, it flows to the inverted cone-shaped lower part, ensuring the smoothness of liquid discharge.

[0023] In some embodiments, the discharging device includes a discharging port 7, and the discharging port 7 is arranged at the bottom of the buffer tank.

[0024] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A buffer tank for stabilizing the flow rate of pre-liming liquid, characterized in that, It includes a tank body (1), a first liquid discharge pipe (2), a second liquid discharge pipe (3), an exhaust pipe (4), a distillation column (5), a liquid inlet pipe (6) and a discharging device. The first liquid discharge pipe (2) and the second liquid discharge pipe (3) are both arranged on the side wall of the tank body (1). The exhaust pipe (4) is arranged at the outlet ends of the first liquid discharge pipe (2) and the second liquid discharge pipe (3). The exhaust pipe (4) is communicated with the first liquid discharge pipe (2) and the second liquid discharge pipe (3). The liquid inlet pipe (6) is arranged at the lower side position of the side wall of the distillation column (5). The liquid inlet pipe (6) is communicated with the bottom end of the exhaust pipe (4).

2. A buffer tank for stabilizing the flow rate of pre-limed liquid according to claim 1, characterized in that, The first liquid discharge pipe (2), the second liquid discharge pipe (3) and the liquid inlet pipe (6) are arranged in descending order successively.

3. A buffer tank for stabilizing the flow rate of pre-limed liquid according to claim 1, characterized in that, The discharging device includes a discharge port (7), and the discharge port (7) is arranged at the bottom of the buffer tank.

4. A buffer tank for stabilizing the flow rate of pre-liming liquid according to claim 1, characterized in that, The upper part of the tank body (1) is cylindrical, and the lower part is inverted conical, and the upper part and the lower part of the tank body (1) are integrally formed.

5. A buffer tank for stabilizing the flow rate of pre-limed liquid according to claim 1, characterized in that, A liquid inlet (8) is arranged at a position on the side wall of the tank body (1) far from the first liquid discharge pipe (2).

6. A buffer tank for stabilizing the flow rate of pre-limed liquid according to claim 1, characterized in that The volume of the tank body (1) is 2-3 cubic meters.

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