Efficient hydrofluoric acid layering device for producing long-chain alkylbenzene

Abstract

The efficient hydrofluoric acid layering device comprises a liquid separation tank, one end of the liquid separation tank is fixedly connected with a feeding pipe, the feeding pipe extends into the liquid separation tank, the end of the feeding pipe is fixedly connected with a C-shaped pipe, the C-shaped pipe is horizontally arranged, the side wall of the inner side of the C-shaped pipe is provided with a long and narrow discharging opening, and the discharging opening is communicated with the liquid separation tank. A row of acid collecting bags and a row of oil collecting bags are fixedly connected to the side wall of the liquid separation tank, and the acid collecting bags and the oil collecting bags are symmetrically arranged up and down relative to the horizontal plane. According to the liquid separation device, the horizontally arranged C-shaped pipe is arranged, and the long and narrow opening is formed in one layer of the C-shaped pipe, so that conveyed materials are in a state similar to laminar flow, disturbance to liquid above and below the materials is small, and the liquid separation effect and efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid separators, in particular to a high-efficiency hydrofluoric acid separator for producing long-chain alkylbenzene. Background Art

[0002] During the production of long-chain alkylbenzenes, hydrofluoric acid is added as a catalyst. This catalyst needs to be separated from the reaction system for reuse. Hydrofluoric acid is typically separated using a liquid separation method. During this separation process, the quality of the hydrofluoric acid must be carefully considered to avoid contamination with previous raw materials or products, as this would interfere with the amount of hydrofluoric acid added during the current production process.

[0003] Therefore, due to the above situation, the present application proposes a hydrofluoric acid recovery and separation device to improve the separation efficiency and quality of the liquid separation. Summary of the Invention

[0004] To solve the above problems, the present invention discloses a high-efficiency hydrofluoric acid stratifier for producing long-chain alkylbenzene, comprising a separator, one end of the separator is fixedly connected with a feed pipe, the feed pipe extends to the interior of the separator, and the end is fixedly connected with a C-shaped tube, the C-shaped tube is horizontally arranged, and the side wall of the inner side is provided with a narrow and long discharge opening. Material enters the C-shaped tube from the feed pipe and is eventually sent out from the discharge port. Due to the horizontal arrangement of the C-shaped tube, the material enters the separator in a horizontally flat manner. This method makes the material sent into the separator present a state of "laminar flow" in the middle. With the disappearance of the kinetic energy of the material, the material is separated under the action of gravity, that is, heavier materials sink and lighter materials float. Here, hydrofluoric acid sinks, while oily materials float. In this stratification method, the material separation movement direction is perpendicular to the direction of sending into the separator, which greatly reduces the interference of material stratification.

[0005] A row of acid and oil collection bags are fixedly connected to the sidewalls of the liquid separator tank. These bags are symmetrically arranged vertically about the horizontal plane. The oil collection bags are located above the acid and oil collection bags. The arrangement of these bags further increases the vertical travel distance of the material. Furthermore, the small diameters of the acid and oil collection bags ensure that only liquids of the corresponding density can be stored within them.

[0006] Both ends of the C-shaped tube are fixedly connected with a second blind flange. Since the side wall of the C-shaped tube is open and bent, the second blind flange is required to seal the end to prevent the material sent out from the end from forming turbulence, etc., which affects the liquid separation of the material. Furthermore, during production, circular plates are used to weld and seal the two ends of the C-shaped tube, which can greatly reduce production costs.

[0007] The side wall of the separator tank is fixedly connected to an inspection port, which is located near the feed pipe and is provided with a first blind flange. Removing the first blind flange to expose the inspection port allows for easy observation of the specific structure of the C-shaped tube and ensures that no deformation or other problems occur during use.

[0008] The interiors of the acid collecting bag and the oil collecting bag are both fixedly connected with cross plates, which are used to prevent eddy currents from occurring in the acid collecting bag and the oil collecting bag during output.

[0009] The ends of the acid collecting bag and the oil collecting bag are fixedly connected with a discharge pipe. The separated material is finally sent out from the discharge pipe, and a flange is provided at the pipe mouth of the discharge pipe.

[0010] The beneficial effects of the present invention are as follows:

[0011] A horizontally arranged C-shaped tube is provided inside the liquid separation tank, and a narrow and long opening is provided on the inner side of the C-shaped tube, so that the material fed in is in a state similar to "laminar flow", which has little disturbance to the liquid above and below. After ensuring that the length of the liquid separation tank is long enough, the liquid is separated during the process of the kinetic energy of the "laminar flow" material disappearing, which is beneficial to improve the effect and efficiency of the liquid separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0013] Figure 2 This is a schematic diagram of the C-shaped tube structure of the present invention;

[0014] Figure 3 It is a partial cross-sectional schematic diagram of the present invention.

[0015] List of reference numerals:

[0016] 1. Feed pipe; 2. Separating tank; 3. Acid collecting bag; 4. Inspection port; 5. First blind flange; 6. Discharge pipe; 7. Oil collecting bag; 8. C-shaped pipe; 9. Second blind flange; 10. Discharge opening; 11. Cross plate. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0018] like Figures 1 to 3As shown, a high-efficiency hydrofluoric acid separator for producing long-chain alkylbenzenes includes a separator 2, which is a horizontally placed cylindrical structure. One end of the separator 2 is fixedly connected to a feed pipe 1, and the end of the feed pipe 1 is provided with a flange for connecting to an external pipeline. The feed pipe 1 extends into the interior of the separator 2 and the end is fixedly connected to a C-shaped tube 8. The C-shaped tube 8 is horizontally arranged, and the inner side wall is provided with a narrow discharge opening 10. That is, after the material enters the C-shaped tube 8 through the feed pipe 1, it enters the separator 2 from the discharge opening 10. Due to the horizontal arrangement of the C-shaped tube and the narrow discharge pipe 10, the material flows in the separator 2 in a flat manner, similar to "laminar flow". As the kinetic energy disappears, the material is also being separated.

[0019] A row of acid collection bags 3 and a row of oil collection bags 7 are fixedly connected to the side walls of the liquid separation tank 2. The acid collection bags 3 and the oil collection bags 7 are arranged symmetrically in the vertical direction. In other words, the acid collection bags 3 and the oil collection bags 7 increase the vertical travel distance of the material. At the same time, the pipe diameters of the acid collection bags 3 and the oil collection bags 7 are relatively small. The flowing material delivered by the C-shaped pipe 8 has negligible interference with the liquid inside the acid collection bags 3 and the oil collection bags 7, greatly improving the liquid separation effect.

[0020] Both ends of the C-shaped tube 8 are fixedly connected with a second blind flange 9. The second blind flange 9 is used to seal the C-shaped tube 8 to prevent the material from being sent out from the end and hitting the inside of the liquid separation tank 2 to generate turbulence, etc., which affects the liquid separation.

[0021] An inspection port 4 is fixedly connected to the side wall of the liquid separation tank 2, and the inspection port 4 is arranged close to the feed pipe 1, that is, the C-shaped tube 8 can be easily inspected and maintained from the inspection port 4. A first blind flange 5 is provided on the inspection port 4. When the first blind flange 5 is removed, the inspection port 4 is exposed.

[0022] The interiors of the acid collecting bag 3 and the oil collecting bag 7 are all fixedly connected with a cross plate 11. The cross plate 11 provided avoids eddy currents from occurring in the acid collecting bag 3 and the oil collecting bag 7, which causes remixing of materials.

[0023] The ends of the acid collecting bag 3 and the oil collecting bag 7 are fixedly connected with a discharge pipe 6. The end of the discharge pipe 6 is provided with a flange, which is connected to an external pipeline to send out the separated material.

[0024] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above-mentioned embodiment, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A high-efficiency hydrofluoric acid separator for producing long-chain alkylbenzenes, characterized in that: The invention comprises a liquid separation tank (2), one end of which is fixedly connected to a feed pipe (1), the feed pipe (1) extending into the interior of the liquid separation tank (2), and the end of which is fixedly connected to a C-shaped tube (8), the C-shaped tube (8) being arranged horizontally, and the inner side wall of which is provided with a narrow discharge opening (10); A row of acid collecting bags (3) and a row of oil collecting bags (7) are fixedly connected to the side wall of the liquid separation tank (2), and the acid collecting bags (3) and the oil collecting bags (7) are symmetrically arranged up and down with respect to a horizontal plane.

2. A method for producing long-chain alkylbenzene according to claim 1, wherein the high-efficiency hydrofluoric acid separator is characterized in that: Both ends of the C-shaped tube (8) are fixedly connected to a second blind flange (9).

3. a kind of production long-chain alkylbenzene according to claim 1 uses efficient hydrofluoric acid separator, it is characterized in that: The side wall of the liquid separation tank (2) is fixedly connected with an inspection port (4), and the inspection port (4) is arranged close to the feed pipe (1). A first blind flange (5) is provided on the inspection port (4).

4. A method for producing long-chain alkylbenzene according to claim 1, wherein the high-efficiency hydrofluoric acid separator is characterized in that: The acid collecting bag (3) and the oil collecting bag (7) are both fixedly connected to a cross plate (11) inside.

5. A method for producing long-chain alkylbenzene according to claim 1, wherein the high-efficiency hydrofluoric acid separator is characterized in that: The ends of the acid collecting bag (3) and the oil collecting bag (7) are both fixedly connected to a discharge pipe (6).

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