Diethyltoluene diamine solution filtration device

Abstract

The utility model discloses diethyltoluene diamine solution filter equipment relates to chemical equipment field. The diethyltoluene diamine solution filter equipment includes filter tank, buffer tank and siphon, and buffer tank is located filter tank one side and both are linked through siphon. The pretreatment assembly is equipped on filter tank, and including Y -shaped feed pipe, spiral pipe and buffer plate, and feed pipe has hydrochloric acid and raw liquid feed interface. The pressure regulating assembly is equipped on buffer tank, and contains gas storage tank and pressure regulating valve. The diethyltoluene diamine solution filter equipment passes through setting pretreatment assembly, and feed pipe adopts Y -shaped design, and the raw liquid is conveniently entered simultaneously with hydrochloric acid, and the contact area is increased in spiral pipe, and the reaction rate is effectively promoted, makes the reaction more fully, and lays good foundation for subsequent filter work. The setting of buffer plate can buffer feed impact, avoids the disturbance to the solution in filter tank, guarantees the stability of reaction.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment, and in particular to a diethyltoluenediamine solution filtration device. Background Technology

[0002] Currently, the preparation of diethyltoluenediamine (DETDA) stock solution leaves residual aromatic amine catalysts and derivatives (precipitate particles with a diameter of 2-8 μm), which need to be reacted with hydrochloric acid to be converted into precipitates and then separated. However, DETDA solution has special characteristics: viscosity at 25℃ is 8-12 mPa・s (medium viscosity, poor diffusivity), density is 1.02-1.05 g / cm³ (slightly greater than water), and the optimal reaction temperature is 30-35℃ (too high a temperature easily leads to oxidation and decomposition, while too low a temperature causes a sharp drop in reaction rate).

[0003] Existing filtration devices have two major problems:

[0004] Firstly, it was not adapted to medium viscosity, resulting in uneven mixing of DETDA and hydrochloric acid, slow local reaction, and precipitation time of up to 1-2 hours.

[0005] Secondly, the high-density sedimentation characteristics were not considered, and the impact of the feed easily caused the sediment to resuspend, resulting in the supernatant purity not meeting the standards (residual catalyst > 0.5%), which could not meet the downstream demand. Therefore, it is of great practical significance to develop a diethyltoluene diamine solution filtration device that can effectively solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a diethyltoluenediamine solution filtration device to solve the problem that the reaction between diethyltoluenediamine stock solution and hydrochloric acid in existing filtration devices is slow, resulting in a long precipitation time and hindering the continuity of production.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a diethyltoluene diamine solution filtration device includes a filter tank, a buffer tank, and a siphon tube. The buffer tank is disposed on one side of the filter tank. The siphon tube is connected to both the filter tank and the buffer tank. A pretreatment component is disposed on the filter tank. The pretreatment component includes a feed pipe, a spiral tube, and a buffer plate.

[0008] The feed pipe is a Y-shaped dual-control structure with a flow regulating valve, which can accurately control the reaction ratio of DETDA stock solution and hydrochloric acid at 10:1. The spiral tube is located below the feed pipe and is wrapped with an insulation layer on its outer wall to increase the contact area and enhance the mixing degree under medium viscosity through turbulence. The buffer plate is an arc-shaped structure and is located on one side of the spiral tube outlet to buffer the impact and reduce high-density sediment suspension.

[0009] Preferably, the filter tank is equipped with a stirring mechanism for stirring the mixture.

[0010] Preferably, the feed pipe includes a hydrochloric acid feed port, a raw liquid feed port, and a main pipe. The hydrochloric acid feed port and the raw liquid feed port are respectively fixedly connected to both sides of the main pipe and are both connected to the main pipe.

[0011] Preferably, the bottom end of the main tube is connected to the top end of the spiral tube.

[0012] Preferably, the buffer plate is fixedly connected to the side wall of the filter tank, and the buffer plate is located on the side of the bottom outlet of the spiral tube. The buffer plate is used to buffer the impact of feeding.

[0013] Preferably, one end of the siphon tube extends to the inner bottom of the filter tank, and a filter screen is provided at that end; the other end of the siphon tube extends into the interior of the buffer tank.

[0014] Preferably, the buffer tank is provided with a pressure regulating component, which includes an air storage tank and a pressure regulating valve. The pressure regulating valve is installed at the bottom of the air storage tank and is used to adjust the air pressure of the buffer tank to control the siphon tube to absorb the upper liquid of the filter tank into the buffer tank.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] 1. This diethyltoluene diamine solution filtration device, through the inclusion of a pretreatment component and a Y-shaped feed pipe design, facilitates the simultaneous entry of hydrochloric acid and the original solution. The increased contact area within the spiral tube effectively enhances the reaction rate, ensuring a more complete reaction and laying a solid foundation for subsequent filtration. The buffer plate buffers the feed impact, preventing disturbance to the solution within the filtration tank and guaranteeing reaction stability.

[0017] 2. This diethyltoluenediamine solution filtration device has a siphon tube extending to the bottom of the filter tank and equipped with a filter screen, which can effectively filter out solid impurities in the solution and prevent impurities from entering the buffer tank. Simultaneously, by adjusting the air pressure in the buffer tank through a pressure regulating component, the device can effectively control the siphon tube to absorb the upper layer of liquid from the filter tank into the buffer tank, achieving efficient and stable transfer of the solution. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the pretreatment component and pressure regulating component of this utility model;

[0021] Figure 3 This is a schematic diagram of the feed pipe structure of this utility model.

[0022] In the diagram: 1. Filter tank; 2. Pretreatment assembly; 21. Feed pipe; 211. Hydrochloric acid feed port; 212. Raw material feed port; 213. Main pipe; 22. Spiral pipe; 23. Buffer plate; 3. Buffer tank; 4. Siphon pipe; 5. Pressure regulating assembly; 51. Gas storage tank; 52. Pressure regulating valve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: This utility model provides the following... Figures 1-3 The diethyltoluene diamine solution filtration device shown includes a filter tank 1, a buffer tank 3 and a siphon tube 4. The buffer tank 3 is located on one side of the filter tank 1. The siphon tube 4 is connected to both the filter tank 1 and the buffer tank 3. A pretreatment component 2 is provided on the filter tank 1. The pretreatment component 2 includes a feed pipe 21, a spiral tube 22 and a buffer plate 23.

[0025] The feed pipe 21 is a Y-shaped dual-control structure with a flow regulating valve, which can accurately control the reaction ratio of DETDA stock solution and hydrochloric acid at 10:1. The spiral tube 22 is located below the feed pipe 21 and is wrapped with an insulation layer on its outer wall to increase the contact area and enhance the mixing degree under medium viscosity through turbulence. The buffer plate 23 is an arc-shaped structure and is located on the outlet side of the spiral tube 22 to buffer the impact and reduce high-density sediment suspension.

[0026] By incorporating the pretreatment component 2 and the Y-shaped design of the feed pipe 21, hydrochloric acid and the original solution can be introduced simultaneously. The increased contact area within the spiral tube 22 effectively enhances the reaction rate, ensuring a more complete reaction and laying a solid foundation for subsequent filtration. The buffer plate 23 buffers the feed impact, preventing disturbance to the solution within the filter tank 1 and guaranteeing reaction stability.

[0027] Furthermore, the filter tank 1 is equipped with a stirring mechanism, which is used to stir the mixture. The stirring mechanism in the filter tank 1 can fully stir the mixture, making the various components in the solution more uniformly mixed, further improving the reaction effect, helping impurities to be better separated from the solution, and improving the filtration quality.

[0028] Furthermore, the feed pipe 21 includes a hydrochloric acid feed port 211, a raw liquid feed port 212, and a main pipe 213. The hydrochloric acid feed port 211 and the raw liquid feed port 212 are respectively fixedly connected to both sides of the main pipe 213 and are both connected to the main pipe 213.

[0029] Furthermore, the bottom end of the main pipe 213 is connected to the top end of the spiral tube 22.

[0030] Furthermore, the buffer plate 23 is fixedly connected to the side wall of the filter tank 1, and the buffer plate 23 is located on the bottom outlet side of the spiral tube 22. The buffer plate 23 is used to buffer the feed impact. Hydrochloric acid and the stock solution enter the main pipe 213 through the hydrochloric acid inlet 211 and the stock solution inlet 212 of the feed pipe 21, respectively, and then flow into the spiral tube 22 below. In the spiral tube 22, the hydrochloric acid and the stock solution are in full contact. Due to the structure of the spiral tube 22, their contact area is increased, thereby improving the reaction rate. After the initial reaction, the solution flows out from the outlet of the spiral tube 22 and impacts the buffer plate 23. The buffer plate 23 buffers the impact force of the solution, allowing the solution to enter the filter tank 1 smoothly and avoiding large disturbances to the solution in the tank.

[0031] Example 2: This utility model provides the following... Figures 1-3 The diethyltoluene diamine solution filtration device shown includes a filter tank 1, a buffer tank 3, and a siphon tube 4. The buffer tank 3 is located on one side of the filter tank 1. The siphon tube 4 is connected to both the filter tank 1 and the buffer tank 3. A pretreatment component 2 is provided on the filter tank 1. The pretreatment component 2 includes a feed pipe 21, a spiral tube 22, and a buffer plate 23. The feed pipe 21 is Y-shaped. The spiral tube 22 is located below the feed pipe 21. The spiral tube 22 is used to increase the contact area to improve the reaction rate. The buffer plate 23 is located at the outlet of the spiral tube 22.

[0032] Furthermore, one end of the siphon tube 4 extends to the bottom inner side of the filter tank 1, and a filter screen is installed at this end. The other end of the siphon tube 4 extends into the interior of the buffer tank 3. The fact that one end of the siphon tube 4 extends to the bottom inner side of the filter tank 1 and is equipped with a filter screen effectively filters out solid impurities in the solution, preventing impurities from entering the buffer tank 3. Simultaneously, by adjusting the air pressure in the buffer tank 3 through the pressure regulating component 5, the siphon tube 4 can effectively control the absorption of the upper layer of liquid from the filter tank 1 into the buffer tank 3, achieving efficient and stable transfer of the solution.

[0033] Furthermore, a pressure regulating component 5 is provided on the buffer tank 3. The pressure regulating component 5 includes an air storage tank 51 and a pressure regulating valve 52. The pressure regulating valve 52 is installed at the bottom of the air storage tank 51 and is used to adjust the air pressure in the buffer tank 3 to control the siphon tube 4 to absorb the upper layer liquid from the filter tank 1 into the buffer tank 3. When it is necessary to transfer the filtered upper layer liquid, the pressure regulating component 5 adjusts the air pressure in the buffer tank 3. The pressure regulating valve 52 controls the air storage tank 51 to fill or release air into the buffer tank 3, changing the air pressure inside the buffer tank 3. When the air pressure inside the buffer tank 3 drops to a certain level, under the action of the siphon principle, the upper layer liquid in the filter tank 1 is absorbed into the buffer tank 3 through the siphon tube 4, realizing the transfer of the solution. By controlling the air pressure in the buffer tank 3, the transfer volume and speed of the solution can be accurately controlled, ensuring the stability and efficiency of the entire filtration process.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A diethyltoluenediamine solution filtration device, comprising a filter tank (1), a buffer tank (3), and a siphon tube (4), wherein the buffer tank (3) is disposed on one side of the filter tank (1), and the siphon tube (4) is connected to both the filter tank (1) and the buffer tank (3), characterized in that, The filter tank (1) is provided with a pretreatment component (2), which includes a feed pipe (21), a spiral pipe (22) and a buffer plate (23). The feed pipe (21) is a Y-shaped dual-control structure with a flow regulating valve, which can accurately control the reaction ratio of DETDA stock solution and hydrochloric acid at 10:

1. The spiral tube (22) is located below the feed pipe (21) and its outer wall is wrapped with a heat insulation layer to increase the contact area and enhance the mixing degree under medium viscosity through turbulence. The buffer plate (23) is an arc-shaped structure and is located on the outlet side of the spiral tube (22) to buffer the impact and reduce high-density sediment suspension.

2. The diethyltoluenediamine solution filtration device according to claim 1, characterized in that, The filter tank (1) is equipped with a stirring mechanism, which is used to stir the mixture.

3. The diethyltoluenediamine solution filtration device according to claim 1, characterized in that, The feed pipe (21) includes a hydrochloric acid feed port (211), a raw liquid feed port (212), and a main pipe (213). The hydrochloric acid feed port (211) and the raw liquid feed port (212) are respectively fixedly connected to both sides of the main pipe (213) and are connected to the main pipe (213).

4. The diethyltoluenediamine solution filtration device according to claim 3, characterized in that, The bottom end of the main tube (213) is connected to the top end of the spiral tube (22).

5. The diethyltoluenediamine solution filtration device according to claim 1, characterized in that, The buffer plate (23) is fixedly connected to the side wall of the filter tank (1), and the buffer plate (23) is located on the side of the bottom outlet of the spiral tube (22). The buffer plate (23) is used to buffer the impact of feeding.

6. The diethyltoluenediamine solution filtration device according to claim 1, characterized in that, One end of the siphon tube (4) extends to the bottom of the inner side of the filter tank (1), and a filter screen is provided at that end. The other end of the siphon tube (4) extends into the interior of the buffer tank (3).

7. The diethyltoluenediamine solution filtration device according to claim 1, characterized in that, The buffer tank (3) is provided with a pressure regulating component (5), which includes an air storage tank (51) and a pressure regulating valve (52). The pressure regulating valve (52) is installed at the bottom of the air storage tank (51) and is used to adjust the air pressure of the buffer tank (3) to control the siphon to absorb the upper liquid of the filter tank (1) into the buffer tank (3).

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