Filtering device used before mixing of reaction raw material mixer

Abstract

The utility model discloses a filtering device before mixing of a reaction raw material mixer, which relates to the technical field of ester exchange reaction and comprises an ester exchange reaction tower, one side of the ester exchange reaction tower is fixedly connected with a first connecting pipeline, one side of the first connecting pipeline far away from the ester exchange reaction tower is fixedly connected with a venturi jet device, and the venturi jet device is fixedly connected with a second connecting pipeline far away from the ester exchange reaction tower. An amyl acetate buffer tank, a methanol buffer tank and a sodium methoxide buffer tank are arranged on one side, far away from the ester exchange reaction tower, of the Venturi jet device. According to the utility model, crystals separated from methanol and sodium methoxide solution are fixedly filtered through the filter frame, so that the solution entering the venturi jet device does not contain separated impurities, and the separated crystals can block a nozzle, a suction chamber or a diffuser pipe of the venturi jet device. After filtering, impurities are removed, fluid flows smoothly, and the blocking risk is remarkably reduced. And after the impurity-free solution enters the Venturi jet device, the fluid flows more smoothly and is more uniformly mixed.

Description

Technical Field

[0001] This utility model relates to the field of transesterification reaction technology, and in particular to a filtration device before mixing of reaction raw materials in a mixer. Background Technology

[0002] The reactant mixer in a transesterification reactor is a key piece of equipment in chemical production used to enhance the efficiency of transesterification reactions. Transesterification is the process of exchanging an ester with an alcohol, acid, or another ester to form a new ester. It is widely used in the production of biodiesel, plasticizers, lubricants, and polyesters. Transesterification is an important class of organic reactions in the chemical industry, with widespread applications in the production of biodiesel, plasticizers, lubricants, and polyesters.

[0003] However, in the existing transesterification reaction towers, the reactant mixers require amyl acetate, methanol, and sodium methoxide to be uniformly mixed before being fed into the tower. This process suffers from uneven mixing and sodium methoxide precipitation that can clog pipes. Uneven mixing reduces the contact area between reactants, decreasing the reaction rate. Furthermore, the precipitated sodium methoxide, being a solid, can block pipes or valves, causing feed interruptions and reducing equipment utilization.

[0004] To address the aforementioned issue of uneven mixing of amyl acetate, methanol, and sodium methoxide, a Venturi jet injector is added before the ester exchange tower. This solves the problem of uneven feedstock mixing. The Venturi jet injector consists of three parts: a nozzle, a suction chamber, and a diffuser. When methanol at a certain pressure is ejected at high speed through the nozzle, pressure energy is converted into velocity energy, creating a vacuum zone at the nozzle outlet. This negative pressure zone efficiently draws in amyl acetate and sodium methoxide, and the three fluid streams undergo intense turbulent mixing within the diffuser, maximizing the contact area.

[0005] However, during the mixing of the reactants, the precipitation and fixation of amyl acetate, methanol, and sodium methoxide may clog the Venturi ejector. The precipitated solids can block the nozzle, suction chamber, or diffuser, leading to poor fluid flow and reduced mixing efficiency. Moreover, clogging can prevent the Venturi ejector from generating the expected negative pressure, causing flow control failure and a significant decrease in system performance. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a filtration device before mixing in a reaction material mixer, which solves the problem of potential clogging of the Venturi jet injector during use.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A filtration device before mixing in a reaction feed mixer includes an ester exchange reaction tower. A connecting pipe is fixedly connected to one side of the ester exchange reaction tower. A Venturi ejector is fixedly connected to the side of the connecting pipe away from the ester exchange reaction tower. An amyl acetate buffer tank, a methanol buffer tank, and a sodium methoxide buffer tank are disposed on the side of the Venturi ejector away from the ester exchange reaction tower. The Venturi ejector is used to mix the liquids inside the amyl acetate buffer tank, the methanol buffer tank, and the sodium methoxide buffer tank. Through the Venturi ejector, amyl acetate, methanol, and sodium methoxide can be uniformly mixed and thus uniformly injected into the interior of the ester exchange reaction tower.

[0009] As a further improvement of this utility model, the bottom end of the amyl acetate buffer tank is fixedly connected to a second connecting pipe, and the end of the second connecting pipe away from the amyl acetate buffer tank is fixedly connected to the side of the Venturi ejector away from the first connecting pipe. The bottom end of the methanol buffer tank is fixedly connected to a third connecting pipe, which is located at the top of the Venturi ejector. The bottom end of the sodium methoxide buffer tank is fixedly connected to a fourth connecting pipe, and the end of the fourth connecting pipe away from the sodium methoxide buffer tank is fixedly connected to the top of the third connecting pipe. The introduction of connecting pipes two, three, and four allows for the efficient transfer of three different raw materials.

[0010] As a further improvement of this utility model, a top cover is fixedly connected to the bottom end of the connecting pipe three. A liquid inlet groove is provided at the center of the top of the top cover for the liquid to flow into the connecting pipe three. Two arc-shaped grooves are symmetrically formed through the top of the top cover. The arc-shaped grooves can effectively limit the position of the filter frame set at the bottom.

[0011] As a further improvement of this utility model, a retaining groove is also provided through the top of the top cover. An arc-shaped plate is movably connected inside each arc-shaped groove. Two retaining holes are symmetrically provided on one side of each of the two arc-shaped plates. A filter frame is fixedly connected to the bottom of each arc-shaped plate. The filter frame can effectively filter methanol and sodium methoxide solutions.

[0012] As a further improvement of this utility model, an insert fixing rod is slidably connected through the two locking holes. A through hole is formed at the center of each insert fixing rod, and the position of the through hole coincides with the locking groove in the vertical direction. A locking pin is inserted through the through hole and the locking groove. The locking pin ensures that the filter frame does not shift position during filtration.

[0013] As a further improvement of this utility model, a threaded groove is provided at the bottom of the inner part of the top cover, and a threaded plate is threadedly connected inside the threaded groove. The bottom end of the threaded plate is fixedly connected to the bottom cover, and a rotating groove is provided at the center of the bottom end of the bottom cover. The rotating groove is rotatably connected to the top of the Venturi jet. Through the threaded plate and the threaded groove, the filter device can be disassembled for replacement.

[0014] Compared with the prior art, the advantages of this utility model are as follows:

[0015] 1. Through the filter frame, after the methanol and sodium methoxide liquids mix at the intersection of connecting pipes three and four, they enter the top cover through the inlet tank. At this point, the simply mixed liquids are filtered by the filter frame, fixing any crystals precipitated in the methanol and sodium methoxide solution. This ensures that the solution entering the Venturi jet is free of precipitated impurities. Precipitated crystals can clog the nozzle, suction chamber, or diffuser of the Venturi jet. After filtration, impurities are removed, fluid flow is unobstructed, and the risk of clogging is significantly reduced. Furthermore, the impurity-free solution entering the Venturi jet results in smoother fluid flow and more uniform mixing. Impurities can also wear down the internal surface of the Venturi jet or accelerate corrosion. After filtration, wear and corrosion of the Venturi jet are reduced, extending its service life.

[0016] 2. Using locking pins, an arc-shaped plate, and an insertion fixing rod, the locking pins are passed through the arc-shaped groove in the top cover. Then, the insertion fixing rod is inserted into the locking hole to secure the arc-shaped plate. Finally, the locking pins are used to secure the insertion fixing rod to the top cover, thus fixing the filter frame inside the top cover. Compared to threaded replaceable filter devices, this method provides a more direct warning to operators when a problem occurs, such as liquid overflow. This direct warning allows operators to quickly recognize the problem and take timely measures to avoid safety hazards such as slips or corrosion caused by liquid overflow. Furthermore, operators can quickly clean or replace clogged filter devices, reducing downtime caused by blockages. The direct warning also helps to detect and resolve problems in their early stages, preventing more serious damage and reducing maintenance costs. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the top cover, bottom cover, and curved plate in this utility model.

[0019] Figure 3 In this utility model Figure 2 A schematic diagram of the three-dimensional structure from another angle.

[0020] Figure 4 In this utility model Figure 3 A three-dimensional structural diagram showing all components in their separated state.

[0021] Figure 5 In this utility model Figure 4 A schematic diagram of the three-dimensional structure from another angle.

[0022] In the diagram: 101, Ester exchange reaction tower; 102, Connecting pipe one; 103, Venturi jet injector; 104, Connecting pipe two; 105, Connecting pipe three; 106, Connecting pipe four; 107, Amyl acetate buffer tank; 108, Methanol buffer tank; 109, Sodium methoxide buffer tank; 201, Top cover; 202, Bottom cover; 203, Rotating groove; 204, Liquid inlet groove; 205, Arc groove; 206, Locking groove; 207, Locking nail; 208, Curved plate; 209, Locking hole; 210, Filter frame; 211, Insert fixing rod; 212, Through hole; 213, Threaded plate; 214, Threaded groove. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] As shown in the figure, a filtration device before mixing of reaction raw materials includes a Venturi jet injector 103, a locking pin 207, an arc plate 208, a locking hole 209, a filter frame 210, an insertion fixing rod 211, and a through hole 212.

[0026] First, the liquids inside the methanol buffer tank 108 and the sodium methoxide buffer tank 109 are mixed and fed into the top cover 201 through connecting pipes 3 (105) and 4 (106). At this time, the mixed liquid of sodium methoxide and methanol enters the top of the filter frame 210 through the inlet tank 204. The filter frame 210 filters the sodium methoxide and methanol solution, effectively filtering out any crystals that precipitate inside the mixed solution. The filtered liquid enters the Venturi ejector 103 through the rotating tank 203. Then, the liquid inside the amyl acetate buffer tank 107 is transferred to the Venturi ejector 103 through connecting pipe 2 (104). Through the mixing in the Venturi ejector 103, the mixed liquid of the three raw materials is then transferred to the ester exchange reaction tower 101 through connecting pipe 1 (102), thereby accelerating the flow of materials, preventing sodium methoxide from precipitating and clogging the Venturi ejector 103, and ensuring thorough mixing of the materials. When a pure solution enters the Venturi jet injector 103, the fluid flow is smoother and the mixing is more uniform. Impurities can also wear down the internal surface of the Venturi jet injector 103 or accelerate corrosion. After filtration, wear and corrosion of the Venturi jet injector 103 are reduced, and its service life is extended.

[0027] When liquid appears at the top of the top cover 201, it indicates a problem with the filtration inside the filter frame 210. Whether the filter frame 210 is clogged or filled with crystals, it needs to be replaced. At this time, rotate the bottom cover 202. Since the rotating groove 203 at the bottom of the bottom cover 202 is rotatably connected to the Venturi jet 103, the rotation of the bottom cover 202 will separate the top cover 201 and the bottom cover 202 through the threads of the threaded plate 213 and the threaded groove 214. Then, pull out the retaining pin 207 that is fixed at the top of the through hole 212 and the retaining groove 206, and then pull out the insertion fixing rod 211 through the retaining hole 209 to contact the fixing of the arc plate 208 in the through hole 212. Then, lower the filter frame 210 so that the arc plate 208 can be taken out along the arc groove 205. After taking it out, replace it with a new arc plate 208 and filter frame 210 to achieve the effect of replacing the clogged filter frame 210. Compared to threaded replaceable filters, this operation provides a more direct and intuitive alert to operators when a problem occurs, such as liquid spillage, indicating that the filter is clogged or full. Furthermore, the portable design makes replacing the filter frame 210 much faster, requiring no complicated tools or procedures, significantly reducing equipment downtime. Timely replacement of the filter frame 210 helps maintain equipment performance, reduces malfunctions caused by clogging or wear, and extends its service life.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A filtration device before mixing in a reaction feed mixer, comprising a transesterification reaction tower (101), characterized in that, A connecting pipe (102) is fixedly connected to one side of the transesterification reaction tower (101). A Venturi ejector (103) is fixedly connected to the side of the connecting pipe (102) away from the transesterification reaction tower (101). An amyl acetate buffer tank (107), a methanol buffer tank (108), and a sodium methoxide buffer tank (109) are provided on the side of the Venturi ejector (103) away from the transesterification reaction tower (101). The Venturi ejector (103) is used to mix the liquids inside the amyl acetate buffer tank (107), the methanol buffer tank (108), and the sodium methoxide buffer tank (109).

2. The filtration device before mixing in a reaction raw material mixer according to claim 1, characterized in that, The bottom end of the amyl acetate buffer tank (107) is fixedly connected to a second connecting pipe (104). The end of the second connecting pipe (104) away from the amyl acetate buffer tank (107) is fixedly connected to the side of the Venturi jet (103) away from the first connecting pipe (102). The bottom end of the methanol buffer tank (108) is fixedly connected to a third connecting pipe (105). The third connecting pipe (105) is located at the top of the Venturi jet (103). The bottom end of the sodium methoxide buffer tank (109) is fixedly connected to a fourth connecting pipe (106). The end of the fourth connecting pipe (106) away from the sodium methoxide buffer tank (109) is fixedly connected to the top of the third connecting pipe (105).

3. The filtration device before mixing in a reaction raw material mixer according to claim 2, characterized in that, The bottom end of the connecting pipe three (105) is fixedly connected to a top cover (201). A liquid inlet groove (204) is opened at the center of the top of the top cover (201). The liquid inlet groove (204) is used for liquid to flow into the connecting pipe three (105). Two arc-shaped grooves (205) are symmetrically opened through the top of the top cover (201).

4. The filtration device before mixing in a reaction raw material mixer according to claim 3, characterized in that, The top of the top cover (201) is also provided with a locking groove (206), and the inside of the arc groove (205) is movably connected with an arc plate (208). Two locking holes (209) are symmetrically opened on one side of the two arc plates (208), and a filter frame (210) is fixedly connected to the bottom of the arc plate (208).

5. The filtration device before mixing in a reaction raw material mixer according to claim 4, characterized in that, The two locking holes (209) are slidably connected to the insertion fixing rod (211). The center of the insertion fixing rod (211) is provided with a through hole (212). The position of the through hole (212) coincides with the locking groove (206) in the vertical direction. The through hole (212) and the locking groove (206) are provided with locking pins (207).

6. The filtration device before mixing in a reaction raw material mixer according to claim 5, characterized in that, The top cover (201) has a threaded groove (214) at the bottom inside. The threaded groove (214) is threadedly connected to a threaded plate (213). The bottom end of the threaded plate (213) is fixedly connected to a bottom cover (202). The bottom center of the bottom end of the bottom cover (202) has a rotating groove (203). The rotating groove (203) is rotatably connected to the top of the Venturi jet (103).

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