Liquid-phase multi-stream mixing system for jet bubbling reaction

Abstract

The utility model provides a liquid-phase multi-stream mixing system for jet bubbling reaction, which comprises a drainage tube, the drainage tube is sequentially connected with a diffusion tube and a flow stabilizing tube, an insertion tube is mounted on the side surface of the drainage tube and is a bent tube with a certain angle, and the inlet end of the insertion tube is perpendicular to the drainage tube. Compared with the prior art, the problem that multiple strands of fluid interfere with one another after being mixed can be solved, and stable flowing of a follow-up pipeline is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of chemical process intensification technology, specifically relating to a liquid phase multi-stream mixing system for jet bubbling reaction. Background Technology

[0002] In the chemical industry, chemical reactions are a crucial production process. To ensure sufficient contact and reaction of reactants within the reactor, internal fluid agitation is essential. Agitation equipment enables uniform distribution of reactants within the reactor, increasing reaction rate and efficiency. Therefore, stirred reactors are commonly used in the chemical industry for mass transfer control to enhance gas-liquid mass transfer. However, because the agitator shaft seal is a dynamic seal, and the chemical reactants are often highly corrosive, leaks frequently occur after years of operation, resulting in high operating and maintenance costs, safety hazards, and environmental pollution.

[0003] To address this problem, the concept of a novel jet bubbling reactor has been proposed in industry in recent years and has been successfully applied industrially. In a jet bubbling reactor, liquid is pumped into the reactor at high speed through a nozzle. The high-speed jet of liquid breaks up and disperses the bubbles. Simultaneously, the high-speed jet of liquid entrains surrounding liquid, causing flow in the bulk liquid phase within the reactor, effectively acting as a stirring impeller to drive the liquid circulation.

[0004] Currently, when replacing stirred reactors controlled by mass transfer in the chemical industry with jet bubbling reactors, the new reactor requires a significantly increased jet liquid volume. Therefore, during the modification of the peripheral system, multiple liquid streams need to be mixed and then concentrated before entering the jet reactor. However, due to the different pressures of the multiple fluids, conventional pipe merging methods are not feasible. Furthermore, the jet bubbling reactor requires a very large jet liquid volume, typically 1.4 to 1.5 times the circulating liquid flow rate of the existing stirred reactor. Therefore, during the modification of older equipment, problems such as mutual interference between fluids and limited pump discharge capacity frequently arise. Utility Model Content

[0005] The purpose of this invention is to provide a liquid-phase multi-stream mixing system for jet bubbling reaction, including a guide pipe, which is connected in sequence to a diffuser and a flow stabilizer. An insertion pipe is installed on the side of the guide pipe. The insertion pipe is a bend with a certain angle, and the inlet end of the insertion pipe is perpendicular to the guide pipe.

[0006] As a preferred embodiment of this utility model, the insertion tube is a 90° right-angle bend.

[0007] As a preferred embodiment of this invention, the diameter ratio of the flow stabilizing tube to the insertion tube is 1.2 to 2.0.

[0008] As a preferred embodiment of this invention, the diameter ratio of the flow stabilizing pipe to the flow diversion pipe is 1.2 to 1.5.

[0009] As a preferred embodiment of this invention, the diffuser tube is trumpet-shaped.

[0010] In a preferred embodiment of this invention, the outlet end of the insertion tube is located on the central axis of the drainage tube.

[0011] The beneficial effects of this utility model are:

[0012] Compared with existing technologies, this invention can solve the problem of interference between multiple fluids after mixing, ensuring smooth flow in subsequent pipelines. Attached Figure Description

[0013] Figure 1 This is a diagram of a multi-stream liquid-phase mixing system for jet bubbling reaction according to this invention.

[0014] In the diagram, 1-drainage tube, 2-diffuser tube, 3-flow stabilizing tube, 4-insertion tube. Detailed Implementation

[0015] 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.

[0016] like Figure 1 As shown, a liquid-phase multi-stream mixing system for jet bubbling reaction includes a guide pipe 1, which is connected in sequence to a diffuser 2 and a flow stabilizing pipe 3. An insertion pipe 4, which is a 90° right-angle bend, is installed on the side of the guide pipe, and its inlet end is perpendicular to the guide pipe 1. When modifying an old reactor in an acetic acid plant, the mixing of the external circulating liquid (fluid 1) and the mother liquor (fluid 2) is involved. The parameters of these two fluids are as follows:

[0017] 1) External circulating fluid: Flow rate Q1 is 300m³ 3 / h, pressure P1 is 3.4MPaG, pipe diameter D3 is DN250.

[0018] 2) Mother liquor: Flow rate Q2 is 250m³ 3 / h, pressure P2 is 3.37MPaG, pipe diameter D2 is DN200.

[0019] The mother liquor enters the mixing system perpendicularly at a 90° angle from the insertion pipe 4, and is discharged parallel to the external circulating liquid in the diffuser pipe 2. After the diffuser pipe expands, the diameter of the stabilizing pipe reaches DN300 (D1), at which point the flow velocity is 2.2 m / s, and the two fluids flow smoothly in the stabilizing pipe. The flow rate ratio of the external circulating liquid to the mother liquor, Q1 / Q2, is 1.2, the pressure ratio, P1 / P2, is 1.01, and the diameter ratio of the stabilizing pipe to the insertion pipe, D1 / D2, is 1.5.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A liquid-phase multi-stream mixing system for jet bubbling reaction, characterized in that, The liquid phase multi-stream mixing system includes a diversion pipe (1), which is connected in sequence to a diffuser pipe (2) and a flow stabilizing pipe (3). An insertion pipe (4) is installed on the side of the diversion pipe (1). The insertion pipe (4) is a bent pipe with a certain angle. The inlet end of the insertion pipe (4) is perpendicular to the diversion pipe (1).

2. The liquid-phase multi-stream mixing system according to claim 1, characterized in that, The insertion tube (4) is a 90° right-angle bend.

3. The liquid-phase multi-stream mixing system according to claim 1, characterized in that, The diameter ratio of the flow stabilizing tube (3) to the insertion tube (4) is 1.2 to 2.

0.

4. The liquid-phase multi-stream mixing system according to claim 1, characterized in that, The diameter ratio of the stabilizing pipe (3) to the drain pipe (1) is 1.2 to 1.

5.

5. The liquid-phase multi-stream mixing system according to claim 1, characterized in that, The diffuser tube (2) is trumpet-shaped.

6. The liquid-phase multi-stream mixing system according to claim 1, characterized in that, The outlet end of the insertion tube (4) is located on the central axis of the drainage tube (1).

Images