Furfuryl alcohol mixer

Abstract

A furfuryl alcohol mixer comprises a mixing cylinder and an inlet formed in one side of the mixing cylinder, the center side wall of the mixing cylinder approaches the center and is of an hourglass-shaped cavity structure which is vertically symmetrical with the center as the center, a flow mixing pipe is arranged in the upper portion of the hourglass-shaped cavity structure, and the lower end of the flow mixing pipe extends to the narrow portion in the middle of the hourglass-shaped cavity structure. The upper end of the flow mixing pipe extends out of the mixing barrel, and the lower end of the mixing barrel is a discharging end. According to the utility model, liquid furfuryl alcohol and gaseous hydrogen can be quickly compressed at a narrower part of the hourglass-shaped cavity structure, so that the liquid furfuryl alcohol and the gaseous hydrogen are fully excited by a hydrogen flow and are quickly and comprehensively mixed with the hydrogen, and the hydrogen can be quickly expanded to be filled with the liquid furfuryl alcohol, so that the gas phase and the liquid phase are more thoroughly mixed; the furfural, the hydrogen and the catalyst materials are uniformly mixed, so that the subsequent reaction is more thorough, and the product yield is effectively improved.

Description

Technical Field

[0001] This utility model relates to furfuryl alcohol production equipment, specifically a furfuryl alcohol mixer. Background Technology

[0002] In the production process of furfural, the mixing of furfural with hydrogen plays several key roles.

[0003] 1. Catalytic hydrogenation reaction:

[0004] Furfural can undergo catalytic hydrogenation with hydrogen in the presence of a catalyst. This reaction can change the chemical structure of furfural to produce valuable compounds such as furfuryl alcohol. Furfuryl alcohol is an important derivative of furfural and has wide applications in many industrial fields. The conditions for catalytic hydrogenation reactions usually include appropriate temperature, pressure and catalyst selection. These conditions need to be precisely controlled to ensure efficient reaction and product selectivity.

[0005] 2. Product selectivity:

[0006] By adjusting reaction conditions (such as temperature, pressure, and hydrogen concentration), the product selectivity of catalytic hydrogenation reactions can be affected. For example, under certain conditions, the reaction may mainly produce furfuryl alcohol, while under other conditions, other byproducts may be generated. Optimizing product selectivity is crucial for improving furfural conversion and product purity, which helps reduce production costs and improve the overall economics of the process.

[0007] 3. Reaction kinetics:

[0008] The kinetics of the mixed reaction of furfural and hydrogen involves the study of reaction rate and reaction mechanism. Understanding these kinetic parameters helps to optimize reaction conditions, improve reaction efficiency and product yield. The study of reaction kinetics can also provide guidance for the design and selection of catalysts to further improve the performance of catalytic hydrogenation reactions.

[0009] 4. The role of a catalyst:

[0010] In the mixed reaction of furfural and hydrogen, the selection and performance of the catalyst have a significant impact on the reaction results. A suitable catalyst can accelerate the reaction rate, improve product selectivity and yield, while the stability and regenerability of the catalyst are also key factors, as they directly affect the catalyst's lifespan and the economics of the process.

[0011] Currently, the mixing of furfural, hydrogen, and catalyst materials in pipelines is mainly achieved using T-junction pipes, but the mixing effect is not good, which easily leads to incomplete reaction. Utility Model Content

[0012] To address the aforementioned problems, the purpose of this invention is to provide a furfuryl alcohol mixer.

[0013] To achieve the above objectives, the technical solution of this utility model is as follows: a furfuryl alcohol mixer, comprising a mixing cylinder and an inlet disposed on one side of the mixing cylinder, the central sidewall of the mixing cylinder is close to the center, forming an hourglass-shaped cavity structure with the center as the upper and lower symmetrical, a mixing tube is disposed in the upper part of the hourglass-shaped cavity structure, the lower end of the mixing tube extends to the narrower middle part of the hourglass-shaped cavity structure, the upper end of the mixing tube extends to the outside of the mixing cylinder, and the lower end of the mixing cylinder is the discharge end.

[0014] Furthermore, the lower end of the mixing tube is tapered, and the tapered part of the mixing tube gradually narrows from top to bottom, with the inlet located on one side above the tapered part of the mixing tube.

[0015] Furthermore, a tapered deflector is provided at the lower end of the mixing cylinder.

[0016] Furthermore, a flange is fixed to the lower periphery of the fairing.

[0017] Furthermore, the ratio of the inner diameter of the middle part of the hourglass-shaped cavity structure to the inner diameter of the upper and lower ends is 1:3.

[0018] Furthermore, the mixing cylinder and mixing tube are made of stainless steel.

[0019] In operation, hydrogen gas enters the mixing tube through the inlet at the top. Because the tapered section of the mixing tube gradually narrows from top to bottom, and the ratio of the inner diameter of the middle section to the inner diameters of the upper and lower ends of the hourglass-shaped cavity is 1:3, the flow rate rapidly narrows in the middle of the hourglass-shaped cavity, effectively increasing the gas flow velocity. Furfural and the catalyst enter through the inlet. The incoming liquid impacts the outside of the upper end of the mixing tube, forming an annular liquid channel through the blocking and diversion of the mixing tube. The liquid continues downwards through the rapidly accelerating flow... The impact of the hydrogen flow causes the liquid furfuryl alcohol and gaseous hydrogen to be rapidly compressed in the narrower part of the hourglass-shaped cavity, thus fully activating them and rapidly and completely mixing them. After mixing, because the diameter of the lower part of the hourglass-shaped cavity gradually widens from top to bottom, the flow velocity of the liquid mixed with hydrogen decreases rapidly as it flows downwards, while the hydrogen expands rapidly to fill the liquid furfuryl alcohol. This results in a more thorough mixing of the gas and liquid phases, meaning that furfural, hydrogen, and catalyst materials are mixed evenly, which facilitates a more complete subsequent reaction and effectively improves the product yield. Attached Figure Description

[0020] The present invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of this utility model. Detailed Implementation

[0023] like Figure 1-2 As shown, a furfuryl alcohol mixer includes a mixing cylinder 1 and an inlet 2 disposed on one side of the mixing cylinder 1. The central sidewall of the mixing cylinder 1 is close to the center, forming an hourglass-shaped cavity structure 3 with the center as the upper and lower symmetrical structure, that is, both the upper and lower parts are conical structures with the tips facing each other, similar to an hourglass structure. A mixing tube 4 is disposed in the upper part of the hourglass-shaped cavity structure 3. The lower end of the mixing tube 4 extends to the narrower middle part of the hourglass-shaped cavity structure 3, while the upper end of the mixing tube 4 extends to the outside of the mixing cylinder 1. The lower end of the mixing cylinder 1 is the discharge end.

[0024] Specifically: The lower end of the mixing tube 4 is tapered, and the tapered part of the mixing tube 4 gradually narrows from top to bottom. The inlet 2 is located on one side above the tapered part of the mixing tube 4. The lower end of the mixing cylinder 1 is provided with a tapered flow guide shroud 5. A flange 6 is fixed around the lower end of the flow guide shroud 5. The ratio of the inner diameter of the middle part of the hourglass-shaped cavity structure 3 to the inner diameter of the upper and lower ends is 1:3. This allows the flow rate to narrow rapidly in the middle part of the hourglass-shaped cavity structure 3, thereby effectively increasing the flow velocity. The mixing cylinder 1 and the mixing tube 4 are made of stainless steel.

[0025] The working principle of this invention is as follows: Hydrogen gas enters the mixing tube 4 through the inlet at the upper end. Because the tapered section of the mixing tube 4 gradually narrows from top to bottom, and the ratio of the inner diameter of the middle part of the hourglass-shaped cavity structure 3 to the inner diameters of the upper and lower ends is 1:3, the flow rate can be rapidly narrowed in the middle of the hourglass-shaped cavity structure 3, thereby effectively increasing the gas flow velocity. Furfural and the catalyst enter through the inlet 2. After entering, the liquid impacts the outer upper end of the mixing tube 4, forming an annular liquid channel through the obstruction and diversion of the mixing tube 4. The liquid continues to flow downwards through a rapid... The accelerated hydrogen flow impact causes the liquid furfuryl alcohol and gaseous hydrogen to be rapidly compressed in the narrower part of the hourglass-shaped cavity structure 3, thus being fully excited by the hydrogen flow and rapidly and completely mixed with the hydrogen. After mixing, because the diameter of the lower part of the hourglass-shaped cavity structure 3 gradually widens from top to bottom, the flow velocity of the liquid mixed with hydrogen decreases rapidly as it flows downwards, while the hydrogen can quickly expand and fill the liquid furfuryl alcohol. This results in a more thorough mixing of the gas and liquid phases, that is, the furfural, hydrogen, and catalyst materials are mixed evenly, which facilitates a more thorough subsequent reaction and effectively improves the product yield.

[0026] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A furfuryl alcohol mixer, comprising a mixing cylinder (1) and an inlet (2) disposed on one side of the mixing cylinder (1), characterized in that: The central sidewall of the mixing cylinder (1) is close to the center, forming an hourglass-shaped cavity structure (3) with the center as the upper and lower symmetrical. A mixing pipe (4) is provided in the upper part of the hourglass-shaped cavity structure (3). The lower end of the mixing pipe (4) extends to the narrower middle part of the hourglass-shaped cavity structure (3), while the upper end of the mixing pipe (4) extends to the outside of the mixing cylinder (1). The lower end of the mixing cylinder (1) is the discharge end.

2. The furfuryl alcohol mixer as described in claim 1, characterized in that: The lower end of the mixing tube (4) is tapered, and the tapered part of the mixing tube (4) gradually narrows from top to bottom. The inlet (2) is located on the side above the tapered part of the mixing tube (4).

3. The furfuryl alcohol mixer as described in claim 1, characterized in that: A conical guide shroud (5) is provided at the lower end of the mixing cylinder (1).

4. A furfuryl alcohol mixer as described in claim 1, characterized in that: A flange (6) is fixed to the lower periphery of the fairing (5).

5. A furfuryl alcohol mixer as described in claim 1, characterized in that: The ratio of the inner diameter of the middle part of the hourglass-shaped cavity structure (3) to the inner diameter of the upper and lower ends is 1:

3.

6. A furfuryl alcohol mixer as described in claim 1, characterized in that: The mixing cylinder (1) and the mixing tube (4) are made of stainless steel.

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