A double-helix stirring shaft type chemical reactor

Abstract

This utility model discloses a double-spiral stirring shaft chemical reactor, relating to the field of chemical equipment. The double-spiral stirring shaft chemical reactor includes a reaction vessel, on which a cover plate is detachably connected by fixing bolts. It also includes symmetrically arranged feed cylinders located inside the reaction vessel and fixedly connected to the cover plate. This utility model utilizes a variable diameter structure (larger at the bottom, smaller at the top) for the feed cylinder and spiral blades. As the material is conveyed upwards, its flow velocity increases, resulting in high-speed ejection from the discharge pipe, forming strong turbulence that breaks up material agglomerates. Simultaneously, the spiral blades, in conjunction with the feed cylinder, circulate the material within the reaction vessel. Compared to traditional stirring methods, this significantly shortens the time required for uniform mixing. Furthermore, a booster pump releases bubbles at the bottom of the reaction vessel via a jet nozzle. The disturbance generated by the rising and bursting of these bubbles, combined with the material circulation driven by the spiral blades, enhances the mixing effect from multiple directions and scales, further improving reaction efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, specifically, it relates to a double-helix stirring shaft type chemical reactor. Background Technology

[0002] As a key piece of equipment for chemical reactions, the performance of the reactor plays a decisive role in the reaction effect. Many chemical reaction processes, such as polymerization and esterification, have high requirements for the uniformity of mixing and the sufficiency of reaction of materials in the reactor. Good mixing effect can not only promote the full contact of reactants and increase the reaction rate, but also ensure the stability of product quality.

[0003] Currently, in order to make the materials react evenly and fully, a mixing mechanism is added to the reaction vessel. However, the existing mixing mechanism only uses the stirring blades to mix the materials, which makes the flow path of the materials in the vessel relatively simple. It is impossible to achieve efficient and uniform mixing of the materials in the whole vessel in a short time, resulting in low mixing efficiency, extended reaction time, increased energy consumption and production costs. In view of this, this utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a double-helix stirring shaft chemical reactor that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] A double-spiral stirring shaft type chemical reactor includes a reaction vessel with a cover plate detachably connected to it by fixing bolts. It also includes: symmetrically arranged feed cylinders located inside the reaction vessel and fixedly connected to the cover plate; a rotating shaft rotatably connected to the feed cylinders; spiral blades fixedly mounted on the rotating shaft; wherein the lower end of the feed cylinder has a feed inlet, and the upper end has multiple discharge pipes fixedly connected at equal intervals around its circumference; a hollow cavity formed at the bottom of the reaction vessel, wherein multiple sets of air nozzles are equidistantly arranged on the inner wall of the bottom of the reaction vessel; and a booster pump fixedly mounted on the reaction vessel, wherein the output end of the booster pump is connected to the hollow cavity through a gas supply pipe.

[0007] Preferably, a motor is fixedly installed on the cover plate, and gears that mesh with each other are fixedly installed on the output end of the motor and the end of the rotating shaft that passes through the upper end of the cover plate.

[0008] Preferably, the diameters of the conveying cylinder and the spiral blades decrease from bottom to top.

[0009] To improve the sealing at the connection between the cover plate and the reaction vessel, preferably, a sealing ring is fixedly installed on the cover plate, and a sealing ring is provided on the outer wall of the sealing ring, which fits against the inner wall of the reaction vessel.

[0010] To maintain a constant internal pressure in the reaction vessel, preferably, a pressure relief pipe is fixedly connected to the upper side wall of the reaction vessel, and a pressure relief valve is installed on the pressure relief pipe.

[0011] To facilitate the discharge of fully reacted materials from the reaction vessel, preferably, the bottom inner wall of the reaction vessel is conical, and a discharge pipe is fixedly connected to the bottom of the reaction vessel, with a valve switch installed on the discharge pipe.

[0012] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0013] This invention, through the arrangement of the feed cylinder and the spiral blades with decreasing diameters from bottom to top, narrows the channel and increases the flow velocity of the material as it flows upward, ultimately resulting in a high-speed ejection from the discharge pipe to form strong turbulence. This effectively breaks up material agglomeration and clumping, achieving rapid and uniform dispersion. At the same time, the spiral blades and the feed cylinder work together to make the material circulate from bottom to top within the reaction tank. Compared with traditional stirring methods, this can achieve uniform stirring of the entire tank of material in a shorter time, improving mixing efficiency and uniformity.

[0014] The booster pump delivers gas into the hollow cavity through the gas delivery pipe, and the gas is ejected through the bottom nozzle to generate bubbles. As the bubbles rise, the buoyancy causes the surrounding materials to move. When the bubbles burst, they generate an impact force that disturbs the materials. At the same time, the bubble disturbance and the material circulation flow caused by the spiral blades are superimposed on each other, mixing the materials from different directions and scales, further improving the mixing uniformity and reaction efficiency. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the reaction vessel and conveying cylinder of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the feed cylinder and spiral blades of this utility model;

[0018] Figure 4 This is a utility model Figure 1 Enlarged view of part A in the middle.

[0019] In the diagram: 1. Reaction vessel; 101. Cover plate; 102. Discharge pipe; 2. Feeding cylinder; 201. Rotating shaft; 202. Spiral blade; 203. Feed inlet; 204. Discharge pipe; 205. Gear; 3. Motor; 4. Hollow cavity; 401. Air nozzle; 402. Booster pump; 403. Gas supply pipe; 404. Pressure relief pipe; 5. Sealing ring; 501. Sealing ring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0021] Example 1

[0022] Reference Figure 1 , Figure 2 , Figure 3 A double-spiral stirring shaft type chemical reactor includes a reaction vessel 1, a cover plate 101 detachably connected to the reaction vessel 1 by fixing bolts, and further includes: symmetrically arranged feed cylinders 2, located inside the reaction vessel 1 and fixedly connected to the cover plate 101; a rotating shaft 201, rotatably connected to the feed cylinder 2; spiral blades 202, fixedly installed on the rotating shaft 201, wherein the lower end of the feed cylinder 2 has a feed inlet 203 and the upper end has multiple discharge pipes 204 fixedly connected at equal intervals around its circumference; a hollow cavity 4, opened at the bottom of the reaction vessel 1, wherein multiple sets of air nozzles 401 are equidistantly arranged on the inner wall of the bottom of the reaction vessel 1; and a booster pump 402, fixedly installed on the reaction vessel 1, wherein the output end of the booster pump 402 is connected to the hollow cavity 4 through a gas supply pipe 403.

[0023] A motor 3 is fixedly installed on the cover plate 101. Gears 205 that mesh with each other are fixedly installed on the output end of the motor 3 and the end of the shaft 201 that passes through the upper end of the cover plate 101.

[0024] The diameters of the conveying cylinder 2 and the spiral blades 202 decrease from bottom to top.

[0025] In use, the cover plate 101 is removed from the reaction vessel 1 by unscrewing the fixing bolts. The liquid or solid-liquid mixture of reactants is injected into the reaction vessel 1 through the opening at the upper end of the reaction vessel 1. After the injection is completed, the cover plate 101 is reinstalled on the reaction vessel 1 and the fixing bolts are tightened to ensure that the reaction vessel 1 forms a relatively closed space, to avoid material leakage during the reaction, to ensure operational safety, and to create a stable environment for subsequent reactions.

[0026] When motor 3 is started, it begins to run, and the gear 205 at its output end rotates accordingly. Since the gear 205 at one end of the two rotating shafts 201 passing through the upper part of the cover plate 101 meshes with the gear 205 at the output end of motor 3, motor 3 can drive the two rotating shafts 201 to rotate synchronously. The rotation of the rotating shafts 201 drives the spiral blades 202 on them to rotate synchronously. At this time, the material in the reaction tank 1 is sucked in through the feed inlet 203 at the bottom of the conveying cylinder 2. Driven by the spiral blades 202, the material flows upward along the conveying cylinder 2. Due to the interaction between the conveying cylinder 2 and the spiral blades 202, the material... The diameter of the conveyor cylinder 2 decreases from bottom to top. According to the principle of fluid continuity, as the material flows upward, the channel gradually narrows and the flow velocity gradually increases. Finally, the material is ejected at high speed from the discharge pipe 204 at the top of the conveyor cylinder 2, forming a strong turbulent impact on the material in the reaction tank 1, effectively breaking up agglomerates and lumps, and achieving rapid and uniform dispersion. At the same time, with the cooperation of the spiral blades 202 and the conveyor cylinder 2, the material circulates in the reaction tank 1. Compared with the traditional stirring method, it can ensure that the material in the entire reaction tank 1 is uniformly stirred in a shorter time, which greatly improves the mixing efficiency and uniformity.

[0027] Simultaneously, the booster pump 402 is activated, which delivers gas to the hollow cavity 4 through the gas delivery pipe 403. After the gas accumulates in the hollow cavity 4, it is ejected through multiple sets of jet nozzles 401 equidistantly arranged on the inner circumference of the bottom of the reaction tank 1. The ejected gas generates bubbles in the material in the reaction tank 1. As the bubbles rise, they will move the surrounding material due to buoyancy, forming a local fluid flow. When the bubbles rise to the surface of the material and break, they will generate an impact force, further disturbing the material. This movement of bubbles and the disturbance generated by their breakage, combined with the circulation of the material from bottom to top in the reaction tank 1 caused by the spiral blades 202, superimposes the effect, enabling the material to be mixed from different directions and scales, further improving the uniformity of material mixing and the efficiency of the reaction.

[0028] Example 2

[0029] Reference Figure 1 , Figure 4 A double-helix stirring shaft type chemical reactor is basically the same as that in Example 1. Furthermore, a sealing ring 5 is fixedly installed on the cover plate 101, and a sealing ring 501 is provided on the outer wall of the sealing ring 5. The sealing ring 501 is in contact with the inner wall of the reaction vessel 1.

[0030] When the cover plate 101 is installed on the reaction vessel 1, the sealing ring 5 and the sealing ring 501 are inserted into the reaction vessel 1 together. As the cover plate 101 and the reaction vessel 1 are gradually tightened by the fixing bolts, the sealing ring 501 is squeezed by the sealing ring 5 and fits tightly against the inner wall of the reaction vessel 1, thereby achieving a seal on the reaction vessel 1. This effectively prevents external impurities from entering the reaction vessel 1, maintains the purity and stability of the reaction system, and ensures that the reaction proceeds smoothly under the expected environmental conditions.

[0031] The upper end side wall of the reaction vessel 1 is fixedly connected to a pressure relief pipe 404, and a pressure relief valve is installed on the pressure relief pipe 404;

[0032] During the reaction, when the pressure inside the reaction tank 1 rises above the set pressure value of the pressure relief valve due to exothermic reaction, gas generation, etc., the pressure relief valve will automatically open. At this time, the gas or steam inside the reaction tank 1 will be discharged through the pressure relief pipe 404, reducing the pressure inside the reaction tank 1. When the pressure drops below the set value, the pressure relief valve will automatically close, maintaining the pressure inside the reaction tank 1 and effectively preventing safety accidents such as explosions caused by excessive pressure inside the reaction tank 1, thus ensuring the safety of operators and equipment.

[0033] Example 3

[0034] Reference Figure 1 A double-helix stirring shaft chemical reactor is basically the same as in Example 1. Furthermore, the bottom inner wall of the reactor 1 is conical, and the bottom of the reactor 1 is fixedly connected to a discharge pipe 102, which is equipped with a valve switch.

[0035] During the reaction, the materials are mixed and reacted in the reaction tank 1. After the reaction is completed, the valve switch on the discharge pipe 102 is opened. Since the inner wall of the bottom of the reaction tank 1 is conical, the reaction products can smoothly gather at the discharge pipe 102 under the action of gravity and be discharged from the reaction tank 1 through the discharge pipe 102, reducing the residue of materials at the bottom of the reaction tank 1, which facilitates the subsequent cleaning of the inside of the reaction tank 1 and reduces the cleaning difficulty and cost.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model.

Claims

1. A double helix stirring shaft type chemical reaction kettle, comprising a reaction tank (1), a cover plate (101) is detachably connected to the reaction tank (1) through fixing bolts, characterized in that, Also includes: The symmetrically arranged feed cylinders (2) are located inside the reaction vessel (1) and are fixedly connected to the cover plate (101); A rotating shaft (201) is rotatably connected in the conveying cylinder (2); The spiral blade (202) is fixedly installed on the rotating shaft (201). The lower end of the conveying cylinder (2) is provided with a feed inlet (203), and the upper end is circumferentially connected with multiple discharge pipes (204). A hollow cavity (4) is formed at the bottom of the reaction vessel (1), wherein multiple sets of jet nozzles (401) are equidistantly arranged on the inner circumference of the bottom of the reaction vessel (1). A booster pump (402) is fixedly installed on the reaction vessel (1), wherein the output end of the booster pump (402) is connected to the hollow cavity (4) through a gas supply pipe (403).

2. A twin helix agitator shaft chemical reactor according to claim 1, characterized in that, A motor (3) is fixedly installed on the cover plate (101). The output end of the motor (3) and the end of the shaft (201) that passes through the upper end of the cover plate (101) are both fixedly equipped with gears (205) that mesh with each other.

3. The double helical agitator shaft type chemical reaction vessel according to claim 1, characterized in that, The diameters of the feed cylinder (2) and the spiral blades (202) decrease from bottom to top.

4. The double helical agitator shaft type chemical reaction vessel according to claim 1, characterized in that, A sealing ring (5) is fixedly installed on the cover plate (101), and a sealing ring (501) is provided on the outer wall of the sealing ring (5). The sealing ring (501) is in contact with the inner wall of the reaction vessel (1).

5. The double helical agitator shaft type chemical reaction vessel according to claim 1, characterized in that, The upper end side wall of the reaction vessel (1) is fixedly connected to a pressure relief pipe (404), and a pressure relief valve is provided on the pressure relief pipe (404).

6. The double helical agitator shaft type chemical reaction vessel according to claim 1, wherein The bottom inner wall of the reaction vessel (1) is conical, and the bottom of the reaction vessel (1) is fixedly connected to a discharge pipe (102), which is equipped with a valve switch.

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