Energy-saving hot melt adhesive reaction kettle

Abstract

The application discloses an energy-saving hot melt adhesive reaction kettle, which comprises a kettle body, a stirring shaft, a stirring paddle, a driving device, an inert gas input port arranged at the upper portion of the kettle body and connected with an inert gas source, a cyclone turbine fixedly installed on the stirring shaft and located below the inert gas input port, and blades of the cyclone turbine are inclined at an angle of 30-45 DEG for shearing the sprayed inert gas to form a cyclone; at least two layers of static mixing grids are arranged below the cyclone turbine and detachably connected to the inner wall of the kettle body, each layer of the static mixing grid is provided with a hole site, and the hole sites of adjacent layers of the mixing grids are arranged in a staggered mode. Through the synergistic effect of the cyclone turbine and the static mixing grid, the inert gas can be uniformly distributed in the whole reaction kettle to form a comprehensive protection layer, a stable environment is provided for the hot melt adhesive reaction, and the discoloration caused by oxidation is reduced; in addition, the stirring paddle and the stepped gap set are designed to enhance the turbulent degree of the materials, make the materials quickly and uniformly mixed, reduce the stirring time and stirring resistance, and realize effective energy saving.

Description

Technical Field

[0001] This utility model particularly relates to an energy-saving hot melt adhesive reaction vessel. Background Technology

[0002] Hot melt adhesives, as an environmentally friendly, solvent-free adhesive, are widely used in packaging, textiles, electronics, automotive, and other industries. Their production process is typically completed in a reactor, where heating and stirring thoroughly mix various raw materials to form a hot melt adhesive product with specific properties. To overcome the problem of hot melt adhesives easily reacting with oxygen in the air during production, the industry has attempted some improvements, such as introducing inert gases (like nitrogen) into the reactor to isolate oxygen. However, these measures often have the following shortcomings: simply introducing inert gas into the reactor through pipes cannot guarantee a uniform distribution of the inert gas throughout the reactor; some areas may still be exposed to air, leading to incomplete oxidation. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an energy-saving hot melt adhesive reactor.

[0004] To solve the aforementioned technical problems, this utility model adopts the following technical solution:

[0005] An energy-saving hot melt adhesive reactor includes a reactor body, a stirring shaft, and a stirring paddle mounted on the stirring shaft. A driving device is connected to the stirring shaft. The reactor body is characterized by: an inert gas inlet at the top, connected to an inert gas source; a vortex turbine fixedly mounted on the stirring shaft, located below the inert gas inlet, with blades tilted at an angle of 30°-45° to shear the injected inert gas into a vortex; and at least two layers of static mixing grids below the vortex turbine, detachably connected to the inner wall of the reactor body, each layer having perforations arranged alternately between adjacent layers.

[0006] Preferably, the stirring paddle has a U-shaped structure.

[0007] Preferably, the stirring paddle includes a left L-shaped stirring rod and a right L-shaped stirring rod, and a reinforcing plate is connected between the left L-shaped stirring rod and the right L-shaped stirring rod.

[0008] Preferably, the stirring paddle has radially distributed stepped notch groups on both sides, each group containing 3 rectangular notches, and the notch groups of the left L stirring rod and the right L stirring rod are arranged in a circumferentially staggered manner.

[0009] Preferably, it also includes a temperature measuring tube, which is fixed to the inner wall of the vessel by a support frame, and its axis is parallel to the stirring shaft.

[0010] Preferably, the driving device is a rotary motor.

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

[0012] This invention utilizes the synergistic effect of a swirling turbine and a static mixing grid to ensure that inert gas is evenly distributed throughout the entire reactor, forming a comprehensive protective layer. This provides a stable environment for the hot melt adhesive reaction, reducing problems such as discoloration, decreased viscosity, and increased hardness caused by oxidation, thus ensuring consistent product performance. Furthermore, the design of the stirring paddle and stepped notch assembly enhances material turbulence, enabling rapid and uniform mixing, reducing stirring time and resistance, lowering motor load, and achieving effective energy savings. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0014] Figure 1 This is a schematic diagram of the structure of an energy-saving hot melt adhesive reactor according to this application;

[0015] Figure 2 This is a top view of an energy-saving hot melt adhesive reactor according to this application. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0017] The orientation shown in the accompanying drawings should not be construed as limiting the specific protection scope of this utility model, but is only for reference and understanding of preferred embodiments. The product components shown in the drawings can be changed in position, increased in number, or simplified in structure.

[0018] The “connection” described in the specification and the “connection” relationship between the components shown in the accompanying drawings can be understood as a fixed connection, a detachable connection, or a connection that forms an integral unit; it can be a direct connection or a connection through an intermediate medium. Those skilled in the art can understand the connection relationship according to the specific circumstances and can derive different implementation methods such as screwing, riveting, soldering, snap-fitting, or embedding to suitably replace it.

[0019] The directional terms such as up, down, left, right, top, and bottom mentioned in the instruction manual and the directions shown in the attached drawings indicate that the components can directly contact each other or contact each other through other features; for example, "up" can mean directly above or diagonally above, or it simply means above other objects; other directions can be understood by analogy.

[0020] The materials used to manufacture solid-shaped parts as shown in the specification and drawings may be metallic, non-metallic, or other synthetic materials. The machining processes used for solid-shaped parts may include stamping, forging, casting, wire cutting, laser cutting, injection molding, CNC milling, 3D printing, machining, etc. Those skilled in the art may adapt or combine the above materials and manufacturing processes according to different processing conditions, costs, and precision requirements.

[0021] An energy-saving hot melt adhesive reactor, as described above Figures 1-2 The apparatus includes a vessel body 1, a stirring shaft 2, and a stirring paddle 3 mounted on the stirring shaft 2. A driving device is connected to the stirring shaft 2. The apparatus is characterized in that: an inert gas inlet 4 is provided on the upper part of the vessel body 1, the inert gas inlet 4 is connected to an inert gas source, a vortex turbine 5 is fixedly installed on the stirring shaft 2, the vortex turbine 5 is located below the inert gas inlet 4, and its blades 51 have an inclination angle of 30°-45°, which are used to shear the injected inert gas to form a vortex; at least two layers of static mixing grids 6 are provided below the vortex turbine 5, the static mixing grids 6 are detachably connected to the inner wall of the vessel body 1, each layer of static mixing grids 6 has holes, and the holes of adjacent mixing grids are arranged alternately.

[0022] Furthermore, the stirring paddle 3 has a U-shaped structure.

[0023] Furthermore, the stirring paddle 3 includes a left L-shaped stirring rod 31 and a right L-shaped stirring rod 32, and a reinforcing plate 310 is connected between the left L-shaped stirring rod 31 and the right L-shaped stirring rod 32.

[0024] Furthermore, the stirring paddle 3 has radially distributed stepped notch groups 33 on both sides, each group containing 3 rectangular notches, and the notch groups of the left L stirring rod 31 and the right L stirring rod 32 are arranged in a circumferentially staggered manner.

[0025] Furthermore, it also includes a temperature measuring tube 13, which is fixed to the inner wall of the vessel body 1 by a support frame 16, and its axial direction is parallel to the stirring shaft 2.

[0026] Furthermore, the driving device is a rotary motor 21.

[0027] The working principle of this utility model is as follows:

[0028] First, the vessel body 1 is horizontally and fixedly installed on a sturdy working platform to ensure its stability. The stirring shaft 2 is vertically installed inside the vessel body 1, ensuring a sealed connection between it and the vessel body 1 to prevent material leakage. The rotary motor 21 is connected to the stirring shaft 2 as a drive device, which can be achieved through a coupling, ensuring that the rotary motor can smoothly drive the stirring shaft 2 to rotate.

[0029] An inert gas inlet 4 is provided at the top of the vessel body 1, typically near the top. This design utilizes the fact that the density of inert gases is generally less than that of air (e.g., nitrogen is about 0.96 times denser than air), allowing them to diffuse downwards naturally upon entering the reactor, thus forming a protective layer from top to bottom. The inert gas inlet 4 is connected to an inert gas source, such as a nitrogen cylinder or nitrogen generator, via a pipe, and a flow regulating valve is installed on the pipe to precisely control the input quantity and flow rate of the inert gas. A vortex turbine 5 is fixedly mounted on the stirring shaft 2, located below the inert gas inlet 4. Ensure that the blade tilt angle of the vortex turbine 5 is 30°-45°. During installation, pay attention to maintaining a suitable distance between the vortex turbine 5 and the inert gas inlet 4, generally around 10-20 cm, to ensure that the inert gas is effectively sheared to form a vortex.

[0030] When the inert gas enters the reactor through the inert gas inlet 4, it first comes into contact with the vortex turbine 5. The blades 51 of the vortex turbine 5 are designed with an inclination angle of 30°-45°, which allows the inert gas to be sheared into multiple fine airflows under the action of the blades, forming a vortex. The rotation direction of the vortex turbine 5 is the same as the rotation direction of the stirring shaft 2. This arrangement allows the inert gas to diffuse downwards along the direction of the stirring shaft 2 while being sheared.

[0031] The main function of the static mixing grid 6 is to regulate the swirling flow generated by the swirling turbine 5. When the swirling flow generated by the swirling turbine 5 reaches the static mixing grid 6, the swirling flow is further dispersed into finer vortices through the staggered arrangement of the holes. These fine vortices are fully mixed with the material during the stirring process and are evenly distributed to all corners of the reactor, forming an all-round protective layer.

[0032] Based on the above technical solution, the stirring paddle 3 is designed with a U-shaped structure, including a left L-shaped stirring rod 31 and a right L-shaped stirring rod 32, with a reinforcing plate 310 connecting the two. This design allows the stirring paddle 3 to resist greater shear stress in the high viscosity region, i.e., the bottom region, due to the reinforcing plate 310, thus preventing deformation of the stirring paddle 3.

[0033] Based on the above technical solution, the U-shaped stirring paddle 3 has radially distributed stepped notch groups 33 on both sides, and the notch groups of the left L-shaped stirring rod 31 and the right L-shaped stirring rod 32 are staggered in the circumferential direction. This staggered design allows the material to form a complex flow path during the stirring process: when the notch group of the left L-shaped stirring rod 31 guides the material flow, the staggered notch group of the right L-shaped stirring rod 32 further changes the flow direction of the material, increasing the turbulence. The material repeatedly interweaves and collides between the notch groups of the two stirring rods, thereby achieving a more uniform mixing. The material here refers to the material used to produce hot melt adhesives, such as polymer bases, waxes, plasticizers, etc.

[0034] Based on the above technical solution, the temperature measuring tube 13 is fixedly installed on the inner wall of the reactor body 1 by the support frame 16, ensuring that the axial direction of the temperature measuring tube 13 is parallel to the stirring shaft 2. The position of the temperature measuring tube 13 should be selected in an area of ​​the reactor where the material temperature change is relatively sensitive, such as near the main reaction zone of the reactants or near the heating device, so as to accurately reflect the actual temperature inside the reactor.

[0035] This invention utilizes the synergistic effect of the swirl turbine 5 and the static mixing grid 6 to ensure that the inert gas is evenly distributed throughout the entire reactor, forming a comprehensive protective layer. This provides a stable environment for the hot melt adhesive reaction, reducing problems such as discoloration, decreased viscosity, and increased hardness caused by oxidation, thus ensuring consistent product performance. In addition, the design of the stirring paddle and stepped notch group enhances the turbulence of the material, enabling rapid and uniform mixing, reducing stirring time and resistance, lowering motor load, and achieving effective energy saving.

[0036] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the present invention without departing from the principles and spirit of the present invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for explanation only and not for limiting the present invention, but rather the scope of protection is defined by the content of the claims.

Claims

1. An energy-saving hot melt adhesive reaction vessel, comprising a vessel body (1), a stirring shaft (2), and a stirring paddle (3) disposed on the stirring shaft (2), wherein a driving device is connected to the stirring shaft (2), characterized in that: The upper part of the vessel body (1) is provided with an inert gas inlet (4), which is connected to an inert gas source. A vortex turbine (5) is fixedly installed on the stirring shaft (2). The vortex turbine (5) is located below the inert gas inlet (4), and its blades (51) have an inclination angle of 30°-45°, which is used to shear the injected inert gas to form a vortex. At least two layers of static mixing grids (6) are provided below the vortex turbine (5). The static mixing grids (6) are detachably connected to the inner wall of the vessel body (1). Each layer of static mixing grids (6) has holes, and the holes of adjacent mixing grids are staggered.

2. The energy-saving hot melt adhesive reactor according to claim 1, characterized in that, The stirring paddle (3) has a U-shaped structure.

3. The energy-saving hot melt adhesive reactor according to claim 2, characterized in that, The stirring paddle (3) includes a left L-shaped stirring rod (31) and a right L-shaped stirring rod (32), and a reinforcing plate (310) is connected between the left L-shaped stirring rod (31) and the right L-shaped stirring rod (32).

4. The energy-saving hot melt adhesive reactor according to claim 3, characterized in that, The stirring paddle (3) has radially distributed stepped notch groups (33) on both sides, each group containing 3 rectangular notches, and the notch groups of the left L stirring rod (31) and the right L stirring rod (32) are arranged in a circumferentially staggered manner.

5. The energy-saving hot melt adhesive reactor according to claim 1, characterized in that, It also includes a temperature measuring tube (13), which is fixed to the inner wall of the vessel body (1) by a support frame (16), and its axis is parallel to the stirring shaft (2).

6. The energy-saving hot melt adhesive reactor according to claim 1, characterized in that, The driving device is a rotary motor (21).

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