Devolatilization equipment

Abstract

The present invention provides devolatilization equipment, and relates to the technical field of industrial equipment, the devolatilization equipment comprises an equipment cylinder with a feed inlet at the top, and the top of the equipment cylinder is provided with a vacuumizing pipe orifice; the steam stripping mechanism and the four-inclined-blade stirrer are arranged in the equipment barrel; compared with the prior art, the steam stripping mechanism is arranged at the bottommost part in the equipment barrel, so that a steam stripping mode is adopted, gas-liquid balance is broken, volatile components are promoted to be transferred from a liquid phase to a gas phase, in the volatile component transferring process, materials are stirred by utilizing the four-inclined-blade stirrer, and the shearing force of the four-inclined-blade stirrer is relatively large, so that the volatile components are separated from one another; the volatile component can be better volatilized from a liquid phase, then the volatilization area of the liquid phase is increased through the three-inclined-cylinder splashing device, full volatilization of the volatile component is better facilitated, therefore, the volatilization efficiency and the volatilization amount are guaranteed, and the purity and the quality of a product are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial equipment, and particularly to a devolatilization device. Background Art

[0002] A devolatilization device is a device used to remove solvents and impurities from high-molecular materials. It can effectively remove solvents and impurities in materials, improve the performance and quality of products, and has wide applications in the production of industries such as plastics, rubber, and chemical fibers. During the product purification process, removing volatile components is an important task. Currently, the existing devolatilization devices are simple storage tank devolatilization, with a low devolatilization rate for products. They do not have functions such as stirring and shearing, controlling the volatilization area, and controlling phase equilibrium. However, it is difficult to remove volatile components, and better control of liquid-phase shearing, volatilization area, and phase equilibrium is required. Summary of the Invention

[0003] To solve the deficiencies of the above prior art, the present invention proposes a devolatilization device with a reasonable structure, easy to assemble, having functions of controlling liquid-phase shearing, controlling liquid-phase volatilization area, and controlling phase equilibrium, and having a good devolatilization effect on products.

[0004] The technical solution of the present invention is realized as follows: A devolatilization device includes a device cylinder body with a feed inlet at the top, and a vacuum extraction pipe orifice is arranged at the top of the device cylinder body;

[0005] It further includes a stripping mechanism and a four-oblique-blade stirrer arranged inside the device cylinder body, wherein:

[0006] The stripping mechanism includes a concentrically arranged inner stripping pipe and an outer stripping pipe, and an inner and outer stripping pipe support rod connecting the inner stripping pipe and the outer stripping pipe. One side of the inner stripping pipe and the outer stripping pipe is commonly connected with a stripping inlet pipe, and the inner stripping pipe and the outer stripping pipe are both provided with evenly distributed stripping holes;

[0007] The four-oblique-blade stirrer is arranged above the stripping mechanism, and the four-oblique-blade stirrer includes a four-oblique-blade hoop and four oblique-blade paddle blades installed on the outer circumference of the four-oblique-blade hoop. The device cylinder body is also provided with a power component for driving the rotation of the four oblique-blade paddle blades.

[0008] Preferably, the power component includes a stirring shaft rotatably installed inside the device cylinder body and a stirrer variable-frequency motor arranged at the top of the device cylinder body, and the four-oblique-blade hoop is installed on the stirring shaft.

[0009] Preferably, one end of the stripping inlet pipe extends to the outside of the device cylinder body and is installed with a stripping inlet connection flange, and a flow meter is also arranged on the stripping inlet pipe.

[0010] Preferably, a three-inclined cylinder sprinkler is further provided inside the equipment cylinder body, and the three-inclined cylinder sprinkler is located above the four-inclined blade agitator;

[0011] The three-inclined cylinder sprinkler includes a three-inclined cylinder hoop sleeved on the stirring shaft. A fastening bolt for fastening it to the stirring shaft is screwed on the three-inclined cylinder hoop, and three connecting rods are installed on the outer circumference of the three-inclined cylinder hoop. One end of each of the three connecting rods away from the three-inclined cylinder hoop is connected with an inclined cylinder.

[0012] More preferably, three sight glasses are further provided on the outer wall of the equipment cylinder body and are equally spaced along its height direction. Through the sight glasses, the operation condition inside the tank and the volatilization effect can be observed and monitored at any time.

[0013] Even more preferably, an external coil pipe of the equipment cylinder body is further provided outside the equipment cylinder body.

[0014] Most preferably, stirring baffles and a remote liquid level gauge are further installed on the inner wall of the equipment cylinder body.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] When the present invention is in use, a stripping mechanism is arranged at the bottommost part inside the equipment cylinder body to adopt a stripping method to break the gas-liquid equilibrium, promote the transfer of volatile components from the liquid phase to the gas phase, and during the transfer process of the volatile components, the four-inclined blade agitator is used to stir the material. And the four-inclined blade agitator has a relatively large shearing force, which can better volatilize the volatile components from the liquid phase. Then, the liquid phase volatilization area is increased by the three-inclined cylinder sprinkler, which is more conducive to the full volatilization of the volatile components, thereby ensuring the volatilization efficiency and volatilization amount, and improving the purity and quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the stripping mechanism of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the three-inclined cylinder sprinkler of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the four-inclined blade agitator of the present invention.

[0022] In the figure: 1. Equipment cylinder body; 2. Stripping mechanism; 3. Four-oblique-blade stirrer; 4. Three-oblique-cylinder sprinkler; 5. Sight glass; 6. Variable-frequency motor of stirrer; 7. Vacuum extraction pipe orifice; 8. External coil pipe of equipment cylinder body; 9. Stripping holes; 10. Support rod for internal and external stripping pipes; 11. Stripping air inlet connection flange; 12. Stirring shaft; 13. Oblique cylinder; 14. Fastening bolt; 15. Hoop for three-oblique cylinders; 16. Oblique-blade paddle; 17. Hoop for four-oblique blades; 18. Stirring baffle. Specific implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0024] The present invention provides a devolatilization device as Figures 1 - 4 shown, which includes an equipment cylinder body 1 with a feed port at the top, and a vacuum extraction pipe orifice 7 is arranged at the top of the equipment cylinder body 1; three sight glasses 5 are evenly distributed along the height direction on the outer wall of the equipment cylinder body 1, and the internal operation condition and volatilization effect of the equipment cylinder body 1 can be observed and monitored at any time through the sight glasses 5; an external coil pipe 8 of the equipment cylinder body is also arranged outside the equipment cylinder body 1;

[0025] It further includes a stripping mechanism 2 and a four-oblique-blade stirrer 3 arranged inside the equipment cylinder body 1, wherein:

[0026] The stripping mechanism 2 includes a concentrically arranged internal stripping pipe and an external stripping pipe, and a support rod 10 for internal and external stripping pipes connecting the internal stripping pipe and the external stripping pipe. One side of the internal stripping pipe and the external stripping pipe is commonly connected with a stripping air inlet pipe, and stripping holes 9 are evenly distributed on both the internal stripping pipe and the external stripping pipe; one end of the stripping air inlet pipe extends to the outside of the equipment cylinder body 1 and is provided with a stripping air inlet connection flange 11, and a flow meter is also arranged on the stripping air inlet pipe; the support rod 10 for internal and external stripping pipes is welded inside the equipment cylinder body 1 to realize stable support for the internal stripping pipe and the external stripping pipe;

[0027] The four-oblique-blade stirrer 3 is arranged above the stripping mechanism 2, and the four-oblique-blade stirrer 3 includes a hoop 17 for four-oblique blades and four oblique-blade paddles 16 installed on the outer circumference of the hoop 17 for four-oblique blades. A power member for driving the four oblique-blade paddles 16 to rotate is also arranged on the equipment cylinder body 1.

[0028] Specifically, the power component includes a stirring shaft 12 rotatably installed inside the equipment cylinder body 1 and a variable-frequency motor 6 for the stirrer arranged at the top of the equipment cylinder body 1. The four-inclined-blade hoop 17 is installed on the stirring shaft 12. The power component also includes a speed reducer and a frequency converter (not shown in the attached drawings) to adjust the rotation speed of the variable-frequency motor 6 for the stirrer to drive the stirring shaft 12 to rotate, achieving the effect of controlling the evaporation amount.

[0029] Through the above, during use, the material can be added into the equipment cylinder body 1 through the feed port, and then the stripping inlet pipe is connected to an external gas supply device through the stripping inlet connection flange 11, and the gas consumption is detected by a flow meter. Subsequently, the variable-frequency motor 6 for the stirrer drives the stirring shaft 12 to rotate, so that the stirring shaft 12 drives the four inclined-blade impellers 16 to rotate through the four-inclined-blade hoop 17. At this time, the four inclined-blade impellers 16 agitate the material, and at the same time, the gas is input into the inner stripping pipe and the outer stripping pipe through the stripping inlet pipe by the external gas supply device and then discharged through the stripping holes 9 to break the gas-liquid balance, thereby promoting the transfer of volatile components from the liquid phase to the gas phase. And during the transfer process of the volatile components, the shear force of the four inclined-blade impellers 16 is relatively large, which can better volatilize the volatile components from the liquid phase, thus realizing the full volatilization of the volatile components, ensuring the evaporation efficiency and evaporation amount, and improving the purity and quality of the product.

[0030] Among them, the inclined-blade impeller 16 is axial-flow type, and the inclination angle of its blade is controlled within the range of 35 - 45°. If the angle is too large, the circulation amount will increase and the effective shear area will decrease; if the angle is too small, the radial flow will increase and the shear zone will be concentrated at the blade edge, reducing the shear range. And if the diameter and width of the inclined-blade impeller 16 are relatively small, a high-speed rotation area will be generated, and the shear force will be concentrated near the blade, which is suitable for quickly dispersing and breaking bubbles to achieve the shear effect.

[0031] At the same time, in this embodiment, as Figure 1 and Figure 3 shown, a three-inclined-cylinder sprinkler 4 is also arranged inside the equipment cylinder body 1, and the three-inclined-cylinder sprinkler 4 is located above the four-inclined-blade stirrer 3;

[0032] The three-inclined-cylinder sprinkler 4 includes a three-inclined-cylinder hoop 15 sleeved on the stirring shaft 12. A fastening bolt 14 for fastening it to the stirring shaft 12 is screwed on the three-inclined-cylinder hoop 15, and three connecting rods are installed on the outer circumference of the three-inclined-cylinder hoop 15. One end of each of the three connecting rods away from the three-inclined-cylinder hoop 15 is connected to an inclined cylinder 13.

[0033] While the power component drives the four-inclined-blade stirrer 3 to rotate, the stirring shaft 12 drives the three inclined cylinders 13 to rotate synchronously through the three-inclined-cylinder hoop 15 and the connecting rods. At this time, the three inclined cylinders 13 sprinkle the liquid phase, thereby increasing the evaporation area of the liquid phase, being more conducive to the full volatilization of the volatile components, further ensuring the evaporation efficiency and evaporation amount, and improving the purity and quality of the product;

[0034] Among them, the inclined cylinder 13 is set with a sloping opening at the bottom and a flat opening at the top to ensure the spraying pressure and liquid surface area. The angle between the inclined cylinder 13 and the stirring shaft 12 is controlled within 70° to 85°; the angle between the inclined cylinder 13 and the liquid surface of the material is controlled within 60° to 80°, to avoid being horizontal with the liquid surface of the material at too small an angle and being unable to splash out a large liquid film area. When the inclined cylinder 13 splashes the liquid phase, the material enters from the bottom of the inclined cylinder 13 and is ejected from the top of the inclined cylinder 13 by the stirring rotational force, so that each inclined cylinder 13 can splash out a large-area liquid film (the liquid film is in the gas phase space inside the container and on the inner wall of the container). In this way, through the three inclined cylinders 13, the evaporation area of the large-area liquid film of the entire circle can be ensured, thus achieving the effect of increasing the evaporation area.

[0035] In addition, in an embodiment, as Figure 1 shown, a stirring baffle 18 and a remote liquid level gauge are also installed on the inner wall of the equipment cylinder body 1. The remote liquid level gauge (not shown in the drawings) is used to detect the liquid level inside the equipment cylinder body 1.

[0036] During the rotation of the four-blade stirrer 3 and the three-inclined-cylinder sprinkler 4 driven by the power component, the liquid inside the equipment cylinder body 1 forms a circulating flow. When the circulating liquid collides with the stirring baffle 18, the stirring baffle 18 plays a role in disturbing the flow, turning the circulating flow into a radial flow, thereby further improving the stirring effect on the liquid phase, promoting the better volatilization of the volatile components from the liquid phase, and thus greatly improving the volatilization efficiency.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A devolatilization device, characterized in that: It comprises an equipment cylinder (1) with a feed port at the top, and a vacuum pipe port (7) is provided at the top of the equipment cylinder (1); It also includes a stripping mechanism (2) and a four-pitch blade agitator (3) arranged inside the equipment barrel (1), wherein: The stripping mechanism (2) comprises an inner stripping pipe and an outer stripping pipe which are arranged concentrically, and an inner and outer stripping pipe support rod (10) connecting the inner stripping pipe and the outer stripping pipe, one side of the inner stripping pipe and the outer stripping pipe are connected to a stripping air inlet pipe, and the inner stripping pipe and the outer stripping pipe are both provided with uniformly distributed stripping holes (9); The four-slant-blade agitator (3) is arranged above the steam stripping mechanism (2), and the four-slant-blade agitator (3) comprises a four-slant-blade clamp (17) and four inclined-blade paddles (16) installed on the outer circumference of the four-slant-blade clamp (17). The equipment barrel (1) is also provided with a power part for driving the four inclined-blade paddles (16) to rotate.

2. The devolatilization equipment according to claim 1, characterized in that: The power component comprises a stirring shaft (12) rotatably mounted inside the equipment barrel (1), and a stirring variable frequency motor (6) arranged on the top of the equipment barrel (1), and the four-slant blade clamp (17) is mounted on the stirring shaft (12).

3. The devolatilization equipment according to claim 1, characterized in that: One end of the stripping air inlet pipe extends to the outside of the equipment barrel (1) and is provided with a stripping air inlet connecting flange (11), and a flow meter is also provided on the stripping air inlet pipe.

4. The devolatilization equipment according to claim 2, characterized in that: A three-slant cylinder sprinkler (4) is also arranged inside the equipment cylinder (1), and the three-slant cylinder sprinkler (4) is located above the four-slant blade stirrer (3); The three-slant-tube sprinkler (4) comprises a three-slant-tube clamp (15) sleeved on a stirring shaft (12), a fastening bolt (14) being screwed on the three-slant-tube clamp (15) for fastening the three-slant-tube clamp (15) to the stirring shaft (12), and three connecting rods are installed on the outer circumference of the three-slant-tube clamp (15), and the ends of the three connecting rods away from the three-slant-tube clamp (15) are all connected to the inclined tube (13).

5. The devolatilization equipment according to claim 1, characterized in that: The outer wall of the equipment barrel (1) is also provided with three sight glasses (5) which are distributed at equal intervals along its height direction.

6. The devolatilization equipment according to claim 1, characterized in that: An equipment cylinder external coil (8) is also provided outside the equipment cylinder (1).

7. The devolatilization equipment according to claim 1, characterized in that: A stirring baffle (18) and a remote liquid level meter are also installed on the inner wall of the equipment barrel (1).

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