Impurity filtering structure for acetic anhydride production

Abstract

The utility model relates to the technical field of acetic anhydride production, in particular to an impurity filtering structure for acetic anhydride production, which comprises a first filter screen, the top of the first filter screen is connected with a fixing ring, a second filter screen is sleeved outside the first filter screen, the top of the second filter screen is connected with a first connecting pipe, a first connecting ring is fixed on the outer wall of the top end of the first connecting pipe, and an annular accommodating cavity is arranged in the fixing ring. The first connecting ring is rotationally connected with the fixing ring through a bearing, the outer ring face of the first connecting ring extends into the containing cavity and is connected with a circle of rack, the rack is meshed with a gear, and the gear is connected with a motor. The relative position and distance of the first filter screen and the second filter screen can be adjusted according to needs, so that the size of the filter holes is adjusted, different filter effects are achieved, online adjustment can be achieved, the filter screens do not need to be replaced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of acetic anhydride production technology, specifically relating to an impurity filtration structure for acetic anhydride production. Background Technology

[0002] Currently, in acetic anhydride production, filters are commonly used for impurity filtration. These devices are primarily used to separate impurities, particles, and suspended solids from the synthesized acetic anhydride stock solution, thereby improving the purity and quality of the acetic anhydride. Filters are typically used in conjunction with pumps, pipes, and connectors to ensure that the liquid flows smoothly through the filter and is filtered out of impurities. However, in existing technologies, the pore size of the filter screen is not adjustable. When filtering impurities of different sizes, the filter screen needs to be replaced, affecting production efficiency. Therefore, an impurity filtration structure for acetic anhydride production is needed to solve the aforementioned technical problems. Utility Model Content

[0003] To address the aforementioned deficiencies in existing technologies, this utility model provides an impurity filtration structure for acetic anhydride production, comprising a first filter screen, a fixing ring connected to the top of the first filter screen with mounting holes, a second filter screen sleeved on the first filter screen, a connecting pipe connected to the top of the second filter screen, a connecting ring fixed to the outer wall of the top end of the connecting pipe, an annular receiving cavity within the fixing ring, and the first connecting ring rotatably connected to the fixing ring via a bearing. The outer annular surface of the first connecting ring extends into the receiving cavity and is connected to a rack, which meshes with a gear. The gear is connected to a motor, and the motor is connected to a detachable battery. During filtration, the first filter screen and the second filter screen come into contact. The overlapping use of the first and second filter screens improves the filtration effect. The rotation of the motor drives the second filter screen to rotate. Adjusting the relative positions of the first and second filter screens changes the size of the filter mesh formed by the two screens, achieving different filtration effects.

[0004] Preferably, a connecting pipe is connected to the top of filter screen one, and a connecting ring two is fixed to the outer wall of the top of the connecting pipe two. The connecting ring two is connected to a fixed ring via a vertical telescopic rod. The fixed end of the vertical telescopic rod is fixedly connected to the fixed ring, and the telescopic end of the vertical telescopic rod is fixedly connected to the lower surface of the connecting ring two. The vertical telescopic rod is an electric push rod or a hydraulic rod. By extending and retracting the vertical telescopic rod, the distance between filter screen one and filter screen two can be adjusted, which not only further adjusts the filtration effect but also facilitates rinsing of filter screen one and filter screen two, reducing impurity residue.

[0005] Preferably, the fixing ring corresponding to the vertical telescopic rod has a groove, and the fixed end of the vertical telescopic rod is located in the groove. After the vertical telescopic rod is retracted, the upper surface of the connecting ring two is flush with the upper surface of the fixing ring. This feature improves the flatness of the fixing ring and facilitates installation during use.

[0006] Preferably, both filter screen one and filter screen two have a U-shaped cross-section. By increasing the filtration area, the filtration efficiency is improved.

[0007] Preferably, both filter screen one and filter screen two have isosceles trapezoidal cross-sections that are wider at the top and narrower at the bottom. This design allows for an effective gap to appear between filter screen one and filter screen two when the vertical telescopic rod moves filter screen one upward, thus improving the cleaning effect.

[0008] Working principle: During filtration, filter screen one and filter screen two come into contact. The overlapping use of filter screen one and filter screen two can improve the filtration effect. The rotation of the motor can drive filter screen two to rotate. Adjusting the relative position of filter screen one and filter screen two can change the size of the filter screen holes formed by filter screen one and filter screen two, so as to achieve different filtration effects. At the same time, the distance between filter screen one and filter screen two can be adjusted by extending and retracting the vertical telescopic rod. This not only further adjusts the filtration effect, but also facilitates rinsing of filter screen one and filter screen two, reducing the residue of impurities.

[0009] This invention also includes other components that enable the impurity filtration structure for acetic anhydride production to function properly, such as the control components for the ignition machine, which are all conventional techniques in the art. Furthermore, any devices or components not specified in this invention employ conventional techniques and equipment in the art.

[0010] The beneficial effects of this utility model are: the relative position and distance between filter screen one and filter screen two can be adjusted as needed, thereby adjusting the size of the filter holes and achieving different filtration effects. It can be adjusted online without replacing the filter screen, which is conducive to improving production efficiency. At the same time, after filter screen one and filter screen two are separated, it is convenient to wash filter screen one and filter screen two. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of an impurity filtration structure for acetic anhydride production according to Embodiment 1 of this utility model;

[0013] Figure 2 This is a schematic diagram of an impurity filtration structure for acetic anhydride production in Example 2;

[0014] Figure 3 for Figure 2 Diagram showing the state of the vertical telescopic rod when it is extended;

[0015] Figure 4 This is a schematic diagram of an impurity filtration structure for acetic anhydride production in Example 3.

[0016] In the diagram: 1. Filter screen two; 2. Filter screen one; 3. Fixing ring; 4. Receiving cavity; 5. Connecting ring two; 6. Connecting ring one; 7. Rack; 8. Gear; 9. Motor; 10. Connecting pipe two; 11. Vertical telescopic rod. Detailed Implementation

[0017] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention.

[0018] Example 1

[0019] like Figure 1 As shown, this utility model provides an impurity filtration structure for acetic anhydride production, including a filter screen 2. A fixing ring 3 is connected to the top of the filter screen 2, and the fixing ring has mounting holes for installing the filter screen onto a pipe or connector. A filter screen 1 is fitted over the filter screen 2, and a connecting pipe 1 is connected to the top of the filter screen 1. A connecting ring 6 is fixed to the outer wall of the top end of the connecting pipe 1. An annular receiving cavity 4 is provided inside the fixing ring 3. The connecting ring 6 is rotatably connected to the fixing ring 3 via a bearing. The outer annular surface of the connecting ring 6 extends into the receiving cavity 4 and is connected to a rack 7. The rack 7 meshes with a gear 8, and the gear 8 is connected to a motor 9. The motor 9 is connected to a detachable battery. During filtration, the filter screen 2 and the filter screen 1 come into contact. The superposition of the filter screen 2 and the filter screen 1 creates smaller filter holes, resulting in a significant superposition effect.

[0020] It can improve the filtration effect. The rotation of motor 9 can drive filter screen 1 to rotate. By adjusting the relative position of filter screen 2 and filter screen 1, the size of the filter mesh formed by filter screen 2 and filter screen 1 can be changed to achieve different filtration effects.

[0021] Both filter screen 1 and filter screen 2 have cross-sections that are wider at the top and narrower at the bottom, forming an isosceles trapezoid.

[0022] During filtration, filter screen 2 and filter screen 1 come into contact. The superposition of filter screen 2 and filter screen 1 can improve the filtration effect. The rotation of motor 9 can drive filter screen 1 to rotate. Adjusting the relative position of filter screen 2 and filter screen 1 can change the size of the filter mesh formed by filter screen 2 and filter screen 1, thus achieving different filtration effects.

[0023] Example 2

[0024] like Figure 2-3As shown, this utility model provides an impurity filtration structure for acetic anhydride production, including a filter screen 2. A fixing ring 3 is connected to the top of the filter screen 2, and the fixing ring has a mounting hole. The filter screen is installed on a pipe or joint through the mounting hole. A filter screen 1 is fitted over the filter screen 2. A connecting pipe 1 is connected to the top of the filter screen 1. A connecting ring 6 is fixed to the outer wall of the top end of the connecting pipe 1. An annular receiving cavity 4 is provided inside the fixing ring 3. The connecting ring 6 is rotatably connected to the fixing ring 3 through a bearing. The outer annular surface of the connecting ring 6 extends into the receiving cavity 4 and is connected to a rack 7. The rack 7 meshes with a gear 8. The gear 8 is connected to a motor 9. The motor 9 is connected to a detachable battery. During filtration, filter screen 2 and filter screen 1 come into contact. The superposition of filter screen 2 and filter screen 1 can improve the filtration effect. The rotation of motor 9 can drive filter screen 1 to rotate. Adjusting the relative position of filter screen 2 and filter screen 1 can change the size of the filter mesh formed by filter screen 2 and filter screen 1, thus achieving different filtration effects.

[0025] The top of filter screen 2 is connected to a connecting pipe 10. A connecting ring 5 is fixed to the outer wall of the top of the connecting pipe 10. The connecting ring 5 is connected to a fixed ring 3 via a vertical telescopic rod 11. The fixed end of the vertical telescopic rod 11 is fixedly connected to the fixed ring 3, and the telescopic end of the vertical telescopic rod 11 is fixedly connected to the lower surface of the connecting ring 5. The vertical telescopic rod 11 is an electric push rod or a hydraulic rod. By extending and retracting the vertical telescopic rod 11, the distance between filter screen 2 and filter screen 1 can be adjusted. This not only further adjusts the filtration effect but also facilitates rinsing of filter screens 2 and 1, reducing impurity residue.

[0026] The vertical telescopic rod 11 has a groove on the fixing ring 3, and the fixed end of the vertical telescopic rod 11 is located in the groove. After the vertical telescopic rod 11 is retracted, the upper surface of the connecting ring 2 5 is flush with the upper surface of the fixing ring 3. This feature improves the flatness of the fixing ring 3 and facilitates installation during use.

[0027] Both filter screen 2 and filter screen 1 have an isosceles trapezoidal cross-section that is wider at the top and narrower at the bottom. This design allows for an effective gap to appear between filter screen 2 and filter screen 1 when the vertical telescopic rod 11 moves filter screen 2 upward, thus improving the cleaning effect.

[0028] During filtration, filter screen 1 and filter screen 2 can be used in contact and stacked as needed, or they can be used to filter the material twice with a certain distance between them. When filter screen 1 2 and filter screen 2 1 are in contact, the stacking of filter screen 1 2 and filter screen 2 1 can improve the filtration effect. The rotation of motor 9 can drive filter screen 2 1 to rotate. Adjusting the relative position of filter screen 1 2 and filter screen 2 1 can change the size of the filter mesh formed by filter screen 1 2 and filter screen 2 1, so as to achieve different filtration effects. At the same time, the distance between filter screen 1 2 and filter screen 2 1 can be adjusted by extending and retracting the vertical telescopic rod 11. This not only further adjusts the filtration effect, but also makes it easier to wash filter screen 1 2 and filter screen 2 1 after they are separated, reducing the residue of impurities.

[0029] Example 3

[0030] like Figure 4 As shown, this utility model provides an impurity filtration structure for acetic anhydride production, including a filter screen 2. A fixing ring 3 is connected to the top of the filter screen 2, and the fixing ring has a mounting hole. The filter screen is installed on a pipe or joint through the mounting hole. A filter screen 1 is fitted over the filter screen 2. A connecting pipe 1 is connected to the top of the filter screen 1. A connecting ring 6 is fixed to the outer wall of the top end of the connecting pipe 1. An annular receiving cavity 4 is provided inside the fixing ring 3. The connecting ring 6 is rotatably connected to the fixing ring 3 through a bearing. The outer annular surface of the connecting ring 6 extends into the receiving cavity 4 and is connected to a rack 7. The rack 7 meshes with a gear 8. The gear 8 is connected to a motor 9. The motor 9 is connected to a detachable battery. During filtration, filter screen 2 and filter screen 1 come into contact. The superposition of filter screen 2 and filter screen 1 can improve the filtration effect. The rotation of motor 9 can drive filter screen 1 to rotate. Adjusting the relative position of filter screen 2 and filter screen 1 can change the size of the filter mesh formed by filter screen 2 and filter screen 1, thus achieving different filtration effects.

[0031] Both filter screen 1 (2) and filter screen 2 (1) have a U-shaped cross-section. By increasing the filtration area, the filtration efficiency is improved.

[0032] During filtration, filter screen 2 and filter screen 1 come into contact. The superposition of filter screen 2 and filter screen 1 can improve the filtration effect. The rotation of motor 9 can drive filter screen 1 to rotate. Adjusting the relative position of filter screen 2 and filter screen 1 can change the size of the filter mesh formed by filter screen 2 and filter screen 1, thus achieving different filtration effects.

[0033] The embodiments of this utility model have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An impurity filtration structure for acetic anhydride production, comprising a filter screen, wherein a fixing ring is connected to the top of the filter screen, characterized in that: The filter screen one is covered with a filter screen two. The top of the filter screen two is connected to a connecting pipe one. The outer wall of the top end of the connecting pipe one is fixed with a connecting ring one. The fixed ring has an annular receiving cavity. The connecting ring one is rotatably connected to the fixed ring through a bearing. The outer ring surface of the connecting ring one extends into the receiving cavity and is connected to a rack. The rack meshes with a gear. The gear is connected to a motor.

2. The impurity filtration structure for acetic anhydride production according to claim 1, characterized in that: The top of the filter screen is connected to the connecting pipe, and the outer wall of the top of the connecting pipe is fixed with the connecting ring. The connecting ring is connected to the fixed ring through a vertical telescopic rod. The fixed end of the vertical telescopic rod is fixedly connected to the fixed ring, and the telescopic end of the vertical telescopic rod is fixedly connected to the lower surface of the connecting ring.

3. The impurity filtration structure for acetic anhydride production according to claim 2, characterized in that: The fixing ring corresponding to the vertical telescopic rod has a groove, and the fixing end of the vertical telescopic rod is located in the groove.

4. The impurity filtration structure for acetic anhydride production according to claim 1, characterized in that: Both filter screen one and filter screen two have U-shaped cross-sections.

5. The impurity filtration structure for acetic anhydride production according to claim 1, characterized in that: Both filter screen one and filter screen two have cross-sections that are isosceles trapezoids that are wider at the top and narrower at the bottom.

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