Evaporation and impurity removal equipment for acetic acid in diketene production

Abstract

The invention relates to the technical field of impurity removal equipment, in particular to acetic acid evaporation impurity removal equipment in ketene dimer production, which comprises an impurity removal bin, a cover plate, a first flange, a second flange, an adjusting device, a connecting device and a supporting structure, four placing grooves are formed in the annular outer wall surface of the impurity removal bin at the same rotation angle, and the four placing grooves are arranged in the extending direction of the impurity removal bin. The four vent grooves correspond to and communicate with the four containing grooves respectively, the four cover plates are detachably installed on the annular outer wall of the impurity removal bin through bolts, the first flange is fixedly installed at the first end of the impurity removal bin, and the second flange is fixedly installed at the second end of the impurity removal bin. Gas passes through the two sections of gas grooves in a reciprocating manner within a fixed distance, so that the time and contact area of the gas passing through the filter element are increased, and the filtering effect is improved; different substances can be filtered by dismounting and mounting different filter elements and adjusting a gas flowing channel, so that the applicability and functionality of the equipment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of impurity removal equipment, in particular to acetic acid evaporation and impurity removal equipment in diketene production. Background Art

[0002] Diketene, also known as acetyl ketene, is an important fine chemical intermediate. Due to its two double bonds in its molecular structure, it is chemically very active and its application areas are constantly expanding. In the existing process of producing diketene using acetic acid cracking, the acetic acid is first vaporized and then passed into a cracking furnace for reaction. However, due to issues with yield and conversion, uncracked acetic acid inevitably remains during the production process. This uncracked acetic acid is then concentrated and reused as feed.

[0003] However, during repeated use, acetic acid accumulates solid and soluble impurities, which enter the cracking furnace tubes during evaporation, causing tube scaling and equipment damage. Furthermore, acetic acid vapor flowing out of the gasification equipment inevitably carries a certain amount of liquid phase, adversely affecting the cracking reaction. Therefore, removing solid and soluble impurities and liquid phase from the acetic acid vapor before it enters the cracking furnace is key to improving diketene production efficiency. Summary of the Invention

[0004] The object of the present invention is to provide an acetic acid evaporation and impurity removal device in diketene production to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an acetic acid evaporation and impurity removal device for diketene production, comprising: an impurity removal bin, a cover plate, a first flange, a second flange, an adjusting device, a connecting device, and a supporting structure, wherein four placement slots are provided on the annular outer wall surface of the impurity removal bin at the same rotation angle, and four ventilation slots are provided on the impurity removal bin along the direction in which the impurity removal bin extends, and the four ventilation slots correspond to and are connected to the four placement slots respectively. There are four cover plates, which are detachably mounted on the annular outer wall of the impurity removal bin by bolts and correspond to the four placement slots. The first flange is fixedly mounted on the first end of the impurity removal bin, and the second flange is fixedly mounted on the second end of the impurity removal bin. A third flange is mounted on the operating end of the adjusting device, and the third flange is connected to the first flange. A fourth flange is mounted on one end of the connecting device, and the fourth flange is connected to the second flange. The two ends of the top of the supporting structure are respectively mounted on the outside of the adjusting device and the outside of the connecting device.

[0006] Preferably, the adjusting device includes: a shell, a bottom plate, a top cover, a first adjusting disk, a second adjusting disk, a first motor, a second motor, a first shaft roller, and a second shaft roller. The outer wall of the shell is fixedly connected to the third flange. The bottom plate is installed in the inner cavity of the shell and is located in the same plane as the third flange. Four first air holes are opened on the bottom plate at a rotation angle of 90°. The top cover is detachably installed at the end of the shell away from the third flange. The first adjusting disk is rotatably installed in the inner cavity of the shell. Second and third air holes are opened on the first adjusting disk. The second air hole is a circular structure. The second air hole is the same size as the first air hole and is located on the same rotation radius. The third air hole is an elliptical structure. The second air hole and the third air hole are distributed at a rotation angle of 90°. At the same time, one end of the third air hole is located at the center of the first adjusting disk, the second adjusting disk is rotatably installed in the inner cavity of the shell, and a fourth air hole is opened on the second adjusting disk. The fourth air hole has the same structure as the third air hole, and one end of the fourth air hole is also located at the center of the second adjusting disk. The fourth air hole is connected to the third air hole. The first motor is installed on the top cover, and the second motor is installed on the top cover and is adjacent to the first motor. The first shaft roller is arranged in the inner cavity of the shell and connected to the output end of the first motor. The outer wall of the first shaft roller is engaged with the annular outer wall of the first adjusting disk. The second shaft roller is arranged in the inner cavity of the shell and is connected to the output end of the second motor. The outer wall of the second shaft roller is engaged with the annular outer wall of the second adjusting disk.

[0007] Preferably, in the inner cavity of the shell, the bottom plate, the first adjustment disk, the second adjustment disk and the top cover are distributed in order.

[0008] Preferably, sliding sealing rings are provided between the bottom plate, the first adjusting disk, the second adjusting disk and the top cover.

[0009] Preferably, the connecting device includes: a connecting rod, an electronic valve, and a connecting pipe. One end of the connecting rod is fixedly connected to the fourth flange. Four connecting holes are provided along the extension direction of the connecting rod. The four connecting holes correspond to the positions of the four ventilation grooves. The number of the electronic valves is four, and the four electronic valves are respectively installed in the four connecting holes. The number of the connecting pipes is four, and the four connecting pipes are respectively installed on the four connecting holes.

[0010] Preferably, the support structure includes: a support ring, a support plate, and support legs. There are two support rings, and the two support rings are respectively located on the outside of the adjustment device and the connecting device. The support ring is a two-section structure, forming an annular structure and is fixed by bolts. The support plate is installed at the bottom ends of the two support rings. There are two support legs, and the two support legs are installed in an eight-shaped structure on both sides of the bottom surface of the support plate.

[0011] The acetic acid evaporation and impurity removal equipment for diketene production proposed by the present invention has the following beneficial effects: This patent focuses on acetic acid evaporation and impurity removal equipment in diketene production, and presents advantages in terms of filtering effect, applicability and functionality, ease of operation and equipment stability, providing strong support for diketene production.

[0012] 1. The present invention features a unique gas slot structure that allows gas to reciprocate through two gas slots within a fixed distance. This significantly increases the time the gas spends passing through the filter element and substantially expands the contact area. During actual filtration of acetic acid vapor, this design ensures full contact between the vapor and the filter element, more effectively capturing solid impurities, soluble impurities, and the liquid phase. This significantly improves the accuracy and thoroughness of the filtration, ensures higher purity of the acetic acid vapor entering the cracking furnace, reduces damage to the furnace tubes, and improves the efficiency of the cracking reaction.

[0013] 2. By removing and installing different types of filter elements and using an adjustment device to flexibly change the gas flow path, the equipment has strong adaptability. For impurities with different characteristics, such as particle size and solubility, simply replace the appropriate filter element and adjust the gas flow path to achieve targeted filtration. The same filter element can be used for two-stage filtration at the same filtration distance, saving equipment space; different filter elements can also be used to filter multiple impurities simultaneously, meeting diverse production needs and significantly improving the equipment's applicability and functionality.

[0014] 3. The design of the adjustment device is very ingenious. The first motor and the second motor control the rotation of the first roller and the second roller respectively, thereby accurately adjusting the position of the first adjustment disk and the second adjustment disk. In actual operation, the staff can easily perform these operations through the external controller. According to different filtration tasks, they can quickly select the appropriate inlet and outlet pipes, and adjust the adjustment disk to make the corresponding air holes correspond to the ventilation grooves, realizing rapid switching and optimization of the gas path. The operation is simple and convenient, effectively improving production efficiency.

[0015] 4. The supporting structure adopts two two-section support rings, which are fixed by bolts to form a ring, providing stable support for the adjustment device and the connecting device. The support plate and the support feet in an eight-shaped structure further enhance the stability of the equipment. Even if vibration occurs during the operation of the equipment, it can ensure the overall stability of the equipment, reduce component wear and loose connections caused by shaking, extend the service life of the equipment, and ensure the continuity and stability of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the impurity removal bin of the present invention; Figure 3 Schematic diagram of the connecting device of the present invention; Figure 4 Schematic diagram of the regulating device of the present invention; Figure 5 Schematic diagram of the first adjustment disk and the second adjustment disk of the present invention; Figure 6 Schematic diagram of the supporting structure of the present invention.

[0017] In the figure: 1. De-cluttering bin, 2. Placement slot, 3. Ventilation slot, 4. Cover plate, 5. First flange, 6. Second flange, 7. Adjustment device, 701. Shell, 702. Third flange, 703. Bottom plate, 704. First air hole, 705. Top cover, 706. First adjustment disk, 707. Second air hole, 708. Third air hole, 709. Second adjustment disk, 710. Fourth air hole, 711. First motor, 712. Second motor, 713. First shaft roller, 714. Second shaft roller, 8. Connecting device, 801. Connecting rod, 802. Connecting hole, 803. Electronic valve, 804. Connecting pipe, 9. Support structure, 901. Support ring, 903. Support plate, 904. Support foot. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figures 1-6 The present invention provides a technical solution for acetic acid evaporation and impurity removal equipment in diketene production. The detailed connection means are well known in the art. The following mainly introduces the working principle and process. The specific work is as follows.

[0020] An acetic acid evaporation and impurity removal device for diketene production comprises: an impurity removal bin 1, a placement slot 2, a ventilation slot 3, a cover plate 4, a first flange 5, a second flange 6, an adjustment device 7, a connecting device 8, and a support structure 9. Four placement slots 2 are opened on the annular outer wall surface of the impurity removal bin 1 at the same rotation angle.

[0021] In this embodiment, existing filter elements can be selected in the four placement slots 2 as needed to filter different impurities in the gas.

[0022] Along the extension direction of the debris removal bin 1, the debris removal bin 1 is provided with four ventilation grooves 3, and the four ventilation grooves 3 correspond to and are connected with the four placement grooves 2 respectively. There are four cover plates 4, and the four cover plates 4 are detachably mounted on the annular outer wall of the debris removal bin 1 by bolts, and correspond to the four placement grooves 2. The first flange 5 is fixedly mounted on the first end of the debris removal bin 1, and the second flange 6 is fixedly mounted on the second end of the debris removal bin 1. The working end of the adjusting device 7 is installed with a third flange 702, and the third flange 702 is connected to the first flange 5. A fourth flange is installed at one end of the connecting device 8, and the fourth flange is connected to the second flange 6. The two ends of the top of the supporting structure 9 are respectively mounted on the outside of the adjusting device 7 and the outside of the connecting device 8.

[0023] More specifically, the adjusting device 7 includes: a shell 701, a bottom plate 703, a top cover 705, a first adjusting disk 706, a second adjusting disk 709, a first motor 711, a second motor 712, a first shaft roller 713, and a second shaft roller 714. The outer wall of the shell 701 is fixedly connected to the third flange 702. The bottom plate 703 is installed in the inner cavity of the shell 701 and is located in the same plane as the third flange 702. Four first air holes 704 are opened on the bottom plate 703 at a rotation angle of 90°. The top cover 705 is detachably installed at one end of the shell 701 away from the third flange 702. The first adjusting disk 706 is rotatably installed in the inner cavity of the shell 701. The first adjusting disk 706 is provided with a second air hole 707 and a third air hole 708. The second air hole 707 is a circular structure. The second air hole 707 has the same size as the first air hole 704 and is located on the same rotation radius. The third air hole 708 is an elliptical structure. The second air hole 707 and the third air hole 708 are distributed at a rotation angle of 90°. At the same time, one end of the third air hole 708 is located at the center of the first adjusting disk 706. The second adjusting disk 709 is rotatably installed in the inner cavity of the shell 701. A fourth air hole 710 is provided on the second adjusting disk 709. The fourth air hole 710 has the same structure as the third air hole 708, and one end of the fourth air hole 710 is located at the center of the second adjusting disk 709. The fourth air hole 710 is connected to the third air hole 708. The position where the fourth air hole 710 is connected to the third air hole 708 is the center of the first adjusting disk 706 and the second adjusting disk 709.

[0024] In this embodiment, the inner cavity of the housing 701 is distributed in the order of the bottom plate 703 , the first adjustment disk 706 , the second adjustment disk 709 and the top cover 705 .

[0025] In this embodiment, sliding sealing rings are provided between the bottom plate 703, the first adjustment disk 706, the second adjustment disk 709 and the top cover 705 to ensure the sealing between the parts during the adjustment process and to ensure that the gas flows along the adjusted channel.

[0026] In this embodiment, the thickness of the first regulating disk 706 and the second regulating disk 709 ensures that the flow rate of the gas meets the flow rate of the gas in the ventilation groove 3.

[0027] The first motor 711 is installed on the top cover 705, the second motor 712 is installed on the top cover 705 and is adjacent to the first motor 711, the first roller 713 is arranged in the inner cavity of the shell 701 and is connected to the output end of the first motor 711, the outer wall of the first roller 713 is engaged with the annular outer wall of the first adjustment disk 706, the second roller 714 is arranged in the inner cavity of the shell 701 and is connected to the output end of the second motor 712, and the outer wall of the second roller 714 is engaged with the annular outer wall of the second adjustment disk 709.

[0028] In this embodiment, the first motor 711 and the second motor 712 are both servo motors, and the engagement between the shaft roller and the adjustment disk can use friction engagement or gear engagement, which can be selected according to actual needs; the outer walls of the first adjustment disk 706, the second adjustment disk 709, the first shaft roller 713 and the second shaft roller 714 can be provided with meshing teeth according to the meshing requirements.

[0029] Drive the first motor 711 and the second motor 712 to adjust the rotation angles of the first adjustment disk 706 and the second adjustment disk 709 respectively: when a straight-through channel is required, align the second air hole 707 with the first air hole 704 on the bottom plate, and the gas directly enters the impurity removal bin 1 through the third flange 702, the first air hole 704, and the second air hole 707; when steering filtration is required, the connecting structure between the third air hole 708 and the fourth air hole 710 at the center of the circle guides the gas to change its flow direction, enter the corresponding ventilation groove 3 through the eccentric elliptical channel, and cooperate with the filter element of the impurity removal bin 1 to achieve directional filtration.

[0030] More specifically, the connecting device 8 includes: a connecting rod 801, an electronic valve 803, and a connecting pipe 804. One end of the connecting rod 801 is fixedly connected to the fourth flange. Four connecting holes 802 are opened along the extension direction of the connecting rod 801. The four connecting holes 802 correspond to the positions of the four ventilation grooves 3. There are four electronic valves 803, and the four electronic valves 803 are respectively installed in the four connecting holes 802. There are four connecting pipes 804, and the four connecting pipes 804 are respectively installed on the four connecting holes 802.

[0031] More specifically, the support structure 9 includes: a support ring 901 , a support plate 903 , and support legs 904 . There are two support rings 901 , and the two support rings 901 are located outside the adjustment device 7 and the connection device 8 , respectively.

[0032] In this embodiment, the support ring 901 is a two-section structure forming an annular structure and is fixed by bolts.

[0033] The support plate 903 is mounted on the bottom ends of the two support rings 901 . There are two support legs 904 , which are mounted on both sides of the bottom surface of the support plate 903 in an "eight" structure.

[0034] Embodiment: First, the four cover plates 4 can be removed, and different filter elements can be selected according to the filtered material and placed in the four placement slots 2, and the cover plates 4 can be fixed to the impurity removal bin 1 with bolts. The first motor 711, the second motor 712 and the four electronic valves 803 are respectively connected to the external controller, and the first motor 711 and the second motor 712 are controlled by the controller to rotate. Two connecting pipes 804 can be selected as the air inlet pipe and the air outlet pipe according to the material filtered by the filter element to connect with the external equipment. The first motor 711 controls the rotation of the first shaft roller 713, which controls the rotation of the first regulating valve. The regulating disk 706 rotates so that the end of the third air hole 708 away from the center of the first regulating disk 706 corresponds to one of the ventilation slots 3 connected to the external device. Then, the second motor 712 is controlled to control the second shaft roller 714 to rotate, which controls the second regulating disk 709 to rotate so that the end of the fourth air hole 710 away from the center of the second regulating disk 709 corresponds to the other ventilation slot 3 connected to the external device. At this time, the two connecting pipes 804 connected to the external device form a closed loop through the regulating device. When the acetic acid vapor passes through this loop, the vapor can be filtered according to the filtering conditions of the filter element. If different substances need to be filtered, the outlet pipe and the inlet pipe are connected and adjusted according to the different filter elements, and the first adjustment disk 706 is controlled so that the third air hole 708 corresponds to one of the connecting pipes 804, and the second adjustment disk 709 is adjusted so that the fourth air hole 710 corresponds to the other connecting pipe 804, so that the corresponding two ventilation grooves 3 are closed and connected; During filtration, two identical filter elements can be installed in two ventilation slots 3, thereby achieving two-stage filtration at the same filtration distance, saving the volume of the equipment, or using different filter elements to filter different impurities in the gas.

[0035] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An acetic acid evaporation and impurity removal device in diketene production, characterized in that: include: A debris removal bin (1), wherein four placement grooves (2) are provided on the annular outer wall surface of the debris removal bin (1) at the same rotation angle, and four ventilation grooves (3) are provided on the debris removal bin (1) in the direction in which the debris removal bin (1) extends, and the four ventilation grooves (3) correspond to and are in communication with the four placement grooves (2) respectively; Cover plates (4), the number of the cover plates (4) is four, and the four cover plates (4) are detachably mounted on the annular outer wall of the debris removal bin (1) by means of bolts, and correspond to the four placement slots (2); A first flange (5) is fixedly mounted on a first end of the impurity removal bin (1); A second flange (6) is fixedly mounted on the second end of the impurity removal bin (1); The regulating device (7) is provided with a third flange (702) at the operating end, and the third flange (702) is connected to the first flange (5); A connecting device (8) having a fourth flange mounted on one end, the fourth flange being connected to the second flange (6); A supporting structure (9), wherein two ends of the top of the supporting structure (9) are respectively mounted on the outside of the adjusting device (7) and the outside of the connecting device (8).

2. The acetic acid evaporation and impurity removal equipment in diketene production according to claim 1, characterized in that: The regulating device (7) comprises: A housing (701), wherein an outer wall of the housing (701) is fixedly connected to a third flange (702); A bottom plate (703) is installed in the inner cavity of the housing (701) and is located in the same plane as the third flange (702). Four first air holes (704) are opened on the bottom plate (703) at a rotation angle of 90 degrees; a top cover (705) detachably mounted on an end of the housing (701) away from the third flange (702); A first adjusting disk (706) is rotatably mounted in the inner cavity of the housing (701); A second adjustment disk (709) is rotatably mounted in the inner cavity of the housing (701); A first motor (711) is mounted on the top cover (705); a second motor (712) mounted on the top cover (705) and adjacent to the first motor (711); A first shaft roller (713) is disposed in the inner cavity of the housing (701) and is connected to the output end of the first motor (711), and an outer wall of the first shaft roller (713) is engaged with an annular outer wall of the first adjustment disk (706); The second roller (714) is arranged in the inner cavity of the housing (701) and is connected to the output end of the second motor (712). The outer wall of the second roller (714) is engaged with the annular outer wall of the second adjustment disk (709).

3. The acetic acid evaporation and impurity removal equipment in diketene production according to claim 2, characterized in that: The first adjustment disk (706) is provided with a second air hole (707) and a third air hole (708), wherein the second air hole (707) is a circular structure, and the second air hole (707) and the first air hole (704) have the same size and are located on the same rotation radius, and the third air hole (708) is an elliptical structure, and the second air hole (707) and the third air hole (708) are distributed at a rotation angle of 90°, and one end of the third air hole (708) is located at the center of the first adjustment disk (706).

4. The acetic acid evaporation and impurity removal equipment in diketene production according to claim 3, characterized in that: A fourth air hole (710) is provided on the second regulating disk (709). The fourth air hole (710) has the same structure as the third air hole (708), and one end of the fourth air hole (710) is located at the center of the second regulating disk (709). The fourth air hole (710) is connected to the third air hole (708).

5. The acetic acid evaporation and impurity removal equipment in diketene production according to claim 4, characterized in that: In the inner cavity of the housing (701), the bottom plate (703), the first adjustment disk (706), the second adjustment disk (709) and the top cover (705) are distributed in order.

6. The acetic acid evaporation and impurity removal equipment in diketene production according to claim 5, characterized in that: Sliding sealing rings are provided between the bottom plate (703), the first adjustment disk (706), the second adjustment disk (709) and the top cover (705).

7. The acetic acid evaporation and impurity removal equipment in diketene production according to claim 6, characterized in that: The connecting device (8) comprises: A connecting rod (801) is fixedly connected to the fourth flange at one end, and four connecting holes (802) are provided along the extending direction of the connecting rod (801), and the four connecting holes (802) correspond to the positions of the four ventilation grooves (3); Electronic valves (803), the number of the electronic valves (803) is four, and the four electronic valves (803) are respectively installed in the four connecting holes (802); The connecting tubes (804) are four in number, and the four connecting tubes (804) are respectively installed on the four connecting holes (802).

8. The acetic acid evaporation and impurity removal equipment in diketene production according to claim 7, characterized in that: The support structure (9) comprises: Support rings (901), the number of the support rings (901) is two, and the two support rings (901) are respectively located on the outside of the adjustment device (7) and the connecting device (8); A support plate (903) is mounted on the bottom ends of the two support rings (901); The supporting legs (904) are two in number, and the two supporting legs (904) are installed on both sides of the bottom surface of the support plate (903) in an "eight" structure.

9. The acetic acid evaporation and impurity removal equipment in diketene production according to claim 8, characterized in that: The support ring (901) is a two-section structure, forming an annular structure and fixed by bolts.

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