A device for evaporating and removing impurities in acetic acid in the production of diacetyl

Abstract

The present application relates to the technical field of impurity removal equipment, in particular to an acetic acid evaporation impurity removal equipment in diketene 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 on the annular outer wall of the impurity removal bin at the same rotation angle. Along the extension direction of the impurity removal bin, four air grooves correspond to and communicate with the four placing grooves respectively. The four cover plates are detachably installed on the annular outer wall of the impurity removal bin by 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. The gas reciprocates through the two air grooves within a fixed distance, which increases the time and contact area of the gas passing through the filter core, and improves the filtering effect. By detaching and installing different filter cores and adjusting the gas flow channel, different substances can be filtered, which improves the applicability and functionality of the equipment.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of impurity removal equipment, in particular to an acetic acid evaporation impurity removal equipment in diketene production. BACKGROUND

[0002] Diketene, also known as acetyl vinyl ketone, is an important fine chemical intermediate. Due to the fact that the molecule structure of diketene contains two double bonds, the chemical property of diketene is very active, and the application field of diketene is continuously expanded. In the diketene production process by using the acetic acid cracking method in the prior art, acetic acid is first gasified, and then the acetic acid is introduced into a cracking furnace for reaction. However, due to the problems of yield and conversion rate, there will be uncracked acetic acid in the production process. The uncracked acetic acid is used as raw material again after concentration.

[0003] However, solid impurities and soluble impurities are enriched in the repeated use of acetic acid, and the solid impurities and the soluble impurities will enter the cracking furnace tube in the evaporation process, resulting in fouling of the furnace tube and damage to the equipment. In addition, a certain amount of liquid phase will be entrained from the gasification equipment after the acetic acid vapor flows out, which will have an adverse effect on the cracking reaction. Therefore, how to remove the solid impurities, the soluble impurities and the liquid phase in the acetic acid vapor before the acetic acid vapor enters the cracking furnace becomes the key to improving the production efficiency of diketene. SUMMARY

[0004] The application aims to provide an acetic acid evaporation impurity removal equipment in diketene production to solve the problems in the background.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: an acetic acid evaporation impurity removal equipment in diketene production, comprising: an impurity removal bin, a cover plate, a first flange, a second flange, an adjusting device, a connecting device, a support structure, four placing grooves are formed on the annular outer wall of the impurity removal bin at the same rotation angle, and four air grooves are formed on the impurity removal bin in the extending direction of the impurity removal bin, the four air grooves are respectively corresponding to and communicated with the four placing grooves, the number of the cover plates is four, the four cover plates are detachably installed on the annular outer wall of the impurity removal bin through bolts and correspond to the four placing grooves, the first flange is fixedly installed at the first end of the impurity removal bin, the second flange is fixedly installed at the second end of the impurity removal bin, the operating end of the adjusting device is provided with a third flange, the third flange is connected with the first flange, one end of the connecting device is provided with a fourth flange, the fourth flange is connected with the second flange, and the two ends of the top of the support structure are respectively installed on the outer sides of the adjusting device and the connecting device.

[0006] Preferably, the adjusting device comprises: a shell, a bottom plate, a top cover, a first adjusting disc, a second adjusting disc, a first motor, a second motor, a first shaft roller and a second shaft roller, the outer wall of the shell is fixedly connected with a 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 formed in the bottom plate at a rotation angle of 90°, the top cover is detachably installed at one end of the shell away from the third flange, the first adjusting disc is rotatably installed in the inner cavity of the shell, the first adjusting disc is provided with a second air hole and a third air hole, the second air hole is circular in structure, the second air hole is the same size as the first air hole and is located on the same radius, the third air hole is elliptical in structure, the second air hole and the third air hole are distributed at a rotation angle of 90°, and one end of the third air hole is located at the center of the first adjusting disc, the second adjusting disc is rotatably installed in the inner cavity of the shell, the second adjusting disc is provided with a fourth air hole, the fourth air hole is the same structure as the third air hole, and one end of the fourth air hole is located at the center of the second adjusting disc, the fourth air hole is in communication with the third air hole, the first motor is installed on the top cover, the second motor is installed on the top cover and adjacent to the first motor, the first shaft roller is arranged in the inner cavity of the shell and connected with 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 disc, and the second shaft roller is arranged in the inner cavity of the shell and connected with 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 disc.

[0007] Preferably, the inner cavity of the shell is sequentially distributed with the bottom plate, the first adjusting disc, the second adjusting disc and the top cover.

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

[0009] Preferably, the connecting device comprises: a connecting rod, an electronic valve and a connecting pipe, one end of the connecting rod is fixedly connected with a fourth flange, four connecting holes are formed in the extending direction of the connecting rod, the four connecting holes correspond to the positions of the four air grooves, the number of the electronic valves is four, the four electronic valves are respectively installed in the four connecting holes, and the number of the connecting pipes is four.

[0010] Preferably, the support structure comprises: a support ring, a support plate and a support leg, the number of the support rings is two, the two support rings are respectively located outside the adjusting device and the connecting device, the support ring is a two-section structure, forms a ring structure and is fixed by bolts, the support plate is installed at the bottom end of the two support rings, and the number of the support legs is two, the two support legs are installed at the two sides of the bottom surface of the support plate in an eight-character structure.

[0011] The acetic acid evaporation and impurity removal equipment in diketene production has the beneficial effects that:

[0012] The patent is focused on the acetic acid evaporation and impurity removal equipment in diketene production, and has advantages in filtering effect, applicability and functionality, operation convenience and equipment stability, providing strong support for diketene production.

[0013] 1. The unique gas groove structure is designed to allow gas to reciprocate through two sections of the gas groove within a fixed distance, significantly increasing the time of the gas passing through the filter core and greatly expanding the contact area. In actual filtering of acetic acid vapor, this design allows the vapor to fully contact the filter core, more effectively capturing solid impurities, soluble impurities and liquid phases, greatly improving the accuracy and completeness of the filtration, ensuring higher purity of acetic acid vapor entering the cracking furnace, reducing damage to the furnace tube and improving the efficiency of the cracking reaction.

[0014] 2. By disassembling and assembling different types of filter cores and using the adjusting device to flexibly change the gas flow path, the equipment has strong adaptability. For impurities with different characteristics such as particle size and solubility, appropriate filter cores can be replaced and the gas path can be adjusted to achieve targeted filtration. The same filter core can be used for two-stage filtration at the same filtration distance to save equipment space, and different filter cores can be used to filter multiple impurities simultaneously to meet diverse production needs, significantly improving the applicability and functionality of the equipment.

[0015] 3. The adjusting device is designed very cleverly, with the first motor and the second motor controlling the rotation of the first shaft roller and the second shaft roller, respectively, to precisely adjust the positions of the first adjusting disc and the second adjusting disc. In actual operation, the staff can easily achieve these operations through an external controller, quickly select the appropriate inlet pipe and outlet pipe according to different filtration tasks, and adjust the adjusting disc to make the corresponding air holes correspond to the air grooves, achieving quick switching and optimization of the gas path, simple and convenient operation, and effectively improving production efficiency.

[0016] 4. The support structure adopts two two-section support rings, which are fixed by bolts to form a ring, providing stable support for the adjusting device and the connecting device. The support plate and the eight-shaped support foot further enhance the stability of the equipment, ensuring the stability of the entire equipment even during operation, reducing component wear and connection loosening caused by shaking, prolonging the service life of the equipment, and ensuring the continuity and stability of the production process. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure of the present application is shown in the figure;

[0018] Figure 2The schematic diagram of the impurity removal bin of the present application;

[0019] Figure 3 The schematic diagram of the connecting device of the present application;

[0020] Figure 4 The schematic diagram of the adjusting device of the present application;

[0021] Figure 5 The schematic diagram of the first adjusting disc and the second adjusting disc of the present application;

[0022] Figure 6 The schematic diagram of the supporting structure of the present application.

[0023] In the figure: 1, impurity removal bin, 2, placement groove, 3, aeration groove, 4, cover plate, 5, first flange, 6, second flange, 7, adjusting device, 701, shell, 702, third flange, 703, bottom plate, 704, first air hole, 705, top cover, 706, first adjusting disc, 707, second air hole, 708, third air hole, 709, second adjusting disc, 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, supporting structure, 901, supporting ring, 903, supporting plate, 904, supporting leg. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0025] Please refer to Figures 1-6 The present application provides a kind of acetic acid evaporation impurity removal equipment technical scheme in diketene production, its detailed connecting means, prior art, the following mainly introduces working principle and process, specific work as follows.

[0026] A kind of acetic acid evaporation impurity removal equipment in diketene production, including: impurity removal bin 1, placement groove 2, aeration groove 3, cover plate 4, first flange 5, second flange 6, adjusting device 7, connecting device 8, supporting structure 9, four placement grooves 2 are opened with same rotation angle on annular outer wall surface of impurity removal bin 1.

[0027] In the embodiment, four placement grooves 2 can select existing filter core according to needs, different impurities in gas can be filtered.

[0028] The four air vents 3 are arranged in the direction extending along the impurity removal bin 1, and correspond to the four placing grooves 2 respectively, the number of the cover plates 4 is four, the four cover plates 4 are detachably installed on the annular outer wall of the impurity removal bin 1 through bolts, and correspond to the four placing grooves 2, the first flange 5 is fixedly installed at the first end of the impurity removal bin 1, the second flange 6 is fixedly installed at the second end of the impurity removal bin 1, the operating end of the adjusting device 7 is provided with a third flange 702, the third flange 702 is connected with the first flange 5, one end of the connecting device 8 is provided with a fourth flange, and the fourth flange is connected with the second flange 6, and the two ends of the top of the supporting structure 9 are installed on the outer sides of the adjusting device 7 and the connecting device 8 respectively.

[0029] More specifically, the adjusting device 7 comprises a shell 701, a bottom plate 703, a top cover 705, a first adjusting disc 706, a second adjusting disc 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 with 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 arranged 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 disc 706 is rotatably installed in the inner cavity of the shell 701, the first adjusting disc 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 size of the second air hole 707 is the same as that of the first air hole 704, and the second air hole 707 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°, and one end of the third air hole 708 is located at the center of the first adjusting disc 706, the second adjusting disc 709 is rotatably installed in the inner cavity of the shell 701, the second adjusting disc 709 is provided with a fourth air hole 710, 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 disc 709, the fourth air hole 710 is in communication with the third air hole 708, and the communication position of the fourth air hole 710 and the third air hole 708 is the center of the first adjusting disc 706 and the second adjusting disc 709.

[0030] In this embodiment, the bottom plate 703, the first adjusting disc 706, the second adjusting disc 709 and the top cover 705 are sequentially arranged in the inner cavity of the shell 701.

[0031] In this embodiment, sliding sealing rings are arranged between the bottom plate 703, the first adjusting disc 706, the second adjusting disc 709 and the top cover 705, so as to ensure the sealing property between the parts during the adjustment process and ensure the gas flow along the adjusted channel.

[0032] In the embodiment, the thickness of the first adjusting disc 706 and the second adjusting disc 709 ensures that the flow of the gas meets the flow of the gas in the air passage 3.

[0033] The first motor 711 is installed on the top cover 705, the second motor 712 is installed on the top cover 705 and adjacent to the first motor 711, the first shaft roller 713 is arranged in the inner cavity of the shell 701 and connected with the output end of the first motor 711, the outer wall of the first shaft roller 713 is engaged with the annular outer wall of the first adjusting disc 706, and the second shaft roller 714 is arranged in the inner cavity of the shell 701 and connected with the output end of the second motor 712, the outer wall of the second shaft roller 714 is engaged with the annular outer wall of the second adjusting disc 709.

[0034] In the embodiment, the first motor 711 and the second motor 712 are both servo motors, and the engagement of the shaft roller and the adjusting disc can use friction engagement or gear engagement according to actual needs; the outer walls of the first adjusting disc 706, the second adjusting disc 709, the first shaft roller 713 and the second shaft roller 714 can be provided with engagement teeth according to the engagement requirements.

[0035] The first motor 711 and the second motor 712 are driven to adjust the rotation angles of the first adjusting disc 706 and the second adjusting disc 709 respectively; when it is needed to turn and filter, the communication structure of the third air hole 708 and the fourth air hole 710 at the center of the circle is used to guide the gas to change the flow direction, enter the corresponding air passage 3 through the eccentric elliptical hole, and realize directional filtering in cooperation with the filter element of the impurity removal bin 1.

[0036] 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 with the fourth flange, four connecting holes 802 are formed in the extension direction of the connecting rod 801, the four connecting holes 802 correspond to the positions of the four air passages 3, the number of the electronic valves 803 is four, and the four electronic valves 803 are respectively installed in the four connecting holes 802, and the number of the connecting pipes 804 is four, and the four connecting pipes 804 are respectively installed on the four connecting holes 802.

[0037] More specifically, the supporting structure 9 includes: a supporting ring 901, a supporting plate 903, and a supporting leg 904, the number of the supporting rings 901 is two, and the two supporting rings 901 are respectively located outside the adjusting device 7 and the connecting device 8.

[0038] In the embodiment, the supporting ring 901 is a two-section structure, forms a ring structure, and is fixed by bolts.

[0039] The supporting plate 903 is installed at the bottom end of the two supporting rings 901, the number of the supporting legs 904 is two, and the two supporting legs 904 are installed in an eight-character structure on the two sides of the bottom surface of the supporting plate 903.

[0040] Firstly, four cover plates 4 can be removed, different filter cartridges can be placed in four placing grooves 2 according to the filtered substances, and the cover plates 4 are fixed on the impurity removal bin 1 by using bolts, the first motor 711, the second motor 712 and the four electronic valves 803 are connected with an external controller respectively, the first motor 711 and the second motor 712 are controlled to rotate by the controller, two connecting pipes 804 can be selected as the air inlet pipe and the air outlet pipe according to the filtered substances, and the two connecting pipes 804 are connected with external equipment, the first motor 711 controls the first shaft roller 713 to rotate, controls the first adjusting disc 706 to rotate, makes one end of the third air hole 708 far away from the center of the first adjusting disc 706 correspond to one air passage groove 3 connected with the external equipment, then the second motor 712 is controlled to control the second shaft roller 714 to rotate, controls the second adjusting disc 709 to rotate, makes one end of the fourth air hole 710 far away from the center of the second adjusting disc 709 correspond to another air passage groove 3 connected with the external equipment, at this time, the two connecting pipes 804 connected with the external equipment form a closed loop through the adjusting equipment, and the acetic acid vapor passes through the loop, and the vapor can be filtered according to the filtering conditions of the filter cartridges;

[0041] If different substances need to be filtered, the connecting air outlet pipe and the air inlet pipe are adjusted according to the different filter cartridges, the first adjusting disc 706 is controlled, the third air hole 708 corresponds to one connecting pipe 804, the second adjusting disc 709 is adjusted, the fourth air hole 710 corresponds to another connecting pipe 804, and the two corresponding air passage grooves 3 are closed and communicated.

[0042] In the filtering process, the same two filter cartridges can be installed in the two air passage grooves 3, so that two filtering processes are realized in the same filtering distance, the volume of the equipment is saved, or different filter cartridges are used to filter different impurities in the gas.

[0043] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An acetic acid evaporation and impurity removal apparatus in diketene production, characterized by, It includes: Impurity removal bin (1), the annular outer wall surface of the impurity removal bin (1) is provided with four placing grooves (2) at the same rotation angle, and the impurity removal bin (1) is provided with four ventilation grooves (3) in the direction of the extension of the impurity removal bin (1), the four ventilation grooves (3) correspond to and communicate with the four placing grooves (2) respectively; Cover plate (4), the number of the cover plate (4) is four, the four cover plates (4) are detachably mounted on the annular outer wall of the impurity removal bin (1) through bolts, and correspond to the four placing grooves (2); First flange (5), fixedly installed at the first end of the impurity removal bin (1); Second flange (6), fixedly installed at the second end of the impurity removal bin (1); Adjusting device (7), the third flange (702) is installed at the working end, and the third flange (702) is connected with the first flange (5); Connecting device (8), one end is provided with a fourth flange, and the fourth flange is connected with the second flange (6); Supporting structure (9), both ends of the top of the supporting structure (9) are respectively installed on the outer side of the adjusting device (7) and the outer side of the connecting device (8); The adjusting device (7) comprises: Housing (701), the outer wall of the housing (701) is fixedly connected with the third flange (702); Bottom plate (703), installed in the inner cavity of the housing (701), and located in the same plane with the third flange (702), four first air holes (704) are formed in the bottom plate (703) at a rotation angle of 90°; First adjusting disc (706), rotatably installed in the inner cavity of the housing (701); Second adjusting disc (709), rotatably installed in the inner cavity of the housing (701); The first adjusting disc (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 size of the second air hole (707) is the same as that of the first air hole (704), and they are 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°, and one end of the third air hole (708) is located at the center of the first adjusting disc (706); The second adjusting disc (709) is provided with a fourth air hole (710), 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 disc (709), and the fourth air hole (710) is in communication with the third air hole (708).

2. The acetic acid evaporative impurity removal apparatus in diketene production according to claim 1, characterized in that, The adjusting device (7) further comprises: Top cover (705), detachably mounted on one end of the housing (701) away from the third flange (702); First motor (711), installed on the top cover (705); Second motor (712), installed on the top cover (705) and adjacent to the first motor (711); First shaft roller (713), arranged in the inner cavity of the housing (701) and connected with the output end of the first motor (711), the outer wall of the first shaft roller (713) is engaged with the annular outer wall of the first adjusting disc (706); The second shaft roller (714) is arranged in the inner cavity of the shell (701) and is connected with the output end of the second motor (712), and the outer wall of the second shaft roller (714) is engaged with the annular outer wall of the second adjusting disc (709).

3. The acetic acid vaporization and impurity removal equipment in diketene production according to claim 2, characterized in that: In the inner cavity of the shell (701), the bottom plate (703), the first adjusting disc (706), the second adjusting disc (709) and the top cover (705) are sequentially arranged.

4. The acetic acid evaporation and impurity removal equipment in diketene production according to claim 3, characterized in that: Sliding sealing rings are arranged between the bottom plate (703), the first adjusting disc (706), the second adjusting disc (709) and the top cover (705).

5. The acetic acid vaporization and impurity removal apparatus in diketene production according to claim 4, characterized in that, The connecting device (8) comprises: A connecting rod (801) is fixedly connected at one end with the fourth flange, and four connecting holes (802) are formed in the extending direction of the connecting rod (801), and the four connecting holes (802) correspond to the positions of the four air grooves (3); The electronic valves (803) are four in number, and the four electronic valves (803) are respectively installed in the four connecting holes (802); The connecting pipes (804) are four in number, and the four connecting pipes (804) are respectively installed on the four connecting holes (802).

6. The acetic acid vaporization and impurity removal apparatus in diketene production according to claim 5, characterized in that, The support structure (9) comprises: The support rings (901) are two in number, and the two support rings (901) are respectively located on the outer sides of the adjusting device (7) and the connecting device (8); The support plates (903) are installed at 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 in a figure-of-eight structure on the two sides of the bottom surface of the support plate (903).

7. The acetic acid vaporization and impurity removal equipment in diketene production according to claim 6, characterized in that, The support ring (901) is a two-section structure, forms an annular structure, and is fixed by bolts.

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