Separation equipment for the preparation of 2,5-dimethyl-2,4-hexadiene

Abstract

This utility model relates to the field of catalyst technology and discloses a separation device for the preparation of 2,5-dimethyl-2,4-hexadiene, including a fixed-bed reactor body and a support frame fitted outside the fixed-bed reactor body. The top and bottom of the fixed-bed reactor body are respectively provided with a feed pipe and a discharge pipe. The bottom of the discharge pipe is respectively provided with a first composite heat insulation cylinder, a second composite heat insulation cylinder, and a servo motor. This utility model uses a high-temperature dust detector to detect when a mixed gas of 2,5-dimethyl-2,4-hexadiene produced by the fixed-bed reactor body contains a high level of impurities. The servo motor drives the heat insulation base, the first filter cylinder, the second filter cylinder, the first filter screen, and the second filter screen to perform multiple centrifugal separations of the impurities in the mixed gas and output the product. This solves the problems existing in the prior art and further improves the quality of the main raw material production based on the fixed-bed reactor body.

Description

Technical Field

[0001] This utility model relates to the field of catalyst technology, specifically to a separation device for the preparation of 2,5-dimethyl-2,4-hexadiene. Background Technology

[0002] 2,5-Dimethyl-2,4-hexadiene is an important organic chemical raw material, and the research on its synthesis methods has always been a hot topic in the chemical industry. Considering efficiency and environmental protection, the current one-step synthesis method of 2,5-dimethyl-2,4-hexadiene using a specific catalyst can fully meet the above requirements. The specific synthesis steps are as follows: a feed gas with a mass ratio of isobutyraldehyde to isobutene of 1:3 to 4 is introduced into a fixed-bed reactor, the reaction pressure is 0.1 to 0.3 MPa, nitrogen is used as the carrier gas, the mass hourly space velocity is 6 to 10 h⁻¹, and the reaction is continued for 24 to 72 hours to obtain the 2,5-dimethyl-2,4-hexadiene feed gas.

[0003] However, during long-term continuous use, the catalyst inside the fixed-bed reactor is prone to cracking and pulverization under the influence of factors such as thermal stress, pressure fluctuations, or excessively high gas flow rates. This results in a high impurity content in the 2,5-dimethyl-2,4-hexadiene feed gas produced by the fixed-bed reactor, affecting the processing quality of subsequent processes. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a separation device for the preparation of 2,5-dimethyl-2,4-hexadiene, which solves the problems mentioned in the background section.

[0005] This utility model provides the following technical solution: a separation device for the preparation of 2,5-dimethyl-2,4-hexadiene, comprising a fixed-bed reactor body and a support frame fitted outside the fixed-bed reactor body. The top and bottom of the fixed-bed reactor body are respectively provided with a feed pipe and a discharge pipe. The bottom of the discharge pipe is respectively provided with a first composite heat insulation cylinder, a second composite heat insulation cylinder, and a servo motor. The first composite heat insulation cylinder is installed between the bottom of the discharge pipe and the top of the second composite heat insulation cylinder, creating spatial communication between the discharge pipe and the second composite heat insulation cylinder. The front of the first composite heat insulation cylinder... A first solenoid valve tube and a high-temperature dust detector are respectively installed at one end and one side. The detection end of the high-temperature dust detector is fitted inside the bottom of one side of the first composite heat insulation cylinder. The output end of the servo motor is driven and connected to a heat insulation base fitted inside the bottom of the second composite heat insulation cylinder. A first filter cylinder and a second filter cylinder are arranged and installed on the top of the heat insulation base, and the top of the first filter cylinder and the top of the second filter cylinder are both in contact with the inner wall of the top of the second composite heat insulation cylinder and can rotate synchronously with the heat insulation base. A second solenoid valve tube is installed at the bottom of the second composite heat insulation cylinder.

[0006] Preferably, a transition solenoid valve tube is installed on the top of the second composite heat insulation cylinder, and an auxiliary bracket is connected to the rear end surface of the first composite heat insulation cylinder and the rear end surface of the second composite heat insulation cylinder. The bottom of the auxiliary bracket is fixed inside the bottom of the support frame.

[0007] Preferably, the surface of the servo motor housing is fixed with an auxiliary support mounted on the inner wall of the bottom of the support frame, and the top of the auxiliary support is provided with a ventilation slot.

[0008] Preferably, the inner walls of the first filter cylinder and the second filter cylinder are respectively provided with a first filter groove and a second filter groove, and a first filter screen and a second filter screen are respectively nested in the first filter groove and the second filter groove, and the mesh number of the first filter screen is smaller than the mesh number of the second filter screen.

[0009] Preferably, a sealing assembly is provided between the top of the first filter element and the inner wall of the top of the second composite heat insulation cylinder, and between the top of the second filter element and the inner wall of the top of the second composite heat insulation cylinder. The sealing assembly includes a positioning ring plate, and a first high-temperature resistant sealing ring is fixed on the inner wall of the positioning ring plate, which can fit against the top surface of the first filter element or the top surface of the second filter element.

[0010] Preferably, flanges are fixed to the ends of the first solenoid valve tube and the second solenoid valve tube that are away from the fixed bed reactor body, and auxiliary solenoid valves are provided in the middle of the first solenoid valve tube and the middle of the second solenoid valve tube.

[0011] Preferably, a second high-temperature resistant sealing ring and an auxiliary bearing are nested and installed on the surface of the heat insulation base and the inner wall of the bottom of the second composite heat insulation cylinder, and the surface of the second high-temperature resistant sealing ring is glued and fixed to the inner wall of the bottom of the second composite heat insulation cylinder.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model forms a multifunctional filtration and separation mechanism inside the second composite heat insulation cylinder by setting a heat insulation base, a first filter cylinder, a second filter cylinder, a first filter screen, a second solenoid valve tube, and a second filter screen. After being used in conjunction with the fixed bed reactor body and the first composite heat insulation cylinder, when the set high-temperature dust detector detects that the 2,5-dimethyl-2,4-hexadiene mixed gas produced by the fixed bed reactor body contains a high amount of impurities, the servo motor drives the heat insulation base, the first filter cylinder, the second filter cylinder, the first filter screen, and the second filter screen to perform multiple centrifugal separations of the impurities contained in the 2,5-dimethyl-2,4-hexadiene mixed gas and output them. This solves the problems existing in the prior art and further improves the production quality of 2,5-dimethyl-2,4-hexadiene on the basis of the fixed bed reactor body.

[0014] 2. This utility model uses a first solenoid valve tube and a transition solenoid valve tube as auxiliary structures. When the high-temperature dust detector detects qualified 2,5-dimethyl-2,4-hexadiene mixed gas with low impurity content produced by the fixed bed reactor, the transition solenoid valve tube seals the space between the first composite heat insulation cylinder and the second composite heat insulation cylinder, and the first solenoid valve tube provides a direct output channel. This further expands the overall equipment's effectiveness and efficiency, and also extends the service life of some structures. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a left-side view of the structure of this utility model;

[0017] Figure 3 This is a cross-sectional schematic diagram of the second composite connecting tube of this utility model.

[0018] Figure 4 This is a bottom view of the structural adjustment base of this utility model;

[0019] Figure 5 The structure of this utility model Figure 3 Enlarged diagram of point A in the middle.

[0020] In the diagram: 1. Fixed-bed reactor body; 101. Feed pipe; 102. Discharge pipe; 2. Support frame; 3. First composite heat insulation cylinder; 4. Second composite heat insulation cylinder; 5. Heat insulation base; 6. First filter element; 7. Second filter element; 8. First filter screen; 9. Second filter screen; 10. Servo motor; 11. High-temperature dust detector; 12. First solenoid valve tube; 13. Second solenoid valve tube; 14. Auxiliary support; 15. Positioning ring plate; 16. First high-temperature resistant sealing ring; 17. Second high-temperature resistant sealing ring; 18. Auxiliary bearing. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-5 A separation device for the preparation of 2,5-dimethyl-2,4-hexadiene includes a fixed-bed reactor body 1 and a support frame 2 fitted outside the fixed-bed reactor body 1. The top and bottom of the fixed-bed reactor body 1 are respectively provided with a feed pipe 101 and a discharge pipe 102. The bottom of the discharge pipe 102 is respectively provided with a first composite heat insulation cylinder 3, a second composite heat insulation cylinder 4, and a servo motor 10. The first composite heat insulation cylinder 3 is installed between the bottom of the discharge pipe 102 and the top of the second composite heat insulation cylinder 4, and the discharge pipe 102 and the second composite heat insulation cylinder 4 are spatially connected. The top of the second composite heat insulation cylinder 4 is equipped with a transition solenoid valve pipe, thereby providing flexible opening and closing conditions for the spatial linkage between the first composite heat insulation cylinder 3 and the second composite heat insulation cylinder 4. The rear end surface of the first composite heat insulation cylinder 3 and the rear end surface of the second composite heat insulation cylinder 4 are connected to an auxiliary support 14. The bottom of the auxiliary support 14 is fixed inside the bottom of the support frame 2, thereby ensuring the stable effect of continuous use of the first composite heat insulation cylinder 3 and the second composite heat insulation cylinder 4.

[0023] The front end and one side of the first composite heat insulation cylinder 3 are respectively provided with a first solenoid valve tube 12 and a high-temperature dust detector 11. The detection end of the high-temperature dust detector 11 is fitted into the bottom of one side of the first composite heat insulation cylinder 3. The end of the first solenoid valve tube 12 away from the fixed bed reactor body 1 and the end of the second solenoid valve tube 13 away from the fixed bed reactor body 1 are both fixed with flanges, which provides favorable conditions for the subsequent assembly of the condensation collection device. Auxiliary solenoid valves are provided in the middle of the first solenoid valve tube 12 and the middle of the second solenoid valve tube 13 for easy opening and closing adjustment. The output end of the servo motor 10 is connected to the heat insulation base 5 fitted inside the bottom of the second composite heat insulation cylinder 4. The surface of the servo motor 10 is fixed with an auxiliary support installed on the bottom inner wall of the support frame 2. The top of the auxiliary support is provided with a ventilation groove. In addition to the stable support of the servo motor 10 by the auxiliary support, the ventilation groove inside can also ensure the heat dissipation effect of the servo motor 10 during continuous operation.

[0024] The top of the heat insulation base 5 is equipped with a first filter cylinder 6 and a second filter cylinder 7 arranged in a concentric circle. The top of the first filter cylinder 6 and the top of the second filter cylinder 7 are both attached to the inner wall of the top of the second composite heat insulation cylinder 4 and can rotate synchronously with the heat insulation base 5. The bottom of the second composite heat insulation cylinder 4 is equipped with a second solenoid valve pipe 13. The inner walls of the first filter cylinder 6 and the second filter cylinder 7 are respectively provided with a first filter groove and a second filter groove. The first filter groove and the second filter groove are respectively nested with a first filter screen 8 and a second filter screen 9. The mesh number of the first filter screen 8 is smaller than that of the second filter screen 9. Thus, during the centrifugal filtration of the mixed gas output from the fixed bed reactor body 1 by the first filter cylinder 6 and the second filter cylinder 7 driven by the heat insulation base 5, the impurities in the mixed gas are graded and filtered by the first filter screen 8 and the second filter screen 9, reducing the filtration load of the single first filter screen 8 or the second filter screen 9 and extending the operation time of high-efficiency filtration.

[0025] Sealing components are provided between the top of the first filter element 6 and the top inner wall of the second composite heat insulation cylinder 4, and between the top of the second filter element 7 and the top inner wall of the second composite heat insulation cylinder 4. The sealing components include a positioning ring plate 15, and a first high-temperature resistant sealing ring 16 that can fit against the top surface of the first filter element 6 or the top surface of the second filter element 7 is fixed on the inner wall of the positioning ring plate 15, thereby improving the sealing effect between the structures. A second high-temperature resistant sealing ring 17 and an auxiliary bearing 18 are nested and installed at the fitting point between the surface of the heat insulation base 5 and the bottom inner wall of the second composite heat insulation cylinder 4. The surface of the second high-temperature resistant sealing ring 17 is glued and fixed to the bottom inner wall of the second composite heat insulation cylinder 4, thereby improving the sealing effect between the heat insulation base 5 and the second composite heat insulation cylinder 4.

[0026] In summary, during the specific reaction process of generating 2,5-dimethyl-2,4-hexadiene feedstock gas in the fixed-bed reactor body 1, the technical solution of this application will be adapted and adjusted according to different situations, as follows:

[0027] Example 1

[0028] A feed gas with a mass ratio of isobutyraldehyde to isobutene of 1:3-4 is introduced into the fixed-bed reactor body 1 through feed pipe 101. The reaction pressure is 0.1-0.3 MPa, the carrier gas is nitrogen, and the mass hourly space velocity is 6-10 h⁻¹. After the reaction continues for 24-72 hours, the 2,5-dimethyl-2,4-hexadiene mixed gas produced inside the fixed-bed reactor body 1 enters the first composite heat insulation cylinder 3 through discharge pipe 102. At the same time, the high-temperature dust detector 11 is activated to detect dust in the 2,5-dimethyl-2,4-hexadiene mixed gas inside the first composite heat insulation cylinder 3. After the data value output by the high-temperature dust detector 11 is within the qualified range, the auxiliary solenoid valve set on the first solenoid valve pipe 12 is opened, so that the 2,5-dimethyl-2,4-hexadiene mixed gas is transported to the existing condensation collection device for condensation collection through the first solenoid valve pipe 12.

[0029] Example 2

[0030] The high-temperature dust detector 11 is used to detect dust in the 2,5-dimethyl-2,4-hexadiene mixed gas inside the first composite heat insulation cylinder 3. When the data value output by the high-temperature dust detector 11 exceeds the qualified range, the transition solenoid valve is opened. The 2,5-dimethyl-2,4-hexadiene mixed gas produced inside the fixed bed reactor body 1 enters the first filter cylinder 6 through the channel formed by the discharge pipe 102, the first composite heat insulation cylinder 3 and the transition solenoid valve.

[0031] Next, the servo motor 10 is started, and its output drives the heat insulation base 5, the first filter cartridge 6, the second filter cartridge 7, the first filter screen 8, and the second filter screen 9 to rotate synchronously. Then, the first filter screen 8 and the second filter screen 9 are used to perform multiple centrifugal filtration on the impurities contained in the 2,5-dimethyl-2,4-hexadiene mixed gas. After filtration, impurities of different sizes are temporarily retained inside the first filter cartridge 6 and the second filter cartridge 7, respectively. At the same time, the auxiliary solenoid valve on the second solenoid valve tube 13 is opened, so that the clean 2,5-dimethyl-2,4-hexadiene mixed gas is transported through the second solenoid valve tube 13 to the existing condensation and collection device for condensation and collection. In this way, the 2,5-dimethyl-2,4-hexadiene mixed gas produced by the fixed bed reactor body 1 is filtered, separated, and reprocessed, thereby improving the production quality of the 2,5-dimethyl-2,4-hexadiene mixed gas.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A separation device for the preparation of 2,5-dimethyl-2,4-hexadiene, comprising a fixed-bed reactor body (1) and a support frame (2) fitted around the outside of the fixed-bed reactor body (1), wherein the top and bottom of the fixed-bed reactor body (1) are respectively provided with a feed pipe (101) and a discharge pipe (102), characterized in that: The bottom of the discharge pipe (102) is respectively provided with a first composite heat insulation cylinder (3), a second composite heat insulation cylinder (4), and a servo motor (10). The first composite heat insulation cylinder (3) is installed between the bottom of the discharge pipe (102) and the top of the second composite heat insulation cylinder (4), thereby creating spatial communication between the discharge pipe (102) and the second composite heat insulation cylinder (4). The front end and one side of the first composite heat insulation cylinder (3) are respectively provided with a first solenoid valve pipe (12) and a high-temperature dust detector (11). The detection end of the high-temperature dust detector (11) is fitted onto the first composite heat insulation cylinder (3). Inside the bottom of one side of the composite heat insulation cylinder (3), the output end of the servo motor (10) is connected to the heat insulation base (5) which is fitted inside the bottom of the second composite heat insulation cylinder (4). The top of the heat insulation base (5) is arranged with the first filter cylinder (6) and the second filter cylinder (7) of the same circle. The top of the first filter cylinder (6) and the top of the second filter cylinder (7) are both attached to the inner wall of the top of the second composite heat insulation cylinder (4) and can rotate synchronously with the heat insulation base (5). The bottom of the second composite heat insulation cylinder (4) is equipped with a second solenoid valve pipe (13).

2. The separation equipment for preparing 2,5-dimethyl-2,4-hexadiene according to claim 1, characterized in that: The top of the second composite heat insulation cylinder (4) is equipped with a transition solenoid valve tube. The rear end surface of the first composite heat insulation cylinder (3) and the rear end surface of the second composite heat insulation cylinder (4) are connected together with an auxiliary support (14). The bottom of the auxiliary support (14) is fixed inside the bottom of the support frame (2).

3. The separation apparatus for preparing 2,5-dimethyl-2,4-hexadiene according to claim 1, characterized in that: The servo motor (10) has an auxiliary support fixed on the inner wall of the bottom of the support frame (2) on the housing surface, and the top of the auxiliary support is provided with a ventilation slot.

4. The separation apparatus for preparing 2,5-dimethyl-2,4-hexadiene according to claim 1, characterized in that: The inner wall of the first filter cylinder (6) and the inner wall of the second filter cylinder (7) are respectively provided with a first filter groove and a second filter groove, and a first filter screen (8) and a second filter screen (9) are respectively nested in the first filter groove and the second filter groove. The mesh number of the first filter screen (8) is less than the mesh number of the second filter screen (9).

5. The separation apparatus for preparing 2,5-dimethyl-2,4-hexadiene according to claim 1, characterized in that: A sealing assembly is provided between the top of the first filter cylinder (6) and the top inner wall of the second composite heat insulation cylinder (4), and between the top of the second filter cylinder (7) and the top inner wall of the second composite heat insulation cylinder (4). The sealing assembly includes a positioning ring plate (15), and a first high-temperature resistant sealing ring (16) is fixed on the inner wall of the positioning ring plate (15) to fit against the top surface of the first filter cylinder (6) or the top surface of the second filter cylinder (7).

6. The separation apparatus for preparing 2,5-dimethyl-2,4-hexadiene according to claim 1, characterized in that: Flanges are fixed to the end of the first solenoid valve tube (12) away from the fixed bed reactor body (1) and the end of the second solenoid valve tube (13) away from the fixed bed reactor body (1). Auxiliary solenoid valves are provided in the middle of the first solenoid valve tube (12) and the middle of the second solenoid valve tube (13).

7. The separation apparatus for preparing 2,5-dimethyl-2,4-hexadiene according to claim 1, characterized in that: The surface of the heat insulation base (5) is fitted with a second high-temperature resistant sealing ring (17) and an auxiliary bearing (18) at the bottom inner wall of the second composite heat insulation cylinder (4), and the surface of the second high-temperature resistant sealing ring (17) is glued to the bottom inner wall of the second composite heat insulation cylinder (4).

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