A methanol cracking device

Abstract

The utility model discloses a methanol cracking device, including the cracking kettle, the support leg is connected to the cracking kettle lower extreme, the first liquid inlet pipe is connected with the first liquid inlet pipe in the cracking kettle left end upside intercommunication, the second liquid inlet pipe is connected with the second liquid inlet pipe in the cracking kettle right end upside intercommunication, the dispersion mixing subassembly is connected between the first liquid inlet pipe and the second liquid inlet pipe, a plurality of spin mixes reaction separation subassembly are connected with the dispersion mixing subassembly lower extreme intercommunication, the outlet pipe is connected with the cracking kettle upper end intercommunication, the recovery pipe is connected with the cracking kettle front end downside intercommunication, the dispersion mixing subassembly includes first dispersion pipe, second dispersion pipe, intercommunication pipe and primary mixing pipe, the utility model discloses through first distribution pipe, second distribution pipe, first dispersion pipe and second dispersion pipe of mutual alternate setting and the unique design of "V" intercommunication pipe, has realized methanol and the multistage dispersion and premixing of catalyst, thereby has increased the contact area and initial mixing evenness of two kinds of liquid, has laid solid foundation for subsequent high -efficient cracking.

Description

Technical Field

[0001] This utility model relates to the field of methanol cracking equipment, and in particular to a methanol cracking equipment. Background Technology

[0002] Traditional methanol cracking to gas production units typically employ simple batch or tower reactors. The feeding method usually involves directly injecting methanol and catalyst into the reactor for mixing, which results in problems such as uneven initial mixing and insufficient contact of reactants, leading to low reaction efficiency.

[0003] Meanwhile, conventional equipment often separates the mixing, reaction and separation processes, and the gas-liquid mixture after the reaction needs to be transferred to a separate separation device for processing, which makes the process long and the equipment complex.

[0004] To address the aforementioned issues, this patent proposes a methanol cracking device capable of achieving efficient mixing, reaction, and separation of reactants, thereby resolving the aforementioned technical bottlenecks. Utility Model Content

[0005] The main purpose of this invention is to propose a methanol cracking device that addresses the problems of uneven initial mixing and insufficient contact of reactants in traditional methanol cracking devices that directly inject methanol and catalyst, as mentioned in the background art.

[0006] To solve the above problems, this utility model proposes a methanol cracking device, including a cracking vessel (1), a support leg (2) connected to the lower end of the cracking vessel (1), a first liquid inlet pipe (3) connected to the upper left side of the cracking vessel (1), a second liquid inlet pipe (4) connected to the upper right side of the cracking vessel (1), a dispersion mixing component connected between the first liquid inlet pipe (3) and the second liquid inlet pipe (4), a plurality of vortex mixing reaction separation components connected to the lower end of the dispersion mixing component, an exhaust pipe (5) connected to the upper end of the cracking vessel (1), and a recovery pipe (6) connected to the lower front end of the cracking vessel (1).

[0007] In one embodiment, the dispersion and mixing assembly includes a first dispersion tube (8), a second dispersion tube (10), a connecting conduit (11), and a primary mixing tube (12), with a first distribution tube (7) connected to the right end of the first inlet tube (3).

[0008] In one embodiment, the right end of the first distribution pipe (7) is connected to a plurality of first dispersion pipes (8), and the first distribution pipe (7) and the plurality of first dispersion pipes (8) are both located inside the pyrolysis vessel (1).

[0009] In one embodiment, the left end of the second inlet pipe (4) is connected to a second distribution pipe (9), the left end of the second distribution pipe (9) is connected to a plurality of second dispersion pipes (10), and the second distribution pipe (9) and the plurality of second dispersion pipes (10) are all located inside the pyrolysis vessel (1).

[0010] In one embodiment, a plurality of first dispersion tubes (8) and a plurality of second dispersion tubes (10) are alternately arranged, and a plurality of connecting conduits (11) arranged in a “V” shape are connected between the first dispersion tubes (8) and the second dispersion tubes (10).

[0011] In one embodiment, the lower ends of the plurality of connecting conduits (11) are all connected to a primary mixing tube (12), and are connected to a vortex mixing reaction separation component through the plurality of primary mixing tubes (12). The interior of the plurality of primary mixing tubes (12) is provided with a spiral plate (13).

[0012] In one embodiment, the swirling reaction separation assembly includes a collection tank (14), a tangential conduit (15), and a hydrocyclone (16). A plurality of primary mixing tubes (12) are connected to the upper end of the uppermost collection tank (14), and a plurality of tangential conduits (15) are connected to the outer side of the lower end of the collection tank (14).

[0013] In one embodiment, a hydrocyclone (16) is connected between a plurality of the tangential conduits (15). The hydrocyclone (16) is cylindrical on the upper side and inverted conical on the lower side. The tangential conduits (15) are connected in the tangential direction of the outer wall of the cylindrical hydrocyclone (16).

[0014] In one embodiment, the lower end of the hydrocyclone (16) is connected to the center of the upper end of the adjacent collection tank (14) on the lower side, and the center of the upper end of the hydrocyclone (16) is connected to a gas guide pipe (17), which is connected to the interior of the pyrolysis vessel (1) through the gas guide pipe (17).

[0015] In one embodiment, the inverted cone of the hydrocyclone (16) is covered with a heating jacket (18), and the lower end of the hydrocyclone (16) is connected to a recovery chamber (19), which is located inside the lower end of the pyrolysis vessel (1) and is connected to the recovery pipe (6).

[0016] Beneficial effects: 1. This utility model achieves multi-stage dispersion and premixing of methanol and catalyst through the unique design of the first distribution pipe, the second distribution pipe, the alternating first dispersion pipe and the second dispersion pipe, and the "V"-shaped connecting conduit, thereby increasing the contact area and initial mixing uniformity of the two liquids and laying a solid foundation for subsequent efficient pyrolysis.

[0017] 2. The spiral plate installed in the initial mixing tube of this utility model can guide the mixture to flow downward in a spiral, prolonging the flow path and residence time of the mixture in the tube, and improving the uniformity of the initial mixing.

[0018] 3. This utility model integrates the collection tank, tangential conduit and hydrocyclone into one unit. The tangential feeding causes the mixture to generate a strong swirling flow in the hydrocyclone, which efficiently integrates the three functions of mixing, reaction (heating and cracking) and gas-liquid separation into one unit, greatly improving the reaction efficiency and separation efficiency, and the equipment is small in size.

[0019] 4. This utility model adopts multiple swirling reaction separation components arranged in series from top to bottom to form a multi-stage continuous reaction and separation system, ensuring that the mixture can be repeatedly cracked through multiple reaction environments in sequence, thereby maximizing the single-pass conversion rate of methanol and the utilization rate of raw materials, and reducing the emission of unreacted products. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the methanol cracking device of this utility model; Figure 2 This is a three-dimensional cross-sectional structural diagram of the methanol cracking device of this utility model; Figure 3 This is a schematic diagram of the structure of the dispersion mixing component of this utility model; Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the structure of the vortex mixing reaction separation component of this utility model.

[0022] The annotations in the attached figures are explained as follows: 1. Cracking vessel; 2. Support leg; 3. First liquid inlet pipe; 4. Second liquid inlet pipe; 5. Gas outlet pipe; 6. Recovery pipe; 7. First distribution pipe; 8. First dispersion pipe; 9. Second distribution pipe; 10. Second dispersion pipe; 11. Connecting conduit; 12. Initial mixing pipe; 13. Spiral plate; 14. Collection bucket; 15. Tangential conduit; 16. Hydrocyclone; 17. Gas guide pipe; 18. Heating jacket; 19. Recovery chamber. Detailed Implementation

[0023] 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.

[0024] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0027] This utility model provides, for example Figures 1-5The methanol cracking device shown includes a cracking vessel 1, with a support leg 2 connected to the lower end of the cracking vessel 1. A first inlet pipe 3 is connected to the upper left side of the cracking vessel 1, and a second inlet pipe 4 is connected to the upper right side of the cracking vessel 1. A dispersion mixing component is connected between the first inlet pipe 3 and the second inlet pipe 4. Multiple swirl mixing reaction separation components are connected to the lower end of the dispersion mixing component. A gas outlet pipe 5 is connected to the upper end of the cracking vessel 1, and a recovery pipe 6 is connected to the lower front end of the cracking vessel 1. During the process of producing fuel gas through methanol cracking, methanol and catalyst are introduced into the dispersion mixing component of the cracking vessel 1 through the first inlet pipe 3 and the second inlet pipe 4 for preliminary mixing. Then, the preliminary mixed methanol and catalyst mixture is sequentially introduced into the multiple swirl mixing reaction separation components from top to bottom for continuous remixing. The methanol and catalyst mixture is heated to promote the cracking of methanol into fuel gas. The cracked fuel gas enters the cracking vessel 1 and is discharged for use through the gas outlet pipe 5. The incompletely cracked methanol and catalyst flow to the bottom of the cracking vessel 1 and are discharged through the recovery pipe 6 for recycling.

[0028] Preferably, the dispersion and mixing assembly includes a first dispersion tube 8, a second dispersion tube 10, a connecting conduit 11, and a primary mixing tube 12. The right end of the first inlet pipe 3 is connected to a first distribution pipe 7, and the right end of the first distribution pipe 7 is connected to multiple first dispersion tubes 8. Both the first distribution pipe 7 and the multiple first dispersion tubes 8 are located inside the cracking reactor 1. The left end of the second inlet pipe 4 is connected to a second distribution pipe 9, and the left end of the second distribution pipe 9 is connected to multiple second dispersion tubes 10. Both the second distribution pipe 9 and the multiple second dispersion tubes 10 are located inside the cracking reactor 1. The multiple first dispersion tubes 8 and the multiple second dispersion tubes 10 are alternately arranged. Multiple connecting conduits 11 arranged in a "V" shape connect the first dispersion tubes 8 and the second dispersion tubes 10. The lower ends of each of the multiple connecting conduits 11 are connected to primary mixing tubes 12, and these primary mixing tubes 12 are connected to a vortex mixing reaction separation assembly. Each of the multiple primary mixing tubes 12 has a spiral plate 13 inside. During the initial mixing of methanol and the catalyst, methanol passes through... The methanol and catalyst are introduced into the first distribution pipe 7 through the first inlet pipe 3 and then dispersed into multiple first dispersion pipes 8 through the first distribution pipe 7. At the same time, the catalyst is introduced into the second distribution pipe 9 through the second inlet pipe 4 and then dispersed into multiple second dispersion pipes 10 through the second distribution pipe 9. Since the adjacent first dispersion pipes 8 and second dispersion pipes 10 are interconnected by multiple "V"-shaped connecting conduits 11 and connected to the initial mixing pipe 12 through the connecting conduits 11, the methanol and catalyst inside the first dispersion pipes 8 and second dispersion pipes 10 can be further dispersed through the multiple connecting conduits 11 and simultaneously introduced into the initial mixing pipe 12. This allows the methanol and catalyst to be initially mixed in the initial mixing pipe 12, and the methanol and catalyst can flow spirally downward in the initial mixing pipe 12 through the spiral plate 13. This not only improves the initial mixing uniformity of methanol and catalyst but also increases the path length of methanol and catalyst flowing through the initial mixing pipe 12, thereby increasing the mixing time.

[0029] Preferably, the swirling reaction separation assembly includes a collection tank 14, tangential conduits 15, and hydrocyclones 16. Multiple initial mixing pipes 12 are connected to the upper end of the uppermost collection tank 14. Multiple tangential conduits 15 are connected to the outer lower end of the collection tank 14. Hydrocyclones 16 are connected between the multiple tangential conduits 15. The upper side of the hydrocyclone 16 is cylindrical, and the lower side is inverted conical. The tangential conduits 15 are connected tangentially to the outer wall of the cylindrical hydrocyclone 16, and the lower end of the hydrocyclone 16 is connected to the center of the upper end of the adjacent lower collection tank 14. A gas guide pipe 17 is connected to the center of the upper end of the hydrocyclone 16, and the gas guide pipe 17 connects to the interior of the pyrolysis reactor 1. A heating jacket 18 surrounds the inverted conical shape of the hydrocyclone 16. The lowermost hydrocyclone 16... The lower end of the 6 is connected to the recovery chamber 19, which is located inside the lower end of the cracking vessel 1 and is connected to the recovery pipe 6. During the process of introducing the methanol and catalyst mixture into the cyclone reaction separation component, the initially mixed mixture is collected by the collection tank 14 and then dispersed again. The collection tank 14 passes the collected mixture into multiple tangential conduits 15 and introduces it into the cyclone separator 16 along the tangential direction of the upper cylinder of the cyclone separator 16. This allows the mixture to swirl inside the cyclone separator 16 and be mixed again through the swirl. At the same time, the heating jacket 18 heats the inside of the cyclone separator 16, causing the methanol to crack as it flows through the cyclone separator 16.

[0030] At this point, the heavier uncracked methanol and catalyst are thrown towards the conical inner wall of the lower side of the hydrocyclone 16 by the centrifugal force of the swirling flow. They flow downward along the conical inner wall and are sequentially introduced into the multiple swirling reaction separation components below for multiple cracking processes, thereby improving the utilization rate of methanol. The lighter fuel gas remains in the middle of the hydrocyclone 16 and is introduced into the cracking vessel 1 through the gas guide pipe 17 for collection. Finally, it is discharged through the gas outlet pipe 5 for use. The uncracked methanol and catalyst will flow into the recovery chamber 19 located below the multiple swirling reaction separation components for collection and be discharged through the recovery pipe 6 for recycling.

[0031] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A methanol cracking unit, characterized in that, The pyrolysis vessel (1) is connected to a support leg (2) at its lower end. A first liquid inlet pipe (3) is connected to the upper left side of the pyrolysis vessel (1), and a second liquid inlet pipe (4) is connected to the upper right side of the pyrolysis vessel (1). A dispersion mixing component is connected between the first liquid inlet pipe (3) and the second liquid inlet pipe (4). A plurality of vortex mixing reaction separation components are connected to the lower end of the dispersion mixing component. An exhaust pipe (5) is connected to the upper end of the pyrolysis vessel (1), and a recovery pipe (6) is connected to the lower front end of the pyrolysis vessel (1).

2. The methanol cracking apparatus as described in claim 1, characterized in that, The dispersion and mixing assembly includes a first dispersion tube (8), a second dispersion tube (10), a connecting conduit (11), and a primary mixing tube (12). The right end of the first inlet tube (3) is connected to a first distribution tube (7).

3. The methanol cracking apparatus as described in claim 2, characterized in that, The right end of the first distribution pipe (7) is connected to a plurality of first dispersion pipes (8), and the first distribution pipe (7) and the plurality of first dispersion pipes (8) are all located inside the pyrolysis vessel (1).

4. A methanol cracking apparatus as described in claim 3, characterized in that, The second liquid inlet pipe (4) is connected to the second distribution pipe (9) at its left end. The second distribution pipe (9) is connected to multiple second dispersion pipes (10) at its left end. The second distribution pipe (9) and multiple second dispersion pipes (10) are both located inside the pyrolysis vessel (1).

5. A methanol cracking apparatus as described in claim 4, characterized in that, Multiple first dispersion tubes (8) and multiple second dispersion tubes (10) are alternately arranged, and multiple "V"-shaped connecting conduits (11) are connected between the first dispersion tubes (8) and the second dispersion tubes (10).

6. A methanol cracking apparatus as described in claim 5, characterized in that, The lower ends of the multiple connecting conduits (11) are connected to the initial mixing tubes (12), and are connected to the vortex mixing reaction separation component through the multiple initial mixing tubes (12). The internal parts of the multiple initial mixing tubes (12) are provided with spiral plates (13).

7. A methanol cracking apparatus as described in claim 6, characterized in that, The swirling reaction separation assembly includes a collection tank (14), a tangential conduit (15), and a hydrocyclone (16). Multiple primary mixing tubes (12) are connected to the upper end of the uppermost collection tank (14), and multiple tangential conduits (15) are connected to the outer side of the lower end of the collection tank (14).

8. A methanol cracking apparatus as described in claim 7, characterized in that, A hydrocyclone (16) is connected between multiple tangential conduits (15). The upper side of the hydrocyclone (16) is cylindrical and the lower side is inverted conical. The tangential conduits (15) are connected in the tangential direction of the outer wall of the cylindrical hydrocyclone (16).

9. A methanol cracking apparatus as described in claim 8, characterized in that, The lower end of the hydrocyclone (16) is connected to the center of the upper end of the adjacent collection tank (14) on the lower side. The center of the upper end of the hydrocyclone (16) is connected to the gas guide pipe (17), and is connected to the inside of the pyrolysis vessel (1) through the gas guide pipe (17).

10. A methanol cracking apparatus as described in claim 9, characterized in that, The inverted cone of the hydrocyclone (16) is covered with a heating jacket (18). The lower end of the hydrocyclone (16) is connected to a recovery chamber (19), which is located inside the lower end of the pyrolysis vessel (1) and is connected to the recovery pipe (6).

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