A raw material mixing device for methanol cracking

Abstract

The utility model discloses a raw material mixing device for methanol cracking, including the mixing pipe, the mixing pipe lower extreme is connected with the connector, the mixing pipe cylinder outer wall upper side is connected with a plurality of groups of injection pipe, and a plurality of groups of injection pipe all are by a plurality of vertical distribution's liquid injection branch pipe composition, and show central symmetry and set up, a plurality of groups of injection pipe outside all are connected with the vertical communication pipe, and the opening direction of adjacent two communication pipes is opposite, and shows the alternative setting, and the upper end of a plurality of communication pipes of opening upward and the lower end of a plurality of communication pipes of opening downward all are connected with the distribution pipe, two distribution pipes right -hand members all are connected with the liquid guide pipe, the mixing pipe inner wall upper side is connected with the partition, and the utility model discloses a modular combination of primary injection pipe alternate injection, secondary cyclone stirring and tertiary helical flow guide, realizes gradient mixing optimization, ensures that methanol and catalyst are fully mixed before entering the reaction chamber, shortens the reaction induction time, and improves the overall cracking efficiency.

Description

Technical Field

[0001] This utility model relates to the field of methanol cracking reaction, and in particular to a raw material mixing device for methanol cracking. Background Technology

[0002] In the traditional methanol cracking process, the uniformity of mixing between the raw material methanol and the catalyst directly affects the reaction efficiency and product quality.

[0003] Existing technologies typically employ simple static mixers or mechanical stirring devices for mixing. These methods suffer from problems such as insufficient mixing, uneven local concentration, and delayed reaction, resulting in low pyrolysis efficiency and high energy consumption.

[0004] To address the aforementioned issues, this patent proposes a highly efficient, stable, and multi-stage gradient mixing device for raw materials, ensuring that methanol and catalyst reach optimal mixing before entering the reaction chamber, thereby improving the overall efficiency of the cracking reaction. Utility Model Content

[0005] The main objective of this invention is to provide a raw material mixing device for methanol cracking, which aims to solve the problems of insufficient mixing of raw materials, uneven local concentration, and delayed reaction in traditional methanol cracking reactions mentioned in the background art.

[0006] To address the aforementioned problems, this utility model proposes a raw material mixing device for methanol cracking, comprising a mixing tube with a connector at its lower end. Multiple sets of nozzles are connected to the upper side of the cylindrical outer wall of the mixing tube, each set consisting of multiple vertically distributed liquid spray branches arranged symmetrically at the center. Vertical connecting pipes are connected to the exterior of each set of nozzles, with adjacent connecting pipes having opposite opening directions and alternating arrangements. Distribution pipes are connected to the upper ends of the upward-opening connecting pipes and the lower ends of the downward-opening connecting pipes. Liquid guide pipes are connected to the right ends of both distribution pipes.

[0007] In one embodiment, a partition plate is connected to the upper side of the inner wall of the mixing pipe, and the partition plate is located below multiple spray branch pipes.

[0008] In one embodiment, a liquid collection pipe is connected to the center of the lower end of the partition plate, and multiple swirling nozzles are connected to the outer tangential direction of the liquid collection pipe.

[0009] In one embodiment, the plurality of swirling nozzles are arranged in a centrally symmetrical manner, and a limit ring is provided on the outer side of the lower end of the liquid collection pipe.

[0010] In one embodiment, the limiting ring is connected to the inner wall of the mixing tube, and two rotating rings are rotatably connected between the limiting ring and the partition plate.

[0011] In one embodiment, the two rotating rings are located on the upper and lower sides of the outside of the liquid collecting tube, respectively, and ball grooves are formed on the outer wall of the cylindrical rings.

[0012] In one embodiment, each of the two ball grooves is provided with a plurality of drag-reducing balls, and a plurality of connecting rods are connected to the outer side of the two rotating rings.

[0013] In one embodiment, a plurality of the connecting rods are located outside the collecting tube and rotatably connected inside the mixing tube.

[0014] In one embodiment, multiple stirring plates are connected to one end of each of the connecting rods near the liquid collection pipe, and the multiple stirring plates are located outside the liquid collection pipe.

[0015] In one embodiment, a spiral plate is provided inside the lower end of the mixing tube, and the spiral plate is located below the limiting ring.

[0016] Beneficial effects:

[0017] 1. This utility model adopts multiple sets of centrally symmetrically distributed nozzles. Each set of nozzles consists of multiple vertical liquid spraying branches. The opening directions of adjacent connecting pipes are opposite and alternately arranged, so that methanol and catalyst liquid are alternately sprayed in the circumferential direction of the mixing pipe to achieve primary radial mixing, enhance the initial mixing uniformity, and improve the contact efficiency of reactants.

[0018] 2. The present invention has a mixing tube equipped with a partition plate, a liquid collection pipe and a tangentially arranged swirl nozzle, which makes the mixed liquid form a swirling flow. At the same time, the rotating ring, connecting rod and stirring plate rotate under the impact of the swirling flow to turbulent and stir the liquid, realize two-stage dynamic mixing, further improve the mixing uniformity and reduce local concentration unevenness.

[0019] 3. The lower end of the mixing tube of this utility model is equipped with a spiral plate, which makes the liquid after secondary mixing centrifugally rotate in the spiral channel and extend the flow path to achieve tertiary mixing, ensuring that the final mixed liquid is highly uniform and improving the efficiency of the pyrolysis reaction.

[0020] 4. The rotating ring of this utility model reduces the frictional resistance with the inner wall of the mixing tube through the ball groove and the drag-reducing ball, so that the stirring plate rotates efficiently under the impact of liquid, which enhances the secondary mixing effect, reduces mechanical wear, and improves the long-term stability of the device.

[0021] 5. This utility model achieves gradient mixing optimization through a modular combination of alternating primary nozzle spraying, secondary swirling stirring, and tertiary spiral guiding, ensuring that methanol and catalyst are fully mixed before entering the reaction chamber, shortening the reaction induction time, and improving the overall cracking efficiency. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a three-dimensional structural diagram of the mixing device of this utility model;

[0024] Figure 2 This is a three-dimensional cross-sectional structural diagram of the mixing device of this utility model;

[0025] Figure 3 This is a schematic diagram of the nozzle connection structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the partition plate connection structure of this utility model;

[0027] Figure 5 This is a schematic diagram of the liquid collection pipe connection structure of this utility model;

[0028] Figure 6 This is a schematic diagram of the connecting rod connection structure of this utility model.

[0029] The annotations in the attached figures are explained as follows:

[0030] 1. Mixing pipe; 2. Connector; 3. Spray branch pipe; 4. Connecting pipe; 5. Distribution pipe; 6. Guide pipe; 7. Divider plate; 8. Collector pipe; 9. Swirl nozzle; 10. Rotary ring; 11. Drag-reducing ball bearing; 12. Connecting rod; 13. Stirring plate; 14. Spiral plate. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] This utility model provides, for example Figures 1-6 As shown, this utility model provides a raw material mixing device for methanol cracking, including a mixing pipe 1. A connector 2 is connected to the lower end of the mixing pipe 1. Multiple sets of nozzles are connected to the upper side of the cylindrical outer wall of the mixing pipe 1. Each set of nozzles is composed of multiple vertically distributed liquid spraying branches 3, which are arranged in a centrally symmetrical manner. Vertical connecting pipes 4 are connected to the outside of each set of nozzles. The opening directions of two adjacent connecting pipes 4 are opposite and they are arranged alternately. The upper ends of the multiple connecting pipes 4 with upward openings and the lower ends of the multiple connecting pipes 4 with downward openings are connected to distribution pipes 5. The right ends of the two distribution pipes 5 are connected to liquid guide pipes 6. During the methanol cracking reaction, the mixing pipe 1 is connected to the connecting pipe of the reaction chamber through the connector 2. Methanol liquid and catalyst liquid are introduced into the mixing pipe 1 through the two liquid guide pipes 6 for multi-stage mixing, thereby mixing the methanol liquid and catalyst liquid evenly and ensuring that the methanol liquid and catalyst liquid can react in time after arriving at the reaction chamber, thus improving the methanol cracking reaction efficiency.

[0036] In this process, methanol liquid and catalyst liquid are introduced into two distribution pipes 5 through two liquid guide pipes 6, and the two distribution pipes 5 are then introduced into multiple sets of nozzles through multiple connecting pipes 4, and sprayed into the upper part of the mixing pipe 1 through multiple liquid spraying branch pipes 3. Since the nozzle is composed of multiple liquid spraying branch pipes 3, and the opening directions of two adjacent connecting pipes 4 are opposite and alternately arranged, the methanol liquid and catalyst liquid can be alternately sprayed into the mixing pipe 1 in the circumferential direction, thereby performing primary mixing of methanol liquid and catalyst liquid.

[0037] Preferably, a partition plate 7 is connected to the upper side of the inner wall of the mixing pipe 1, and the partition plate 7 is located below the multiple injection branch pipes 3. A collection pipe 8 is connected to the center of the lower end of the partition plate 7. Multiple swirl nozzles 9 are connected to the outer tangential direction of the collection pipe 8, and the multiple swirl nozzles 9 are arranged in a centrally symmetrical manner. A limiting ring is provided on the outer side of the lower end of the collection pipe 8. When methanol liquid and catalyst liquid are sprayed into the space between the partition plate 7 and the limiting ring through the multiple swirl nozzles 9, since the swirl nozzles 9 are connected to the tangential direction of the outer wall of the collection pipe 8, the methanol liquid and catalyst liquid can form a swirling flow in the cavity between the partition plate 7 and the limiting ring under the spray of the multiple swirl nozzles 9, so that the methanol liquid and catalyst liquid can be mixed in a secondary manner in the cavity between the partition plate 7 and the limiting ring.

[0038] Preferably, a limiting ring is connected to the inner wall of the mixing tube 1. Two rotating rings 10 are rotatably connected between the limiting ring and the partition plate 7. The two rotating rings 10 are located on the upper and lower sides of the outside of the collecting tube 8, respectively. A ball groove is opened on the cylindrical outer wall of each of the two rotating rings 10. Multiple drag-reducing balls 11 are arranged inside each of the two ball grooves. Multiple connecting rods 12 are connected to the outer side of the two rotating rings 10. The multiple connecting rods 12 are located outside the collecting tube 8 and rotatably connected to the inside of the mixing tube 1. Multiple stirring plates 13 are connected to the end of each of the multiple connecting rods 12 near the collecting tube 8. Plate 13 is located outside the liquid collecting pipe 8. During the secondary mixing of methanol liquid and catalyst liquid, multiple stirring plates 13 rotate around the liquid collecting pipe 8 under the impact of methanol liquid and catalyst liquid sprayed from the swirl nozzle 9. They are limited by the rotating ring 10 and the connecting rod 12 to the mixing pipe 1 and the liquid collecting pipe 8. The rotating ring 10 can reduce the frictional resistance between itself and the inner wall of the mixing pipe 1 through multiple drag-reducing balls 11, so that the multiple rotating stirring plates 13 can turbulent and stir the swirling flow of methanol liquid and catalyst liquid, thereby improving the secondary mixing efficiency of methanol liquid and catalyst liquid.

[0039] Preferably, a spiral plate 14 is provided inside the lower end of the mixing tube 1, and the spiral plate 14 is located below the limiting ring. When the methanol liquid and the catalyst liquid flow through the inside of the limiting ring to the lower end of the mixing tube 1, the methanol liquid and the catalyst liquid can be mixed in three stages inside the mixing tube 1 by the guidance of the spiral plate 14. This can both increase the mixing path by the spiral plate 14 and allow the methanol liquid and the catalyst liquid to centrifugally rotate inside the mixing tube 1, thereby improving the three-stage mixing efficiency of the methanol liquid and the catalyst liquid.

[0040] 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 feedstock mixing device for methanol cracking, characterized in that, It includes a mixing tube (1), the lower end of which is connected to a connector (2). The upper side of the cylindrical outer wall of the mixing tube (1) is connected to multiple sets of spray pipes, and each set of spray pipes is composed of multiple vertically distributed spray branch pipes (3) and is arranged in a centrally symmetrical manner. Each set of spray pipes is connected to a vertical connecting pipe (4) on the outside. The opening directions of two adjacent connecting pipes (4) are opposite and are arranged alternately. The upper ends of the multiple connecting pipes (4) with openings facing upwards and the lower ends of the multiple connecting pipes (4) with openings facing downwards are connected to a distribution pipe (5). The right ends of the two distribution pipes (5) are connected to a liquid guide pipe (6).

2. The feedstock mixing device for methanol cracking as described in claim 1, characterized in that, The mixing pipe (1) has a partition plate (7) connected to the upper side of its inner wall, and the partition plate (7) is located below the multiple spray branch pipes (3).

3. The feedstock mixing device for methanol cracking as described in claim 2, characterized in that, The lower center of the partition plate (7) is connected to a liquid collection pipe (8), and multiple swirling nozzles (9) are connected to the outer tangential direction of the liquid collection pipe (8).

4. The feedstock mixing device for methanol cracking as described in claim 3, characterized in that, Multiple swirling nozzles (9) are arranged in a centrally symmetrical manner, and a limit ring is provided on the outer side of the lower end of the liquid collection pipe (8).

5. The feedstock mixing device for methanol cracking as described in claim 4, characterized in that, The limiting ring is connected to the inner wall of the mixing tube (1), and two rotating rings (10) are rotatably connected between the limiting ring and the partition plate (7).

6. The feedstock mixing device for methanol cracking as described in claim 5, characterized in that, The two rotating rings (10) are located on the upper and lower sides of the outside of the liquid collecting pipe (8), and ball grooves are provided on the outer cylindrical walls of the two rotating rings (10).

7. The feedstock mixing device for methanol cracking as described in claim 6, characterized in that, Multiple resistance-reducing balls (11) are provided inside both ball grooves, and multiple connecting rods (12) are connected to the outer side of the two rotating rings (10).

8. The feedstock mixing device for methanol cracking as described in claim 7, characterized in that, Multiple connecting rods (12) are located outside the liquid collection tube (8) and rotatably connected inside the mixing tube (1).

9. A feedstock mixing device for methanol cracking as described in claim 8, characterized in that, Each of the connecting rods (12) is connected to a stirring plate (13) near the end of the liquid collecting pipe (8), and the stirring plate (13) is located outside the liquid collecting pipe (8).

10. A feedstock mixing device for methanol cracking as described in claim 9, characterized in that, The mixing tube (1) has a spiral plate (14) inside its lower end, and the spiral plate (14) is located below the limiting ring.

Images