DMTO device reactor
By installing riser pipes and flushing components inside the fluidized bed reactor, the problem of catalyst residue affecting heat exchange was solved, achieving efficient cleaning of the reactor inner wall and heat exchange tubes and restoring heat exchange efficiency.
Patent Information
- Application Number
- CN202520569736.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-28
AI Technical Summary
Existing fluidized bed reactors are difficult to clean effectively after catalyst residue adsorption, which affects the heat exchange process.
A riser pipe and flushing assembly are installed inside the reactor body. The inner wall and heat exchange tubes are flushed efficiently through the box and nozzle system connected at the bottom of the riser pipe.
It enables convenient and effective cleaning of the reactor inner wall and heat exchange tubes, restoring heat exchange efficiency.
Smart Images
Figure CN223931369U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of methanol-to-olefins (MTO), and more specifically, to a DMTO reactor. Background Technology
[0002] DMTO is a methanol-to-olefins technology. Key equipment in the DMTO process includes a fluidized bed reactor, which is common in catalytic reactions. Fluidized bed reactors need to handle gas-solid two-phase flow at high temperatures. Methanol feed is converted into olefins under the action of a catalyst, and powdered catalyst needs to be continuously fed into the fluidized bed reactor to react with methanol. As a result, catalyst residues will be adsorbed on the outer wall of the heat exchange tubes and the inner wall of the fluidized bed reactor. The adsorption of catalyst residues on the heat exchange tubes will affect the heat exchange process. Existing fluidized bed reactors are not easy to clean inside. Therefore, we propose a DMTO reactor. Utility Model Content
[0003] To overcome the above shortcomings, this application provides a DMTO device reactor, which aims to improve the problem of inconvenient internal rinsing of fluidized bed reactors.
[0004] This application provides a DMTO device reactor, including a reactor body, a flow equalization plate and a heat exchange tube assembly installed inside the reactor body, a lifting pipe that slides through and seals the top of the reactor body, a flushing assembly connected to the bottom of the lifting pipe, and a discharge pipe connected to the side wall of the reactor body.
[0005] In one specific implementation, the flushing assembly includes a box body connected to the lifting pipe, a plurality of first water guide pipes are connected to the side wall of the box body, one end of each of the plurality of first water guide pipes is connected to a hollow block, and a plurality of first nozzles are connected to the side wall of the hollow block.
[0006] In one specific implementation, the flushing assembly further includes several second water guide pipes, one end of which is connected to the same annular pipe, and several second nozzles are connected to the outer wall of the annular pipe.
[0007] In one specific implementation, the heat exchange tube assembly includes a plurality of heat exchange tubes, all of which are arranged through the side wall of the reactor body, and the hollow block is located between two adjacent heat exchange tubes.
[0008] In one specific implementation, a connecting rod is fixedly installed on the top of the box body, a limiting block is fixedly installed at one end of the connecting rod, a limiting groove is opened on the inner wall of the reactor body, and the limiting block is slidably disposed in the limiting groove.
[0009] In one specific implementation, the heat exchange tube assembly further includes two gas supply pipes, with each end of the heat exchange tube connected to one of the two gas supply pipes.
[0010] In one specific implementation, the flow equalization plate includes a fixing plate, which is fixedly installed on the inner wall of the reactor body. The fixing plate is connected to a plurality of fixing pipes, and the side walls of the fixing pipes are connected to a plurality of air outlets.
[0011] In one specific implementation, a gas inlet pipe is connected to the side wall of the reactor body, and one end of the gas inlet pipe is connected to a gas outlet plate.
[0012] In one specific implementation, a support is installed at the bottom of the reactor body, and a drain pipe is also installed at the bottom of the reactor body.
[0013] In one specific implementation, a catalyst inlet pipe is connected to the side wall of the reactor body.
[0014] The beneficial effects of this application are as follows: by installing heat exchange tube assembly on the inner wall of the reactor body and sliding through the riser pipe at the top of the reactor body, with the bottom of the riser pipe connected to the flushing assembly, the flushing assembly can be moved from the top of the reactor body to the bottom of the reactor body through the riser pipe. During the descent, the flushing assembly can flush the inner wall of the reactor body, and the flushing water can be discharged from the drain pipe at the bottom of the reactor body, thereby facilitating the cleaning of the inner wall of the reactor body. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the main structure of the reactor in the DMTO apparatus provided in the embodiments of this application;
[0017] Figure 2 A front cross-sectional view of the reactor in the DMTO apparatus provided for an embodiment of this application;
[0018] Figure 3 A top cross-sectional view of the DMTO apparatus reactor provided for an embodiment of this application;
[0019] Figure 4 A schematic diagram of the internal structure of the reactor in the DMTO apparatus provided in this application embodiment;
[0020] Figure 5 A schematic cross-sectional view of the flow equalization plate of the DMTO device reactor provided in the embodiments of this application;
[0021] Figure 6 for Figure 2 A magnified view of a section at point A in the middle;
[0022] Figure 7 for Figure 3 A magnified view of a section at point B.
[0023] In the diagram: 10-Reactor body; 110-Limiting groove; 120-Gas inlet pipe; 130-Gas outlet plate; 20-Flow equalization plate; 210-Fixing plate; 220-Fixing pipe; 230-Gas outlet hole; 30-Heat exchange tube assembly; 310-Heat exchange tube; 320-Gas delivery pipe; 40-Rising pipe; 50-Flushing assembly; 510-Box body; 520-First water guide pipe; 530-Hollow block; 540-First nozzle; 550-Second water guide pipe; 560-Annular pipe; 570-Second nozzle; 60-Discharge pipe; 70-Connecting rod; 710-Limiting block. Detailed Implementation
[0024] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.
[0025] Please see Figure 1-7This application provides a DMTO (Methanol-to-Olefins) reactor, including a reactor body 10. A flow equalization plate 20 and a heat exchange tube assembly 30 are installed inside the reactor body 10. A riser pipe 40 is slidably and sealed through the top of the reactor body 10, and a flushing assembly 50 is connected to the bottom of the riser pipe 40. A discharge pipe 60 is connected to the side wall of the reactor body 10. Specifically, the DMTO unit is a methanol-to-olefins unit, requiring a fluidized bed reactor. Methanol is converted into olefins here. The gas-solid two-phase fluidization state promotes mass and heat transfer. Methanol enters the reactor body 10 and is evenly distributed within the reactor body 10 after passing through the flow equalization plate 20, allowing the methanol to react with the catalyst inside the reactor body 10 to convert into olefins. Simultaneously, the heat exchange tube assembly 30 is installed on the inner wall of the reactor body 10 and is connected to an existing external heat exchange device to achieve… The reaction temperature inside the reactor body 10 is controlled. When it is necessary to clean the inner wall of the reactor body 10 and the heat exchange tube assembly 30, the lifting pipe 40 is lowered, so that the flushing assembly 50 moves downward inside the reactor body 10 under its own gravity. The lifting pipe 40 is connected to the external traction equipment and the conveying device is connected to deliver cleaning liquid into the flushing assembly 50, thereby flushing the inner wall of the reactor body 10 and the heat exchange tube assembly 30. Furthermore, a support is installed at the bottom of the reactor body 10, and a drain pipe is also installed at the bottom of the reactor body 10. During installation, several mounting holes are opened on the support, so that the support can be installed on the base through the existing screw and nut mounting structure. The wastewater generated during cleaning can be discharged to the outside through the drain pipe at the bottom of the reactor body 10, and an existing valve can be installed on the drain pipe.
[0026] See Figure 2 The flushing assembly 50 includes a box 510 connected to the lifting pipe 40. Several first water guide pipes 520 are connected to the side wall of the box 510. One end of each of the first water guide pipes 520 is connected to a hollow block 530. Several first nozzles 540 are connected to the side wall of the hollow block 530. When set up, the several first nozzles 540 are evenly distributed on the side wall of the hollow block 530. The lifting pipe 40 is connected to the existing traction equipment and also to the existing infusion device to deliver cleaning fluid into the box 510. The cleaning fluid is delivered through the box 510 to the several first water guide pipes 520 and then flows into the hollow block 530, and is sprayed out from the several first nozzles 540 to flush the inside of the reactor body 10 and the heat exchange tube assembly 30.
[0027] See Figure 3The flushing assembly 50 also includes several second water guide pipes 550, one end of which is connected to the same annular pipe 560. Several second nozzles 570 are connected to the outer wall of the annular pipe 560. Specifically, the first nozzle 540 and the second nozzles 570 are used together to flush the heat exchange tube assembly 30 and the inner wall of the reactor body 10. It should be noted that the top of the reactor body 10 is open, and a sealing plate is installed on the opening. The sealing plate is connected to the top of the reactor body 10 by a bolt structure. When not in use, the flushing assembly 50 is located at the top of the reactor body 10.
[0028] See Figure 1-4 The heat exchange tube assembly 30 includes several heat exchange tubes 310, all of which penetrate the side wall of the reactor body 10. A hollow block 530 is located between two adjacent heat exchange tubes 310. When the assembly is set up, several first nozzles 540 and several second nozzles 570 spray cleaning liquid, so that the cleaning liquid can wash the outer wall of the heat exchange tubes 310 and the inner wall of the reactor body 10, thereby re-cleaning the heat exchange tubes 310 and the inner wall of the reactor body 10.
[0029] See Figure 2 , 6 7. A connecting rod 70 is fixedly installed on the top of the box body 510. A limiting block 710 is fixedly installed on one end of the connecting rod 70. A limiting groove 110 is opened on the inner wall of the reactor body 10. The limiting block 710 is slidably disposed in the limiting groove 110. It should be noted that when the flushing component 50 moves downward, the limiting block 710 is driven by the connecting rod 70 to slide downward in the limiting groove 110, so as to limit the several first water guide pipes 520 and several second water guide pipes 550.
[0030] See Figure 4 The heat exchange tube assembly 30 also includes two gas supply pipes 320. The two ends of the heat exchange tube 310 are respectively connected to the two gas supply pipes 320. Specifically, the two gas supply pipes 320 are connected to the existing external heat exchange device.
[0031] See Figure 4 and 5The flow equalization plate 20 includes a fixing plate 210, which is fixedly installed on the inner wall of the reactor body 10. Several fixing pipes 220 are connected to the fixing plate 210, and several gas outlet holes 230 are connected to the side walls of the fixing pipes 220. A gas phase inlet pipe 120 is connected to the side wall of the reactor body 10, and one end of the gas phase inlet pipe 120 is connected to a gas outlet plate 130. A catalyst inlet pipe is also connected to the side wall of the reactor body 10. During setup, vaporized methanol passes through the gas phase... The inlet pipe 120 enters the outlet plate 130, which in turn causes methanol to be sprayed into the reactor body 10. The vaporized methanol is diverted into several fixed pipes 220, and then blown upward through several outlet holes 230 so that the methanol can react with the catalyst. It should be noted that the outlet plate 130 is hollow inside, and several through holes are opened at the bottom of the outlet plate 130. Several through holes are connected to the inside of the outlet plate 130, and the gas phase inlet pipe 120 is connected to the inside of the outlet plate 130.
[0032] During operation, the DMTO reactor works as follows: vaporized methanol enters the outlet plate 130 through the gas inlet pipe 120, and then enters the reactor body 10. The methanol is evenly distributed into the reactor body 10 through the flow equalization plate 20, and then reacts with the catalyst inside the reactor body 10. The product after the reaction is discharged through the discharge pipe 60. When cleaning the inner wall of the reactor body 10 and the heat exchange tube 310, cleaning liquid is transported into the riser pipe 40. At the same time, the box 510 moves downward under the riser pipe 40, and the rinsing liquid in the box 510 flows through several first water guide pipes 520 and several second water guide pipes 550 to several hollow blocks 530 and annular pipes 560, and finally sprays out from several first nozzles 540 and several second nozzles 570 to clean the inner wall of the reactor body 10 and the outer wall of the heat exchange tube 310. The rinsing liquid flows downward through the flow equalization plate 20 and is then discharged from the drain pipe.
[0033] It should be noted that the specific model and specifications of the reactor body 10 need to be selected and determined according to the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.
[0034] The power supply and principle of the reactor body 10 are clear to those skilled in the art and will not be described in detail here.
[0035] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
Claims
1. A DMTO reactor, characterized in that, The reactor body (10) includes a flow equalization plate (20) and a heat exchange tube assembly (30) installed inside the reactor body (10). A lifting pipe (40) is slidably sealed through the top of the reactor body (10). A flushing assembly (50) is connected to the bottom of the lifting pipe (40). A discharge pipe (60) is connected to the side wall of the reactor body (10).
2. The DMTO reactor according to claim 1, characterized in that, The flushing assembly (50) includes a box (510) connected to the lifting pipe (40). A plurality of first water guide pipes (520) are connected to the side wall of the box (510). One end of each of the plurality of first water guide pipes (520) is connected to a hollow block (530). A plurality of first nozzles (540) are connected to the side wall of the hollow block (530).
3. A DMTO reactor according to claim 2, characterized in that, The flushing assembly (50) also includes several second water guide pipes (550), one end of each of the several second water guide pipes (550) is connected to the same annular pipe (560), and several second nozzles (570) are connected to the outer wall of the annular pipe (560).
4. A DMTO reactor according to claim 2, characterized in that, The heat exchange tube assembly (30) includes several heat exchange tubes (310), all of which are arranged through the side wall of the reactor body (10), and the hollow block (530) is located between two adjacent heat exchange tubes (310).
5. A DMTO reactor according to claim 2, characterized in that, A connecting rod (70) is fixedly installed on the top of the box body (510), and a limiting block (710) is fixedly installed at one end of the connecting rod (70). A limiting groove (110) is opened on the inner wall of the reactor body (10), and the limiting block (710) is slidably disposed in the limiting groove (110).
6. A DMTO reactor according to claim 4, characterized in that, The heat exchange tube assembly (30) also includes two gas supply pipes (320), and the two ends of the heat exchange tube (310) are respectively connected to the two gas supply pipes (320).
7. A DMTO reactor according to claim 1, characterized in that, The flow equalization plate (20) includes a fixing plate (210), which is fixedly installed on the inner wall of the reactor body (10). A plurality of fixing pipes (220) are connected to the fixing plate (210), and a plurality of air outlets (230) are connected to the side wall of the fixing pipes (220).
8. A DMTO reactor according to claim 1, characterized in that, A gas inlet pipe (120) is connected to the side wall of the reactor body (10), and one end of the gas inlet pipe (120) is connected to an outlet plate (130).
9. A DMTO reactor according to claim 1, characterized in that, A support is installed at the bottom of the reactor body (10), and a drain pipe is also installed at the bottom of the reactor body (10).
10. A DMTO reactor according to claim 1, characterized in that, The reactor body (10) has a catalyst inlet pipe connected to its side wall.