Device for improving carbon pre-deposition of methanol-to-olefin catalyst
By accurately controlling the flow rate and proportion of mixed carbon 4 and steam, combined with control valves and temperature sensors, the pre-carbon deposit effect of methanol-to-olefin catalyst is improved, the problems of low catalyst activity and product yield are solved, and efficient catalyst regeneration and stable operation are achieved.
Patent Information
- Application Number
- CN202422252888.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-14
AI Technical Summary
In the existing methanol-to-olefin process, the catalyst has low pre-carbon deposit effect, resulting in low raw material conversion and product yield, and it is necessary to improve the product generation efficiency when the catalyst comes into contact with methanol gas.
By setting up multiple control valves, temperature sensors and flowmeters, the flow rate and proportion of mixed carbon quad and steam are accurately controlled, and combined with the catalyst output pipeline and regenerator, the catalyst is efficiently pre-carbonized, and the catalyst activity and service life are improved.
The pre-carbon deposit amount of the catalyst is increased, the activity and service life of the catalyst is enhanced, the product yield and production efficiency are improved, and the operating stability and safety of the system are enhanced.
Smart Images
Figure CN223082749U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of chemical production, in particular to a device for improving the pre-carbon deposition of methanol-to-olefin catalysts. Background Art
[0002] When the catalyst in the DMTO device contacts with methanol gas to participate in the reaction, the catalyst cokes to generate carbon deposition, and the carbon deposition is beneficial to the methanol-to-olefin reaction. In actual production, in order to save the catalyst cost, the recycled catalyst is regenerated after being incompletely burned in the regenerator, and the regenerated catalyst is mixed with carbon four through the regeneration transfer pipe and transported to the reactor for continuous reaction. However, the pre-carbon deposition effect of the regenerated catalyst in the existing methanol-to-olefin process is low, and the raw material conversion rate and product yield are low.
[0003] Therefore, there is an urgent need for a device for improving the pre-carbon deposition of methanol-to-olefin catalysts to ensure that when methanol gas contacts with the catalyst, product gas is generated, so as to achieve the purpose of improving the product yield and improving the production efficiency. Summary of the Invention
[0004] A device for improving the pre-carbon deposition of methanol-to-olefin catalysts can ensure that when methanol gas contacts with the catalyst, product gas is generated, so as to achieve the purpose of improving the product yield and improving the production efficiency.
[0005] A device for improving the pre-carbon deposition of methanol-to-olefin catalysts includes a first mixed carbon four output port, an etherified carbon four output port and a steam output port, wherein:
[0006] One side of the first mixed carbon four output port is connected to a first mixed carbon four pipeline, the other end of the first mixed carbon four pipeline is connected to a carbon four vaporizer, the top of the carbon four vaporizer is provided with a carbon four vaporization pipeline, and one end of the carbon four vaporization pipeline is connected to a steam transmission pipeline;
[0007] One end of the etherified carbon four output port is connected to an etherified carbon four pipeline, the other end of the etherified carbon four pipeline is connected to a second mixed carbon four pipeline, a mixed medium transmission pipeline is provided at the connection of the etherified carbon four pipeline and the second mixed carbon four pipeline, the other end of the mixed medium transmission pipeline is communicated with the first mixed carbon four pipeline, and the other end of the second mixed carbon four pipeline is connected to a second mixed carbon four output port;
[0008] One end of the steam output port is connected to the steam transmission pipeline, the other end of the steam transmission pipeline is connected to a regeneration transmission pipeline, one place of the regeneration transmission pipeline is communicated with a catalyst output pipeline, and the other end of the catalyst output pipeline is connected to a regenerator;
[0009] The other end of the regeneration transmission pipeline is connected to a reactor.
[0010] Preferably, a three-way valve is provided at the connection of the etherified carbon four pipeline, the mixed medium transmission pipeline and the second mixed carbon four pipeline.
[0011] Preferably, a flowmeter is provided on the C4 pipeline after etherification.
[0012] Preferably, the catalyst output pipeline is connected to a catalyst device.
[0013] Preferably, a number of control valves are provided on both the first mixed C4 pipeline and the steam delivery pipeline.
[0014] Preferably, temperature sensors are provided on the first mixed C4 pipeline and the steam delivery pipeline.
[0015] Preferably, a filtration system is provided on the mixed medium delivery pipeline.
[0016] Advantages of the present utility model: The present utility model is a device for pre-carbon deposition of a methanol-to-olefins catalyst. By precisely controlling the flow rate and ratio of mixed C4 and steam, the device can effectively increase the pre-carbon deposition amount of the catalyst, thereby improving the activity and service life of the catalyst. Multiple control valves, temperature sensors, and flowmeters are provided in the device, enabling real-time monitoring and adjustment during system operation, thus improving the operational stability and safety. The setting of the regeneration delivery pipeline and the catalyst device helps the efficient regeneration of the catalyst and reduces catalyst loss. The configuration of the three-way valve and the filtration system on the mixed medium delivery pipeline provides flexible operation options and protection functions, improving the system's adaptability and maintainability, and greatly enhancing its practical value. Description of the Drawings
[0017] Figure 1 Schematic diagram of a device for pre-carbon deposition of a methanol-to-olefins catalyst according to the present utility model.
[0018] In the figure: the first mixed C4 output port 1, the first mixed C4 pipeline 2, the C4 vaporizer 3, the C4 vaporization pipeline 4, the steam delivery pipeline 5, the C4 output port after etherification 6, the C4 pipeline after etherification 7, the mixed medium delivery pipeline 8, the steam output port 9, the regeneration delivery pipeline 10, the catalyst output pipeline 11, the regenerator 12, the reactor 13, the three-way valve 14, the catalyst device 15, the second mixed C4 pipeline 16, the second mixed C4 output port 17. Detailed Embodiments
[0019] To make the technical solution of the present utility model easier to understand, the technical solution of the present utility model will be clearly and completely described below by way of specific embodiments in conjunction with the drawings.
[0020] Embodiment 1:
[0021] As Figure 1 shown, in this embodiment Figure 1The present utility model relates to a device for pre-coking a methanol-to-olefins catalyst, including a first mixed C4 output port 1, a C4 after ether output port 6, and a steam output port 9, where:
[0022] One side of the first mixed C4 output port 1 is connected to a first mixed C4 pipeline 2, the other end of the first mixed C4 pipeline 2 is connected to a C4 vaporizer 3, the top of the C4 vaporizer 3 is provided with a C4 vaporization pipeline 4, and one end of the C4 vaporization pipeline 4 is connected to a steam transmission pipeline 5;
[0023] One end of the C4 after ether output port 6 is connected to a C4 after ether pipeline 7, the other end of the C4 after ether pipeline 7 is connected to a second mixed C4 pipeline 16, a mixed medium transmission pipeline 8 is provided at the connection between the C4 after ether pipeline 7 and the second mixed C4 pipeline 16, the other end of the mixed medium transmission pipeline 8 is communicated with the first mixed C4 pipeline 2, and the other end of the second mixed C4 pipeline 16 is connected to a second mixed C4 output port 17;
[0024] One end of the steam output port 9 is connected to the steam transmission pipeline 5, and the other end of the steam transmission pipeline 5 is connected to a regeneration transmission pipeline 10. One place of the regeneration transmission pipeline 10 is communicated with a catalyst output pipeline 11, and the other end of the catalyst output pipeline 11 is connected to a regenerator 12;
[0025] The other end of the regeneration transmission pipeline 10 is connected to a reactor 13.
[0026] A three-way valve 14 is provided at the connection of the C4 after ether pipeline 7, the mixed medium transmission pipeline 8, and the second mixed C4 pipeline 16.
[0027] A flowmeter is provided on the C4 after ether pipeline 7.
[0028] The catalyst output pipeline 11 is connected to a catalyst device 15.
[0029] A number of control valves are provided on both the first mixed C4 pipeline 2 and the steam transmission pipeline 5.
[0030] Temperature sensors are provided on the first mixed C4 pipeline 2 and the steam transmission pipeline 5.
[0031] A filtration system is provided on the mixed medium transmission pipeline 8.
[0032] During the use of this device, the first mixed C4 outlet 1 outputs mixed C4, which enters the C4 vaporizer 3 through the first mixed C4 pipeline 2. At this time, according to the reaction mode inside the gas, either the C4 after ether outlet 6 or the second mixed C pipeline 16 is selected to be opened and introduced into the mixed medium delivery pipeline 8 for further mixing. The resulting pre-carbon deposited gas is mixed from the C4 vaporization pipeline 4 and the steam delivery pipeline 5, enters the regeneration delivery pipeline 10, and the gas in the regenerator 12 enters the catalyst output pipeline 11 through the catalyst device 15, mixes with the pre-carbon deposited gas and steam, and then enters the reactor 13 through the regeneration delivery pipeline 10 for reaction.
[0033] The C4 after ether pipeline 7 is used to transport the catalyst. Through the process of transporting the catalyst in the C4 after ether pipeline 7, the pre-carbon deposition of the incompletely regenerated catalyst is carried out to increase the carbon content of the catalyst entering the reactor 13, so that the pore size of the catalyst is concentrated in a certain specific range, ensuring that when methanol gas contacts the catalyst, ethylene and propylene are generated, achieving the purpose of increasing the product yield.
[0034] The three-way valve 14 is arranged on the mixed medium delivery pipeline 8, used to control the connection between the C4 after ether outlet 6 or the second mixed C pipeline 16 and the mixed medium delivery pipeline 8, and adjust the gas flow rate to achieve precise control of the mixed medium.
[0035] The flowmeter is installed on the C4 after ether pipeline 7, used to monitor and control the flow rate of C4 after ether in real time.
[0036] The catalyst device 15 is arranged on the catalyst output pipeline 11, used to process and maintain the catalyst and prevent gas backflow.
[0037] A plurality of control valves are arranged on the first mixed C4 pipeline 2 and the steam delivery pipeline, used to precisely adjust the flow rate of the fluid.
[0038] The temperature sensors are installed on the first mixed C4 pipeline 2 and the steam delivery pipeline 5, used to monitor and control the temperature inside the pipeline.
[0039] The filtration system is arranged on the mixed medium delivery pipeline 8, used to remove impurities and ensure the purity of the medium. The utility model can effectively improve the efficiency and accuracy of catalyst pre-carbon deposition by precisely controlling the flow rate and temperature and equipping with a monitoring and control system.
[0040] It should be noted that the embodiments described herein are only partial embodiments of the present utility model, rather than all implementation manners of the present utility model. The embodiments are only exemplary, and their function is only to provide a more intuitive and clear way to understand the content of the present utility model, rather than a limitation on the technical solutions described in the present utility model. Without departing from the concept of the present utility model, all other implementation manners that can be thought of by those of ordinary skill in the art without creative efforts, as well as other simple substitutions and various changes to the technical solutions of the present utility model, all fall within the protection scope of the present utility model.
Claims
1. An apparatus for pre-coking a methanol-to-olefins catalyst, characterized in that, It includes a first mixed C4 outlet (1), a C4 after ether outlet (6) and a steam outlet (9), wherein: One side of the first mixed C4 outlet (1) is connected to a first mixed C4 pipeline (2), the other end of the first mixed C4 pipeline (2) is connected to a C4 vaporizer (3), the top of the C4 vaporizer (3) is provided with a C4 vaporization pipeline (4), and one end of the C4 vaporization pipeline (4) is connected to a steam transmission pipeline (5); One end of the C4 after ether outlet (6) is connected to a C4 after ether pipeline (7), the other end of the C4 after ether pipeline (7) is connected to a second mixed C4 pipeline (16), a mixed medium transmission pipeline (8) is provided at the connection of the C4 after ether pipeline (7) and the second mixed C4 pipeline (16), the other end of the mixed medium transmission pipeline (8) is communicated with the first mixed C4 pipeline (2), and the other end of the second mixed C4 pipeline (16) is connected to a second mixed C4 outlet (17); One end of the steam outlet (9) is connected to the steam transmission pipeline (5), the other end of the steam transmission pipeline (5) is connected to a regeneration transmission pipeline (10), a catalyst output pipeline (11) is communicated with the regeneration transmission pipeline (10) at one place, and the other end of the catalyst output pipeline (11) is connected to a regenerator (12); The other end of the regeneration transmission pipeline (10) is connected to a reactor (13).
2. The pre-carbon deposition device for a methanol-to-olefins catalyst according to claim 1, characterized in that A three-way valve (14) is provided at the connection of the C4 after ether pipeline (7), the mixed medium transmission pipeline (8) and the second mixed C4 pipeline (16).
3. The pre-carbon deposition device for a methanol - to - olefins catalyst according to claim 1, characterized in that, A flowmeter is provided on the C4 after ether pipeline (7).
4. The pre-carbon deposition device for the methanol-to-olefins catalyst according to claim 1, characterized in that, The catalyst output pipeline (11) is connected to a catalyst device (15).
5. The pre-carbon deposition device for a methanol-to-olefins catalyst according to claim 1, characterized in that, A number of control valves are provided on both the first mixed C4 pipeline (2) and the steam transmission pipeline (5).
6. The pre-carbon deposition device for a methanol-to-olefins catalyst as described in claim 1, characterized in that, Temperature sensors are provided on the first mixed C4 pipeline (2) and the steam transmission pipeline (5).
7. The pre-carbon deposition device for a methanol-to-olefins catalyst as described in claim 1, wherein, A filtration system is provided on the mixed medium transmission pipeline (8).