DMTO reaction C4 recycling device

Abstract

The utility model is suitable for the technical field of recycling devices, and provides a DMTO reaction C recycling device which comprises a base, the reactor and the cracking reaction box are fixed to the top of the base through bolts, and the reactor is located on one side of the cracking reaction box; the DMTO reaction cylinder is fixed at the central position of the top of the reactor through a bolt; the methanol feeding pipe is embedded and fixed at the top of the DMTO reaction cylinder; the molecular sieve pore channel is formed in the inner side wall of the DMTO reaction cylinder; the electric push rod is fixed on the outer wall of one side, far away from the reactor, of the cracking reaction box through a bolt; the byproduct mixed C4 is contacted with the regenerated catalyst for cracking reaction, so that the yield of ethylene and propylene can be increased, the induction period of converting the raw material methanol into ethylene and propylene can be eliminated, the generation of coke is reduced, and meanwhile, the cracking reaction of the mixed C4 is an endothermic reaction, so that the temperature of the regenerated catalyst returned to a reactor can be reduced, and the yield of the regenerated catalyst is improved. The side reaction of high-temperature catalysis is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of recycling devices, in particular to a DMTO reaction C4 recycling device. Background Art

[0002] Ethylene and propylene are two of the most produced and consumed basic chemicals globally. In recent years, with the increasing depletion of petroleum resources, MTO (MTO) technology, which uses coal or natural gas as feedstock to produce ethylene and propylene via methanol or dimethyl ether, has attracted widespread attention.

[0003] However, there is an induction period in the early stage of the DMTO reaction. Methanol first forms active hydrocarbon pool species in the molecular sieve pores, and then proceeds to the next step of reaction, causing part of the methanol to generate coke, resulting in increased methanol unit consumption. Moreover, in addition to producing ethylene and propylene, DMTO technology also produces by-products such as mixed carbon four (carbon four, i.e. C4), which is difficult to effectively utilize.

[0004] Therefore, a DMTO reaction C4 recycling device is proposed. Utility Model Content

[0005] The utility model provides a DMTO reaction C4 recycling device, aiming to solve the above problems.

[0006] The utility model is implemented as follows: a DMTO reaction C recycling device comprises: a base; a reactor and a cracking reaction box fixed to the top of the base by bolts, the reactor being located on one side of the cracking reaction box; a DMTO reaction cylinder fixed to the center of the top of the reactor by bolts; a methanol feed pipe embedded and fixed to the top of the DMTO reaction cylinder; and a molecular sieve channel provided on the inner wall of the DMTO reaction cylinder; an electric push rod fixed to the outer wall of the cracking reaction box away from the reactor by bolts; a first sealing baffle fixed to the output end of the electric push rod; a regenerated catalyst storage cover welded to the outer wall of the first sealing baffle; and a regenerated catalyst storage cover welded to the outer wall of the regenerated catalyst storage cover away from the first sealing baffle. a second sealing baffle; a regenerated catalyst provided inside the regenerated catalyst storage cover; a through groove at the bottom end of the outer wall of one side of the reactor and the cracking reaction box; a groove on the inner wall of one side of the reactor and the cracking reaction box; a fixing plate fixed to the bottom of the cracking reaction box by bolts; a C4 vaporizer fixed to the top of the fixing plate by bolts; a first C4 feed pipe and a second C4 feed pipe embedded in and fixed to the top of the C4 vaporizer, the first C4 feed pipe being located on one side of the second C4 feed pipe; an air pump fixed to the outer wall of the C4 vaporizer by bolts; a connecting pipe fixed between the air pump input end and the outer wall of the C4 vaporizer; and a regeneration delivery pipe fixed between the air pump output end and the top of the cracking reaction box.

[0007] Preferably, the cracking reaction box and the reactor are precisely docked, and the through grooves on the cracking reaction box and the reactor are connected.

[0008] Preferably, the first sealing baffle and the second sealing baffle are matched with the two grooves respectively.

[0009] Preferably, the cross-sectional area of ​​the first sealing baffle and the second sealing baffle are both larger than the cross-sectional area of ​​the through groove.

[0010] Preferably, the first C4 feed pipe is injected with purchased mixed C4, and the second C4 feed pipe is injected with self-produced mixed C4.

[0011] Preferably, the C4 vaporizer is communicated with the connecting pipe, and the regeneration delivery pipe is communicated with the C4 vaporizer.

[0012] Preferably, there are two electric push rods, and the two electric push rods are symmetrically arranged on the outer side wall of the cracking reaction box.

[0013] Preferably, a stop valve is fixedly connected to one side outer wall of the cracking reaction box by bolts.

[0014] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0015] By bringing the mixed C4 by-product into contact with the regenerated catalyst for cracking reaction, not only can the yield of ethylene and propylene be improved, but also the induction period of converting the raw material methanol into ethylene and propylene can be eliminated, and the formation of coke can be reduced. At the same time, the mixed C4 cracking reaction is an endothermic reaction, which can reduce the temperature of the regenerated catalyst returning to the reactor, avoid the occurrence of high-temperature catalytic side reactions, and improve the economic benefits of the enterprise. By switching the regenerated catalyst between the reactor and the cracking reaction box, the regenerated catalyst can react with methanol and the regenerated catalyst can react. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the reactor and cracking reaction box of the utility model.

[0018] Figure 3 This is a schematic structural diagram of the C4 carburetor of the present utility model;

[0019] Figure 4 It is a schematic diagram of the internal structure of the DMTO reaction tube of the present utility model.

[0020] In the figure: 1. base; 2. reactor; 3. cracking reaction box; 4. DMTO reaction cylinder; 5. methanol feed pipe; 6. molecular sieve channel; 7. electric push rod; 8. first sealing baffle; 9. regeneration catalyst storage cover; 10. second sealing baffle; 11. regeneration catalyst; 12. through groove; 13. groove; 14. fixing plate; 15. C4 vaporizer; 16. first C4 feed pipe; 17. second C4 feed pipe; 18. air pump; 19. regeneration delivery pipe; 20. connecting pipe. DETAILED DESCRIPTION

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0022] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] The present invention provides a DMTO reaction C4 recycling device, such as Figure 1-4As shown, it includes a base 1, the top of the base 1 is fixedly connected to a reactor 2 and a cracking reaction box 3 by bolts, the reactor 2 is located on one side of the cracking reaction box 3, and a stop valve is fixedly connected to one side of the outer wall of the cracking reaction box 3 by bolts. A DMTO reaction cylinder 4 is fixedly connected to the center of the top of the reactor 2 by bolts, a methanol feed pipe 5 is embedded and fixed on the top of the DMTO reaction cylinder 4, and a molecular sieve channel 6 is provided on the inner side wall of the DMTO reaction cylinder 4, an electric push rod 7 is fixedly connected to the outer wall of the cracking reaction box 3 away from the reactor 2 by bolts, there are two electric push rods 7, and the two electric push rods 7 are symmetrically arranged on the outer side wall of the cracking reaction box 3, the electric push rod 7 is fixedly connected to a first sealing baffle 8 through the output end of one side thereof, a regenerated catalyst storage cover 9 is fixedly connected to the outer wall of the first sealing baffle 8 away from the output end of the electric push rod 7 by bolts, a second sealing baffle 10 is fixedly connected to the outer wall of the regenerated catalyst storage cover 9 away from the first sealing baffle 8 by bolts, and the inner side wall of the regenerated catalyst storage cover 9 is fixedly connected to the second sealing baffle 10 The reactor 2 and the cracking reaction box 3 are provided with a regeneration catalyst 11, and a through groove 12 is provided on the outer wall of the side facing each other, and a groove 13 is provided on the inner wall of the reactor 2 and the cracking reaction box 3. The top of the cracking reaction box 3 is fixedly connected with a fixing plate 14 by bolts, and the top of the fixing plate 14 is fixedly connected with a C4 vaporizer 15 by bolts. The top of the C4 vaporizer 15 is embedded with a first C4 feed pipe 16 and a second C4 feed pipe 17. The interior of the first C4 feed pipe 16 is injected with purchased mixed C4, and the second C4 feed pipe 17 is embedded with a first C4 feed pipe 16 and a second C4 feed pipe 17. The interior of the C4 feed pipe 17 is injected with self-produced mixed C4, the first C4 feed pipe 16 is located on one side of the second C4 feed pipe 17, and an air pump 18 is fixedly connected to the outer wall of one side of the C4 vaporizer 15 by bolts. A regeneration delivery pipe 19 is fixedly connected between the output end of the air pump 18 and the cracking reaction box 3 by bolts, and a connecting pipe 20 is fixedly connected between the input end of the air pump 18 and the C4 vaporizer 15 by bolts. The C4 vaporizer 15 and the connecting pipe 20 are connected, and the regeneration delivery pipe 19 and the C4 vaporizer 15 are connected.

[0024] It should be noted that, due to the induction period in the initial stage of the existing DMTO reaction, methanol first forms active hydrocarbon pool species in the molecular sieve pores, and then proceeds to the next step of reaction, resulting in part of the methanol generating coke, causing an increase in methanol unit consumption. Moreover, in addition to generating ethylene and propylene, DMTO technology also produces by-products such as mixed carbon four, which are difficult to effectively utilize. This embodiment can not only improve the yield of ethylene and propylene by contacting the by-product mixed carbon four with the regenerated catalyst 11 for cracking reaction, but also eliminate the induction period of converting the raw material methanol into ethylene and propylene, and reduce the formation of coke. At the same time, the mixed carbon four cracking reaction is an endothermic reaction, which can reduce the temperature of the regenerated catalyst 11 returning to the reactor 2, avoid the occurrence of high-temperature catalytic side reactions, and improve the economic benefits of the enterprise. By switching the regenerated catalyst 11 between the reactor 2 and the cracking reaction box 3, the regenerated catalyst 11 and methanol and the regenerated catalyst 11 can react.

[0025] Specifically, in this embodiment, this scheme mainly includes a reactor 2, a cracking reaction box 3 and a C4 vaporizer 15. When C4 recycling is carried out, the purchased mixed C4 is injected into the C4 vaporizer 15 through the first C4 feed pipe 16, and the self-produced mixed C4 is injected into the C4 vaporizer 15 through the first C4 feed pipe 16. The C4 vaporizer 15 gasifies the C4. Under the transportation of the air pump 18, the gasified C4 passes through the connecting pipe 20 and the regeneration delivery pipe 19 in turn and enters the cracking reaction box 3. The C4 contacts the regenerated catalyst 11 in the regenerated catalyst storage cover 9 and then undergoes a cracking reaction, which can not only improve the yield of ethylene and propylene, but also eliminate the induction period of converting the raw material methanol into ethylene and propylene, reducing coke. The production of carbon, at the same time, the mixed carbon four cracking reaction is an endothermic reaction, which can reduce the temperature of the regenerated catalyst 11 returning to the reactor 2, avoid the occurrence of high-temperature catalytic side reactions, and improve the economic benefits of the enterprise. After the cracking reaction is completed, the electric push rod 7 is controlled to drive the first sealing baffle 8 to move through the output end on one side thereof, and the first sealing baffle 8, the regenerated catalyst storage cover 9 and the second sealing baffle 10 move synchronously. The second sealing baffle 10 is embedded in the groove 13, and the regenerated catalyst storage cover 9 enters the reactor 2. Methanol enters the DMTO reaction cylinder 4 through the methanol feed pipe 5. Methanol first forms active hydrocarbon pool species in the molecular sieve channel 6, and then enters the reactor 2 to further react with the regenerated catalyst 11.

[0026] In a further preferred embodiment of the present invention, Figure 1-2 As shown, the cracking reaction box 3 and the reactor 2 are precisely docked, and the cracking reaction box 3 and the through groove 12 on the reactor 2 are connected.

[0027] In this embodiment, the sealing is ensured by precise docking, and the connected through slots 12 are used to enable the regenerated catalyst storage cover 9 to move between the reactor 2 and the cracking reaction box 3, thereby realizing the cracking reaction of the regenerated catalyst 11 and the mixed C4.

[0028] In a further preferred embodiment of the present invention, Figure 2 As shown, the first sealing baffle 8 and the second sealing baffle 10 are matched with the two grooves 13 respectively, and the cross-sectional area of ​​the first sealing baffle 8 and the second sealing baffle 10 are both larger than the cross-sectional area of ​​the through groove 12.

[0029] In this embodiment, the first sealing baffle 8 and the second sealing baffle 10 can be respectively embedded in the two grooves 13, thereby ensuring the stable reciprocating movement of the regenerated catalyst storage cover 9 between the reactor 2 and the cracking reaction box 3, and utilizing the limiting function of the first sealing baffle 8 and the second sealing baffle 10 to ensure the sealing of the regenerated catalyst storage cover 9 after it is moved into place.

[0030] It should be noted that for the aforementioned embodiments, for simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should be aware that the present invention is not limited by the order of the actions described, because according to the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0031] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative, such as the division of the above-mentioned units. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the coupling or communication connection between each other shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0032] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope to be protected by the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making any creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also fall within the scope to be protected by the present invention.

Claims

1. A DMTO reaction C4 recycling device, characterized in that: include: Base (1); A reactor (2) and a cracking reaction box (3) are fixed to the top of the base (1) by bolts, wherein the reactor (2) is located on one side of the cracking reaction box (3); A DMTO reaction cylinder (4) fixed to the center of the top of the reactor (2) by bolts; A methanol feed pipe (5) is embedded and fixed on the top of the DMTO reaction cylinder (4); and A molecular sieve channel (6) provided on the inner side wall of the DMTO reaction cylinder (4); An electric push rod (7) fixed to the outer wall of the cracking reaction box (3) on a side away from the reactor (2) by means of bolts; a first sealing baffle (8) fixed to the output end of the electric push rod (7); a regenerated catalyst storage cover (9) welded to the outer side wall of the first sealing baffle (8); a second sealing baffle (10) welded to the outer wall of the regenerated catalyst storage cover (9) on a side away from the first sealing baffle (8); a regenerated catalyst (11) disposed inside the regenerated catalyst storage cover (9); The bottom through grooves (12) are both provided on the outer wall of one side of the reactor (2) and the cracking reaction box (3); Grooves (13) are both provided on the inner wall of one side of the reactor (2) and the cracking reaction box (3); A fixing plate (14) fixed to the bottom of the cracking reaction box (3) by bolts; a C4 carburetor (15) fixed to the top of the fixing plate (14) by bolts; A first C4 feed pipe (16) and a second C4 feed pipe (17) are embedded and fixed on the top of the C4 vaporizer (15), wherein the first C4 feed pipe (16) is located on one side of the second C4 feed pipe (17); An air pump (18) fixed to the outer side wall of the C4 carburetor (15) by bolts; a connecting pipe (20) fixed between the input end of the air pump (18) and the outer side wall of the C4 vaporizer (15); and A regeneration delivery pipe (19) is fixed between the output end of the air pump (18) and the top of the cracking reaction box (3).

2. A DMTO reaction C4 recycling device according to claim 1, characterized in that: The cracking reaction box (3) and the reactor (2) are precisely docked, and the cracking reaction box (3) and the through groove (12) on the reactor (2) are connected.

3. A DMTO reaction C4 recycling device according to claim 1, characterized in that: The first sealing baffle (8) and the second sealing baffle (10) are respectively matched with the two grooves (13).

4. A DMTO reaction C4 recycling device according to claim 1, characterized in that: The cross-sectional areas of the first sealing baffle (8) and the second sealing baffle (10) are both larger than the cross-sectional area of ​​the through groove (12).

5. A DMTO reaction C4 recycling device according to claim 1, characterized in that: The C4 vaporizer (15) is communicated with the connecting pipe (20), and the regeneration delivery pipe (19) is communicated with the C4 vaporizer (15).

6. A DMTO reaction C4 recycling device according to claim 1, characterized in that: There are two electric push rods (7) in total, and the two electric push rods (7) are symmetrically arranged on the outer side wall of the cracking reaction box (3).

7. A DMTO reaction C4 recycling device according to claim 1, characterized in that: A stop valve is fixedly connected to one outer wall of the cracking reaction box (3) via bolts.

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