Load reduction device of methanol separation tower

Abstract

The utility model relates to a load reducing device for a methanol separating tower, which comprises a main pipe connected with a reflux tank and the methanol separating tower, a branch pipe is further connected onto the main pipe, and the other end of the branch pipe is connected with a feed port of a raw material reaction tower. When the device is used, a part of methanol and a part of steam of dimethyl carbonate are conveyed into the raw material reaction tower, so that the amount of methanol entering the methanol separation tower is reduced, the load of the methanol separation tower is reduced, and the separation of methanol is ensured; the guide cylinder extends into the main pipe, and part of steam passes through the guide hole, enters the guide cylinder and finally enters the branch pipe, so that the quantity of the steam entering the branch pipe is increased, and the quantity of the steam entering the methanol separation tower is reduced.

Description

Technical Field

[0001] The utility model relates to the field of methanol, in particular to the technical field of methanol separation towers, and specifically refers to a load reduction device for a methanol separation tower. Background Art

[0002] The steam discharged from the pressurized distillation tower is the steam of methanol and dimethyl carbonate. At this time, the temperature of the steam is relatively high, so this part of the steam will enter the reboiler of the raw material reaction tower and the reboiler of the methanol separation tower for heat exchange, and then the steam after heat exchange will enter the reflux tank. The reflux tank will transport this part of the steam to the methanol separation tower for methanol separation. The material in the raw material reaction tower is condensed and enters the feed tank of the pressurized distillation tower, and the material in the methanol separation tower also enters the feed tank of the pressurized distillation tower after condensation.

[0003] However, currently the reflux tank transports this part of steam to the methanol separation tower, which will increase the load in the methanol separation tower and affect the separation of methanol. Utility Model Content

[0004] Aiming at the deficiencies of the prior art, the utility model provides a methanol separation tower load reduction device, which reduces the load of the methanol separation tower and ensures the separation of methanol.

[0005] The utility model is realized through the following technical scheme: a methanol separation tower load reduction device comprises a main pipe connecting a reflux tank and a methanol separation tower, the main pipe is also connected to a branch pipe, and the other end of the branch pipe is connected to a feed port of a raw material reaction tower.

[0006] When the utility model is in use, part of methanol and part of the steam of dimethyl carbonate are transported to the raw material reaction tower, thereby reducing the amount of methanol entering the methanol separation tower, thereby reducing the load of the methanol separation tower and ensuring the separation of methanol.

[0007] Preferably, the axis of the branch pipe is arranged perpendicular to the main pipe.

[0008] This preferred solution facilitates the connection between the branch pipe and the main pipe when in use.

[0009] Preferably, the branch pipe is also slidably connected with a guide tube extending into the main pipe, the bottom of the guide tube extends into the main pipe, the circumferential surface of the guide tube is provided with a guide hole connected to the inner cavity of the guide tube, and the guide hole is located on the windward surface of the guide tube.

[0010] When the preferred solution is in use, since the steam will flow along the extension direction of the main pipe, the amount of steam entering the branch pipe is small, which causes the amount of steam entering the methanol separation tower to be still large. Therefore, the guide tube is extended into the main pipe, and part of the steam will pass through the guide hole into the guide tube and finally enter the branch pipe, thereby increasing the amount of steam entering the branch pipe and reducing the amount of steam entering the methanol separation tower.

[0011] Preferably, a guide rod is sealably connected to the bottom of the guide tube and extends outside the main tube and axially along the branch tube. A support plate is fixedly connected to the main tube and is arranged parallel to the guide rod and connected to the guide rod by bolts. The support plate is provided with a plurality of threaded through holes arranged along the extension direction of the support plate and threadedly connected to the bolts.

[0012] When in use, the guide tube is preferably adjusted in length by moving the guide rod to enter the main pipe, thereby adjusting the area of ​​intersection of the guide hole and the main pipe, thereby adjusting the diversion amount of steam. At the same time, when the amount of steam is small, after the guide tube completely enters the branch pipe, the guide tube blocks the branch pipe, thereby ensuring the supply of steam in the methanol separation tower.

[0013] Preferably, a reinforcing plate for the guide rod to penetrate is further provided on the outer circumferential surface of the main pipe.

[0014] In this preferred solution, the strength of the connection between the main pipe and the guide rod is enhanced by providing a reinforcing plate.

[0015] Preferably, the guide rod is provided with a blind hole threadedly connected to the bolt, and the guide rod is also provided with a limiting plate located between the blind hole and the main pipe.

[0016] This preferred solution prevents the blind hole from entering the main pipe by setting the limiting plate.

[0017] Preferably, a guide block having a windward surface that is a curved surface is further provided in the guide tube, and the guide hole faces the windward surface of the guide block.

[0018] In this preferred solution, the guide block is provided to guide the steam entering the branch pipe.

[0019] Preferably, the main pipe is further provided with two main flow pumps, the two main flow pumps are located on both sides of the branch pipe, and the branch pipe is provided with a branch flow pump.

[0020] This preferred solution monitors the steam flow rate by setting up a main flow pump and a branch flow pump, and also facilitates adjusting the amount of steam entering the branch pipe by adjusting the size of the flow pump.

[0021] The beneficial effects of the utility model are as follows: by conveying part of the steam of part of methanol and dimethyl carbonate to the raw material reaction tower, the amount of methanol entering the methanol separation tower is reduced, thereby reducing the load of the methanol separation tower and ensuring the separation of methanol; since the steam will flow along the extension direction of the main pipe, the amount of steam entering the branch pipe is small, which leads to a still large amount of steam entering the methanol separation tower, so the guide tube is extended into the main pipe, part of the steam will pass through the guide hole into the guide tube, and finally enter the branch pipe, thereby increasing the amount of steam entering the branch pipe, thereby reducing the amount of steam entering the methanol separation tower; the length of the guide tube entering the main pipe is adjusted by moving the guide rod, thereby adjusting the area of ​​the intersection of the guide hole and the main pipe, thereby adjusting the diversion amount of the steam, and at the same time, when the amount of steam is small, after the guide tube completely enters the branch pipe, the guide tube blocks the branch pipe, thereby ensuring the supply of steam in the methanol separation tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 for Figure 1 Schematic diagram of the connection between the main pipe and the branch pipe;

[0024] Figure 3 for Figure 2 The middle part is an enlarged schematic diagram;

[0025] As shown in the figure:

[0026] 1. Raw material reaction tower, 2. Pressurized distillation tower, 3. Feed tank of pressurized distillation tower, 4. Methanol separation tower, 5. Reboiler of methanol separation tower, 6. Reboiler of raw material reaction tower, 7. Reflux tank, 8. Main pipe, 9. Branch pipe, 10. Guide tube, 11. Guide hole, 12. Guide block, 13. Guide rod, 14. Support plate, 15. Reinforcement plate, 16. Bolt, 17. Limit plate. DETAILED DESCRIPTION

[0027] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0028] Refer to the attached Figure 1-3The utility model discloses a load reduction device for a methanol separation tower. The steam discharged from the pressurized distillation tower 2 is the steam of methanol and dimethyl carbonate. At this time, the temperature of the steam is relatively high, so this part of the steam will enter the reboiler 6 of the raw material reaction tower and the reboiler 5 of the methanol separation tower for a heat exchange. Then the steam after the heat exchange will enter the reflux tank 7. The reflux tank 7 will transport this part of the steam to the methanol separation tower 4 to separate the methanol. The material in the raw material reaction tower 1 is condensed and enters the feed tank 3 of the pressurized distillation tower. The material in the methanol separation tower 4 is condensed and also enters the feed tank 3 of the pressurized distillation tower.

[0029] The load reduction device includes a main pipe 8 connecting the reflux tank 7 and the methanol separation tower 4, and a branch pipe 9 is connected to the main pipe 8. The other end of the branch pipe 9 is connected to the feed port of the raw material reaction tower 1, and the axis of the branch pipe 9 is arranged perpendicular to the main pipe 8.

[0030] A guide tube 10 extending into the main tube 8 is also slidably connected in the branch tube 9, and the bottom of the guide tube 10 extends into the main tube 8. A guide hole 11 communicating with the inner cavity of the guide tube 10 is opened on the circumferential surface of the guide tube 10, and the guide hole 11 is located on the windward surface of the guide tube 10. A guide block 12 with a curved windward surface is also provided in the guide tube 10, and the guide hole 11 is directly opposite to the windward surface of the guide block 12.

[0031] The bottom of the guide tube 10 is also connected to a guide rod that extends outside the main tube 8 and axially along the branch tube 9 in a sealed manner. The main tube 8 is fixedly connected to a support plate 14 that is arranged in parallel with the guide rod and connected to the guide rod through bolts 16. The support plate 14 is provided with a plurality of threaded through holes that are arranged along the extension direction of the support plate 14 and are threadedly connected to the bolts 16.

[0032] A reinforcing plate 15 for the guide rod to penetrate is also provided on the outer circumferential surface of the main pipe 8 .

[0033] The guide rod 13 is provided with a blind hole threadedly connected with the bolt 16, and the guide rod 13 is also provided with a limit plate 17 located between the blind hole and the main pipe 8. The main pipe 8 is also provided with two main flow pumps, which are located on both sides of the branch pipe 9, and the branch pipe 9 is provided with a branch flow pump.

[0034] When the utility model is in use, part of the steam of part of methanol and dimethyl carbonate is transported to the raw material reaction tower 1, thereby reducing the amount of methanol entering the methanol separation tower 4, thereby reducing the load of the methanol separation tower 4 and ensuring the separation of methanol; since the steam will flow along the extension direction of the main pipe 8, the amount of steam entering the branch pipe 9 is small, which leads to a still large amount of steam entering the methanol separation tower 4, so the guide tube 10 is extended into the main pipe 8, part of the steam will pass through the guide hole 11 into the guide tube 10, and finally enter the branch pipe 9, thereby increasing the amount of steam entering the branch pipe 9, thereby reducing the amount of steam entering the methanol separation tower 4; the length of the guide tube 10 entering the main pipe 8 is adjusted by moving the guide rod, thereby adjusting the area of ​​the intersection of the guide hole 11 and the main pipe 8, thereby adjusting the diversion amount of the steam, and when the amount of steam is small, after the guide tube 10 completely enters the branch pipe 9, the guide tube 10 blocks the branch pipe 9, thereby ensuring the supply amount of steam in the methanol separation tower 4.

[0035] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A methanol separation tower load reduction device, comprising a main pipe (8) connecting a reflux tank (7) and a methanol separation tower (4), characterized in that: The main pipe (8) is also connected to a branch pipe (9), and the other end of the branch pipe (9) is connected to the feed port of the raw material reaction tower (1).

2. The methanol separation tower load reduction device according to claim 1, characterized in that: The axis of the branch pipe (9) is arranged perpendicular to the main pipe (8).

3. The methanol separation tower load reduction device according to claim 2, characterized in that: The branch pipe (9) is also slidably connected with a guide tube (10) extending into the main pipe (8); the bottom of the guide tube (10) extends into the main pipe (8); a guide hole (11) communicating with the inner cavity of the guide tube (10) is formed on the circumferential surface of the guide tube (10); the guide hole (11) is located on the windward surface of the guide tube (10).

4. The methanol separation tower load reduction device according to claim 3, characterized in that: The bottom of the guide tube (10) is also connected to a guide rod which extends outside the main tube (8) in a sealed manner and along the axial direction of the branch tube (9). The main tube (8) is fixedly connected to a support plate (14) which is arranged parallel to the guide rod and connected to the guide rod via bolts (16). The support plate (14) is provided with a plurality of threaded through holes which are arranged along the extension direction of the support plate (14) and are threadedly connected to the bolts (16).

5. The methanol separation tower load reduction device according to claim 3, characterized in that: The outer circumferential surface of the main pipe (8) is also provided with a reinforcing plate (15) through which the guide rod passes.

6. The methanol separation tower load reduction device according to claim 4, characterized in that: The guide rod (13) is provided with a blind hole threadedly connected to the bolt (16), and the guide rod (13) is also provided with a limit plate (17) located between the blind hole and the main pipe (8).

7. The methanol separation tower load reduction device according to claim 6, characterized in that: A guide block (12) having a windward surface that is a curved surface is also provided in the guide tube (10), and the guide hole (11) faces the windward surface of the guide block (12).

8. The methanol separation tower load reduction device according to claim 1, characterized in that: The main pipe (8) is also provided with two main flow pumps, the two main flow pumps are located on both sides of the branch pipe (9), and the branch pipe (9) is provided with a branch flow pump.

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