Nitrogen purging device for deslagging pipeline of acetic acid evaporator

Abstract

The utility model provides a nitrogen purging device for a deslagging pipeline of an acetic acid evaporator, which relates to the technical field of deslagging of evaporators and comprises an evaporator and a residue recovery device, the evaporator comprises a deslagging pipe, an electromagnetic valve is arranged on the deslagging pipe, the deslagging pipe is communicated with the residue recovery device through a conveying pipe, and the nitrogen purging device further comprises a high-pressure air pump. The input end of the high-pressure air pump is communicated with a nitrogen source, the output end of the high-pressure air pump is communicated with the three-way pipe, and two output pipelines of the three-way pipe are communicated with the first circulating pipe and the second circulating pipe respectively; according to the device, the residues stored in the conveying pipe can be blown and swept so as to be directionally transferred into residue recovery equipment, the interior of the evaporator can be blown and swept at the same time, the situation that discharging of the evaporator is not smooth is obviously reduced, the residues can rapidly move along the conveying pipe under the blowing action of two strands of wind power, and the discharging efficiency of the evaporator is improved. And therefore, the residue purging effect is remarkably improved, and the using effect of the residue discharging pipeline is better.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporator slag discharging, and in particular to a nitrogen purging device for the slag discharging pipeline of an acetic acid evaporator. Background Technique

[0002] At present, an evaporator is required in the preparation process of crude acetic anhydride. After acetic acid is evaporated in the evaporator, acetic acid vapor is formed, and then the acetic acid vapor is introduced into a cracking furnace for cracking to generate cracked gas.

[0003] After long-term evaporation of acetic acid, residues will be formed in the evaporator. Then, the residues need to be discharged into a closed pipeline, and then the residues move along the closed pipeline and finally are injected into a residue recovery system for subsequent processing. At present, in order to prevent the residues from blocking in the closed pipeline, a nitrogen purging method is generally used to realize the movement of the residues along the closed pipeline. However, this cannot ensure the discharging effect of the residues in the evaporator. If the discharging is not smooth, manual intervention is still required frequently for dredging, and the use effect of the slag discharging pipeline needs to be further optimized. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems put forward in the above background technique, and then a nitrogen purging device for the slag discharging pipeline of an acetic acid evaporator is proposed.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A nitrogen purging device for the slag discharging pipeline of an acetic acid evaporator includes an evaporator and a residue recovery device. The evaporator includes a slag discharging pipe, a solenoid valve is arranged on the slag discharging pipe, and the slag discharging pipe and the residue recovery device are connected through a conveying pipe. The device also includes a high-pressure air pump. The input end of the high-pressure air pump is connected to a nitrogen source, and the output end of the high-pressure air pump is connected to a three-way pipe. The two output pipelines of the three-way pipe are respectively connected to a first flow pipe and a second flow pipe. One end of the first flow pipe is connected to the inside of the conveying pipe through a purging assembly, and one end of the second flow pipe is connected to the inside of the evaporator and purges obliquely downward.

[0007] This device can not only realize the purging of the residues stored in the conveying pipe and then transfer them to the residue recovery device in a directional manner, but also purge the inside of the evaporator at the same time, thereby significantly reducing the occurrence of unsmooth discharging of the evaporator. Under the blowing action of the two airflows, the residues can move quickly along the conveying pipe, and thus the purging effect of the residues is significantly improved, and the use effect of the slag discharging pipeline is better.

[0008] Further, a vibration motor is arranged on the evaporator.

[0009] The above scheme can further improve the discharging effect of the residues by cooperating with the vibration motor to purge the inside of the evaporator, and thus the residues are more smooth during the discharging process.

[0010] Further, the purging assembly includes a main blowing pipe and branch pipes. A main blowing pipe and a plurality of circulation holes are provided on the conveying pipe. A plurality of branch pipes corresponding to and communicating with the circulation holes one by one are provided on the main blowing pipe, and the main blowing pipe communicates with the first circulation pipe.

[0011] The above solution realizes the directional nitrogen purging of the residue inside the conveying pipe through the purging assembly.

[0012] Further, a rotating shaft is rotatably connected inside the conveying pipe. A drum is provided on the rotating shaft, and one end of the rotating shaft is connected to a servo motor fixed on the outer wall of the conveying pipe. A plurality of turning rods are circumferentially provided on the drum.

[0013] The above solution can ultimately drive the movement of a plurality of turning rods through the action of the servo motor, thereby further reducing the probability of blockage of the residue discharged from the evaporator in the conveying pipe.

[0014] Further, a scraper in contact with the inner wall of the conveying pipe is provided at one end of the turning rod.

[0015] Further, a heating plate is provided on the scraper.

[0016] Since the residue of the evaporator contains moisture in the above solution, in order to reduce the probability of the residue adhering to the inner wall of the conveying pipe, a scraper and a heating plate are additionally provided. The scraper can scrape off some of the residue adhering to the inner wall of the conveying pipe, and the heating plate can dry the residue, thereby further improving the conveying effect of the residue in the conveying pipe and reducing the amount of residue remaining and adhering.

[0017] Further, flow valves independently controlled are respectively provided on the two output pipelines of the three-way pipe.

[0018] The above solution can independently control the flow rate and flow velocity of nitrogen delivered to the evaporator and the conveying pipe through two flow valves.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] Compared with the prior art, the present device can not only realize the purging of the residue stored in the conveying pipe and then direct transfer to the residue recovery device, but also simultaneously purge the inside of the evaporator, thereby significantly reducing the occurrence of unsmooth discharge of the evaporator. The residue can move rapidly along the conveying pipe under the blowing action of the two airflows, thereby significantly improving the purging effect of the residue and making the use effect of the slag discharge pipeline better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 is Figure 1Partial enlarged view of reference numeral A;

[0023] Reference numerals:

[0024] 1. Evaporator; 11. Slag discharge pipe; 12. Solenoid valve; 13. Vibration motor; 2. High-pressure air pump; 21. Three-way pipe; 22. Second flow pipe; 23. First flow pipe; 24. Blowing main pipe; 25. Branch pipe; 3. Delivery pipe; 31. Flow hole; 4. Residue recovery device; 51. Rotating shaft; 52. Drum; 53. Turning rod; 54. Scraper; 55. Electric heating plate. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. The present invention will be further described in conjunction with the drawings and embodiments:

[0026] As Figure 1 and Figure 2 shown, a nitrogen purging device for the slag discharge pipeline of an acetic acid evaporator includes an evaporator 1 and a residue recovery device 4, both of which belong to the prior art and are not improved. The evaporator 1 includes a slag discharge pipe 11, a solenoid valve 12 is arranged on the slag discharge pipe 11, and the slag discharge pipe 11 and the residue recovery device 4 are connected through a delivery pipe 3. It also includes a high-pressure air pump 2. The input end of the high-pressure air pump 2 is connected to a nitrogen source (not shown in the figure). The output end of the high-pressure air pump 2 is connected to a three-way pipe 21. The two output pipelines of the three-way pipe 21 are respectively connected to a first flow pipe 23 and a second flow pipe 22. One end of the first flow pipe 23 is connected to the inside of the delivery pipe 3 through a purging assembly, and one end of the second flow pipe 22 is connected to the inside of the evaporator 1 and purges obliquely downward.

[0027] Specifically, the purging assembly includes a blowing main pipe 24 and a branch pipe 25. A blowing main pipe 24 and a plurality of flow holes 31 are arranged on the delivery pipe 3. A plurality of branch pipes 25 corresponding to and communicating with the flow holes 31 one by one are arranged on the blowing main pipe 24, and the blowing main pipe 24 is connected to the first flow pipe 23.

[0028] For further optimization of the solution of the embodiment of the present invention, as Figure 1 shown, flow valves independently controlled are respectively arranged on the two output pipelines of the three-way pipe 21 (the flow valves are shown in the figure without reference numerals); the flow rate and flow velocity of nitrogen delivered to the evaporator 1 and the delivery pipe 3 can be independently controlled through the two flow valves.

[0029] For further optimization of the solution of the embodiment of the present invention, asFigure 1 As shown, a vibration motor 13 is provided on the evaporator 1.

[0030] It should be noted that the solenoid valve 12, the high-pressure air pump 2, and the flow valve are all electrically connected to the controller, and the controller is not shown in the figure.

[0031] The working process of the present utility model:

[0032] After the evaporator 1 has been used for a period of time, first the controller controls the solenoid valve 12 to open, and then immediately controls the vibration motor 13 and the high-pressure air pump 2 to work simultaneously. After the high-pressure air pump 2 works, nitrogen can be injected into both the evaporator 1 and the conveying pipe 3 at the same time. The nitrogen injected into the evaporator 1 can give a downward blowing force to the residue, thereby improving the discharging effect of the residue. Combined with the vibration motor 13, the discharging effect of the residue in the evaporator 1 is better. The nitrogen blown into the conveying pipe 3 can make the residue move along the conveying pipe 3 and finally be injected into the residue recovery device 4 for further processing. At this time, the residue can move rapidly along the conveying pipe 3 under the blowing action of the two airflows, so that the blowing effect of the residue is significantly improved, the probability of blockage occurring during the discharging process of the residue in the evaporator 1 is greatly reduced, there is no need for frequent manual intervention, the degree of automation is improved, and the discharging is smoother;

[0033] Compared with the prior art, this device can not only realize the blowing of the residue stored in the conveying pipe 3 and the directional transfer to the residue recovery device 4, but also blow the inside of the evaporator 1 at the same time, thereby significantly reducing the occurrence of unsmooth discharging of the evaporator 1. The residue can move rapidly along the conveying pipe 3 under the blowing action of the two airflows, so that the blowing effect of the residue is significantly improved, and the use effect of the discharge pipe 11 line is better.

[0034] In some embodiments, as Figure 1 and Figure 2 shown, a rotating shaft 51 is rotatably connected inside the conveying pipe 3. A roller 52 is provided on the rotating shaft 51, and one end of the rotating shaft 51 is connected to a servo motor fixed on the outer wall of the conveying pipe 3. The servo motor is not shown in the figure. A plurality of turning rods 53 are circumferentially arranged on the roller 52. In this embodiment, through the action of the servo motor, a plurality of turning rods 53 can be finally driven to move, thereby further reducing the probability of blockage of the residue discharged from the evaporator 1 in the conveying pipe 3.

[0035] For further optimization of the above-described embodiment, a scraping plate 54 in contact with the inner wall of the conveying pipe 3 is provided at one end of the turning rod 53, and a heating plate 55 is provided on the scraping plate 54. In this embodiment, since the residue in the evaporator 1 contains moisture, the scraping plate 54 and the heating plate 55 are additionally provided to reduce the probability of the residue adhering to the inner wall of the conveying pipe 3. The scraping plate 54 can scrape off some of the residue adhering to the inner wall of the conveying pipe 3, and the heating plate 55 can dry the residue, thereby further improving the conveying effect of the residue in the conveying pipe 3 and reducing the amount of residue and adhesion.

[0036] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above-described embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all such changes and improvements fall within the scope of the present invention as claimed. The scope of the present invention as claimed is defined by the appended claims and their equivalents.

Claims

1. A nitrogen purging device for the slag discharge pipeline of an acetic acid evaporator, comprising an evaporator (1) and a residue recovery device (4). The evaporator (1) includes a slag discharge pipe (11). A solenoid valve (12) is provided on the slag discharge pipe (11), and the slag discharge pipe (11) and the residue recovery device (4) are connected through a delivery pipe (3). It is characterized in that, It further includes a high-pressure air pump (2). The input end of the high-pressure air pump (2) is connected to a nitrogen source, and the output end of the high-pressure air pump (2) is connected to a three-way pipe (21). The two output pipelines of the three-way pipe (21) are respectively connected to a first flow pipe (23) and a second flow pipe (22). One end of the first flow pipe (23) is connected to the inside of the conveying pipe (3) through a purging assembly, and one end of the second flow pipe (22) is connected to the inside of the evaporator (1) and purges obliquely downward.

2. The nitrogen purging device for the slag discharge pipeline of an acetic acid evaporator according to claim 1, characterized in that, A vibration motor (13) is provided on the evaporator (1).

3. The nitrogen purging device for the slag discharge pipeline of an acetic acid evaporator according to claim 1, characterized in that, The purging assembly includes a main blowing pipe (24) and branch pipes (25). A main blowing pipe (24) and a number of flow holes (31) are provided on the conveying pipe (3). A number of branch pipes (25) corresponding to and communicating with the flow holes (31) one by one are provided on the main blowing pipe (24), and the main blowing pipe (24) is connected to the first flow pipe (23).

4. A nitrogen purging device for the slag discharge pipeline of an acetic acid evaporator according to claim 1, characterized in that, A rotating shaft (51) is rotatably connected inside the conveying pipe (3). A roller (52) is provided on the rotating shaft (51), and one end of the rotating shaft (51) is connected to a servo motor fixed on the outer wall of the conveying pipe (3). A number of material turning rods (53) are circumferentially arranged on the roller (52).

5. A nitrogen purging device for the slag discharge pipeline of an acetic acid evaporator according to claim 4, characterized in that, One end of the material turning rod (53) is provided with a scraping plate (54) in contact with the inner wall of the conveying pipe (3).

6. The nitrogen purging device for the slag discharge pipeline of an acetic acid evaporator according to claim 5, characterized in that, A heating plate (55) is provided on the scraping plate (54).

7. A nitrogen purging device for the slag discharge pipeline of an acetic acid evaporator according to claim 1, characterized in that, Independent control flow valves are respectively provided on the two output pipelines of the three-way pipe (21).

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