A drug injection device for reducing coking in equipment

Abstract

The utility model relates to the technical field of chemical equipment, and in particular to a drug injection device for reducing coking in equipment, comprising a nitrogen inlet pipeline, on which a nitrogen inlet valve is provided, for injecting sealed nitrogen into a medicine tank; a drug liquid injection pipeline, on which a pneumatic pump and a ball valve are provided, for pumping the drug liquid into the medicine tank; a medicine tank, at the bottom of which a main drug outlet pipeline is provided, at the end of which one or more drug outlet branches are provided, and each branch line is provided with a drug injection pump, and the terminal drug outlet of the drug outlet branch line is connected to the access pipeline of the equipment to be added. By adding the drug injection device in the process, the inhibitor is injected into the medicine tank through the pneumatic pump, and the inhibitor is added to the stripping tower and the reboiler through the drug injection pump outside the medicine tank, so as to effectively prevent coking in the tower plate and the reboiler. The structure is simple and easy to install, and the service life of the stop tower plate and the reboiler can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a drug injection device for reducing coking in equipment. Background Art

[0002] The cracked gasoline and carbon nine from the ethylene unit are mixed and then enter the gasoline stripping tower for stripping. The C4 and light fractions stripped from the top of the tower enter the compression section with the cracked gas, and the carbon nine at the bottom of the tower is pumped to the tank area. Since benzene, butadiene and other substances in cracked gasoline are easily polymerized, excessive accumulation of polymers will clog the gasoline stripping tower trays and reboiler, affecting the stable operation of the system and the quality of gasoline products. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a drug injection device for reducing coking in equipment, comprising:

[0004] A nitrogen inlet pipe is provided with a nitrogen inlet valve for injecting sealed nitrogen into the medicine tank;

[0005] The liquid medicine injection pipeline is provided with a pneumatic pump and a ball valve for pumping the liquid medicine into the medicine tank;

[0006] The medicine tank has a main medicine outlet pipeline at the bottom of the body, one or more medicine outlet branches are arranged at the end of the main medicine outlet pipeline, each branch line is respectively provided with a medicine injection pump, and the end outlet of the medicine outlet branch line is connected to the access pipeline of the equipment to be added with medicine.

[0007] Furthermore, the drug outlet is provided with a flow calibration column.

[0008] Furthermore, a ball valve and a filter are provided on the main medicine outlet pipeline.

[0009] Furthermore, three injection pumps are provided.

[0010] Furthermore, a breathing valve is provided at the top of the medicine tank.

[0011] Furthermore, a liquid level gauge is arranged on the outside of the medicine tank.

[0012] Furthermore, a sewage discharge pipeline is provided at the bottom of the medicine tank, and a sewage discharge ball valve is provided on the sewage discharge pipeline.

[0013] Furthermore, a base is provided at the bottom of the medicine tank and a ladder platform can be provided on the side for easy maintenance.

[0014] Furthermore, a sampling valve is provided on the drug solution injection pipeline.

[0015] By adding the injection device during the process, the inhibitor is injected into the medicine tank through the pneumatic pump, and then the inhibitor is added to the stripping tower and reboiler through the injection pump outside the medicine tank, which effectively prevents coking in the tower tray and reboiler. The structure is simple and easy to install, which can effectively increase the service life of the tower tray and reboiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural front view of an embodiment of the utility model;

[0017] Figure 2 It is a left side view of an embodiment structure of the utility model;

[0018] Figure 3 It is a top view of an embodiment structure of the utility model.

[0019] In the figure, 1. nitrogen inlet pipe; 2. medicine tank; 3. medicine liquid injection pipe; 4. pneumatic pump; 5. ball valve; 6. main medicine outlet pipeline; 7. medicine injection pump; 8. flow calibration column; 9. Y-type filter; 10. breathing valve; 11. ladder platform; 12. sampling valve; 13. base; 14. liquid level meter; 15. medicine outlet; 16. nitrogen unloading pipeline; 17. sewage pipeline. DETAILED DESCRIPTION

[0020] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0021] refer to Figure 1 The utility model provides a drug injection device for reducing coking in equipment, comprising:

[0022] The nitrogen inlet pipe 1 is provided with a nitrogen inlet valve for injecting sealing nitrogen into the medicine tank 2 to seal the medicine tank 2 with nitrogen.

[0023] The liquid medicine injection pipeline 3 is provided with a pneumatic pump 4 and a ball valve 5 for pumping the liquid medicine into the medicine tank 2; the pneumatic pump 4 and the nitrogen gas inlet pipeline 1 of the medicine tank 2 are both connected to the nitrogen gas source pipeline.

[0024] The medicine tank 2 has a main medicine outlet pipeline 6 at the bottom of the body, and three medicine outlet branches are arranged at the end of the main medicine outlet pipeline 6. A medicine injection pump 7 is arranged on each branch line, and the end outlet of the medicine outlet branch line is connected to the access pipeline of the equipment to be added with medicine.

[0025] The drug solution, in this solution, uses the prepared inhibitor, is pumped into the drug tank 2 through the pneumatic pump 4, and after being buffered in the drug tank 2, it is pumped into the access pipeline of the equipment through the drug injection pump 7 through the drug outlet main pipeline 6 at the bottom.

[0026] As an improvement of the solution, the drug outlet is provided with a flow calibration column 8, which can control the amount of the inhibitor entering the stop tray and the reboiler.

[0027] As an improvement of the solution, a ball valve 5 and a Y-type filter 9 are provided on the medicine outlet main pipeline 6. The filter is used to filter out the particulate impurities in the injection.

[0028] As an improvement to the solution, a breathing valve 10 is provided at the top of the medicine tank 2, and the breathing valve 10 is used to control the air pressure in the medicine tank 2 to be stable.

[0029] As an improvement of the solution, a liquid level meter 14 is provided on the outside of the medicine tank 2, so that the remaining amount of the inhibitor in the medicine tank 2 can be visually observed for timely supply.

[0030] As an improvement of the solution, a sewage discharge pipeline is provided at the bottom of the medicine tank 2, and a sewage discharge ball valve 5 is provided on the sewage discharge pipeline. If the medicine tank is put into use for a long time, unqualified injection will exist at the bottom of the tank, which needs to be discharged in time.

[0031] As an improvement to the solution, a base 13 is provided at the bottom of the medicine tank 2 and a ladder platform 11 may be provided on the side for easy maintenance.

[0032] As an improvement of the solution, a sampling valve 12 is provided on the liquid medicine injection pipeline 3, and the sampling valve can take samples of the injection agent every period of time and analyze whether it is qualified, and make adjustments in time.

[0033] In this solution, a nitrogen unloading pipeline is also provided on the medicine tank 2, and a nitrogen unloading valve is provided on the nitrogen unloading pipeline.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drug injection device for reducing coking in equipment, characterized in that: include, A nitrogen inlet pipe (1) is provided with a nitrogen inlet valve for injecting sealed nitrogen into the medicine tank (2); A liquid medicine injection pipeline (3) is provided with a pneumatic pump (4) and a ball valve (5) for pumping the liquid medicine into the medicine tank (2); The medicine tank (2) has a main medicine outlet pipeline (6) at the bottom of the main medicine outlet pipeline (6), one or more medicine outlet branches are arranged at the end of the main medicine outlet pipeline (6), each branch line is respectively provided with a medicine injection pump (7), and the end medicine outlet of the medicine outlet branch line is connected to the access pipeline of the equipment to be added with medicine.

2. A drug injection device for reducing coking in equipment according to claim 1, characterized in that: The medicine outlet is provided with a flow calibration column (8).

3. A drug injection device for reducing coking in equipment according to claim 1, characterized in that: A ball valve (5) and a filter (9) are provided on the medicine outlet main pipeline (6).

4. A drug injection device for reducing coking in equipment according to claim 1, characterized in that: A breathing valve (10) is provided at the top of the medicine tank (2).

5. A drug injection device for reducing coking in equipment according to claim 1, characterized in that: A liquid level gauge is arranged on the outside of the medicine tank (2).

6. A drug injection device for reducing coking in equipment according to claim 1, characterized in that: A sewage discharge pipeline is arranged at the bottom of the medicine tank (2), and a sewage discharge ball valve (5) is arranged on the sewage discharge pipeline.

7. A drug injection device for reducing coking in equipment according to claim 1, characterized in that: A base (13) is provided at the bottom of the medicine tank (2), and a ladder platform (11) may be provided on the side for easy maintenance.

8. The drug injection device for reducing coking in equipment according to claim 1, characterized in that: A sampling valve (12) is provided on the liquid medicine injection pipeline (3).

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