Automatic liquid stearic acid adding system

Abstract

The utility model discloses an automatic liquid stearic acid adding system which comprises a storage hopper, a melting tank, a weighing bin and an adding tank, an outlet of the storage hopper is connected with an inlet pipeline of the melting tank through a gate valve and a star-shaped discharge valve in sequence, an outlet of the melting tank is connected with an inlet pipeline of the weighing bin through a first plug valve, and an outlet of the weighing bin is connected with an inlet pipeline of the adding tank through a second plug valve and a third plug valve in sequence. An outlet of the adding tank is connected with an inlet pipeline of the kneading machine through a fourth plug valve; first heating jackets are fixedly arranged on the outer wall of the melting tank, the outer wall of the weighing bin and the outer wall of the adding tank; an air inlet of the adding tank is connected with a compressed air pipeline, the compressed air pipeline is provided with a first ball valve, a pressure relief opening of the adding tank is connected with a pressure relief pipeline, and the pressure relief pipeline is provided with a second ball valve.

Description

Technical Field

[0001] This utility model relates to the field of graphite electrode production technology, specifically to an automatic liquid stearic acid addition system. Background Technology

[0002] Modified pitch is typically used as a binder in the production of graphite electrodes. To lower the softening point of the modified pitch and improve the plasticity of the paste, stearic acid is added as an additive during the paste mixing process. Usually, the weighed solid stearic acid is added manually to the mixer during the specified mixing process.

[0003] The existing technical problem is that, since stearic acid is added manually, the interference of human operation cannot be eliminated. The dispersion speed of solid stearic acid in the paste is relatively slow, the mixing is uneven, and there are local stearic acid contents that are too high or too low, which affects the quality of graphite electrodes. Utility Model Content

[0004] The purpose of this invention is to provide an automatic liquid stearic acid addition system.

[0005] This utility model is implemented by the following technical solution: an automatic liquid stearic acid addition system, which includes a storage hopper, a melting tank, a weighing bin, and an addition tank;

[0006] The outlet of the storage hopper is connected to the inlet pipeline of the melting tank in sequence through a slide gate valve and a star-shaped discharge valve. The outlet of the melting tank is connected to the inlet pipeline of the weighing hopper through a first plug valve. The outlet of the weighing hopper is connected to the inlet pipeline of the feeding tank in sequence through a second plug valve and a third plug valve. The outlet of the feeding tank is connected to the inlet pipeline of the kneader through a fourth plug valve.

[0007] The outer wall of the melting tank, the outer wall of the weighing chamber, and the outer wall of the adding tank are fixedly provided with a first heating jacket;

[0008] The air inlet of the addition tank is connected to a compressed air pipeline, which is equipped with a first ball valve. The pressure relief port of the addition tank is connected to a pressure relief pipeline, which is equipped with a second ball valve.

[0009] Furthermore, a second steam jacket is fixedly provided on the outer wall of the connecting pipeline between the melting tank, the weighing chamber, the adding tank, and the kneader.

[0010] Furthermore, a first level gauge is fixed to the outer wall of the storage hopper, and the probe of the first level gauge is placed inside the storage hopper.

[0011] Furthermore, a second level gauge and a first temperature sensor are fixed to the outer wall of the melting tank, and the probes of the second level gauge and the first temperature sensor are placed inside the melting tank.

[0012] Furthermore, a third level gauge and a second temperature sensor are fixed to the outer wall of the weighing chamber, and the probes of the third level gauge and the second temperature sensor are placed inside the weighing chamber.

[0013] Furthermore, the melting tank is equipped with a stirrer at the top.

[0014] The advantages of this invention are: the automatic liquid stearic acid addition system can automatically add the weighed liquid stearic acid into the mixer using compressed air during the specified mixing process. Moreover, the liquid stearic acid can be quickly and evenly dispersed into the paste, and can fully contact and evenly mix with the asphalt and other components in the paste in a short time, thereby improving the plasticity of the paste and enhancing the quality of the graphite electrode. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 The system flowchart of this utility model;

[0017] In the diagram: 1. Storage hopper; 2. Slide valve; 3. Rotary star valve; 4. Melting tank; 5. First stop valve; 6. Weighing bin; 7. Second stop valve; 8. Third stop valve; 9. Addition tank; 10. Fourth stop valve; 11. Mixer; 11. First heating jacket; 13. Compressed air pipeline; 14. First ball valve; 15. Pressure relief pipeline; 16. Second ball valve; 17. Second steam jacket; 18. First level gauge; 19. Second level gauge; 20. First temperature sensor; 21. Agitator; 22. Third level gauge; 23. Second temperature sensor. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1 As shown, the automatic liquid stearic acid addition system includes a storage hopper 1, a melting tank 4, a weighing bin 6, and an addition tank 9.

[0020] The outlet of the storage hopper 1 is connected to the inlet pipeline of the melting tank 4 in sequence through the slide valve 2 and the star discharge valve 3. The outlet of the melting tank 4 is connected to the inlet pipeline of the weighing bin 6 through the first plug valve 5. The outlet of the weighing bin 6 is connected to the inlet pipeline of the feeding tank 9 in sequence through the second plug valve 7 and the third plug valve 8. The outlet of the feeding tank 9 is connected to the inlet pipeline of the kneader 11 through the fourth plug valve 10.

[0021] A first heating jacket 11 is fixedly provided on the outer wall of the melting tank 4, the outer wall of the weighing chamber 6, and the outer wall of the feeding tank 9. Steam is introduced into the first heating jacket 11 to heat the materials inside the melting tank 4, the weighing chamber 6, and the feeding tank 9.

[0022] The air inlet of the tank 9 is connected to a compressed air line 13, which is equipped with a first ball valve 14. The pressure relief port of the tank 9 is connected to a pressure relief line 15, which is equipped with a second ball valve 16.

[0023] A second steam jacket 17 is fixedly installed on the outer wall of the connecting pipeline between the melting tank 4, the weighing bin 6, the adding tank 9, and the kneader 11. Steam is introduced into the second steam jacket 17 to heat the material inside the connecting pipeline.

[0024] A first level gauge 18 is fixed to the outer wall of the storage hopper 1, and the probe of the first level gauge 18 is placed inside the storage hopper 1.

[0025] The outer wall of the melting tank 4 is fixed with a second level gauge 19 and a first temperature sensor 20, and the probes of the second level gauge 19 and the first temperature sensor 20 are placed inside the melting tank 4.

[0026] The top of the melting tank 4 is equipped with a stirrer 21, which facilitates the full melting of stearic acid and ensures that the heat is evenly distributed.

[0027] The outer wall of the weighing chamber 6 is fixed with a third level gauge 22 and a second temperature sensor 23, and the probes of the third level gauge 22 and the second temperature sensor 23 are placed inside the weighing chamber 6.

[0028] The amount of stearic acid added is measured by the first level gauge 18, the second level gauge 19, and the third level gauge 22, and the addition amount of stearic acid by each device is controlled by an automated control system. This automatic liquid stearic acid addition system allows the weighed liquid stearic acid to be automatically added to the kneader 11 using compressed air during a prescribed kneading process. Furthermore, the liquid stearic acid can be quickly and evenly dispersed into the paste, allowing it to fully contact and mix evenly with the asphalt and other components in the paste within a short time, improving the plasticity of the paste and enhancing the quality of the graphite electrode.

[0029] The specific operation process of this embodiment;

[0030] The bagged solid stearic acid is manually poured into the storage hopper 1. The solid stearic acid in the storage hopper 1 first passes through the slide valve 2, then through the star discharge valve 3, and reaches the melting tank 4. The first plug valve 5 is closed to melt the stearic acid.

[0031] When the melting tank 4 reaches the high material level, the slide gate valve 2 and the star-shaped discharge valve 3 are closed. Solid stearic acid is melted in the melting tank 4. When the temperature reaches 85 degrees and the melting tank 4 is at the high material level, the first stopcock valve 5 is opened and the second stopcock valve 7 is closed. The material enters the weighing bin 6 and is quantitatively weighed by a liquid scale. When the liquid stearic acid reaches the required set amount, after a 5-second delay, the third stopcock valve 8 and the second stopcock valve 7 are opened, and the second ball valve 16 is opened at the same time. The liquid stearic acid in the weighing bin 6 is added to the feeding tank 9. The second stopcock valve 7, the third stopcock valve 8 and the second ball valve 16 are closed, preparing to discharge the stearic acid into the kneader 11.

[0032] According to the corresponding kneading steps of the kneader 11, the fourth stop valve 10 is opened, and the first ball valve 14 is opened at the same time. Compressed air enters the stearic acid addition tank 9 and the liquid stearic acid in the addition tank 9 is blown into the kneader 11 by the compressed air. When the pressure of the pressure gauge on the electric contact of the compressed air pipeline is lower than 0.2MPa, the first ball valve 14 is closed and the fourth stop valve 10 is closed, thus completing the addition of stearic acid.

[0033] The system executes the next batching cycle;

[0034] Meanwhile, the first heating jacket 11 and the second steam jacket 17 are heated by steam, the temperature of the melting tank 4 is controlled above 85 degrees, and the temperature of the weighing bin 6, the adding tank 9 and the insulation pipe is controlled above 80 degrees.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquid stearic acid dosing system, characterized in that, It includes a storage hopper, a melting tank, a weighing bin, an adding tank; The outlet of the storage hopper is connected with the inlet pipeline of the melting tank through a plug valve and a star-shaped discharge valve in sequence, the outlet of the melting tank is connected with the inlet pipeline of the weighing bin through a first plug valve, the outlet of the weighing bin is connected with the inlet pipeline of the adding tank through a second plug valve and a third plug valve in sequence, and the outlet of the adding tank is connected with the inlet pipeline of the kneader through a fourth plug valve. First heating jackets are fixedly arranged on the outer walls of the melting tank, the weighing bin and the adding tank. An air inlet of the adding tank is connected with a compressed air pipeline, the compressed air pipeline is provided with a first ball valve, and a pressure relief port of the adding tank is connected with a pressure relief pipeline, and the pressure relief pipeline is provided with a second ball valve.

2. The liquid stearic acid dosing system of claim 1, wherein, Second steam jackets are fixedly arranged on the outer walls of the connecting pipelines between the melting tank, the weighing bin, the adding tank and the kneader.

3. The liquid stearic acid dosing system of claim 2, wherein, A first material level meter is fixed on the outer wall of the storage hopper, and a probe of the first material level meter is arranged in the storage hopper.

4. The liquid stearic acid dosing system of claim 3, wherein, Second material level meters and first temperature sensors are fixed on the outer wall of the melting tank respectively, and probes of the second material level meters and the first temperature sensors are arranged in the melting tank.

5. The liquid stearic acid dosing system of claim 4, wherein, Third material level meters and second temperature sensors are fixed on the outer wall of the weighing bin, and probes of the third material level meters and the second temperature sensors are arranged in the weighing bin.

6. The liquid stearic acid dosing system of claim 5, wherein, A stirrer is arranged on the top of the melting tank.

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