Device for automatically adjusting pH value of ammonia-containing methanol solution

Abstract

The utility model relates to the field of methanol liquid pH adjustment, in particular to a device for automatically adjusting the pH value of ammonia-containing methanol liquid, which comprises a mixing barrel, a first electric valve is fixedly arranged at the bottom of the mixing barrel, an adjusting and stirring mechanism is arranged above the mixing barrel, and the adjusting and stirring mechanism comprises a mounting cover plate. A pH online detector is fixedly arranged above the mounting cover plate through bolts, a motor mounting frame is fixedly arranged above the mounting cover plate through bolts, and a stepping motor is fixedly arranged above the motor mounting frame through bolts; according to the utility model, the stepping motor is used for driving the double mechanisms to work, and the extrusion cylinder is used for extruding the elastic hose to convey materials, so that the precision is higher than that of manual valve opening and closing. And when the sulfuric acid is dropwise added, the stirring paddle stirs the liquid, so that the ammonia-containing methanol liquid and the sulfuric acid are more uniformly mixed, and the situation that the pH values of all areas are inconsistent due to non-uniform mixing of the ammonia-containing methanol liquid and the sulfuric acid is avoided.

Description

Technical Field

[0001] The utility model relates to the field of pH regulation of methanol liquid, in particular to a device for automatically regulating the pH value of ammonia-containing methanol liquid. Background Art

[0002] Alcoholamines are alcoholamine compounds that have both an amino group and an alcoholic hydroxyl group. Since their molecular structures contain both amino groups and hydroxyl groups, they have the comprehensive properties of both amines and alcohols and are an important basic chemical raw material. For example, in the prior art, 2-amino-2-methyl-1-propanol (AMP-95) and tris(hydroxymethyl)aminomethane (tris) are both alcoholamines. In their preparation processes, ammonia-containing methanol solutions are involved, and pH adjustment is required to avoid affecting the purity and yield of the product.

[0003] A common device for adjusting the pH value of ammonia-containing methanol liquid is to add ammonia-containing methanol liquid into the device, and then drip sulfuric acid into the ammonia-containing methanol liquid by opening and closing an electric valve. However, in the ammonia-containing methanol liquid, the accuracy of dripping sulfuric acid by opening and closing an electric valve is difficult to control, and excessive sulfuric acid is easily added, and it is necessary to add ammonia-containing methanol liquid again for adjustment, which makes the pH adjustment of the ammonia-containing methanol liquid more complicated. In addition, in the process of adding sulfuric acid to the ammonia-containing methanol liquid, it is necessary to stir it synchronously to prevent the excessive sulfuric acid content in some areas from causing a large fluctuation range of the pH value. In the prior art, the addition of sulfuric acid and the mixing of the ammonia-containing methanol liquid are performed step by step, resulting in the need to stop the feeding of sulfuric acid and the mixing and stirring of the ammonia-containing methanol liquid at the same time after the pH adjustment of the ammonia-containing methanol liquid is completed.

[0004] In view of the above technical defects, a solution is now proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a device for automatically adjusting the pH value of ammonia-containing methanol liquid to solve the above-mentioned technical defects.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a device for automatically adjusting the pH value of ammonia-containing methanol liquid, comprising a mixing barrel, a first electric valve is fixedly provided at the bottom of the mixing barrel, an adjusting stirring mechanism is provided above the mixing barrel, the adjusting stirring mechanism comprises a mounting cover plate, a pH online detector is fixedly provided above the mounting cover plate by bolts, a housing is fixedly provided above the mounting cover plate by bolts, a rotating frame is provided inside the housing, and three extrusion cylinders are provided on the outer side of the rotating frame;

[0007] A motor mounting frame is fixedly provided on the top of the mounting cover plate by bolts, a stepper motor is fixedly provided on the top of the motor mounting frame by bolts, a rotating shaft of the stepper motor passes through the motor mounting frame and is fixedly provided with a coupling, a stirring shaft is fixedly provided at the bottom of the coupling, and two stirring paddles are fixedly provided at one end of the stirring shaft located in the mixing barrel by bolts.

[0008] Preferably, the bottom of the mixing barrel is conical, and the lower conical surface of the mixing barrel is provided with three axially distributed bottom columns, the top of the bottom columns are fixed to the mixing barrel by bolts, the bottom of the bottom columns are fixed with square gaskets, and the upper part of the interior of the mixing barrel is also fixed with array-distributed wire fixing buckles.

[0009] Preferably, the bottom of the wire fixing buckle is provided with an array-distributed detection head fixing ring, and the detection head fixing ring is fixedly connected to the inner wall of the mixing barrel.

[0010] Preferably, the mounting cover is fixedly connected to the mixing barrel by bolts, the interior of the motor mounting frame is provided with symmetrically distributed limit plates, a mounting hole is also opened above the mounting cover, a first liquid inlet pipe is fixedly provided on one side above the mounting cover, a second liquid inlet pipe is fixedly provided on the other side above the mounting cover, a third electric valve is also fixedly provided at one end of the first liquid inlet pipe, and the other end of the third electric valve is fixedly connected to a pipeline for conveying ammonia-containing methanol liquid.

[0011] Preferably, a connecting cable is fixedly provided at the bottom of the pH online detector, one end of the connecting cable is fixedly connected to a detection head, and the connecting cable is fixed to the inner wall of the mixing barrel by a wire fixing buckle.

[0012] Preferably, the detection head is fixed to the inner wall of the mixing barrel through a detection head fixing ring, and a first spur gear is fixedly provided on the outer side of the stirring shaft, and the first spur gear is located between the limit plate and the mounting cover plate.

[0013] Preferably, one end of the stirring shaft passes through the mounting cover and extends into the mixing barrel, an elastic hose is placed between the rotating frame and the inner wall of the shell, a connecting shaft is fixedly provided inside the rotating frame, a second spur gear is fixedly provided on the connecting shaft after passing through the shell, and one end of the connecting shaft extends into the mounting hole and is rotatably connected to the mounting hole.

[0014] Preferably, the second spur gear meshes with the first spur gear, a second electric valve is fixedly provided at one end of the elastic hose, the other end of the second electric valve is fixedly connected to a pipeline for conveying sulfuric acid, and the other end of the elastic hose is fixedly connected to a second liquid inlet pipe.

[0015] Preferably, a cover plate is fixed on the top of the shell by bolts.

[0016] The beneficial effects of the utility model are as follows:

[0017] The utility model starts a stepper motor to drive the stirring shaft to rotate, and when the stirring shaft rotates, it drives the first straight gear and the stirring paddle to rotate, and the stirring paddle rotates to stir the liquid in the mixing barrel, and the first straight gear rotates to drive the second straight gear to rotate synchronously, and the second straight gear rotates to drive the rotating frame to rotate, and when the rotating frame rotates, it drives the extrusion cylinder on the outside to make a circular motion, and at this time, the extrusion cylinder squeezes the elastic hose so that the sulfuric acid in the elastic hose is transported to one side, until the sulfuric acid is dripped into the mixing barrel through the second liquid inlet pipe, and at this time, the pH online detector is started, and the pH online detector starts to display the pH value of the ammonia methanol liquid in the mixing barrel, until the pH value is adjusted to a suitable value and then the stepper motor is turned off, and at this time, the stirring paddle stops stirring, and the addition of sulfuric acid at the elastic hose stops;

[0018] The device uses a single driving source to drive the dual mechanisms to work simultaneously, which is more energy-efficient than using dual driving sources to drive the dual mechanisms to work. The use of an extrusion barrel to extrude an elastic hose for feeding has higher precision than manually opening and closing valves. When sulfuric acid is dripped, a stirring paddle is also provided to stir the liquid, so that the ammonia-containing methanol liquid and the sulfuric acid are mixed more evenly, thereby avoiding the situation where the pH value of each area is different due to uneven mixing of the ammonia-containing methanol liquid and the sulfuric acid, resulting in a decrease in detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings;

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the connection structure of the mixing barrel in the utility model;

[0022] Figure 3 It is a schematic diagram of the overall structure of the regulating stirring mechanism in the utility model;

[0023] Figure 4 It is a schematic diagram of the connection structure of the installation cover plate in the utility model;

[0024] Figure 5 It is a schematic diagram of the connection structure of the stepping motor in the utility model.

[0025] Legend: 1. Mixing barrel; 11. Bottom column; 12. Square gasket; 13. Wire fixing buckle; 14. Detection head fixing ring; 15. First electric valve; 2. Adjust stirring mechanism; 21. Install cover plate; 22. Motor mounting frame; 23. First liquid inlet pipe; 24. Limit plate; 25. Mounting hole; 26. Second liquid inlet pipe; 27. pH online detector; 28. Connecting cable; 29. ​​Detection head; 30. Stepper motor; 31. Coupling; 32. First spur gear; 33. Stirring shaft; 34. Stirring paddle; 35. Shell; 36. Rotating frame; 361. Extrusion cylinder; 37. Second spur gear; 38. Elastic hose; 39. Second electric valve; 40. Third electric valve; 41. Cover plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-Figure 5 As shown, the utility model is a device for automatically adjusting the pH value of ammonia-containing methanol liquid, comprising a mixing barrel 1, the bottom of the mixing barrel 1 is conical, so as to facilitate better discharging, the lower conical surface of the mixing barrel 1 is provided with three axially distributed bottom columns 11, the top of the bottom column 11 is fixed to the mixing barrel 1 by bolts, the bottom of the bottom column 11 is fixed with a square gasket 12, the bottom of the mixing barrel 1 is also fixed with a first electric valve 15, and the switch of the first electric valve 15 is used to control the discharging of the mixing barrel 1, and the upper part of the interior of the mixing barrel 1 is also fixed with an array of wire fixing buckles 13, the bottom of the wire fixing buckle 13 is provided with an array of detection head fixing rings 14, and the detection head fixing ring 14 is fixedly connected to the inner wall of the mixing barrel 1.

[0028] An adjusting and stirring mechanism 2 is also provided above the mixing barrel 1, and the adjusting and stirring mechanism 2 includes a mounting cover 21, which is fixedly connected to the mixing barrel 1 by bolts, and a motor mounting frame 22 is fixedly provided above the mounting cover 21 by bolts, and symmetrically distributed limit plates 24 are provided inside the motor mounting frame 22. A mounting hole 25 is also opened above the mounting cover 21, and a first liquid inlet pipe 23 is fixedly provided on one side above the mounting cover 21.

[0029] A second liquid inlet pipe 26 is fixedly provided on the other side above the installation cover plate 21. The first liquid inlet pipe 23 is used for adding ammonia-containing methanol liquid, and the second liquid inlet pipe 26 is used for adding sulfuric acid. A third electric valve 40 is also fixedly provided at one end of the first liquid inlet pipe 23. The other end of the third electric valve 40 is fixedly connected to a pipeline for conveying ammonia-containing methanol liquid. Switching the third electric valve 40 is used to adjust the feed of ammonia-containing methanol liquid at the first liquid inlet pipe 23.

[0030] A pH online detector 27 is also fixed above the mounting cover 21 by bolts, a connecting cable 28 is fixed at the bottom of the pH online detector 27, one end of the connecting cable 28 is fixedly connected to a detection head 29, the connecting cable 28 is fixed to the inner wall of the mixing barrel 1 by a wire fixing buckle 13, and the detection head 29 is fixed to the inner wall of the mixing barrel 1 by a detection head fixing ring 14 to prevent the connecting cable 28 and the detection head 29 from rotating during stirring and causing damage.

[0031] A stepper motor 30 is fixedly installed on the top of the motor mounting frame 22 by bolts. A coupling 31 is fixedly installed after the rotating shaft of the stepper motor 30 passes through the motor mounting frame 22. A stirring shaft 33 is fixedly installed at the bottom of the coupling 31. A first spur gear 32 is fixedly installed on the outer side of the stirring shaft 33. The first spur gear 32 is located between the limit plate 24 and the mounting cover plate 21.

[0032] One end of the stirring shaft 33 passes through the mounting cover 21 and extends into the mixing barrel 1. One end of the stirring shaft 33 located in the mixing barrel 1 is fixed with two stirring paddles 34 by bolts. When the stirring paddles 34 rotate, the liquid in the mixing barrel 1 is stirred and mixed. A shell 35 is also fixed with bolts above the mounting cover 21. A rotating frame 36 is rotatably connected inside the shell 35. Three rotatably connected extrusion cylinders 361 are provided on the outer side of the rotating frame 36. An elastic hose 38 is also placed between the rotating frame 36 and the inner wall of the shell 35. When the rotating frame 36 rotates, it drives the extrusion cylinder 361 on its outer side to make a circular motion. At this time, the extrusion cylinder 361 squeezes the elastic hose 38 so that the liquid in the elastic hose 38 is transported.

[0033] A connecting shaft is also fixedly provided inside the rotating frame 36. After the connecting shaft passes through the shell 35, a second spur gear 37 is fixedly provided. One end of the connecting shaft extends into the mounting hole 25 and is rotatably connected to the mounting hole 25. The second spur gear 37 is meshed with the first spur gear 32. A second electric valve 39 is fixedly provided at one end of the elastic hose 38. The other end of the second electric valve 39 is fixedly connected to a pipeline for conveying sulfuric acid. The other end of the elastic hose 38 is fixedly connected to the second liquid inlet pipe 26. A cover plate 41 is also fixedly provided on the top of the shell 35 by bolts.

[0034] The working process and principle of the utility model are as follows:

[0035] When in use, first open the third electric valve 40 to allow the ammonia-containing methanol liquid to flow into the mixing barrel 1 through the first liquid inlet pipe 23. After the ammonia-containing methanol liquid in the mixing barrel 1 is added, close the third electric valve 40. At this time, open the second electric valve 39 to connect the sulfuric acid delivery pipeline with the elastic hose 38.

[0036] Then, the stepper motor 30 is started, and the stepper motor 30 drives the stirring shaft 33 to rotate through the coupling 31. When the stirring shaft 33 rotates, it drives the first spur gear 32 and the stirring paddle 34 to rotate. The stirring paddle 34 rotates to stir the liquid in the mixing barrel 1. The rotation of the first spur gear 32 drives the second spur gear 37 to rotate synchronously. The rotation of the second spur gear 37 drives the rotating frame 36 to rotate. When the rotating frame 36 rotates, it drives the extrusion cylinder 361 on its outer side to make a circular motion. At this time, the extrusion cylinder 361 squeezes the elastic hose 38 so that the sulfuric acid in the elastic hose 38 is transported to one side until the sulfuric acid is dripped into the mixing barrel 1 through the second liquid inlet pipe 26;

[0037] At this time, start the pH online detector 27, and the pH online detector 27 begins to display the pH value of the ammonia methanol solution in the mixing barrel 1. After the pH value is adjusted to an appropriate value, turn off the stepper motor 30, stop stirring the stirring paddle 34, stop adding sulfuric acid at the elastic hose 38, and then open the first electric valve 15 to discharge the material.

[0038] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A device for automatically adjusting the pH value of an ammonia-containing methanol solution, comprising a mixing barrel (1), wherein a first electric valve (15) is fixedly provided at the bottom of the mixing barrel (1), It is characterized in that An adjusting and stirring mechanism (2) is provided above the mixing barrel (1), and the adjusting and stirring mechanism (2) comprises a mounting cover plate (21), and a pH online detector (27) is fixedly provided above the mounting cover plate (21) by means of bolts, and a housing (35) is also fixedly provided above the mounting cover plate (21) by means of bolts, and a rotatably connected rotating frame (36) is provided inside the housing (35), and three rotatably connected extrusion cylinders (361) are provided on the outer side of the rotatable frame (36); A motor mounting frame (22) is fixedly provided above the mounting cover plate (21) by means of bolts, a stepping motor (30) is fixedly provided above the motor mounting frame (22) by means of bolts, a rotating shaft of the stepping motor (30) passes through the motor mounting frame (22) and is fixedly provided with a coupling (31), a stirring shaft (33) is fixedly provided at the bottom of the coupling (31), and two stirring paddles (34) are fixedly provided at one end of the stirring shaft (33) located in the mixing barrel (1) by means of bolts.

2. A device for automatically adjusting the pH value of ammonia-containing methanol liquid according to claim 1, It is characterized in that The bottom of the mixing barrel (1) is conical, and the lower conical surface of the mixing barrel (1) is provided with three axially distributed bottom columns (11), the top of the bottom column (11) is fixed to the mixing barrel (1) by bolts, the bottom of each bottom column (11) is fixed with a square gasket (12), and the upper part of the interior of the mixing barrel (1) is also fixed with an array of wire fixing buckles (13).

3. A device for automatically adjusting the pH value of ammonia-containing methanol liquid according to claim 2, It is characterized in that The bottom of the wire fixing buckle (13) is provided with detection head fixing rings (14) distributed in an array, and the detection head fixing rings (14) are fixedly connected to the inner wall of the mixing barrel (1).

4. A device for automatically adjusting the pH value of ammonia-containing methanol liquid according to claim 1, It is characterized in that The mounting cover plate (21) is fixedly connected to the mixing barrel (1) by bolts, and the interior of the motor mounting frame (22) is provided with symmetrically distributed limit plates (24). A mounting hole (25) is also opened above the mounting cover plate (21). A first liquid inlet pipe (23) is fixedly provided on one side above the mounting cover plate (21), and a second liquid inlet pipe (26) is fixedly provided on the other side above the mounting cover plate (21). A third electric valve (40) is also fixedly provided at one end of the first liquid inlet pipe (23), and the other end of the third electric valve (40) is fixedly connected to a pipeline for conveying ammonia-containing methanol liquid.

5. A device for automatically adjusting the pH value of ammonia-containing methanol liquid according to claim 1, It is characterized in that A connecting cable (28) is fixedly provided at the bottom of the pH online detector (27), one end of the connecting cable (28) is fixedly connected to a detection head (29), and the connecting cable (28) is fixed to the inner wall of the mixing barrel (1) via a wire fixing buckle (13).

6. A device for automatically adjusting the pH value of ammonia-containing methanol liquid according to claim 5, It is characterized in that The detection head (29) is fixed to the inner wall of the mixing barrel (1) via a detection head fixing ring (14); a first spur gear (32) is fixedly provided on the outer side of the stirring shaft (33); and the first spur gear (32) is located between the limit plate (24) and the mounting cover plate (21).

7. A device for automatically adjusting the pH value of ammonia-containing methanol liquid according to claim 1, It is characterized in that One end of the stirring shaft (33) passes through the mounting cover plate (21) and extends into the mixing barrel (1); an elastic hose (38) is placed between the rotating frame (36) and the inner wall of the shell (35); a connecting shaft is fixedly provided inside the rotating frame (36); a second spur gear (37) is fixedly provided on the connecting shaft after passing through the shell (35); one end of the connecting shaft extends into the mounting hole (25) and is rotatably connected to the mounting hole (25).

8. A device for automatically adjusting the pH value of ammonia-containing methanol liquid according to claim 7, It is characterized in that The second spur gear (37) is meshed with the first spur gear (32); a second electric valve (39) is fixedly provided at one end of the elastic hose (38); the other end of the second electric valve (39) is fixedly connected to a pipeline for conveying sulfuric acid; and the other end of the elastic hose (38) is fixedly connected to a second liquid inlet pipe (26).

9. A device for automatically adjusting the pH value of ammonia-containing methanol liquid according to claim 1, It is characterized in that A cover plate (41) is also fixed above the housing (35) by means of bolts.

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