Automatic sampling and detecting system for high-viscosity materials

Abstract

The utility model belongs to the technical field of chemical engineering, and particularly relates to an automatic sampling and detecting system for high-viscosity materials, which comprises a mounting frame fixedly arranged at the upper end of a three-section neutralizing tank, a first telescopic cylinder is fixedly arranged on a top plate of the mounting frame, and the first telescopic cylinder is an electric cylinder with a displacement sensor; the first telescopic cylinder is arranged downwards, a sampling container is installed at the end of a piston rod of the first telescopic cylinder, a sampling opening for the sampling container to stretch into is formed in the top of the three-section neutralizing tank, a PH meter is arranged above the sampling container, and the PH meter is connected with a mounting frame through a connecting rod. The PH meter and the first telescopic cylinder are both connected with the controller. According to the utility model, automatic sampling is realized, manpower resources are saved, the labor intensity of workers is reduced, the PH value can be accurately measured within specified time, and the problem of inaccurate manual measurement time is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical engineering, and particularly relates to an automatic sampling and detection system for high-viscosity materials. Background Art

[0002] The production of nitrophosphate adopts indirect freezing for calcium removal and double-shaft horizontal granulation technology. The production process mainly includes: nitric acid decomposition of phosphate rock, separation of acid-insoluble substances, separation of calcium nitrate crystallization, ammonia neutralization of mother liquor, concentration of NP slurry, granulation, drying, screening, packaging, and conversion of calcium nitrate to prepare ammonium nitrate, etc.

[0003] During the production of nitrophosphate, the mother liquor is neutralized with gaseous ammonia to change the mother liquor from a strong acid to a weak acid ammonium salt slurry, and qualified liquid fertilizer is produced.

[0004] During the production of nitrophosphate, due to the particularity of the production process, impurities such as HF, H2SiF6, Fe(NO3), and AlNO3 contained in the mother liquor will react with ammonia when neutralized with gaseous ammonia, and more complex compounds may also be formed. If the amount of gaseous ammonia introduced is inappropriate, when the pH value of the neutralized slurry is 2.7, the viscosity will reach the highest point, and then another viscosity peak area will appear when pH > 4, becoming a gel-like fine crystal, thus increasing the viscosity of the slurry, blocking the neutralization chute, and making the neutralization process unable to operate.

[0005] During the ammonia neutralization of the mother liquor, as the pH value of the slurry increases, CaO in the solution will enter the solid phase. If the pH value is too high, a degradation reaction of phosphate may occur, reducing the P2O5 content in the finished product and making the product unqualified.

[0006] In summary, due to impurities such as HF, H2SiF6, Fe(NO3), and AlNO3 contained in the mother liquor participating in the reaction during neutralization, if the pH value of the slurry is not adjusted in time, the viscosity of the slurry will increase, affecting the progress of the neutralization reaction; if the pH value of the neutralized slurry is too high, phosphate degradation will occur. Therefore, it is necessary to frequently sample the high-viscosity material, and then control the pH value of the slurry well, avoid the slurry viscosity area in time, and achieve the stable operation of the neutralization process. However, in the prior art, the operation of sampling and analyzing during the mother liquor neutralization process is manual on-site sampling to measure the pH value, with a slow sampling speed, high manual labor intensity, and high labor cost. Content of the Utility Model

[0007] The utility model provides an automatic sampling and detection system for high-viscosity materials in view of the above problems.

[0008] To achieve the above object, the utility model adopts the following technical solutions:

[0009] An automatic sampling and detection system for high-viscosity materials, comprising a mounting frame fixedly arranged at the upper end of a three-stage neutralization tank. On the top plate of the mounting frame, a first telescopic cylinder is fixedly arranged. The first telescopic cylinder is an electric cylinder with a displacement sensor, and the first telescopic cylinder is arranged downward. At the end of the piston rod of the first telescopic cylinder, a sampling container is installed. At the top of the three-stage neutralization tank, a sampling port for the sampling container to extend into is provided. Above the sampling container, a pH meter is arranged. The pH meter is connected to the mounting frame through a connecting rod. Both the pH meter and the first telescopic cylinder are connected to a controller.

[0010] Furthermore, above the sampling port, a cover plate is provided. On the upper surface of the cover plate, a connecting block is fixedly arranged. The connecting block is connected to the piston rod of a second telescopic cylinder. The second telescopic cylinder is installed on the upper surface of the three-stage neutralization tank and is used to drive the cover plate to move. The second telescopic cylinder is connected to the controller.

[0011] Still further, on both sides of the cover plate, limit guide rails are provided. The limit guide rails are fixedly welded on the three-stage neutralization tank.

[0012] Even further, on the mounting frame, a cross bar is fixedly welded. At the end of the cross bar, a spray head is fixedly installed. The spray head is arranged towards the sampling container. The spray head is connected to the outlet of a water pump through a pipeline. The inlet of the water pump is connected to a water tank through a pipeline. The water pump is electrically connected to the controller.

[0013] Even further, the spray head is located on one side of the pH meter, so as to clean the detection end of the pH meter simultaneously during the backwashing process.

[0014] Even further, at the end of the piston rod of the first telescopic cylinder, a conical sealing head is fixedly arranged. The sampling container is slidably connected to the piston rod of the first telescopic cylinder. In the middle of the lower end of the sampling container, a conical drain port corresponding to the conical sealing head is provided. When the conical drain port and the conical sealing head are in complete cooperation, the sealing of the conical drain port can be achieved. The diameters of the upper and lower ends of the sampling container are smaller than the diameter of its middle part. On both sides of the sampling port, elastic support structures are symmetrically installed, so as to support the sampling container during the extension of the first telescopic cylinder and realize the separation of the conical drain port and the conical sealing head. Above the conical sealing head, a limit retaining piece is also provided to limit the sampling container and ensure that the sampling container can overcome the elastic force of the elastic support structure and then extend into the three-stage neutralization tank.

[0015] Furthermore, the elastic support structure includes a base, a slideway is provided in the base, a spring is arranged in the slideway, a slide column is arranged at the other end of the spring, the slide column is slidably connected with the slideway, a limit stop block is arranged at the outlet of the slide column, and a limit ring corresponding to the limit stop block is fixedly arranged at the inner side end of the slide column.

[0016] Furthermore, a ball head is integrally arranged at one end of the slide column in contact with the sampling container.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The utility model realizes automatic sampling, saves human resources, reduces the labor intensity of workers, can accurately measure the PH value within a specified time, and avoids the problem of inaccurate manual measurement time; at the same time, the utility model realizes the automatic detection of the PH value, and the detected data can be directly fed back to the controller, thereby accelerating the control and adjustment efficiency. Secondly, the utility model can also adjust the sampling frequency in a timely manner according to the production load situation, and the measurement data has a high accuracy rate.

[0019] After each PH value measurement is completed, the utility model can clean the sampling container and the PH meter, which is beneficial to improving the accuracy of PH value measurement. Description of the Drawings

[0020] Figure 1 It is a process flow chart of the neutralization of mother liquor and gaseous ammonia;

[0021] Figure 2 It is an installation schematic diagram of the utility model;

[0022] Figure 3 It is a use state diagram of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the utility model;

[0024] Figure 5 It is a structural schematic diagram of the sampling container of the utility model;

[0025] Figure 6 It is a sectional view of the elastic support structure of the utility model;

[0026] Figure 7 It is a control module diagram of the utility model;

[0027] In the figure, there are mounting frame 1, first telescopic cylinder 2, sampling container 3, sampling port 4, pH meter 5, pH meter 5, controller 6, cover plate 7, connecting block 8, second telescopic cylinder 9, limiting guide rail 10, cross bar 11, spray head 12, water pump 13, water tank 14, conical sealing head 15, conical drain port 16, elastic support structure 17, limiting stop 18, first-stage neutralization tank 19, second-stage neutralization tank 20, third-stage neutralization tank 21, NP feeding tank 22, connecting rod 23. Detailed implementation mode

[0028] In order to further elaborate on the technical solution of the present invention, the present invention will be further described below through embodiments.

[0029] As Figures 2 to 7 shown, an automatic sampling and detection system for high-viscosity materials includes a mounting frame 1 fixedly arranged at the upper end of the third-stage neutralization tank 21. A first telescopic cylinder 2 is fixedly arranged on the top plate of the mounting frame 1. The first telescopic cylinder 2 is an electric cylinder with a displacement sensor. The first telescopic cylinder 2 is arranged downward. A sampling container 3 is installed at the end of the piston rod of the first telescopic cylinder 2. A sampling port 4 for the sampling container 3 to extend into is arranged at the top of the third-stage neutralization tank 21. A cover plate 7 is arranged above the sampling port 4. Limiting guide rails 10 are arranged on both sides of the cover plate 7. The limiting guide rails 10 are fixedly welded on the third-stage neutralization tank 21. A connecting block 8 is fixedly arranged on the upper surface of the cover plate 7. The connecting block 8 is connected to the piston rod of the second telescopic cylinder 9. The second telescopic cylinder 9 is installed on the upper surface of the third-stage neutralization tank 21 and is used to drive the cover plate 7 to move. The second telescopic cylinder 9 is connected to the controller 6. A pH meter 5 is arranged above the sampling container 3. The pH meter 5 is connected to the mounting frame 1 through a connecting rod 23. Both the pH meter 5 and the first telescopic cylinder 2 are connected to the controller 6. A cross bar 11 is fixedly welded on the mounting frame 1. A spray head 12 is fixedly installed at the end of the cross bar 11. The spray head 12 is arranged facing the sampling container 3. The spray head 12 is connected to the outlet of the water pump 13 through a pipeline. The inlet of the water pump 13 is connected to the water tank 14 through a pipeline. The water pump 13 is electrically connected to the controller 6. The spray head 12 is located on one side of the pH meter 5 so as to clean the detection end of the pH meter 5 simultaneously during the backwashing process.

[0030] A conical sealing head 15 is fixedly arranged at the end of the piston rod of the first telescopic cylinder 2. The sampling container 3 is slidably connected to the piston rod of the first telescopic cylinder 2. A conical liquid discharge port 16 corresponding to the conical sealing head 15 is formed in the middle of the lower end of the sampling container 3. When the conical liquid discharge port 16 is in complete cooperation with the conical sealing head 15, the sealing of the conical liquid discharge port 16 can be achieved. The diameters of the upper end and the lower end of the sampling container 3 are smaller than the diameter of the middle part thereof. Elastic support structures 17 are symmetrically installed on both sides of the sampling port 4, so as to support the sampling container 3 during the extension of the first telescopic cylinder 2, and realize the separation of the conical liquid discharge port 16 from the conical sealing head 15. A limit retaining piece 18 is further arranged above the conical sealing head 15 to limit the sampling container 3, ensuring that the sampling container 3 can overcome the elastic force of the elastic support structure 17 and then extend into the three-section neutralization tank 21.

[0031] The elastic support structure 17 includes a base 1701. A slideway 1702 is formed in the base 1701. A spring 1703 is arranged in the slideway 1702. A slide column 1704 is arranged at the other end of the spring 1703. The slide column 1704 is slidably connected to the slideway 1702. A limit retaining block 1705 is arranged at the outlet of the slide column 1704. A limit ring 1706 corresponding to the limit retaining block 1705 is fixedly arranged at the inner end of the slide column 1704. A ball head 1707 is integrally arranged at the end of the slide column 1704 in contact with the sampling container 3.

[0032] When the sampling container 3 is in the state of being in the upper part of the elastic support structure 17, the second telescopic cylinder 9 drives the cover plate 7 to move and open the sampling port 4, and the first telescopic cylinder 2 drives the sampling container 3 to move downward. When passing through the elastic support structure 17, the elastic support structure 17 will initially support the sampling container 3, and the conical discharge port 16 will separate from the conical sealing head 15. When the bottom plate of the sampling container 3 contacts the limit stopper 18 and the first telescopic cylinder 2 continues to move downward, the first telescopic cylinder 2 will drive the sampling container 3 to overcome the force of the elastic support structure 17, open the elastic support structure 17, and then enter the three-stage neutralization tank 21 for sampling. After the sampling is completed, under the action of the sampling container 3's own gravity and the sample's gravity, the conical discharge port 16 and the conical sealing head 15 are matched to achieve the sealing of the conical discharge port 16. At the same time, after the sampling is completed, when passing through the elastic support structure 17, the elastic support structure 17 will again exert a force on the sampling container 3. The sample container 3 is moved upward by the telescopic cylinder 2 and the conical sealing head 15 is moved upward by the telescopic cylinder 2. The sample container 3 is moved upward by the telescopic cylinder 2 and the conical sealing head 15 is moved upward by the telescopic cylinder 2. The sample container 3 is moved upward by the telescopic cylinder 2 and the conical sealing head 15 is moved upward by the telescopic cylinder 2. The sample container 3 is moved upward by the telescopic cylinder 2 and the conical sealing head 15 is moved upward by the telescopic cylinder 2. The sample container 3 is moved upward by the telescopic cylinder 2 and the conical sealing head 15 is moved upward by the telescopic cylinder 2.

[0033] The above shows and describes the main features and advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the utility model.

[0034] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic sampling and detection system for high viscosity materials, characterized by: The invention comprises a mounting frame (1) fixedly arranged at the upper end of a three-stage neutralization groove (21), a No. 1 telescopic cylinder (2) fixedly arranged on the top plate of the mounting frame (1), the No. 1 telescopic cylinder (2) being an electric cylinder with a displacement sensor, the No. 1 telescopic cylinder (2) being arranged downward, a sampling container (3) being installed at the end of the piston rod of the No. 1 telescopic cylinder (2), a sampling port (4) for the sampling container (3) to be inserted into being arranged at the top of the three-stage neutralization groove (21), a pH meter (5) being arranged above the sampling container (3), the pH meter (5) being connected to the mounting frame (1) via a connecting rod (23), and the pH meter (5) and the No. 1 telescopic cylinder (2) being connected to a controller (6).

2. The automatic sampling and detection system for high-viscosity materials according to claim 1 is characterized in that: A cover plate (7) is arranged above the sampling port (4), and a connecting block (8) is fixedly arranged on the upper surface of the cover plate (7). The connecting block (8) is connected to the piston rod of a No. 2 telescopic cylinder (9). The No. 2 telescopic cylinder (9) is installed on the upper surface of the three-stage neutralization groove (21) and is used to drive the cover plate (7) to move. The No. 2 telescopic cylinder (9) is connected to a controller (6).

3. The automatic sampling and detection system for high-viscosity materials according to claim 2 is characterized in that: Limiting guide rails (10) are arranged on both sides of the cover plate (7), and the limiting guide rails (10) are fixedly welded on the three-section neutralization groove (21).

4. The automatic sampling and detection system for high-viscosity materials according to claim 1 is characterized in that: A cross bar (11) is fixedly welded on the mounting frame (1), a spray head (12) is fixedly mounted at the end of the cross bar (11), the spray head (12) is arranged toward the sampling container (3), the spray head (12) is connected to the outlet of a water pump (13) through a pipeline, the inlet of the water pump (13) is connected to a water tank (14) through a pipeline, and the water pump (13) is electrically connected to a controller (6).

5. The automatic sampling and detection system for high-viscosity materials according to claim 4 is characterized in that: The spray head (12) is located on one side of the pH meter (5) so as to clean the detection end of the pH meter (5) at the same time during the backwashing process.

6. The automatic sampling and detection system for high-viscosity materials according to claim 4 is characterized in that: A conical sealing head (15) is fixedly provided at the end of the piston rod of the first telescopic cylinder (2); the sampling container (3) is slidably connected to the piston rod of the first telescopic cylinder (2); a conical liquid discharge port (16) corresponding to the conical sealing head (15) is provided in the middle of the lower end of the sampling container (3); when the conical liquid discharge port (16) and the conical sealing head (15) are matched, the conical liquid discharge port (16) can be sealed; the diameters of the upper and lower ends of the sampling container (3) are smaller than the diameter of the middle part thereof; Elastic support structures (17) are symmetrically installed on both sides of the sampling port (4) so ​​as to support the sampling container (3) during the extension of the No. 1 telescopic cylinder (2) and achieve separation of the conical liquid discharge port (16) and the conical sealing head (15). A limit stopper (18) is also arranged above the conical sealing head (15) to limit the position of the sampling container (3) and ensure that the sampling container (3) can overcome the elastic force of the elastic support structure (17) and then extend into the three-stage neutralization groove (21).

7. The automatic sampling and detection system for high-viscosity materials according to claim 6 is characterized in that: The elastic support structure (17) comprises a base (1701), a slideway (1702) is provided in the base (1701), a spring (1703) is provided in the slideway (1702), a sliding column (1704) is provided at the other end of the spring (1703), the sliding column (1704) is slidably connected to the slideway (1702), a limit stopper (1705) is provided at the outlet of the sliding column (1704), and a limit ring (1706) corresponding to the limit stopper (1705) is fixedly provided at the inner side end of the sliding column (1704).

8. The automatic sampling and detection system for high-viscosity materials according to claim 7 is characterized in that: A ball head (1707) is integrally provided at one end of the sliding column (1704) that contacts the sampling container (3).

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