A slurry separation device
By designing a crystal slurry separation device that combines conical and straight pipe sections with a long conical pipe, the problem of poor fluidity of high solids content crystal slurry was solved, realizing the transport of high solids content crystal slurry without clogging, thus improving processing efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- RIZHAO JINHE BOYUAN BIOCHEM
- Filing Date
- 2025-05-27
- Publication Date
- 2026-06-09
AI Technical Summary
In existing citric acid evaporation crystallization systems, high-solids-content crystal slurries have poor fluidity, which can easily lead to pipeline blockage and affect processing efficiency.
Design a crystal slurry separation device, including a conical first pipe section and a straight second pipe section. Combined with a long conical pipe, by controlling the pipe diameter change and angle setting, large solid particles settle and small particles float. Utilize gravity to improve fluidity and avoid clogging.
This increases the solids content of the slurry while ensuring fluidity, preventing pipe blockage and improving processing efficiency.
Smart Images
Figure CN224331575U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a crystal slurry separation device and is in the field of citric acid crystallization technology. Background Technology
[0002] Currently, in the citric acid industry, evaporative crystallizers are generally used to evaporate the water in citric acid solutions, causing the solution to become supersaturated and crystals to precipitate. In evaporative crystallization systems, to improve the extraction yield, the higher the solid content of the evaporative crystallizer output, the better. However, a higher solid content will result in poorer crystal slurry flowability, causing pipeline blockage and affecting processing efficiency. Utility Model Content
[0003] The purpose of this invention is to design a crystal slurry separation device that can improve the solid content of crystal slurry.
[0004] This utility model includes a separation tube, comprising a first pipe section with an inlet and a second pipe section whose inlet end is connected to the outlet end of the first pipe section. The first pipe section is a tapered pipe, with its diameter gradually increasing as it extends from its inlet to the second pipe section. The second pipe section is a straight pipe with the same diameter. The second pipe section is connected to a second outlet. A feed pipe with a feed pump is connected to the inlet of the first pipe section. A first outlet is provided on the second pipe section and is connected to a first outlet pipe with a first valve. The diameter of the first outlet is smaller than the diameter of the second pipe section. In this crystal slurry separation device, after the crystal slurry enters the first pipe section, the flow rate of the crystal slurry decreases as the diameter of the first pipe section gradually increases, causing large solid particles in the crystal slurry to settle and small solid particles to float. The crystal slurry carrying small solid particles flows into the first outlet pipe, and the crystal slurry carrying large solid particles flows into the second outlet pipe, increasing the solid content of the crystal slurry in the second outlet pipe.
[0005] Furthermore, the second pipe section is connected to the long conical pipe, with the end of the long conical pipe serving as the second discharge port. The diameter of the long conical pipe gradually decreases from its beginning to its end. By installing the long conical pipe in this manner, when the crystal slurry carrying large solid particles enters the long conical pipe, the flow rate of the crystal slurry increases as the diameter of the long conical pipe decreases, thus preventing the high-solid-content crystal slurry from clogging the pipeline.
[0006] Furthermore, the second pipe segment forms an angle greater than 90 degrees with the axis of the long tapered pipe; the second pipe segment is connected to the long tapered pipe via a bend. The long tapered pipe can run in the same direction as the first and second pipe segments, but this is not conducive to the flow of the crystal slurry in this invention. Setting a certain angle between the two is beneficial to improving the fluidity of the crystal slurry.
[0007] Furthermore, the inlet and outlet diameters of the bend are the same. This method allows the high-solids-content slurry to smoothly enter the long tapered tube.
[0008] Furthermore, the first and second pipe sections are inclined from high to low, with both inclined in the same direction; the long conical pipe is vertically arranged. By employing this method, the fluidity of the crystal slurry can be improved through gravity.
[0009] Furthermore, the second discharge port is connected to a second discharge pipe equipped with a second valve. Flow meters and sampling pipes with sampling valves are respectively installed on the inlet pipe, the first discharge pipe, and the second discharge pipe. This method allows for the detection of the crystal slurry in each pipeline, facilitating tracking and subsequent adjustments.
[0010] This invention comprises a first pipe section and a second pipe section. When the slurry from the evaporator crystallizer enters the first pipe section, the flow rate of the slurry decreases due to the gradually increasing diameter of the first pipe section, causing large solid particles to settle and small solid particles to float. The small solid particles then enter the first discharge pipe in the second pipe section, while the large solid particles enter the second discharge pipe, thus achieving slurry separation and increasing the solids content of the slurry in the second discharge pipe. A vertically arranged long conical pipe is connected to the second pipe section via a bend. When the high-solids-content slurry enters the long conical pipe, the gradually decreasing diameter of the long conical pipe increases the slurry flow rate, which is further amplified by gravity, allowing the slurry to flow quickly out of the second discharge pipe and preventing the high-solids-content slurry from clogging the pipes. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;
[0012] The components are: 1. Feed pipe, 2. Feed pump, 3. First flow meter, 4. Feed valve, 5. First pipe section, 6. Second pipe section, 7. First discharge pipe, 8. First valve, 9. Second flow meter, 10. Bend, 11. Long tapered pipe, 12. Second discharge pipe, 13. Second valve, 14. Third flow meter, 15. First sampling pipe, 16. First sampling valve, 17. Second sampling pipe, 18. Second sampling valve, 19. Third sampling pipe, 20. Third sampling valve. Detailed Implementation
[0013] by Figure 1 Define the up, down, left, and right directions in this embodiment.
[0014] As shown in the figure, this embodiment includes a feed pipe 1, on which a feed pump 2 is installed for conveying crystal slurry. A first flow meter 3 is installed on the right side of the feed pipe 1 for detecting the flow rate of the crystal slurry in the feed pipe 1. A feed valve 4 is installed to the right of the first flow meter 3. In use, the flow rate of the crystal slurry in the feed pipe 1 can be controlled by adjusting the valve opening of the feed valve 4. In this embodiment, a first sampling pipe 15 is installed on the feed pipe 1 to the right of the feed valve 4. A first sampling valve 16 is installed on the first sampling pipe 15 to control its opening and closing, which can sample and test the crystal slurry in the feed pipe 1 for subsequent adjustments.
[0015] A separation pipe connected to the right side of the feed pipe 1 is provided. The separation pipe includes a first pipe section 5 and a second pipe section 6. The left end of the first pipe section 5 is the feed inlet, which is connected to the feed pipe 1. In this embodiment, the first pipe section 5 is a tapered pipe, and its diameter gradually increases as it extends from its feed inlet to the second pipe section 6. When the crystal slurry flows into the first pipe section 5, the flow rate of the crystal slurry decreases as the diameter of the first pipe section 5 increases. The inlet end on the left side of the second pipe section 6 is connected to the outlet end of the first pipe section 5. In this embodiment, the second pipe section 6 is a straight pipe with the same diameter as the outlet end of the first pipe section 5. The upper part of the second pipe section 6 is provided with a first discharge port, which is connected to the first discharge pipe 7. The diameter of the first discharge port is smaller than that of the second pipe section 6, which can ensure sufficient pressure in the first discharge pipe 7 so that the crystal slurry in the second pipe section 6 flows into the first discharge pipe 7. A first valve 8 is provided on the left side of the first discharge pipe 7, which can control the flow rate of the crystal slurry in the first discharge pipe 7 by adjusting the opening of the first valve 8. A second flow meter 9 is provided on the right side of the first valve 8 to detect the flow rate of the crystal slurry in the first discharge pipe 7. In this embodiment, both the first pipe section 5 and the second pipe section 6 are inclined from high to low, which can improve the fluidity of the crystal slurry in the two pipe sections. A second sampling pipe 17 is provided on the first discharge pipe 7 to the right of the second flow meter 9. A second sampling valve 18 is provided on the second sampling pipe 17 to control its opening and closing, which can sample and detect the crystal slurry in the first discharge pipe 7 for subsequent adjustment.
[0016] A long conical pipe 11 is provided on the right side of the second pipe section 6, forming an angle greater than 90 degrees with the long conical pipe 11. In this embodiment, the angle is 120 degrees, which is beneficial to the flow of crystal slurry. The long conical pipe 11 is vertically arranged, with its lower end serving as the second discharge port. The diameter of the long conical pipe 11 gradually decreases from its beginning to its end. As the crystal slurry flows into the long conical pipe 11, the flow rate of the crystal slurry increases with the decreasing diameter of the long conical pipe 11. The vertical arrangement of the long conical pipe 11 can further increase the flow rate of the crystal slurry in the pipe through gravity, avoiding pipe blockage. The outlet end on the right side of the second pipe section 6 is connected to the long conical pipe 11 through a bend 10. The inlet and outlet ports of the bend 10 have the same diameter, ensuring that the crystal slurry with high solids content flows smoothly into the long conical pipe 11. A second discharge pipe 12 is connected to the second discharge port. A second valve 13 is installed on the left side of the second discharge pipe 12. The flow rate of the crystal slurry in the second discharge pipe 12 can be controlled by adjusting the opening of the second valve 13. A third flow meter 14 is installed on the right side of the second valve 13 to detect the flow rate of the crystal slurry in the second discharge pipe 12. A third sampling pipe 19 is installed on the second discharge pipe 12 to the right of the third flow meter 14. A third sampling valve 20 is installed on the third sampling pipe 19 to control its opening and closing, which can sample and test the crystal slurry in the second discharge pipe 12 for subsequent adjustments.
[0017] In this embodiment, during use, the feed valve 4, the first valve 8, and the second valve 13 are first opened, and the feed pump 2 is started to deliver crystal slurry into the feed pipe 1. The crystal slurry flows into the separation pipe. As the diameter of the first pipe section 5 increases, the flow rate of the crystal slurry decreases, large solid particles in the crystal slurry settle, and small solid particles float. In the second pipe section 6, the crystal slurry carrying small solid particles flows into the first discharge pipe 7 through the first discharge port, while the crystal slurry carrying large solid particles flows into the long conical pipe 11 through the bend pipe 10. The crystal slurry flows downward in the long conical pipe 11. As the diameter of the long conical pipe 11 decreases, the crystal slurry in the pipe flows rapidly to the second discharge pipe 12 and is output from the second discharge pipe 12.
[0018] During the crystal slurry transport process, sampling is carried out in the first sampling tube 15. The opening of the first and second valves is adjusted according to the proportion of large particles in the crystal slurry in the feed pipe 1. If the proportion of large particles in the feed pipe 1 is high, the valve opening of the first valve 8 needs to be controlled to be less than the valve opening of the second valve 13 in order to increase the output of crystal slurry in the second discharge pipe 12.
[0019] During the crystal slurry transport process, samples are taken from the second and third sampling tubes. The settling velocity of large solid particles in the first and second pipe sections is determined based on the viscosity of the crystal slurry and the density of fixed particles in the first and second discharge pipes. For example, if the density of large solid particles in the crystal slurry sampled from the second sampling tube 17 is high, it indicates that the settling velocity of the large solid particles is slow. The opening of the feed valve 4 and the first and second valves needs to be reduced to slow down the flow rate of the crystal slurry and allow the large solid particles in the crystal slurry sufficient settling time.
Claims
1. A crystal slurry separation device, comprising a separation tube, characterized in that: The separation pipe includes a first pipe section with a feed inlet and a second pipe section whose inlet end is connected to the outlet end of the first pipe section. The first pipe section is a tapered pipe, and its diameter gradually increases as it extends from its feed inlet to the second pipe section. The second pipe section is a straight pipe with the same diameter. The second pipe section is connected to a second discharge port. A feed pipe with a feed pump is connected to the feed inlet of the first pipe section. A first discharge port is provided on the second pipe section, which is connected to a first discharge pipe with a first valve. The diameter of the first discharge port is smaller than the diameter of the second pipe section.
2. The crystal slurry separation device according to claim 1, characterized in that: The second pipe section is connected to the long conical pipe, and the end of the long conical pipe is the second discharge port. The diameter of the long conical pipe gradually decreases from the beginning to the end.
3. The crystal slurry separation device according to claim 2, characterized in that: The second pipe section forms an angle with the axis of the long tapered pipe, and the angle is greater than 90 degrees; the second pipe section is connected to the long tapered pipe through a bend.
4. The crystal slurry separation device according to claim 3, characterized in that: The inlet and outlet ports of the bend have the same diameter.
5. The crystal slurry separation apparatus according to claim 2, 3, or 4, characterized in that: The first and second pipe sections are inclined from high to low, and their inclination directions are the same; the long tapered pipe is set vertically.
6. The crystal slurry separation apparatus according to claim 1, 2, 3, or 4, characterized in that: The second discharge port is connected to the second discharge pipe with the second valve. Flow meters and sampling pipes with sampling valves are installed on the feed pipe, the first discharge pipe and the second discharge pipe, respectively.