CN210331728U - Clarification device of solution crystallizer - Google Patents
Clarification device of solution crystallizer Download PDFInfo
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- CN210331728U CN210331728U CN201920555121.0U CN201920555121U CN210331728U CN 210331728 U CN210331728 U CN 210331728U CN 201920555121 U CN201920555121 U CN 201920555121U CN 210331728 U CN210331728 U CN 210331728U
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Abstract
The utility model relates to a clarification device of a solution crystallizer. The vertical section of the device consists of a right-angled trapezoid inlet area, a rectangular main clarification area and a material discharge pipe; the crystallizer and the clarification device thereof are cylindrical; the top position of the clarifying device is arranged to be flush with the liquid level position in the crystallizer. The width of the rectangular main clarification area of the clarification device is determined by 2 times of the calculated cross-sectional area of the particle sedimentation theory; the height of the rectangular main clarifying zone comprises the effective height and the epitaxial height; the effective height is calculated from the central line of the material discharging pipe, and is downwards until the horizontal position corresponding to the joint of the rectangular main clarifying area and the right-angled trapezoid inlet area, and the extension height is calculated from the central line of the material discharging pipe, and is upwards until the horizontal line at the top of the clarifying device. The utility model discloses a device has reduced the clarification and has distinguished the interference of entry flow field to main clarification district, and the settlement of target particle size is guaranteed in the main clarification district of rectangle, and small-size particle is then smooth and easy overflow and arrange outward, reaches the well hierarchical purpose of granularity.
Description
Technical Field
The utility model relates to a solution crystallization device, in particular to a clarification device of a solution crystallizer with particle size classification.
Background
The crystallizer is used as important production equipment in the industries of medicine, materials, chemical fertilizers and the like, the quality of the structure of the crystallizer not only seriously affects the product quality, but also relates to the production energy consumption cost, and therefore, the structure optimization of the crystallizer is always important work for the research of industrial crystallizers. In the industrial crystallization process, the sizes of crystal particles are different due to different residence times of the crystal particles, and the concentration of particle size distribution and the particle size of a product are influenced. For this reason, the industrial crystallizer production process often needs the product of large-particle crystals to settle, then discharges, filters and dries to obtain the product, while the fine crystals need to overflow and redissolve, and then the solution returns to the crystallizer for crystallization, so that the product of crystals with larger and more uniform particle size can be obtained. In order to achieve the above purpose, many crystallizers are often required to have a function of discharging large-particle-size sedimentation and overflowing small-particle-size particles, that is, a function of classifying particle sizes. Currently, there are many crystallizers related to size classification, such as an Oslo crystallizer, a DTB crystallizer, a DP crystallizer and the like. However, the inlet area of the clarification structure of the crystallizers is often larger, and the height of the clarification area is often smaller, so that the poor uniformity of the flow field of the clarification area is easy to cause to influence the grading effect of the particle size of the crystal particles. To this end, the utility model provides a novel form particle grading type clarification device.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the granularity grading effect in the solution crystallizer is optimized through the improvement of the structure of the device in the clarification area of the crystallizer.
In order to realize the above object of the present invention, the following technical solution is adopted to realize:
a clarification device of a solution crystallizer; the vertical section of the device consists of a right-angled trapezoid inlet area, a rectangular main clarification area and a material discharge pipe; the crystallizer and the clarification device thereof are cylindrical; the top position of the clarifying device is arranged to be flush with the liquid level position in the crystallizer.
The width of the rectangular main clarification area of the clarification device is determined by 2 times of the calculated cross-sectional area of the particle sedimentation theory; the height of the rectangular main clarifying zone comprises the effective height and the epitaxial height; the effective height is calculated from the central line of the material discharging pipe, and is downwards until the horizontal position corresponding to the joint of the rectangular main clarifying area and the right-angled trapezoid inlet area, and the extension height is calculated from the central line of the material discharging pipe, and is upwards until the horizontal line at the top of the clarifying device; the effective height of the rectangular main clarifying zone is 40 times of the diameter of the material discharge pipe; the extension height of the rectangular main clarification zone is 150mm +0.5 times the diameter of the material discharge pipe.
The width of a channel communicated with the crystallizer in a right-angle trapezoid inlet area of the clarification device is 1/5 of the width of the rectangular main clarification area, and the height of the right-angle trapezoid inlet area is 6 times of the width of the rectangular main clarification area.
The specific device is described as follows:
the crystallization solution passes through an air zone and a liquid surface of the crystallizer in sequence through a feeding pipe and enters the crystallizer, crystal nucleation and growth are carried out under the action of a stirrer, a part of grown crystals are settled to a discharge pipe of the crystallizer under the action of gravity, and then are discharged, filtered and dried to obtain a crystal product, a part of crystal particles enter a clarifying device along with the flow of fluid, the particles firstly enter a right-angle trapezoid inlet zone, the particles with the target granularity and above are settled by gravity in a rectangular main clarifying zone, and finer crystal particles are taken out by a material discharge pipe along with the fluid and enter a subsequent treatment link, so that the purpose of clarifying and grading the crystal granularity is achieved. The clarifying device (6) is communicated with the solution material in the crystallizer (1).
The utility model has the advantages that: the interference of a clarification zone inlet flow field on a main clarification zone is reduced, meanwhile, the rectangular main clarification zone with proper length is beneficial to ensuring the sedimentation of target granularity particles, and the small granularity particles are smoothly overflowed and discharged outside, so that the aim of grading the granularity well is fulfilled.
Drawings
FIG. 1 is a longitudinal sectional view of a solution crystallizer and its clarification structure according to an embodiment
1-crystallizer; 2-a stirrer; 3-liquid level; 4-feed pipe; 5-discharge pipe; 6-a clarification device; 6-1-right trapezoid entrance area; 6-2-rectangular main clarification zone; 6-3-material external discharge pipe; 6-3-1-center line of material discharge pipe; 6-4-top of clarification device 7-air zone; (ii) a H1-the height of the right trapezoid entry area; h2-the effective height of the rectangular main clearing zone; h3-the extension height of the rectangular main clearing zone; l is1-the width of the channel; l is2Width of the rectangular main clearing zone.
Detailed Description
The invention will be described in further detail with reference to the following drawings and specific embodiments:
as shown in fig. 1: the vertical section of the clarifying device (6) of the solution crystallizer (1) is composed of a right-angle trapezoidal inlet area (6-1), a rectangular main clarifying area (6-2) and a material discharging pipe (6-3). The crystallizer (1) and the clarification device (6) are both cylindrical, and the materials of the crystallizer and the clarification device are communicated. The top (6-4) of the clarifying device is level with the liquid level (3) in the crystallizer (1).
The width (L) of the rectangular main clarification zone (6-2) of the clarification device (6)2) Calculated from 2 times the theoretical cross-sectional area determined by the settling velocity of the particles of the target particle size. The height of the rectangular main clarification zone (6-2) comprises an effective height (H)2) And epitaxial height (H)3). Effective height (H)1) From the central line (6-3-1) of the material discharging pipe (6-3), the material discharging pipe is downwards extended to the horizontal position corresponding to the joint of the rectangular main clarifying area (6-2) and the right-angle trapezoid inlet area (6-1), and the extension height (H)3) From the central line (6-3-1) of the material discharging pipe (6-3), the material discharging pipe is upward to the horizontal line of the top (6-4) of the clarifying device. Effective height (H) of rectangular main clarification zone (6-2)2) Is 40 times of the diameter of the material discharge pipe (6-3). The extension height (H) of the rectangular main clarifying zone (6-2)3) Is 150mm plus 0.5 times of the diameter of the material discharge pipe (6-3).
The right-angle trapezoid inlet area (6-1) of the clarifying device (6) is communicated with the width (L) of a channel of the crystallizer (1)1) Is the width (L) of the rectangular main clarification zone (6-2)2) 1/5, height (H) of right-angled trapezoidal inlet region (6-1)1) Is the width (L) of the rectangular main clarification zone (6-2)2) 6 times of the total weight of the powder.
The crystallization solution passes through an air zone (7) and a liquid level (3) of the crystallizer in sequence through a feeding pipe (4) and enters the crystallizer (1), crystal nucleation and growth are carried out under the action of a stirrer (2), a part of grown crystals are settled to a discharge pipe (5) of the crystallizer (1) through the action of gravity, and then are discharged, filtered and dried to obtain a crystal product, a part of crystal particles enter a clarifying device (6) along with the flow of fluid, the particles firstly enter a right-angle trapezoid inlet zone (6-1), the particles with target granularity and above are settled by gravity in a rectangular main clarifying zone (6-2), and finer crystal particles are carried out by a material discharge pipe (6-3) along with the flow and enter a subsequent treatment link, so that the purpose of clarifying and grading of the crystal granularity is finished. The clarifying device (6) is communicated with the solution material in the crystallizer (1).
The method is characterized in that particles with the granularity of 50um in the crystallization process of the solution need to be clarified, the free settling velocity of the particles with the granularity is 0.00229m/s, the width of the required annular space of the rectangular main clarification zone is 75mm, and the diameter of the solution discharge port of the clarification zone of the crystallizer is 20 mm.
Aiming at the novel clarification structure of the solution crystallizer in the figure 1, the length of the upper bottom of the trapezoid inlet of the clarification area is 15mm, the length of the lower bottom is 75mm, and the height of the trapezoid is 450 mm. The width of the rectangular main clarification zone was 75mm, while the effective height of the clarification zone was 800mm and the extension height was 160 mm. The main purpose of the trapezoidal inlet region is to reduce the flow field disturbance of the agitation to the fining zone. The rectangular area 800mm long and 75mm wide is the main clear area of the particle. The main purpose of the design is to reduce the influence of the outflow of the solution in the clarification zone on the sedimentation of large-particle-size particles.
Claims (3)
1. A clarification device of a solution crystallizer is characterized in that a vertical section consists of a right-angle trapezoid inlet area, a rectangular main clarification area and a material discharge pipe, wherein the rectangular main clarification area is arranged above the right-angle trapezoid inlet area; the crystallizer and the clarification device thereof are cylindrical; the top position of the clarifying device is arranged to be flush with the liquid level position in the crystallizer.
2. The apparatus of claim 1, wherein the width of the rectangular main clarification zone of the clarification device is determined by 2 times the calculated cross-sectional area of particle sedimentation theory; the height of the rectangular main clarifying zone comprises the effective height and the epitaxial height; the effective height is calculated from the central line of the material discharging pipe, and is downwards until the horizontal position corresponding to the joint of the rectangular main clarifying area and the right-angled trapezoid inlet area, and the extension height is calculated from the central line of the material discharging pipe, and is upwards until the horizontal line at the top of the clarifying device; the effective height of the rectangular main clarifying zone is 40 times of the diameter of the material discharge pipe; the extension height of the rectangular main clarification zone is 150mm +0.5 times the diameter of the material discharge pipe.
3. The apparatus of claim 1, wherein the channel width of the right-angle trapezoidal inlet area of the clarification device communicated with the crystallizer is 1/5 times the width of the rectangular main clarification area, and the height of the right-angle trapezoidal inlet area is 6 times the width of the rectangular main clarification area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920555121.0U CN210331728U (en) | 2019-04-22 | 2019-04-22 | Clarification device of solution crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920555121.0U CN210331728U (en) | 2019-04-22 | 2019-04-22 | Clarification device of solution crystallizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210331728U true CN210331728U (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920555121.0U Expired - Fee Related CN210331728U (en) | 2019-04-22 | 2019-04-22 | Clarification device of solution crystallizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210331728U (en) |
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2019
- 2019-04-22 CN CN201920555121.0U patent/CN210331728U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200417 |
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| CF01 | Termination of patent right due to non-payment of annual fee |