CN214209482U - Potassium dihydrogen phosphate crystallization device of area stirring - Google Patents
Potassium dihydrogen phosphate crystallization device of area stirring Download PDFInfo
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- CN214209482U CN214209482U CN202023265189.7U CN202023265189U CN214209482U CN 214209482 U CN214209482 U CN 214209482U CN 202023265189 U CN202023265189 U CN 202023265189U CN 214209482 U CN214209482 U CN 214209482U
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Abstract
The utility model discloses a monopotassium phosphate crystallization device of area stirring relates to monopotassium phosphate crystallization equipment technical field. The crystallizer comprises a crystallizer body and an external cooler, wherein a vertical axial flow pump is arranged at the top of the crystallizer body, a water inlet pipe of the vertical axial flow pump is positioned in the crystallizer body, a water outlet pipe of the vertical axial flow pump is communicated with a liquid inlet of the external cooler, a liquid outlet of the external cooler is communicated with a liquid inlet at the bottom of the crystallizer body through a circulating header pipe, and a discharge port is arranged on the side wall of the crystallizer body; the crystallizer body top still is provided with the motor, and motor output shaft has the (mixing) shaft, and the (mixing) shaft is located the crystallizer originally internally, is provided with stirring paddle leaf along the axial on the (mixing) shaft. The liquid inlet and the supernatant liquid at the bottom of the crystallizer body are taken out from the top to form internal circulation in a crystallizer cavity, and then stirring is carried out to ensure that a crystallization bed layer is in a mixed flow state, so that the crystallization rate is greatly improved, and the stable formation of crystals is facilitated.
Description
Technical Field
The utility model relates to a monopotassium phosphate crystallization equipment technical field, concretely relates to monopotassium phosphate crystallization device of area stirring.
Background
The potassium dihydrogen phosphate is an important chemical and has wide application in the industries of agriculture, chemical industry, medicine, food and the like. The preparation of the potassium dihydrogen phosphate is mainly to obtain a potassium dihydrogen phosphate solution through chemical reaction of raw materials, and then to obtain a final product through the working procedures of concentration, crystallization, centrifugal separation, drying and the like of the solution, wherein the crystallization working procedure is a core working procedure. At present, potassium dihydrogen phosphate crystals are crystallized by an OSLO cooling crystallizer, clear liquid is taken out from the upper part of the crystallizer through a pump, and is cooled by an external circulating cooling device, and then is sent into a central downcomer at the top of the crystallizer, reaches the bottom of an inner cavity of the crystallizer along a central liquid inlet pipe, then rises from the bottom to pass through a fluidized crystallization bed layer, crystallization is carried out at the bottom to obtain crystals and clear liquid, the crystals sink to a settling zone due to gravity, and the clear liquid rises to enter the circulating cooling device again through the pump to be cooled. In the whole crystallization process, except for external cooling circulation, no circulation exists in the crystallizer, so that the crystallization rate is low, the particles are not uniform, the density of crystal layers is inconsistent, and the production efficiency and the consistency of the product quality are greatly influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a monopotassium phosphate crystallization device of area stirring solves current crystallization efficiency low, the inhomogeneous problem of crystal quality.
In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides a monopotassium phosphate crystallization device of area stirring which characterized in that: the crystallizer comprises a crystallizer body and an external cooler, wherein a vertical axial flow pump is arranged at the top of the crystallizer body, a water inlet pipe of the vertical axial flow pump is positioned in the crystallizer body, a water outlet pipe of the vertical axial flow pump is communicated with a liquid inlet of the external cooler, a liquid outlet of the external cooler is communicated with a liquid inlet at the bottom of the crystallizer body through a circulating header pipe, and a discharge port is arranged on the side wall of the crystallizer body; the crystallizer body top still is provided with the motor, and motor output shaft has the (mixing) shaft, and the (mixing) shaft is located the crystallizer originally internally, is provided with stirring paddle leaf along the axial on the (mixing) shaft.
The further technical scheme is that a flow guide device is arranged above a liquid inlet at the bottom of the crystallizer body, the flow guide device is a hollow shell formed by mutually connecting an upper flow guide plate and a lower flow guide plate, the lower flow guide plate is a conical shell with an opening at the top and gradually reduced from the top to the bottom, and the upper flow guide plate is formed by mutually connecting a conical surface at the upper part and an arc curved surface at the lower part.
The further technical proposal is that the stirring shaft is coaxially provided with a guide shell which is fixedly connected with the inner side wall of the crystallizer body through a connecting rod.
A liquid storage tank is arranged outside the crystallizer body, a liquid outlet of the liquid storage tank is sequentially connected with a centrifugal pump and a liquid supply pipe, and a liquid outlet of the liquid supply pipe is arranged in the guide cylinder.
The further technical proposal is that the outer side wall of the crystallizer body is provided with an observation port.
A further technical proposal is that the circulating main pipe is provided with an inspection manhole.
The working principle is as follows: the straight section clear liquid on the crystallizer body is pumped into an external cooler through a vertical axial flow pump, crystal slurry obtained after heat exchange and cooling with cooling water in the external cooler enters from the bottom of the crystallizer body through a circulation header pipe and slowly passes through a fluidized crystallization bed layer to obtain crystals, the original crystals are gradually grown up, the crystals are arranged in a grading way from bottom to top according to the granularity under the action of dead weight, the concentration of the crystal slurry is gradually reduced from bottom to top, the crystal slurry rises to a water inlet pipe of the vertical axial flow pump to become clear liquid, the clear liquid enters into circulation again, and the finished product is finally discharged from a discharge port. The stirring paddle continuously rotates in the crystallization bed layer to improve the growth speed of the crystal and ensure that the size of the crystal is more uniform. For further increasing the internal circulation, a guide shell is coaxially arranged on the stirring shaft, negative pressure is formed at the bottom of the guide shell through stirring, and thus top crystal slurry can flow into the guide shell to form the internal circulation, so that the crystallization efficiency is further improved. Meanwhile, concentrated solution is stored in the liquid storage tank and enters the top of the guide cylinder through the centrifugal pump and the liquid supply pipe, so that crystals are further formed, and the crystallization efficiency is improved.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the liquid inlet and the supernatant liquid at the bottom of the crystallizer body are taken out from the top to form internal circulation in a crystallizer cavity, and then stirring is carried out to ensure that a crystallization bed layer is in a mixed flow state, so that the crystallization rate is greatly improved, and the stable formation of crystals is facilitated.
2. The liquid coming from the bottom does not directly impact the crystals in the settling zone after being buffered by the flow guide device, so that the upper part and the lower part of the material at the liquid inlet are prevented from being in a turnover state, and the stability of the crystals is facilitated.
3. Through the draft tube, the magma acceleratedly flows in from the top of the draft tube during stirring to form internal circulation, and the crystallization rate is further improved.
4. The new concentrated solution is introduced into the crystallization body through the liquid storage tank, the centrifugal pump and the liquid supply pipe, so that the crystals are further formed, and the crystallization efficiency is further improved.
5. The crystallization condition in the crystallization body is observed through the observation port, and the crystallizer body is convenient for workers to overhaul, clean and maintain through the overhaul manhole.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the middle flow guiding device of the present invention.
In the figure: the method comprises the following steps of 1-a crystallizer body, 2-an external cooler, 3-a vertical axial flow pump, 4-a motor, 5-a stirring shaft, 6-a circulation header pipe, 7-a discharge port, 8-a flow guide device, 801-an upper flow guide plate, 802-a lower flow guide plate, 9-a flow guide cylinder, 10-a liquid storage tank, 11-a centrifugal pump, 12-a liquid supply pipe, 13-an observation port, 14-an inspection manhole, 15-a drain port and 16-a damping corrugated pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples
Fig. 1 shows a monopotassium phosphate crystallization device with stirring, which comprises a crystallizer body 1 and an external cooler 2, wherein a vertical axial-flow pump 3 is arranged at the top of the crystallizer body 1, a water inlet pipe of the vertical axial-flow pump 3 is positioned in the crystallizer body 1, and a water outlet pipe of the vertical axial-flow pump 3 is communicated with a liquid inlet of the external cooler 2. The number of the vertical axial flow pumps 3 may be 1 or more according to the capacity of the mold body 1. In order to ensure the cooling effect, an external cooler 2 is independently arranged on a water outlet pipe of each vertical axial-flow pump 3. All liquid outlets of the external cooler 2 are communicated with a circulation header pipe 6 and are finally communicated with a liquid inlet at the bottom of the crystallizer body 1 through the circulation header pipe 6. The outer side wall of the crystallizer body 1 is provided with a discharge outlet 7, and the discharge outlet 7 is also positioned at the lower part of the crystallization bed layer. The lowest part of the circulating main pipe 6 is provided with a drain port 15, so that liquid in the pipeline can be drained during maintenance. In order to reduce the influence of the internal vibration of the crystallizer body 1 on the circulation main pipe 6, a section of damping corrugated pipe 16 is arranged on the circulation main pipe 6. The circulation main pipe 6 is also provided with a service manhole 14. In order to observe the growth condition of the crystal, the outer side wall of the crystallizer body 1 is further provided with an observation port 13, and the observation port 13 is a three-layer visual window.
As shown in fig. 2, the flow guiding device 8 is a hollow shell formed by connecting an upper flow guiding plate 801 and a lower flow guiding plate 802, the lower flow guiding plate 801 is a conical shell with an open top and gradually reduced from top to bottom, and the upper flow guiding plate 801 is formed by connecting a conical surface at the upper part and an arc curved surface at the lower part. The outer side wall of the flow guide device 8 is fixed on the inner side wall of the crystallizer body 1 through a connecting rod.
The top of the crystallizer body 1 is provided with a motor 4, an output shaft of the motor 4 is connected with a stirring shaft 5, the stirring shaft 5 is positioned in the crystallizer body 1, and stirring blades are axially arranged on the stirring shaft 5. The stirring paddle leaf outside is provided with draft tube 9 with the (mixing) shaft 5 is coaxial, and draft tube 9 is the equal open-ended cavity casing in top and bottom, and 9 lateral walls of draft tube pass through connecting rod and 1 inside wall fixed connection of crystallizer body.
A liquid storage tank 10 is arranged outside the crystallizer body 1, a liquid outlet of the liquid storage tank 10 is sequentially connected with a centrifugal pump 11 and a liquid supply pipe 12, and a liquid outlet of the liquid supply pipe 12 is arranged in the guide cylinder 9.
During the use, straight section clear solution on crystallizer body 1 passes through vertical axial-flow pump 3 pump and gets into in the external cooler 2, the magma that obtains after the cooling water heat transfer in external cooler 2 gets into from crystallizer body 1 bottom through circulation house steward 6 to slowly pass fluidized crystallization bed and obtain the crystal, also make original crystal grow up gradually, the crystal is from up hierarchical arrangement down according to the granularity size under the dead weight effect, magma concentration also drops gradually from bottom to top, rises to vertical axial-flow pump 3 inlet tube department and has become the clear solution, the clear solution is the entering circulation once more, the finished product is discharged from bin outlet 7 at last. The liquid after heat exchange enters from the liquid inlet of the crystallizer body 1 and then slowly enters into the crystallizer after being buffered by the flow guide device 8, so that the upper part and the lower part of the material at the liquid inlet are prevented from being in a turnover state, and the stable formation of crystals is facilitated.
The stirring paddle in the inner cavity of the crystallizer body 1 continuously rotates in the crystallization bed layer to improve the growth speed of crystals and ensure that the sizes of the crystals are more uniform. In order to further increase the internal circulation, the guide shell 9 is coaxially arranged on the stirring shaft 5, the bottom of the guide shell 9 is stirred to form negative pressure, and thus the crystal slurry on the top can flow into the guide shell 9 to form the internal circulation, so that the crystallization efficiency is further improved. Meanwhile, the concentrated solution is stored in the liquid storage tank 10 and enters the top of the guide cylinder 9 through the centrifugal pump 11 and the liquid supply pipe 12, so that crystals are further formed, and the crystallization efficiency is improved.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More particularly, various variations and modifications are possible in the component parts and/or arrangements within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (6)
1. The utility model provides a monopotassium phosphate crystallization device of area stirring which characterized in that: the crystallizer comprises a crystallizer body (1) and an external cooler (2), wherein a vertical axial flow pump (3) is arranged at the top of the crystallizer body (1), a water inlet pipe of the vertical axial flow pump (3) is positioned in the crystallizer body (1), a water outlet pipe of the vertical axial flow pump (3) is communicated with a liquid inlet of the external cooler (2), a liquid outlet of the external cooler (2) is communicated with a liquid inlet at the bottom of the crystallizer body (1) through a circulation header pipe (6), and a discharge outlet (7) is formed in the side wall of the crystallizer body (1); the top of the crystallizer body (1) is also provided with a motor (4), an output shaft of the motor (4) is connected with a stirring shaft (5), the stirring shaft (5) is positioned in the crystallizer body (1), and stirring blades are axially arranged on the stirring shaft (5).
2. The potassium dihydrogen phosphate crystallization apparatus with stirring of claim 1, wherein: the crystallizer is characterized in that a flow guide device (8) is arranged above a liquid inlet in the bottom of the crystallizer body (1), the flow guide device (8) is a hollow shell formed by mutually connecting an upper flow guide plate (801) and a lower flow guide plate (802), the lower flow guide plate (802) is a conical shell with an opening at the top and gradually reduced from the top downwards, and the upper flow guide plate (801) is formed by mutually connecting a conical surface at the upper part and an arc curved surface at the lower part.
3. The potassium dihydrogen phosphate crystallization apparatus with stirring of claim 1, wherein: the stirring shaft (5) is coaxially provided with a guide shell (9), and the guide shell (9) is fixedly connected with the inner side wall of the crystallizer body (1) through a connecting rod.
4. The potassium dihydrogen phosphate crystallization apparatus with stirring of claim 3, wherein: a liquid storage tank (10) is arranged outside the crystallizer body (1), a liquid outlet of the liquid storage tank (10) is sequentially connected with a centrifugal pump (11) and a liquid supply pipe (12), and a liquid outlet of the liquid supply pipe (12) is arranged in the guide cylinder (9).
5. The potassium dihydrogen phosphate crystallization apparatus with stirring of claim 1, wherein: an observation port (13) is arranged on the outer side wall of the crystallizer body (1).
6. The potassium dihydrogen phosphate crystallization apparatus with stirring of claim 1, wherein: and an inspection manhole (14) is arranged on the circulating main pipe (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202023265189.7U CN214209482U (en) | 2020-12-30 | 2020-12-30 | Potassium dihydrogen phosphate crystallization device of area stirring |
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| CN202023265189.7U CN214209482U (en) | 2020-12-30 | 2020-12-30 | Potassium dihydrogen phosphate crystallization device of area stirring |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113975848A (en) * | 2021-11-01 | 2022-01-28 | 安徽相泉化工有限公司 | External continuous cooling crystallization system of cooler |
| CN116139528A (en) * | 2023-01-29 | 2023-05-23 | 江苏格兰特干燥浓缩设备有限公司 | Oslo cooling crystallizer capable of preventing crystal scale and application method thereof |
-
2020
- 2020-12-30 CN CN202023265189.7U patent/CN214209482U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113975848A (en) * | 2021-11-01 | 2022-01-28 | 安徽相泉化工有限公司 | External continuous cooling crystallization system of cooler |
| CN116139528A (en) * | 2023-01-29 | 2023-05-23 | 江苏格兰特干燥浓缩设备有限公司 | Oslo cooling crystallizer capable of preventing crystal scale and application method thereof |
| CN116139528B (en) * | 2023-01-29 | 2023-09-22 | 江苏格兰特干燥浓缩设备有限公司 | Oslo cooling crystallizer capable of preventing crystal scale and application method thereof |
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