CN212504022U - Circulating potassium nitrate crystallization device - Google Patents
Circulating potassium nitrate crystallization device Download PDFInfo
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- CN212504022U CN212504022U CN202021080598.7U CN202021080598U CN212504022U CN 212504022 U CN212504022 U CN 212504022U CN 202021080598 U CN202021080598 U CN 202021080598U CN 212504022 U CN212504022 U CN 212504022U
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/02—Crystallisation from solutions
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D9/00—Nitrates of sodium, potassium or alkali metals in general
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D9/00—Nitrates of sodium, potassium or alkali metals in general
- C01D9/18—Preparation in the form of shaped products, e.g. granules
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- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses a circulating potassium nitrate crystallization device, including the crystallizer barrel, the overflow case, the circulating pipe, first circulating pump, heat exchanger, the center tube, the circulation is washed the pipe, in the middle of the crystallizer barrel is located to the center tube, on crystallizer barrel upper end lateral wall was located to the overflow case, the circulating pipe is with the overflow case in proper order, first circulating pump, heat exchanger, center tube sealing connection, the circulation is washed the pipe and is equipped with a plurality of, it sets up to be the circumference equipartition around crystallizer barrel lateral wall, the circulation is washed the pipe upper end and is radially inserted in the circular cone portion and sealing connection from circular cone portion middle part lateral wall, the circulation is washed the pipe lower extreme and is inserted down in the circular cone portion and sealing connection from lower circular cone portion lower part. The utility model adopts a mother liquor circulating continuous crystallization structure, which greatly improves the production efficiency; a plurality of circular flushing pipes which are uniformly distributed in the circumferential direction are adopted to enable the crystal liquid at the bottom of the crystallizer to rotate, so that crystal grains can be effectively prevented from being accumulated to block a discharging pipe, and smooth discharging is guaranteed.
Description
Technical Field
The utility model relates to a potassium nitrate preparation technical field, in particular to circulating potassium nitrate crystallization device.
Background
The potassium nitrate is colorless transparent white powder of rhombic or rhombic crystals, is easily soluble in water, insoluble in ethanol and not easy to deliquesce in air, and the product is a strong oxidant and can be combusted and exploded when contacting with organic matters. The potassium nitrate is widely used in agricultural markets, is a chlorine-free potassium and nitrogen compound fertilizer, has the total content of plant nutrients potassium and nitrogen of about 60 percent, and has good physicochemical properties. The potassium nitrate has the important functions of high fertilizer efficiency, easy absorption, promoting the early emergence of seedlings, increasing the tobacco yield and improving the tobacco quality when being applied to the tobacco. In the food industry, the compound is used as a color former, a color fixative, an antimicrobial agent and a preservative, and has the functions of color fixation and bacteriostasis in meat products due to the reduction of potassium nitrite by the action of bacteria, such as the use for salting meat and the preservation in lunch meat. It is used in medicine industry to produce penicillin potassium salt, rifampicin and other medicine.
Potassium nitrate is crystallized in turn by adopting single kettles in the preparation process, which belongs to an intermittent crystallization mode, and the equipment has low heat transfer efficiency, large occupied quantity, large investment, low production efficiency and difficult control of the particle size of the product.
The Oslo evaporating crystallizer is a mother liquid circulating continuous crystallizer, and the feed liquid is fed into circulating pipe, mixed with the mother liquid circulating inside the pipe and pumped to the heating chamber. The heated solution is evaporated in the evaporation chamber and reaches supersaturation, and enters the crystal fluidized bed below the evaporation chamber through the central tube. In the crystal fluidized bed, supersaturated solute in the solution is deposited on the surface of suspended particles, and crystals grow up. The crystal fluidized bed carries out hydraulic classification on the particles, large particles are below, small particles are above, and the crystallized product with uniform particle size is discharged from the bottom of the fluidized bed. The fine particles in the fluidized bed flow into the circulating pipe along with the mother liquor, and when the mother liquor is reheated, the fine crystals in the circulating pipe are dissolved. The oslo cooling crystallizer is configured by replacing the heating chamber of the oslo evaporation crystallizer with a cooling chamber and removing the evaporation chamber.
However, when the Oslo circulating cooling crystallizer is used for potassium nitrate crystallization, potassium nitrate solution is easy to precipitate in the crystallizer, so that potassium nitrate is not uniform after crystallization, the cooling crystallization speed of potassium nitrate is high, a discharge port is easy to block after crystallization, and discharge cannot be realized.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a circulating potassium nitrate crystallization device to solve the problem that the current auspicious land cooling crystallizer that proposes in the above-mentioned background art blockked up the discharge gate easily when being used for the potassium nitrate crystallization, the unable ejection of compact.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a circulating potassium nitrate crystallization device, its characterized in that includes crystallizer barrel, overflow case, circulating pipe, first circulating pump, heat exchanger, center tube, circulation washing pipe, crystallizer barrel upper end opening for the mother liquor is added, and this crystallizer barrel includes cylinder portion, circular cone portion, lower cylinder portion, convex bobbin base portion from last down in proper order, convex bobbin base portion is equipped with the discharging pipe, the center tube is located in the middle of the crystallizer barrel, and insert convex bobbin base portion upper end directly from crystallizer barrel upper end, the tip is established to the circular cone venturi tube that the pipe diameter progressively enlarges downwards at this center tube lower extreme, the overflow case is located on crystallizer barrel upper end lateral wall, and the inner chamber communicates with each other with crystallizer barrel inner chamber, and the bottom is equipped with the overflow mouth, first circulating pump and heat exchanger all locate the crystallizer barrel outside, the circulating pipe is equipped with the multistage, The circulating flushing pipe is provided with a plurality of parts which are uniformly distributed around the outer side wall of the crystallizer barrel in a circumferential manner, the upper end of the circulating flushing pipe is radially inserted into the conical part from the outer side wall of the middle part of the conical part and is in sealing connection with the conical part, the lower end of the circulating flushing pipe is tangentially inserted into the lower cylindrical part from the circumference of the outer side wall of the lower part of the lower cylindrical part and is in sealing connection with the lower cylindrical part, and the second circulating pump is arranged in the middle of the circulating flushing pipe and is used for pumping out mother liquid in the conical part and then flushing the mother liquid into the lower cylindrical part from the tangential direction of the lower cylindrical part, so that the mother liquid at the lower end of the crystallizer barrel generates a rotating vortex.
Further, 8 circulating flushing pipes are arranged.
Furthermore, the diameter of the circulating washing pipe is set to be 80-100 mm.
Furthermore, the crystallizer cylinder, the overflow box, the central pipe, the circulating pipe and the circulating flushing pipe are all made of 316 stainless steel.
Further, the heat exchanger adopts a shell and tube heat exchanger.
Furthermore, the discharging pipe is provided with two parts, and is obliquely arranged at an angle of 30 degrees with the horizontal plane.
Furthermore, a plurality of first support rods which are uniformly distributed in the circumferential direction are arranged between the inner side wall of the upper cylindrical part and the outer side wall of the central tube, and a plurality of second support rods which are uniformly distributed in the circumferential direction are arranged between the inner side wall of the bottom of the circular arc-shaped tube and the outer side wall of the conical tube at the lower end of the central tube.
Furthermore, the motor of the first circulating pump adopts an adjustable motor, and the flow of the first circulating pump is adjusted by adjusting the rotating speed of the motor, so that the grain size of crystals in the circulating mother liquor and the grain discharging quantity of the discharging pipe are adjusted.
Compared with the prior art, the beneficial effects of the utility model are that: 1) the mother liquor circulating continuous crystallization structure is adopted, so that the potassium nitrate can be continuously crystallized and discharged, and the production efficiency is greatly improved; 2) the plurality of circulating flushing pipes which are uniformly distributed in the circumferential direction are adopted to enable the crystal liquid at the bottom of the crystallizer to rotate, so that the crystal grains can be effectively prevented from being accumulated to block a discharging pipe, and smooth discharging is ensured; 3) the bottom of the crystallizer cylinder is designed into an arc cylinder bottom, so that the flowing state of the crystal liquid in the crystallizer is improved, and dead zone accumulated crystal grains are prevented from being formed.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic top view of the embodiment of the present invention;
FIG. 3 is a schematic view of the distribution structure of the multi-person circulation washing pipe of the embodiment of the present invention;
in the figure: 1. the crystallizer comprises a crystallizer cylinder body, 101, an upper cylindrical part, 102, a conical part, 103, a lower cylindrical part, 104, an arc-shaped cylinder bottom, 105, a first supporting rod, 106, a second supporting rod, 107, a discharging pipe, 2, an overflow box, 201, an overflow port, 3, a first circulating pipe, 4, a first circulating pump, 5, a second circulating pipe, 6, a heat exchanger, 7, a third circulating pipe, 8, a central pipe, 9, a circulating flushing pipe, 901 and a second circulating pump.
Detailed Description
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
As shown in fig. 1 to 3, the embodiment of the present invention includes a crystallizer cylinder 1, an overflow tank 2, a circulation pipe, a first circulation pump 4, a heat exchanger 6, a central pipe 8, and a circulation wash pipe 9.
The crystallizer cylinder body 1 is provided with an opening at the upper end and used for adding mother liquor, the crystallizer cylinder body 1 sequentially comprises an upper cylindrical part 101, a conical part 102, a lower cylindrical part 103 and an arc-shaped cylinder bottom part 104 from top to bottom, a discharge pipe 107 is arranged at the arc-shaped cylinder bottom part 104, and the discharge pipe 107 is provided with two parts and obliquely arranged at an angle of 30 degrees with the horizontal plane.
The central tube 8 is arranged in the middle of the crystallizer cylinder body 1 and is directly inserted into the upper end of the circular arc-shaped tube bottom 104 from the upper end of the crystallizer cylinder body 1, the lower end part of the central tube 8 is provided with a conical tube with the tube diameter gradually expanding downwards, a plurality of first support rods 105 which are uniformly distributed in the circumferential direction are arranged between the inner side wall of the upper cylindrical part 101 and the outer side wall of the central tube 8, and a plurality of second support rods 106 which are uniformly distributed in the circumferential direction are arranged between the inner side wall of the circular arc-shaped tube.
The overflow box 2 is arranged on the outer side wall of the upper end of the crystallizer cylinder body 1, the inner cavity of the overflow box is communicated with the inner cavity of the crystallizer cylinder body 1, and the bottom of the overflow box is provided with an overflow port 201.
The first circulating pump 4 and the heat exchanger 6 are both arranged outside the crystallizer cylinder 1, the heat exchanger 6 is a tubular heat exchanger, the upper end of the tubular heat exchanger is provided with a water inlet, the lower end of the tubular heat exchanger is provided with a water outlet, mother liquor in the heat exchanger flows from bottom to top in the tubular heat exchanger, cold water flows from top to bottom outside the tubular heat exchanger, and cold and hot convection is carried out to quickly cool the mother liquor to reach a saturated potassium nitrate solution; the motor of the first circulating pump 4 adopts an adjustable motor, and the flow of the first circulating pump 4 is adjusted by adjusting the rotating speed of the motor, so that the crystal grain diameter in the circulating mother liquor and the grain discharging quantity of the discharging pipe are adjusted.
The circulating pipe is provided with a circulating pipe I3, a circulating pipe II 5, a circulating pipe III 7, an overflow tank 2, the circulating pipe I3, a first circulating pump 4, the circulating pipe II 5, a heat exchanger 6, the circulating pipe III 7 and a central pipe which are sequentially connected in a sealing manner.
The circulating flushing pipe 9 is provided with 8 parts which are circumferentially and uniformly distributed around the outer side wall of the crystallizer cylinder body 1, the upper end of the circulating flushing pipe 9 is radially inserted into the conical part 102 from the outer side wall of the middle part of the conical part 102 and is in sealing connection, the lower end of the circulating flushing pipe 9 is tangentially inserted into the lower cylindrical part 103 from the outer side wall of the lower part of the lower cylindrical part 103 and is in sealing connection, a second circulating pump 901 is further arranged in the middle of the circulating flushing pipe 9 and is used for pumping out the mother liquid in the conical part 102 and then flushing into the lower cylindrical part 103 from the tangential direction of the lower cylindrical part 103, so that the mother liquid at the lower end of the crystallizer cylinder body 1 generates a rotating vortex to drive the crystal grains at the arc.
Preferably, the diameter of the circulating washing pipe 9 is 80 to 100 mm.
Preferably, the crystallizer cylinder 1, the overflow tank 2, the central pipe 8, the circulating pipe I3, the circulating pipe II 5, the circulating pipe III 7 and the circulating flushing pipe 9 are all made of 316 stainless steel.
The utility model discloses a working method: mother liquor of 80 degrees is continuously added into the crystallizer cylinder body 1, when the liquid level of the mother liquor exceeds the height of an overflow port at the bottom of an overflow box 2, the mother liquor flows into a first circulating pipe 3 from the overflow port, a first circulating pump 4 is started, the mother liquor enters a heat exchanger 6, the mother liquor discharged from the heat exchanger 6 is cooled to below 35 degrees and then enters a central pipe 8, potassium nitrate crystal materials are separated out in the central pipe, finally, the mother liquor flows into the bottom of the arc-shaped cylinder from a pipe orifice of a conical pipe at the lower end of the central pipe 8 and is discharged from a discharge port, a plurality of second circulating pumps 901 are started, the mother liquor in the conical part 102 enters the lower cylindrical part from the circumferential tangential direction of the lower cylindrical part 103 through a circulating flushing pipe, the mother liquor at the lower end of the crystallizer cylinder body 1 generates rotating vortex, crystal grains at the bottom.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (8)
1. The utility model provides a circulating potassium nitrate crystallization device, its characterized in that includes crystallizer barrel, overflow case, circulating pipe, first circulating pump, heat exchanger, center tube, circulation washing pipe, crystallizer barrel upper end opening for the mother liquor is added, and this crystallizer barrel includes cylinder portion, circular cone portion, lower cylinder portion, convex bobbin base portion from last down in proper order, convex bobbin base portion is equipped with the discharging pipe, the center tube is located in the middle of the crystallizer barrel, and insert convex bobbin base portion upper end directly from crystallizer barrel upper end, the tip is established to the circular cone venturi tube that the pipe diameter progressively enlarges downwards at this center tube lower extreme, the overflow case is located on crystallizer barrel upper end lateral wall, and the inner chamber communicates with each other with crystallizer barrel inner chamber, and the bottom is equipped with the overflow mouth, first circulating pump and heat exchanger all locate the crystallizer barrel outside, the circulating pipe is equipped with the multistage, The circulating flushing pipe is provided with a plurality of parts which are uniformly distributed around the outer side wall of the crystallizer barrel in a circumferential manner, the upper end of the circulating flushing pipe is radially inserted into the conical part from the outer side wall of the middle part of the conical part and is in sealing connection with the conical part, the lower end of the circulating flushing pipe is tangentially inserted into the lower cylindrical part from the circumference of the outer side wall of the lower part of the lower cylindrical part and is in sealing connection with the lower cylindrical part, and the second circulating pump is arranged in the middle of the circulating flushing pipe and is used for pumping out mother liquid in the conical part and then flushing the mother liquid into the lower cylindrical part from the tangential direction of the lower cylindrical part, so that the mother liquid at the lower end of the crystallizer barrel generates a rotating vortex.
2. The circulating potassium nitrate crystallization device according to claim 1, characterized in that: the circulating washing pipe is provided with 8 pieces.
3. The circulating potassium nitrate crystallization device according to claim 1, characterized in that: the diameter of the circulating washing pipe is set to be 80-100 mm.
4. The circulating potassium nitrate crystallization device according to claim 1, characterized in that: the crystallizer cylinder, the overflow box, the central pipe, the circulating pipe and the circulating flushing pipe are all made of 316 stainless steel.
5. The circulating potassium nitrate crystallization device according to claim 1, characterized in that: the heat exchanger adopts a shell and tube heat exchanger.
6. The circulating potassium nitrate crystallization device according to claim 1, characterized in that: the discharging pipe is provided with two parts, and is obliquely arranged at an angle of 30 degrees with the horizontal plane.
7. The circulating potassium nitrate crystallization device according to claim 1, characterized in that: a plurality of first support rods which are uniformly distributed in the circumferential direction are arranged between the inner side wall of the upper cylindrical part and the outer side wall of the central tube, and a plurality of second support rods which are uniformly distributed in the circumferential direction are arranged between the inner side wall of the bottom of the circular arc-shaped tube and the outer side wall of the conical tube at the lower end of the central tube.
8. The circulating potassium nitrate crystallization device according to claim 1, characterized in that: the motor of the first circulating pump adopts an adjustable motor, and the flow of the first circulating pump is adjusted by adjusting the rotating speed of the motor, so that the crystal grain diameter in the circulating mother liquor and the grain discharging quantity of the discharging pipe are adjusted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021080598.7U CN212504022U (en) | 2020-06-12 | 2020-06-12 | Circulating potassium nitrate crystallization device |
| PCT/CN2020/123678 WO2021248774A1 (en) | 2020-06-12 | 2020-10-26 | Circulating type potassium nitrate crystallization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021080598.7U CN212504022U (en) | 2020-06-12 | 2020-06-12 | Circulating potassium nitrate crystallization device |
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| CN212504022U true CN212504022U (en) | 2021-02-09 |
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| CN202021080598.7U Active CN212504022U (en) | 2020-06-12 | 2020-06-12 | Circulating potassium nitrate crystallization device |
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| CN (1) | CN212504022U (en) |
| WO (1) | WO2021248774A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114275837A (en) * | 2021-12-28 | 2022-04-05 | 江苏卓生源环保科技有限公司 | Freezing crystallization processing system |
| CN117146483B (en) * | 2023-09-06 | 2024-03-26 | 内蒙古伊东集团东兴化工有限责任公司 | Heat exchange device and heat exchange method of denitration refrigerating unit by substituted membrane method |
| CN117299002B (en) * | 2023-11-29 | 2024-03-19 | 崇义绿冶新能源有限公司 | Lithium bicarbonate pyrolysis device for preparing lithium carbonate |
| CN117462989B (en) * | 2023-12-28 | 2024-03-01 | 山西铱倍力科技有限公司 | Crystallization equipment is used in chloroiridium acid production |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4288285A (en) * | 1980-07-28 | 1981-09-08 | Evaporator Technology Corporation | Apparatus for forming a vortex |
| NL1007846C2 (en) * | 1997-12-18 | 1999-06-21 | Niro Process Technology Bv | Method and device for the freeze concentration of substances. |
| CN103083947B (en) * | 2011-11-02 | 2015-01-07 | 上海远跃制药机械有限公司 | Light and heavy oil-water separator |
| CN105289037B (en) * | 2015-11-11 | 2016-04-27 | 广东鑫国泰科技有限公司 | Sodium Chlorate crystallization device |
| CN207493260U (en) * | 2017-10-18 | 2018-06-15 | 天津华景化工新技术开发有限公司 | A kind of crystallizer for nitrate production |
| CN108057258B (en) * | 2018-01-18 | 2023-08-18 | 江西金利达钾业有限责任公司 | Potassium nitrate spray crystallizer |
| CN108083299B (en) * | 2018-01-18 | 2023-07-28 | 江西金利达钾业有限责任公司 | Potassium nitrate crystallization production system |
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- 2020-06-12 CN CN202021080598.7U patent/CN212504022U/en active Active
- 2020-10-26 WO PCT/CN2020/123678 patent/WO2021248774A1/en active Application Filing
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| WO2021248774A1 (en) | 2021-12-16 |
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