CN219440734U - Potassium dihydrogen phosphate continuous crystallization device - Google Patents
Potassium dihydrogen phosphate continuous crystallization device Download PDFInfo
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- CN219440734U CN219440734U CN202320564981.7U CN202320564981U CN219440734U CN 219440734 U CN219440734 U CN 219440734U CN 202320564981 U CN202320564981 U CN 202320564981U CN 219440734 U CN219440734 U CN 219440734U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model discloses a potassium dihydrogen phosphate continuous crystallization device, which relates to the technical field of potassium dihydrogen phosphate production devices, wherein an outlet of a raw material liquid storage tank is communicated with a concentrator through a pipeline, an outlet of the concentrator is communicated with a flash evaporator through a pipeline, a bottom material outlet of the flash evaporator is communicated with a crystallizer through a pipeline, a material outlet of the crystallizer is communicated with a centrifugal machine through a pipeline, a liquid phase outlet of the centrifugal machine is communicated with a mother liquid tank through a pipeline, and a solid phase outlet of the centrifugal machine is communicated with a finished product tank through a pipeline. The raw material liquid enters a concentrator to be concentrated to a proper concentration, then enters a flash evaporator to further improve the concentration, the time required by crystallization is shortened, meanwhile, the precipitation of crystals is more thorough, the yield is improved, meanwhile, the raw material liquid is cooled by the flash evaporator, the crystallization time is shortened, the process period is shortened, the water content of a product obtained after final centrifugation is low, in addition, the whole process adopts continuous operation, the productivity is high, and the consistency of the product quality is good.
Description
Technical Field
The utility model relates to the technical field of potassium dihydrogen phosphate production devices, in particular to a potassium dihydrogen phosphate continuous crystallization device.
Background
Potassium dihydrogen phosphate is a chemical product with wide application. Industrially used as a buffer and a culture agent; the food industry is used as a sour regulator; the compound fertilizer is widely suitable for various commercial crops, grains, melons, fruits, vegetables and the like, has a plurality of excellent effects of remarkably increasing yield and income, improving quality and quality, resisting lodging, preventing diseases and insect pests, preventing premature senility and the like, and has the effect of overcoming the defect of insufficient nutrition caused by the reduction of the aging and absorbing capacity of root systems in the later growth period of crops.
The production process of potassium dihydrogen phosphate generally comprises the procedures of concentration, crystallization, centrifugation, drying and the like, wherein the crystallization is a core procedure and directly relates to the quality of products. At present, intermittent cooling crystallization is adopted for potassium dihydrogen phosphate crystallization, and an intermittent crystallizer has the problems of long crystallization period, low productivity, large product quality difference among batches, fine crystallization particles, large moisture of centrifugal wet products and the like although the intermittent crystallizer has a simple structure and is convenient to operate.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: aiming at the defects existing in the prior art, the continuous crystallization device of potassium dihydrogen phosphate is provided, and has the advantages of short crystallization period, high productivity, stable product quality, large crystallization particles and low moisture of centrifugal wet products.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
the potassium dihydrogen phosphate continuous crystallization device comprises a raw material liquid storage tank, wherein an outlet of the raw material liquid storage tank is communicated with a concentrator through a pipeline, an outlet of the concentrator is communicated with a flash evaporator through a pipeline, a top gas phase outlet of the flash evaporator is communicated with a cooling system through a pipeline, and a gas phase outlet of the cooling system is communicated with a vacuum system through a pipeline;
the bottom material outlet of the flash evaporator is communicated with a crystallizer through a pipeline, the material outlet of the crystallizer is communicated with a centrifugal machine through a pipeline, the liquid phase outlet of the centrifugal machine is communicated with a mother liquid tank through a pipeline, and the solid phase outlet of the centrifugal machine is communicated with a finished product tank through a pipeline.
As an improved technical scheme, a flash evaporation circulating pump is arranged between the flash evaporator and the crystallizer, an inlet of the flash evaporation circulating pump is communicated to a bottom material outlet of the flash evaporator through a pipeline, and an outlet of the flash evaporation circulating pump is respectively communicated to upper material inlets of the flash evaporator and the crystallizer through pipelines.
As an improved technical scheme, the top of the crystallizer is communicated with a crystallization circulating pump through a pipeline, an outlet of the crystallization circulating pump is communicated with a cooler through a pipeline, and an outlet of the cooler is communicated to a material inlet of the crystallizer through a pipeline.
As an improved technical scheme, the cooler is a tube array cooler.
As an improved technical scheme, a static mixer is arranged between the cooler and the crystallizer, and the flash evaporation circulating pump and the outlet of the cooler are respectively communicated to the inlet of the static mixer through pipelines.
As an improved technical scheme, the mother liquor tank is communicated to the concentrator through a pipeline.
As a preferable technical scheme, the concentrator is a four-effect concentrator.
As a preferable technical scheme, the outlet of the raw material liquid storage tank is communicated with a feed pump through a pipeline, and the outlet of the feed pump is communicated to the inlet of the concentrator through a pipeline.
Due to the adoption of the technical scheme, the utility model has the beneficial effects that:
the utility model relates to a potassium dihydrogen phosphate continuous crystallization device, which comprises a raw material liquid storage tank, wherein an outlet of the raw material liquid storage tank is communicated with a concentrator through a pipeline, an outlet of the concentrator is communicated with a flash evaporator through a pipeline, a top gas phase outlet of the flash evaporator is communicated with a cooling system through a pipeline, and a gas phase outlet of the cooling system is communicated with a vacuum system through a pipeline; the bottom material outlet of the flash evaporator is communicated with a crystallizer through a pipeline, the material outlet of the crystallizer is communicated with a centrifugal machine through a pipeline, the liquid phase outlet of the centrifugal machine is communicated with a mother liquid tank through a pipeline, and the solid phase outlet of the centrifugal machine is communicated with a finished product tank through a pipeline. The raw material liquid enters a concentrator to be concentrated to a proper concentration, then enters a flash evaporator to further improve the concentration, the time required by crystallization is shortened, meanwhile, the precipitation of crystals is more thorough, the yield is improved, meanwhile, the raw material liquid is cooled by the flash evaporator, the crystallization time is shortened, the process period is shortened, the water content of a product obtained after final centrifugation is low, in addition, the whole process adopts continuous operation, the productivity is high, and the consistency of the product quality is good.
According to the utility model, a flash evaporation circulating pump is arranged between the flash evaporator and the crystallizer, an inlet of the flash evaporation circulating pump is communicated to a bottom material outlet of the flash evaporator through a pipeline, and outlets of the flash evaporation circulating pump are respectively communicated to upper material inlets of the flash evaporator and the crystallizer through pipelines. The circulation flow of materials in the flash evaporator can be accelerated through the flash evaporation circulating pump, the flash evaporation time is shortened, and the quality consistency of products is improved.
The top of the crystallizer is communicated with a crystallization circulating pump through a pipeline, an outlet of the crystallization circulating pump is communicated with a cooler through a pipeline, and an outlet of the cooler is communicated to a material inlet of the crystallizer through a pipeline. The crystallization circulating pump accelerates the circulating flow of the materials in the crystallizer, and simultaneously can realize the rapid cooling of the materials in the crystallizer by matching with the cooler, thereby shortening the crystallization time and improving the crystallization yield.
The cooler is a tube cooler, the operation temperature is low, the evaporation intensity is high, the heat exchange effect is good, and the precipitation of product crystals is facilitated.
And a static mixer is arranged between the cooler and the crystallizer, and the flash evaporation circulating pump and the outlet of the cooler are respectively communicated to the inlet of the static mixer through pipelines. The materials in the flash evaporator and the liquid materials in the crystallizer can be uniformly mixed through the static mixer and then enter the crystallizer together, the mixing effect of the materials in the crystallizer is good, and the quality consistency of the crystallized product is good.
The mother liquor tank is communicated to the concentrator through a pipeline. Mother liquor can be sleeved to the concentrator for recrystallization recovery, so that the yield of products is improved, and the waste of raw materials is reduced.
The concentrator is a four-effect concentrator, and the concentration effect is good.
The outlet of the raw material liquid storage tank is communicated with a feed pump through a pipeline, and the outlet of the feed pump is communicated to the inlet of the concentrator through a pipeline. The material in the raw material liquid storage tank is conveyed to the concentrator by the power provided by the feed pump, and the material flows in the concentrator more smoothly.
Drawings
The utility model will be further described with reference to the drawings and examples.
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
wherein: 1. a raw material liquid storage tank; 2. a concentrator; 3. a flash evaporator; 4. a vacuum system; 5. a cooling system; 6. a crystallizer; 7. a centrifuge; 8. a mother liquor tank; 9. a finished product tank; 10. a flash circulation pump; 11. a crystallization circulation pump; 12. a static mixer; 13. a feed pump; 14. a cooler.
Detailed Description
The utility model is further illustrated in the following, in conjunction with the accompanying drawings and examples.
As shown in figure 1, the potassium dihydrogen phosphate continuous crystallization device comprises a raw material liquid storage tank 1, wherein an outlet of the raw material liquid storage tank 1 is communicated with a concentrator 2 through a pipeline, an outlet of the concentrator 2 is communicated with a flash evaporator 3 through a pipeline, a top gas phase outlet of the flash evaporator 3 is communicated with a cooling system 5 through a pipeline, and a gas phase outlet of the cooling system 5 is communicated with a vacuum system 4 through a pipeline; the bottom material outlet of the flash evaporator 3 is communicated with a crystallizer 6 through a pipeline, the material outlet of the crystallizer 6 is communicated with a centrifugal machine 7 through a pipeline, the liquid phase outlet of the centrifugal machine 7 is communicated with a mother liquid tank 8 through a pipeline, and the solid phase outlet of the centrifugal machine 7 is communicated with a finished product tank 9 through a pipeline. The raw material liquid enters the concentrator 2 to be concentrated to a proper concentration, then enters the flash evaporator 3 to further improve the concentration, so that the time required by crystallization is shortened, meanwhile, the precipitation of crystals is more thorough, the yield is improved, meanwhile, the material liquid is cooled by the flash evaporator 3, the crystallization time is shortened, the process period is shortened, the water content of a product obtained after final centrifugation is low, in addition, the whole process adopts continuous operation, the productivity is high, and the consistency of the product quality is good.
A flash circulation pump 10 is arranged between the flash evaporator 3 and the crystallizer 6, an inlet of the flash circulation pump 10 is communicated to a bottom material outlet of the flash evaporator 3 through a pipeline, and an outlet of the flash circulation pump 10 is respectively communicated to upper material inlets of the flash evaporator 3 and the crystallizer 6 through pipelines. The circulation flow of the materials in the flash evaporator 3 can be accelerated through the flash circulation pump 10, the flash evaporation time is shortened, and the quality consistency of products is improved.
The top of the crystallizer 6 is communicated with a crystallization circulating pump 11 through a pipeline, the outlet of the crystallization circulating pump 11 is communicated with a cooler 14 through a pipeline, and the outlet of the cooler 14 is communicated with a material inlet of the crystallizer 6 through a pipeline. The crystallization circulating pump 11 accelerates the circulating flow of the materials in the crystallizer 6, and simultaneously can realize the rapid cooling of the materials in the crystallizer 6 by matching with the cooler 14, thereby shortening the crystallization time and improving the crystallization yield.
The cooler 14 is a tube-in-tube cooler, has low operating temperature, high evaporation strength and good heat exchange effect, and is convenient for precipitation of product crystals.
A static mixer 12 is arranged between the cooler 14 and the crystallizer 6, and the flash circulation pump 10 and the outlet of the cooler 14 are respectively communicated with the inlet of the static mixer 12 through pipelines. The materials in the flash evaporator 3 and the liquid materials in the crystallizer 6 can be uniformly mixed through the static mixer 12 and then enter the crystallizer 6 together, the mixing effect of the materials in the crystallizer 6 is good, and the quality consistency of the crystallized product is good.
The mother liquor tank 8 is connected to the concentrator 2 by a pipe. Mother liquor can be sleeved to the concentrator 2 for recrystallization recovery, so that the yield of products is improved, and the waste of raw materials is reduced.
The concentrator 2 is a four-effect concentrator 2, and the concentration effect is good.
The outlet of the raw material liquid storage tank 1 is communicated with a feed pump 13 through a pipeline, and the outlet of the feed pump 13 is communicated to the inlet of the concentrator 2 through a pipeline. The material in the raw material liquid storage tank 1 is conveyed to the concentrator 2 by the power provided by the feed pump 13, and the material flows in the concentrator 2 more smoothly.
The working principle of the utility model is as follows:
(1) The raw material liquid enters a four-effect concentrator 2 from a raw material liquid storage tank 1 through a feed pump 13 to be concentrated to a proper concentration, then enters a flash evaporator 3, is rapidly boiled and evaporated in a vacuum state, enters a cooling system 5 for cooling under the action of a vacuum system 4, and flows out from the bottom of the flash evaporator 3 after the temperature of the raw material liquid is reduced;
(2) The material liquid after flash evaporation and cooling enters from the upper part of the crystallizer 6, reaches the bottom of the crystallizer 6 along a middle guide pipe of the crystallizer 6, then rises from the gap between the bottom of the guide pipe and the bottom of the crystallizer 6, and the crystal grains grow gradually at the gap to form qualified crystals. Discharging crystals from a discharge hole at the bottom of the crystallizer 6, performing centrifugal separation, discharging separated mother liquor into a mother liquor tank 8, and feeding the products into a finished product tank 9; a crystallization circulating pump 11 is arranged at the top of the crystallizer 6, a part of crystallization clear liquid is pumped into an external cooler 14 for cooling, and cooled clear liquid enters an intermediate downcomer at the top of the crystallizer 6 and is mixed with the feed liquid after flash evaporation;
(3) Part of mother liquor in the mother liquor tank 8 returns to the four-effect concentrator 2, is mixed and concentrated with the raw material liquid, and enters the crystallization process again, and the other part is taken as liquid fertilizer for takeout.
It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present utility model, and such equivalents are intended to fall within the scope of the claims appended hereto.
Claims (8)
1. A potassium dihydrogen phosphate continuous crystallization device is characterized in that: the device comprises a raw material liquid storage tank, wherein an outlet of the raw material liquid storage tank is communicated with a concentrator through a pipeline, an outlet of the concentrator is communicated with a flash evaporator through a pipeline, a top gas phase outlet of the flash evaporator is communicated with a cooling system through a pipeline, and a gas phase outlet of the cooling system is communicated with a vacuum system through a pipeline;
the bottom material outlet of the flash evaporator is communicated with a crystallizer through a pipeline, the material outlet of the crystallizer is communicated with a centrifugal machine through a pipeline, the liquid phase outlet of the centrifugal machine is communicated with a mother liquid tank through a pipeline, and the solid phase outlet of the centrifugal machine is communicated with a finished product tank through a pipeline.
2. A potassium dihydrogen phosphate continuous crystallization apparatus as defined in claim 1, wherein: a flash evaporation circulating pump is arranged between the flash evaporator and the crystallizer, an inlet of the flash evaporation circulating pump is communicated to a bottom material outlet of the flash evaporator through a pipeline, and an outlet of the flash evaporation circulating pump is respectively communicated to upper material inlets of the flash evaporator and the crystallizer through pipelines.
3. A potassium dihydrogen phosphate continuous crystallization apparatus as defined in claim 2, wherein: the top of the crystallizer is communicated with a crystallization circulating pump through a pipeline, an outlet of the crystallization circulating pump is communicated with a cooler through a pipeline, and an outlet of the cooler is communicated to a material inlet of the crystallizer through a pipeline.
4. A potassium dihydrogen phosphate continuous crystallization apparatus as defined in claim 3, wherein: the cooler is a tube array cooler.
5. A potassium dihydrogen phosphate continuous crystallization apparatus as defined in claim 3, wherein: and a static mixer is arranged between the cooler and the crystallizer, and the flash evaporation circulating pump and the outlet of the cooler are respectively communicated to the inlet of the static mixer through pipelines.
6. A potassium dihydrogen phosphate continuous crystallization apparatus as defined in claim 1, wherein: the mother liquor tank is communicated to the concentrator through a pipeline.
7. A potassium dihydrogen phosphate continuous crystallization apparatus as defined in claim 1, wherein: the concentrator is a four-effect concentrator.
8. A potassium dihydrogen phosphate continuous crystallization apparatus as defined in claim 1, wherein: the outlet of the raw material liquid storage tank is communicated with a feed pump through a pipeline, and the outlet of the feed pump is communicated to the inlet of the concentrator through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320564981.7U CN219440734U (en) | 2023-03-18 | 2023-03-18 | Potassium dihydrogen phosphate continuous crystallization device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320564981.7U CN219440734U (en) | 2023-03-18 | 2023-03-18 | Potassium dihydrogen phosphate continuous crystallization device |
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| CN219440734U true CN219440734U (en) | 2023-08-01 |
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| CN202320564981.7U Active CN219440734U (en) | 2023-03-18 | 2023-03-18 | Potassium dihydrogen phosphate continuous crystallization device |
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- 2023-03-18 CN CN202320564981.7U patent/CN219440734U/en active Active
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