CN219217859U - Efficient phosphogypsum processing system - Google Patents
Efficient phosphogypsum processing system Download PDFInfo
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- CN219217859U CN219217859U CN202223525007.4U CN202223525007U CN219217859U CN 219217859 U CN219217859 U CN 219217859U CN 202223525007 U CN202223525007 U CN 202223525007U CN 219217859 U CN219217859 U CN 219217859U
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- phosphogypsum
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model relates to phosphogypsum, and provides a high-efficiency phosphogypsum treatment system for improving the treatment efficiency of phosphogypsum, which comprises a phosphoric acid extraction system, a first treatment system connected with a waste discharge end of the phosphoric acid extraction system, and a second treatment system connected with the first treatment system; the waste outlet end of the phosphoric acid extraction system is connected with a second treatment system. The high-efficiency phosphogypsum treatment system provided by the utility model can treat phosphogypsum more efficiently and systematically, and has higher utilization rate of phosphogypsum.
Description
Technical Field
The utility model relates to the technical field of phosphogypsum, in particular to a high-efficiency phosphogypsum treatment system.
Background
Phosphogypsum mainly has two colors of gray black and gray white, the particle diameter is generally 5-50 mu m, and the content of crystal water is 20% -25%. Phosphogypsum is a solid waste generated in the wet-process phosphoric acid process, and the component of phosphogypsum is mainly calcium sulfate dihydrate. Phosphogypsum has complex composition, and besides calcium sulfate, phosphorus ore which is not completely decomposed, residual phosphoric acid, fluoride, acid insoluble substances, organic matters and the like, wherein the presence of fluorine and organic matters has the greatest influence on the recycling of phosphogypsum. The random discharge and accumulation of phosphogypsum seriously damages the ecological environment, not only pollutes the underground water resource, but also causes the waste of land resource.
In the existing treatment system, phosphogypsum is basically piled as waste, and the phosphogypsum is recycled when the phosphogypsum is needed to be used, but the recycling of the phosphogypsum is complicated, so that the economic benefit is low, and the utilization rate of the phosphogypsum is always kept; in addition, in the process of recycling phosphogypsum, the problems of pollutant emission and the like are also involved after phosphorus, fluorine, organic matters and the like in the phosphogypsum are removed, so that the common phosphogypsum recycling system cannot achieve higher utilization rate.
In conclusion, the phosphogypsum treatment system with higher phosphogypsum utilization rate is designed, so that the phosphogypsum problem can be better solved.
Disclosure of Invention
The utility model aims to provide an efficient phosphogypsum treatment system which can treat phosphogypsum more efficiently and systematically and has higher utilization rate of phosphogypsum.
The embodiment of the utility model is realized by the following technical scheme: the efficient phosphogypsum treatment system comprises a phosphoric acid extraction system, a first treatment system connected with a waste discharge end of the phosphoric acid extraction system, and a second treatment system connected with the first treatment system; and the waste outlet end of the phosphoric acid extraction system is connected with the second treatment system.
Further, the first treatment system includes a water wash device coupled to the phosphoric acid extraction system. The first treatment system further comprises a first mixing device connected with the discharging end of the washing device, and the discharging end of the first mixing device is connected with the feeding end of the second treatment system. The first treatment system is mainly used for removing impurities such as soluble phosphorus, eutectic phosphorus, fluorine, organic matters and the like in phosphogypsum, and the phosphogypsum is treated by combining a water washing and lime neutralization mode, but the treatment methods of the phosphogypsum are known in many ways, so that the first treatment system can also use the combined processes such as lime neutralization and ball milling, lime neutralization and flotation, lime neutralization and calcination, flotation and ball milling, acid leaching and water washing.
Further, the second treatment system comprises a second mixing device, and the feeding end of the second mixing device is connected with the discharging end of the first mixing device.
Further, the waste discharge end of the water washing device is connected with the feeding end of the second mixing device.
Further, the waste discharge end of the first mixing device is connected with the feed end of the second mixing device.
Further, the waste discharge end of the phosphoric acid extraction system is connected with the feed end of the second mixing device.
Further, the phosphoric acid extraction system comprises a plurality of raw material tanks, an extraction tank connected with the raw material tanks, and a phosphoric acid storage tank connected with the extraction tank; the waste discharge end of the extraction tank is connected with the first treatment system.
Further, the device also comprises a first storage tank connected with the discharging end of the first mixing device. The second storage tank is connected with the discharge end of the second mixing device.
The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects: the high-efficiency phosphogypsum treatment system provided by the utility model adopts a wet phosphoric acid production process (namely a phosphoric acid extraction system) to produce phosphoric acid, then the phosphogypsum after extraction is directly discharged into a first treatment system, and impurities such as soluble phosphorus, eutectic phosphorus, fluorine, organic matters and the like in the phosphogypsum are removed in the first treatment system, so that phosphogypsum treated by a pinch-squeeze steel pipe can be directly used in the field of construction, and then phosphogypsum can also be directly discharged into a second treatment system, and heavy metals in the phosphogypsum are treated in the second treatment system, so that the treated phosphogypsum can be applied to fertilizers in agricultural production, such as special fertilizers for saline-alkali soil improvement and special fertilizers for heavy metal passivation. The phosphogypsum processed by the first processing system can be discharged into the second processing system according to different requirements of finished products, so that the content of each element in the phosphogypsum can be regulated to a certain extent. Therefore, the system not only can efficiently treat phosphogypsum and reduce the accumulation of phosphogypsum, but also can fully utilize various components in phosphogypsum as a product instead of waste and byproducts when phosphoric acid is produced by a wet method, and can reduce the discharge of extra pollutants caused by treating phosphogypsum as much as possible.
Drawings
Fig. 1 is a schematic structural diagram of a high-efficiency phosphogypsum treatment system according to an embodiment of the present utility model.
Icon: 10-raw material tank, 11-extraction tank, 12-phosphoric acid storage tank, 21-water washing device, 22-first mixing device, 23-first storage tank, 31-second mixing device, 32-additive storage tank, 33-second storage tank.
Detailed Description
Examples
The phosphogypsum treatment system of this embodiment, as further described below with reference to the specific embodiments, includes a phosphoric acid extraction system, a first treatment system connected to a waste discharge end of the phosphoric acid extraction system, and a second treatment system connected to the first treatment system, as shown in fig. 1 (arrows in the figure indicate flow directions of materials); the waste outlet end of the phosphoric acid extraction system is connected with a second treatment system. Specifically, a wet phosphoric acid production process (namely a phosphoric acid extraction system) is used for producing phosphoric acid, then phosphogypsum after extraction is directly discharged into a first treatment system, and impurities such as soluble phosphorus, eutectic phosphorus, fluorine, organic matters and the like in the phosphogypsum are removed in the first treatment system, so that phosphogypsum after the treatment of the extruded steel pipe can be directly used in the field of construction, and then phosphogypsum can also be directly discharged into a second treatment system, and heavy metals in the phosphogypsum are treated in the second treatment system, so that the treated phosphogypsum can be applied to fertilizers in agricultural production, such as special fertilizers for saline-alkali soil improvement and special fertilizers for heavy metal passivation. The phosphogypsum processed by the first processing system can be discharged into the second processing system according to different requirements of finished products, so that the content of each element in the phosphogypsum can be regulated to a certain extent. Therefore, the system not only can efficiently treat phosphogypsum and reduce the accumulation of phosphogypsum, but also can fully utilize various components in phosphogypsum as a product instead of waste and byproducts when phosphoric acid is produced by a wet method, and can reduce the discharge of extra pollutants caused by treating phosphogypsum as much as possible.
The first treatment system in this embodiment comprises a water washing device 21 connected to the phosphoric acid extraction system. The first treatment system further comprises a first mixing device 22 connected to the discharge end of the washing device 21, the discharge end of the first mixing device 22 being connected to the feed end of the second treatment system. The first treatment system is mainly used for removing impurities such as soluble phosphorus, eutectic phosphorus, fluorine, organic matters and the like in phosphogypsum, and the phosphogypsum is treated by combining a water washing and lime neutralization mode, but the treatment methods of the phosphogypsum are known in many ways, so that the first treatment system can also use the combined processes such as lime neutralization and ball milling, lime neutralization and flotation, lime neutralization and calcination, flotation and ball milling, acid leaching and water washing. Thus, in this embodiment, the water washing device 21 washes out phosphorus, fluorine, organic matters, etc. in phosphogypsum, and then mixes them with lime in the first mixing device 22, and the lime converts the remaining impurities in phosphogypsum into precipitate and filters out the precipitate. So that the final phosphogypsum can reach the standard of building gypsum.
The second treatment system in this embodiment includes a second mixing device 31, and the feeding end of the second mixing device 31 is connected to the discharging end of the first mixing device 22. Specifically, phosphogypsum can be used as building gypsum after passing through the first treatment system, or part or all of phosphogypsum treated by the first treatment system can be discharged into the second treatment system for further treatment, so that the second mixing device 31 is mainly used for removing residual heavy metals in phosphogypsum, and in this embodiment, by adding kaolin, montmorillonite and the like into phosphogypsum (the kaolin can be stored in the additive storage tank 32 as additives), heavy metal ions in phosphogypsum can be chelated into the kaolin, the montmorillonite and the like, so that in-situ treatment of heavy metal ions is realized, and when the treated phosphogypsum can be used as fertilizer in agriculture, the heavy metal ions therein can be released therefrom at an extremely slow rate, and when the release rate of the heavy metals is slow enough, the phosphogypsum is not harmful to soil and crops. The phosphogypsum treated by the method has value of being directly applied to agricultural production, and no surplus waste is discharged in the process, so that no resource waste and no environmental pollution are generated.
The waste discharge end of the washing apparatus 21 in this embodiment is connected to the feed end of the second mixing apparatus 31. The reject outlet end of the first mixing device 22 is connected to the inlet end of the second mixing device 31. Specifically, the waste such as phosphorus, fluorine, organic matters and the like discharged after the treatment of the first treatment system can be directly discharged into the second mixing device 31 and used as agricultural fertilizer, so that the discharge of the waste can be reduced.
The waste discharge end of the phosphoric acid extraction system in this embodiment is connected to the feed end of the second mixing device 31. Specifically, phosphogypsum produced after phosphoric acid production can be directly discharged to the second mixing device 31 for treatment without passing through the first treatment system, because substances such as phosphorus, fluorine, aluminum, organic matters and the like contained in phosphogypsum are required by soil, and therefore, the phosphogypsum can be applied to agriculture only by removing heavy metal ions. While the amount of phosphogypsum discharged into the first treatment system and the second system can be adjusted according to the actual market demand. And waste materials treated by the first treatment system in different proportions can be added into the second mixing device 31 according to actual needs, so that the aim of blending the content of each element in phosphogypsum is fulfilled.
The phosphoric acid extraction system in this embodiment includes a plurality of raw material tanks 10, an extraction tank 11 connected to the raw material tanks 10, and a phosphoric acid storage tank 12 connected to the extraction tank 11; the waste discharge end of the extraction tank 11 is connected to a first treatment system. Specifically, the raw material tank 10 is mainly used for storing raw materials such as phosphorite, sulfuric acid, and the like.
In this embodiment, a first tank 23 is also included, which is connected to the discharge end of the first mixing device 22. And a second storage tank 33 connected to the discharge end of the second mixing device 31. Specifically, the first storage tank 23 is mainly used for storing phosphogypsum which can be used for construction after passing through the first treatment system, and the second storage tank 33 is used for storing phosphogypsum which can be used for agriculture after passing through the second treatment system.
The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects: the high-efficiency phosphogypsum treatment system provided by the utility model adopts a wet phosphoric acid production process (namely a phosphoric acid extraction system) to produce phosphoric acid, then the phosphogypsum after extraction is directly discharged into a first treatment system, and impurities such as soluble phosphorus, eutectic phosphorus, fluorine, organic matters and the like in the phosphogypsum are removed in the first treatment system, so that phosphogypsum treated by a pinch-squeeze steel pipe can be directly used in the field of construction, and then phosphogypsum can also be directly discharged into a second treatment system, and heavy metals in the phosphogypsum are treated in the second treatment system, so that the treated phosphogypsum can be applied to fertilizers in agricultural production, such as special fertilizers for saline-alkali soil improvement and special fertilizers for heavy metal passivation. The phosphogypsum processed by the first processing system can be discharged into the second processing system according to different requirements of finished products, so that the content of each element in the phosphogypsum can be regulated to a certain extent. Therefore, the system not only can efficiently treat phosphogypsum and reduce the accumulation of phosphogypsum, but also can fully utilize various components in phosphogypsum as a product instead of waste and byproducts when phosphoric acid is produced by a wet method, and can reduce the discharge of extra pollutants caused by treating phosphogypsum as much as possible.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. An efficient phosphogypsum treatment system, characterized in that: the device comprises a phosphoric acid extraction system, a first treatment system connected with a waste discharge end of the phosphoric acid extraction system, and a second treatment system connected with the first treatment system; the waste outlet end of the phosphoric acid extraction system is connected with the second treatment system;
the first treatment system comprises a water washing device connected with the phosphoric acid extraction system;
the first treatment system further comprises a first mixing device connected with the discharge end of the washing device, and the discharge end of the first mixing device is connected with the feed end of the second treatment system;
the second treatment system comprises a second mixing device, and the feeding end of the second mixing device is connected with the discharging end of the first mixing device.
2. The efficient phosphogypsum treatment system of claim 1, wherein: and the waste discharge end of the water washing device is connected with the feeding end of the second mixing device.
3. The efficient phosphogypsum treatment system of claim 1, wherein: the waste discharge end of the first mixing device is connected with the feed end of the second mixing device.
4. The efficient phosphogypsum treatment system of claim 1, wherein: and the waste discharge end of the phosphoric acid extraction system is connected with the feed end of the second mixing device.
5. The efficient phosphogypsum treatment system of claim 1, wherein: the phosphoric acid extraction system comprises a plurality of raw material tanks, an extraction tank connected with the raw material tanks, and a phosphoric acid storage tank connected with the extraction tank; the waste discharge end of the extraction tank is connected with the first treatment system.
6. The efficient phosphogypsum treatment system of claim 1, wherein: the device also comprises a first storage tank connected with the discharge end of the first mixing device.
7. The efficient phosphogypsum treatment system of claim 1, wherein: the second storage tank is connected with the discharge end of the second mixing device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223525007.4U CN219217859U (en) | 2022-12-28 | 2022-12-28 | Efficient phosphogypsum processing system |
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| CN202223525007.4U CN219217859U (en) | 2022-12-28 | 2022-12-28 | Efficient phosphogypsum processing system |
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