CN221071049U - System for utilize calcium magnesium concentrate preparation magnesium nitrate, gypsum - Google Patents
System for utilize calcium magnesium concentrate preparation magnesium nitrate, gypsum Download PDFInfo
- Publication number
- CN221071049U CN221071049U CN202322663077.4U CN202322663077U CN221071049U CN 221071049 U CN221071049 U CN 221071049U CN 202322663077 U CN202322663077 U CN 202322663077U CN 221071049 U CN221071049 U CN 221071049U
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- China
- Prior art keywords
- kettle
- filter
- magnesium
- decalcification
- neutralization
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- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 title claims abstract description 52
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 24
- 239000010440 gypsum Substances 0.000 title claims abstract description 24
- 239000012141 concentrate Substances 0.000 title abstract description 18
- 238000002360 preparation method Methods 0.000 title description 2
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 40
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims abstract description 30
- 238000002425 crystallisation Methods 0.000 claims abstract description 30
- 230000008025 crystallization Effects 0.000 claims abstract description 30
- 239000000706 filtrate Substances 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 17
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims abstract description 15
- 235000019341 magnesium sulphate Nutrition 0.000 claims abstract description 15
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 7
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000004090 dissolution Methods 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- 239000013049 sediment Substances 0.000 claims description 2
- 238000010129 solution processing Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000001704 evaporation Methods 0.000 description 6
- 239000012065 filter cake Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical class [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The utility model relates to the technical field of calcium-magnesium concentrated solution processing systems, in particular to a system for preparing magnesium nitrate and gypsum by using calcium-magnesium concentrated solution. The utility model discloses a system for preparing magnesium nitrate and gypsum by utilizing calcium-magnesium concentrate, which comprises a neutralization kettle, a first filter, a decalcification kettle, a second filter and a concentrated crystallization kettle which are connected through pipelines; the neutralization kettle is used for carrying out neutralization reaction on the calcium-magnesium concentrated solution and the crude magnesium oxide; the first filter is used for filtering the neutralization feed liquid in the neutralization reaction; the decalcification kettle is used for filtering the first filtrate and the magnesium sulfate solution from the first filter; the second filter is used for filtering the decalcified liquid after decalcification treatment. The system of the utility model can efficiently produce magnesium nitrate and gypsum by using the neutralization kettle, the first filter, the decalcification kettle, the second filter and the concentrating crystallization kettle to treat the calcium-magnesium concentrated solution.
Description
Technical Field
The utility model relates to the technical field of calcium-magnesium concentrated solution processing systems, in particular to a system for preparing magnesium nitrate and gypsum by using calcium-magnesium concentrated solution.
Background
In phosphorite and chemical fertilizer processing enterprises, chemical mineral separation byproducts (calcium-magnesium concentrated solution) contain calcium and magnesium ion compounds, and direct discharge of the calcium-magnesium concentrated solution can cause pollution and harm to the environment; for example:
Water pollution: the calcium-magnesium concentrate contains high-concentration ions, so that the ion concentration in the water body can be increased after the calcium-magnesium concentrate is discharged, the chemical property and ecological balance of the water body are affected, and the calcium-magnesium concentrate can be harmful to fish, plants, microorganisms and the like;
Ecological destruction: algae in the water body can be greatly propagated after the calcium-magnesium concentrate is discharged, so that the water body is anoxic and the aquatic organisms are damaged;
Waste of resources: the calcium-magnesium concentrate contains abundant mineral substances, and direct discharge can lead to resource waste, which is unfavorable for sustainable development.
In order to protect the environment and resources, the calcium-magnesium concentrate should be properly treated and recycled; it is reported that advanced process technologies such as ion exchange technology or membrane separation technology can be adopted to improve the purity and yield of the calcium-magnesium concentrate byproduct. However, the ion exchange technique and the membrane separation technique can improve the purity and yield of magnesium nitrate, but the equipment cost and the maintenance cost are high, and the production cost is increased.
For this purpose, it is necessary to provide a system for preparing magnesium nitrate and gypsum from calcium-magnesium concentrate.
Disclosure of utility model
In order to overcome the defects of the prior art, the system for preparing magnesium nitrate and gypsum by using the calcium-magnesium concentrated solution provided by the utility model can be used for efficiently producing magnesium nitrate and gypsum by treating the calcium-magnesium concentrated solution through the neutralization kettle, the first filter, the decalcification kettle, the second filter and the concentration crystallization kettle.
The technical scheme adopted for solving the technical problems is as follows:
A system for preparing magnesium nitrate and gypsum by using calcium-magnesium concentrate comprises a neutralization kettle, a first filter, a decalcification kettle, a second filter and a concentration crystallization kettle which are connected through pipelines;
The neutralization kettle is used for carrying out neutralization reaction on the calcium-magnesium concentrated solution and the crude magnesium oxide;
The first filter is used for filtering the neutralization feed liquid in the neutralization reaction;
The decalcification kettle is used for filtering the first filtrate and the magnesium sulfate solution from the first filter;
the second filter is used for filtering decalcified liquid after decalcification treatment;
The concentration crystallization kettle is used for receiving the second filtrate filtered by the second filter and concentrating and crystallizing the second filtrate.
Preferably, the decalcification tank is connected to the first dissolution tank.
More preferably, the first dissolution tank is used for providing a magnesium sulfate solution.
More preferably, the first dissolution tank is connected to a second filter.
More preferably, the first dissolution tank receives wash liquid from the second filter.
Preferably, the concentrated crystallization kettle is connected to a decalcification kettle.
Preferably, the second filter produces gypsum; and the concentration crystallization kettle produces magnesium nitrate sediment.
Preferably, the neutralization reaction is carried out at a temperature of 60-70 ℃.
Preferably, the decalcification reaction is carried out at a temperature of 60-70 ℃.
Preferably, the crystallization temperature of the concentration crystallization kettle is 30-35 ℃.
The beneficial effects of the utility model are as follows:
1. The system of the application can efficiently produce magnesium nitrate and gypsum by using the neutralization kettle, the first filter, the decalcification kettle, the second filter and the concentrating crystallization kettle to treat the calcium-magnesium concentrated solution.
2. The system adopts the steps of concentration and crystallization and fully utilizes the washing liquid, reduces the discharge of waste water and realizes the environment-friendly production. Meanwhile, by efficiently producing magnesium nitrate and gypsum, the comprehensive utilization of the calcium-magnesium concentrated solution is realized, and the treatment cost of the calcium-magnesium concentrated solution is reduced.
Drawings
The utility model will be further described with reference to the drawings and examples.
FIG. 1 is a schematic diagram of a system for preparing magnesium nitrate and gypsum by using calcium-magnesium concentrate according to the application;
FIG. 2 is a schematic flow diagram of the product of the system for preparing magnesium nitrate and gypsum from calcium magnesium concentrate according to the present application;
In the figure: 1. a neutralization kettle; 2. a first filter; 3. a decalcification kettle; 4. a second filter; 5. concentrating and crystallizing the kettle; 6. a first dissolution tank.
Detailed Description
The utility model will be further illustrated by the following examples, which are not intended to limit the scope of the utility model, in order to facilitate the understanding of those skilled in the art.
As used herein, "and/or" includes any and all combinations of one or more of the associated listed items. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
In order to reduce equipment cost, maintenance cost, environmental protection pressure and production cost and efficiently produce magnesium nitrate and gypsum, the application provides a system for preparing magnesium nitrate and gypsum by using calcium-magnesium concentrate, which is shown in fig. 1-2, and comprises a neutralization kettle 1, a first filter 2, a decalcification kettle 3, a second filter 4 and a concentration crystallization kettle 5 which are connected through pipelines;
The neutralization kettle 1 is used for carrying out neutralization reaction on the calcium magnesium concentrate and the crude magnesium oxide;
the first filter 2 is used for filtering the neutralization feed liquid in the neutralization reaction; after the first filter is filtered, washing the first filter cake by using washing water to obtain washing water and a first filter cake (neutralized slag); combining the washing water and the filtrate to obtain a first filtrate;
The decalcification kettle 3 is used for filtering the first filtrate and the magnesium sulfate solution from the first filter 2;
The second filter 4 is used for filtering the decalcified liquid after decalcification treatment; after the second filter is filtered, the second filter cake is washed by using washing water to obtain washing liquid and washed second filter cake (gypsum)
The concentrating and crystallizing kettle 5 is used for receiving the second filtrate filtered by the second filter 4 and concentrating and crystallizing the second filtrate.
Specifically, as shown in fig. 1, a discharge port of the neutralization kettle 1 is connected to a feed port of the first filter 2; the liquid outlet of the first filter 2 is connected to the feed inlet of the decalcification kettle 3; the discharge port of the decalcification kettle 3 is connected to the feed port of the second filter 4; the liquid outlet of the second filter 4 is connected to a concentrating crystallization kettle 5. All the devices are connected through pipelines and convey corresponding feed liquid.
In one embodiment, the decalcification tank 3 is connected to a first dissolution tank 6; one feed inlet of the concrete decalcification kettle 3 is connected to the discharge outlet of the first dissolution tank 6;
more specifically, the first dissolution tank 6 is used to provide a magnesium sulfate solution. The magnesium sulfate solid is dissolved in a first dissolution tank to form a magnesium sulfate solution, and then the magnesium sulfate solution is led into a decalcification kettle 3, and decalcification reaction is carried out on the magnesium sulfate solution and the first filtrate in the decalcification kettle.
More specifically, the first dissolution tank 6 is connected to the second filter 4; a feed inlet of the first dissolving tank 6 is connected to a liquid outlet of the second filter 4; the first dissolution tank 6 receives the washing liquid from the second filter 4. The wash was used to dissolve the magnesium sulfate solids.
The neutralization kettle 1, the first filter 2, the decalcification kettle 3, the second filter 4, the concentrated crystallization kettle 5 and the first dissolution tank 6 are not specially designated, and the inventor can reasonably purchase or use according to the existing equipment to meet the requirements of corresponding production; for example, the first filter 2 may be a centrifuge, a plate frame filter; the neutralization kettle 1, the decalcification kettle 3 and the first dissolution tank 6 can be reaction kettles and reaction tanks.
In one embodiment, a concentrated crystallization kettle 5 is connected to the decalcification kettle 3. Specifically, a liquid outlet of the concentrating crystallization kettle 5 is connected to a feed inlet of the decalcification kettle 3.
In one embodiment, the neutralization tank 1 is subjected to a neutralization reaction at a temperature of 60 to 70 ℃. The reaction temperature of the calcium magnesium solution and the magnesium oxide is 60-70 ℃, and the reaction time can be adjusted according to specific conditions, for example, 1 hour, 2 hours or 3 hours; the reaction temperature can be 60 ℃, 61 ℃, 62 ℃, 63 ℃, 64 ℃, 65 ℃, 66 ℃, 67 ℃, 68 ℃, 69 ℃, 70 ℃ and 60-70 ℃.
In one embodiment, the decalcification kettle 3 is operated at a temperature of 60-70 ℃. I.e. the temperature of the reaction of the first filtrate with magnesium sulphate is 60-70 c, the reaction time may be adjusted according to the specific circumstances, for example 1 hour, 2 hours or 3 hours. The reaction temperature can be 60 ℃, 61 ℃, 62 ℃, 63 ℃, 64 ℃, 65 ℃, 66 ℃, 67 ℃, 68 ℃, 69 ℃, 70 ℃ and 60-70 ℃.
In one embodiment, the crystallization temperature of the concentrating crystallization kettle 5 is 30-35 ℃. The first filtrate is concentrated by evaporation at 80-90deg.C, 81, 82, 83, 84, 85, 88, 87, 88, 89, 90, and 80-90deg.C. Stopping evaporating and concentrating when the residual evaporating volume is 1/5-1/10 of the first filtrate volume; after the evaporation and concentration are finished, evaporating water and concentrated solution are obtained; the concentrated solution is crystallized at 30-35deg.C, and the evaporating temperature can be 30deg.C, 31deg.C, 32deg.C, 33deg.C, 35deg.C, and 30-35deg.C, and the crystallization time can be adjusted according to specific conditions, such as 1 hr, 2 hr or 3 hr. After the crystallization is finished, magnesium nitrate precipitate is obtained, the filtrate (mother liquor) and a magnesium nitrate filter cake are obtained by filtering and concentrating the filtrate.
As shown in fig. 2, the process of producing magnesium nitrate is as follows: neutralization kettle, first filter, decalcification kettle, second filter, concentrated crystallization kettle and magnesium nitrate; the specific process is as follows:
And (3) a neutralization kettle: and (3) carrying out neutralization reaction on the calcium magnesium concentrate and the crude magnesium oxide.
A first filter: and filtering the neutralized feed liquid after the neutralization reaction, and feeding the filtered first filtrate into a decalcification kettle.
Decalcification kettle: the first filtrate from the first filter and the magnesium sulfate solution were thoroughly mixed and decalcified.
A second filter: filtering the decalcified liquid, and allowing the filtered second filtrate to enter a concentration crystallization kettle;
concentrating and crystallizing kettle: and receiving the second filtrate filtered by the second filter, concentrating and crystallizing to obtain magnesium nitrate precipitate.
The gypsum is produced by the following steps: neutralization kettle, first filter, decalcification kettle, second filter and gypsum; the specific process is as follows:
And (3) a neutralization kettle: and (3) carrying out neutralization reaction on the calcium magnesium concentrate and the crude magnesium oxide.
A first filter: and filtering the neutralized feed liquid after the neutralization reaction, and feeding the filtered first filtrate into a decalcification kettle.
Decalcification kettle: the first filtrate from the first filter and the magnesium sulfate solution were thoroughly mixed and decalcified.
A second filter: filtering the decalcified liquid, and allowing the filtered second filtrate to enter a concentration crystallization kettle; and (5) producing a gypsum filter cake.
Therefore, the system of the application can efficiently produce magnesium nitrate and gypsum by treating the calcium-magnesium concentrated solution through the neutralization kettle, the first filter, the decalcification kettle, the second filter and the concentration crystallization kettle.
The above embodiments are preferred embodiments of the present utility model, and besides, the present utility model may be implemented in other ways, and any obvious substitution is within the scope of the present utility model without departing from the concept of the present utility model.
Claims (10)
1. The system for preparing magnesium nitrate and gypsum by using the calcium-magnesium concentrated solution is characterized by comprising a neutralization kettle (1), a first filter (2), a decalcification kettle (3), a second filter (4) and a concentrated crystallization kettle (5) which are connected through pipelines;
the neutralization kettle (1) is used for carrying out a neutralization reaction on the calcium magnesium concentrated solution and the crude magnesium oxide;
The first filter (2) is used for filtering the neutralization feed liquid in the neutralization reaction;
The decalcification kettle (3) is used for filtering the first filtrate and the magnesium sulfate solution from the first filter (2);
The second filter (4) is used for filtering decalcified liquid after decalcification treatment;
The concentrating crystallization kettle (5) is used for receiving the second filtrate filtered by the second filter (4) and concentrating and crystallizing the second filtrate.
2. The system according to claim 1, characterized in that the decalcification tank (3) is connected to a first dissolution tank (6).
3. The system according to claim 2, characterized in that the first dissolution tank (6) is used for providing a magnesium sulphate solution.
4. A system according to claim 3, characterized in that the first dissolution tank (6) is connected to a second filter (4).
5. A system according to claim 3, characterized in that the first dissolution tank (6) receives washing liquid from the second filter (4).
6. The system according to claim 1, characterized in that the concentrating crystallization kettle (5) is connected to a decalcification kettle (3).
7. The system according to claim 1, characterized in that the second filter (4) produces gypsum; and the concentration crystallization kettle (5) is used for producing magnesium nitrate sediment.
8. The system according to claim 1, characterized in that the neutralization reaction is carried out at a temperature of 60-70 ℃.
9. The system according to claim 1, characterized in that the decalcification kettle (3) is subjected to a decalcification reaction at a temperature of 60-70 ℃.
10. The system according to claim 1, characterized in that the crystallization temperature of the concentrated crystallization kettle (5) is 30-35 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322663077.4U CN221071049U (en) | 2023-09-28 | 2023-09-28 | System for utilize calcium magnesium concentrate preparation magnesium nitrate, gypsum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322663077.4U CN221071049U (en) | 2023-09-28 | 2023-09-28 | System for utilize calcium magnesium concentrate preparation magnesium nitrate, gypsum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221071049U true CN221071049U (en) | 2024-06-04 |
Family
ID=91273847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322663077.4U Active CN221071049U (en) | 2023-09-28 | 2023-09-28 | System for utilize calcium magnesium concentrate preparation magnesium nitrate, gypsum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221071049U (en) |
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2023
- 2023-09-28 CN CN202322663077.4U patent/CN221071049U/en active Active
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