CN212374978U - Magnesium ammonium phosphate reactor - Google Patents
Magnesium ammonium phosphate reactor Download PDFInfo
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- CN212374978U CN212374978U CN202020545283.9U CN202020545283U CN212374978U CN 212374978 U CN212374978 U CN 212374978U CN 202020545283 U CN202020545283 U CN 202020545283U CN 212374978 U CN212374978 U CN 212374978U
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Abstract
The utility model discloses a magnesium ammonium phosphate reactor, including the casing and arrange reaction guiding device and solid-liquid separation equipment in it in, wherein: the reaction flow guide device is provided with a flow guide cylinder arranged in the middle of the shell in the vertical direction and a lifting stirrer arranged in the flow guide cylinder; the solid-liquid separation device comprises a slag blocking cylinder fixed above the outer side of the guide cylinder, a primary solid-liquid separator, a secondary solid-liquid separator and a crystal collecting tank, wherein the primary solid-liquid separator, the secondary solid-liquid separator and the crystal collecting tank are arranged at the bottom of the slag blocking cylinder from top to bottom; the draft tube bottom is fixed with the pencil that adds, and the inlet tube is arranged to the bottom of adding the pencil, and waste water supplies with waste water from the bottom that the inlet tube got into the promotion formula agitator, waste water and the medicament direct mixing who jets from adding the pencil. The reaction equipment of the utility model has high medicament utilization rate, high precipitation efficiency, high mass transfer efficiency and strong impact resistance load capacity, can quickly and efficiently treat the wastewater containing phosphate, ammonium salt and magnesium salt with higher concentration, and has long service life and less energy consumption.
Description
Technical Field
The utility model relates to a sewage treatment device technical field especially relates to a magnesium ammonium phosphate reactor.
Background
The hazardous waste landfill wastewater mainly comes from the washing of transport vehicles and containers, the washing of temporary storage depots, the drainage of materialization workshops, the field washing, landfill leachate, initial rainwater and the like, and because the landfill collects materials with complex components, the wastewater usually contains phosphate, ammonium salt and magnesium salt with higher concentration, and the composition proportion changes greatly, so that great difficulty is brought to the stable operation of a subsequent wastewater treatment system.
According to the basic principle of chemical reaction, when magnesium salt, phosphate and ammonium salt exist in the wastewater, chemical reaction can occur to generate magnesium ammonium phosphate crystal (namely MgNH)4PO4·6H2O), the main reaction process is as follows:
Mg2 ++NH4 ++PO4 3-+6H2O
MgNH4PO4·6H2O
currently, MAP crystallization technology has become a focus of research at home and abroad, and a pneumatic stirring type reactor (patent application No.: 200910157928. X), a mechanical stirring type reactor (patent application No.: 201920364488.4) and an enhanced separation mechanical stirring type reactor (patent application No.: 201910232535.4) have been developed at present. In the three reactors, wastewater and the added medicament are in one-time contact, so that the problems of poor mass transfer effect and low medicament utilization rate exist.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a magnesium ammonium phosphate reactor, which realizes the high-efficiency crystallization and separation of magnesium ammonium phosphate.
The utility model adopts the technical proposal that: an ammonium magnesium phosphate reactor, which comprises a shell, a reaction diversion device and a solid-liquid separation device, wherein the reaction diversion device and the solid-liquid separation device are arranged in the shell, and the reaction diversion device comprises:
the reaction flow guide device is provided with a flow guide cylinder arranged in the middle of the shell in the vertical direction and a lifting stirrer arranged in the flow guide cylinder;
the solid-liquid separation device comprises a slag blocking cylinder fixed above the outer side of the guide cylinder, a primary solid-liquid separator, a secondary solid-liquid separator and a crystal collecting tank, wherein the primary solid-liquid separator, the secondary solid-liquid separator and the crystal collecting tank are arranged at the bottom of the slag blocking cylinder from top to bottom;
the draft tube, the bottom is fixed with the pencil, arranges the inlet tube in the bottom of pencil, and waste water supplies with waste water from the bottom that the inlet tube got into the promotion formula agitator, waste water and the medicament direct mixing who jets from adding the pencil.
Further, the lift agitator is fixed at a top position of the housing by a driving motor, thereby achieving an upward mixing of the medicine and assisting the crystallization of the medicine.
Furthermore, the dosing pipe is of an annular dosing ring pipe structure, and dosing holes are formed in the inner side of the annular dosing ring pipe.
Furthermore, the number of the dosing holes of the dosing tube is 4-12, and the aperture is 1.5-3.0 mm.
Furthermore, a water collecting tank is arranged at the position, close to the inner wall, of the top of the shell, and the water collecting tank is located on the outer side of the slag stopping barrel.
Further, the secondary solid-liquid separator has a double-layer structure and can perform separation twice.
Further, the bottom of the crystal collecting tank is also connected with a sludge discharge pipe.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the medicament utilization rate is high: the utility model discloses inlet tube and annular dosing pipe all set up in the draft tube bottom, and waste water entering equipment mixes with the medicament promptly, under the effect of promotion formula agitator, along the inside and outside circulation flow of draft tube, makes medicament and waste water abundant, has improved the medicament utilization ratio.
2. The precipitation efficiency is high:
firstly, the utility model designs a two-stage solid-liquid separation system, the produced magnesium ammonium phosphate crystal is firstly separated in a first-stage solid-liquid separator, the wastewater enters a water collecting tank through the bottom of a slag trap and is discharged out of the system after being collected, and the crystal is deposited on the surface of the first-stage solid-liquid separator and then enters a second-stage solid-liquid separator for further separation;
② the application of induced crystallization technology. The induced crystallization technology is that granular solid matter is added into the precipitation reaction system to promote precipitation crystallization and fast precipitation. The effect of solid phase impurities to accelerate the appearance of crystal nuclei is actually an inducing effect, so the method is called an induced crystallization technology.
The utility model designs a flow velocity in the draft tube is higher, the formed magnesium ammonium phosphate crystal is sorted, the crystal with large grain size sinks to the second-stage solid-liquid separator for separation under the action of gravity because of large weight, and then enters a crystal collecting tank at the bottom; the crystals with smaller grain size move along with the water flow and are used as crystallization crystal nuclei, so that the crystallization rate is improved.
3. The mass transfer efficiency is high: the lifting stirrer has high mixing strength and long waste water flow, and improves the mass transfer efficiency invisibly.
4. Strong impact load resistance: when the quality of water of intaking changes, the water quality of traditional equipment play has great fluctuation, and the screening effect of this scheme utilization draft tube screens the crystal nucleus in reaction product, the change of velocity of flow in the accessible draft tube, the quantity of control crystal nucleus to the fluctuation of the quality of water of answering, the load capacity that appears stronger shock resistance.
The utility model discloses a magnesium ammonium phosphate reaction unit, the medicament utilization ratio is high, precipitation efficiency is high, mass transfer efficiency is high, shock resistance load capacity is strong, can handle the waste water that contains phosphate, ammonium salt and the magnesium salt of higher concentration fast high-efficiently to this magnesium ammonium phosphate reaction unit long service life, energy consumption is less, and the feature of environmental protection is good.
Drawings
FIG. 1 is a schematic diagram of a magnesium ammonium phosphate reactor;
wherein: 1-shell, 2-reaction guide device, 21-guide cylinder, 22-lifting stirrer, 23-driving motor; 3-a solid-liquid separation device, 31-a slag stopping cylinder, 32-a primary solid-liquid separator, 33-a secondary solid-liquid separator and 34-a crystal collecting tank; 4-a water collecting tank, 5-a water inlet pipe, 6-a mud discharging pipe and 7-a medicine feeding pipe.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the combination or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In addition, in the description process of the embodiment of the present invention, the position relationships of the devices such as "up", "down", "front", "back", "left", "right" in all the drawings all use fig. 1 as a standard.
As shown in fig. 1, a magnesium ammonium phosphate reactor comprises a shell 1, and a reaction diversion device 2 and a solid-liquid separation device 3 which are arranged in the shell, wherein:
the reaction diversion device 2 is provided with a diversion cylinder 21 arranged in the middle of the vertical direction of the shell and a lifting stirrer 22 arranged in the diversion cylinder 21, and the top of the lifting stirrer is fixed at the top of the shell or the position near the top by using a fixed bracket;
the solid-liquid separation device 3 comprises a slag blocking cylinder 31 fixed at the upper position outside the guide cylinder 21, a primary solid-liquid separator 32, a secondary solid-liquid separator 33 and a crystal collecting tank 34, wherein the primary solid-liquid separator 32, the secondary solid-liquid separator 33 and the crystal collecting tank 34 are arranged at the bottom of the slag blocking cylinder 31 from top to bottom, and the crystal collecting tank 34 is specifically fixed on the inner wall of the shell to realize collection;
draft tube 21, the bottom is fixed with medicine feed pipe 7, and inlet tube 5 is arranged to the bottom of medicine feed pipe 7, and waste water supplies with waste water from the bottom that the inlet tube got into promotion formula agitator 22, and waste water and the medicament direct mixing that erupts from in the medicine feed pipe further intensive mixing at the promotion in-process of promotion formula agitator.
In the above embodiment, it is also possible to fix the elevating agitator 22 at the top position of the housing 1 by the driving motor 23, thereby achieving the upward mixing of the medicine and assisting the crystallization of the medicine.
In the above embodiment, the dosing pipe 7 may also be an annular dosing ring pipe structure, and the inner side of the annular dosing ring pipe is provided with a dosing hole. The more preferable embodiment is that the number of the medicine feeding holes of the medicine feeding pipe 7 is 4-12, the hole diameter is 1.5-3.0 mm, and the medicine uniformly enters the inner side of the guide shell.
In the above embodiment, a water collecting tank 4 may be further disposed at the top of the housing 1 near the inner wall, and the water collecting tank 4 is located outside the slag stopping cylinder 31 for collecting the treated clean water. The secondary solid-liquid separator 33 is of a double-layer structure, and can be used for twice separation, so that disturbance of waste water to the crystallization collecting tank is prevented.
The utility model discloses a magnesium ammonium phosphate reaction unit is at the during operation, and waste water (including phosphate, magnesium salt or ammonium salt) gets into equipment in the inlet pipe of draft tube bottom, and the medicament (according to the proportion of phosphate, ammonium salt and magnesium salt in the waste water, suitably supplements ammonium salt, magnesium salt or phosphate, makes the proportion in the waste water be 1.05: 1.2: 1) gets into from annular dosing pipe, under the effect of promotion formula agitator, waste water and medicament intensive mixing take place chemical reaction and generate magnesium ammonium phosphate, and upward movement along the draft tube, get into the draft tube outside behind the draft tube top; and the cross section area of the overflowing section is increased outside the guide cylinder, the flow velocity is reduced to 0.5-0.8 m/s, the generated magnesium ammonium phosphate crystals are continuously gathered and grown up and are settled at the primary solid-liquid separator, the generated crystal particles flow back to the bottom of the guide cylinder, and the wastewater enters a crystal water collecting tank through the bottom of the slag baffle and then is discharged out of the system.
Because the lifting amount of the lifting type stirrer is large (the lifting amount is 5-8 times of the amount of wastewater, and the flow velocity in the guide cylinder is 1.6-2.0 m/s), a micro negative pressure is formed at the bottom of the stirrer, the wastewater at the bottom of the guide cylinder, magnesium ammonium phosphate crystals with small particle size and incompletely reacted medicaments enter the guide cylinder again under the action of the negative pressure, and the incompletely reacted medicaments are further reacted with the wastewater; the magnesium ammonium phosphate crystal with smaller grain size is used as a crystallization crystal nucleus to promote the deposition of the generated magnesium ammonium phosphate on the surface, and the crystallization rate is improved (namely, the crystallization induction principle). And the crystals gradually grow up, and when the particle size reaches a certain degree, the crystals sink into the secondary solid-liquid separator under the action of gravity, and after the crystals are settled and separated by the two solid-liquid separators, the crystals slide down from the staggered gaps of the two solid-liquid separators and collect in the crystal collecting tank at the bottom.
In the above embodiment, a sludge discharge pipe 6 may be further connected to the bottom of the crystal collecting tank 34 to discharge sludge.
The embodiment of the present invention discloses a preferred embodiment, but not limited thereto, and those skilled in the art can easily understand the spirit of the present invention according to the above embodiment, and make different extensions and changes, but do not depart from the spirit of the present invention, all of which are within the protection scope of the present invention.
Claims (7)
1. An ammonium magnesium phosphate reactor, which is characterized in that: comprises a shell (1), and a reaction diversion device (2) and a solid-liquid separation device (3) which are arranged in the shell, wherein:
the reaction guide device (2) is provided with a guide cylinder (21) arranged in the middle of the shell in the vertical direction and a lifting stirrer (22) arranged in the guide cylinder (21);
the solid-liquid separation device (3) comprises a slag blocking cylinder (31) fixed above the outer side of the guide cylinder (21), a primary solid-liquid separator (32), a secondary solid-liquid separator (33) and a crystal collecting tank (34), wherein the primary solid-liquid separator and the secondary solid-liquid separator are arranged at the bottom of the slag blocking cylinder (31) from top to bottom;
a chemical feeding pipe (7) is fixed at the bottom of the guide shell (21), a water inlet pipe (5) is arranged at the bottom of the chemical feeding pipe (7), and wastewater enters the bottom of the lifting stirrer (22) from the water inlet pipe and is supplied to the bottom.
2. The magnesium ammonium phosphate reactor of claim 1, wherein: the lifting stirrer (22) is fixed at the top position of the shell (1) through a driving motor (23).
3. The magnesium ammonium phosphate reactor of claim 1, wherein: the medicine feeding pipe (7) is of an annular medicine feeding ring pipe structure, and the inner side of the annular medicine feeding ring pipe is provided with a medicine feeding hole.
4. A magnesium ammonium phosphate reactor according to claim 3, characterized in that: the number of the medicine adding holes of the medicine adding pipe (7) is 4-12, and the hole diameter is 1.5-3.0 mm.
5. The magnesium ammonium phosphate reactor of claim 1, wherein: the top of the shell (1) is also provided with a water collecting tank (4) close to the inner wall, and the water collecting tank (4) is positioned outside the slag stopping cylinder (31).
6. The magnesium ammonium phosphate reactor of claim 1, wherein: the secondary solid-liquid separator (33) has a double-layer structure.
7. A magnesium ammonium phosphate reactor according to any of claims 1-6, characterized in that: the bottom of the crystal collecting tank (34) is also connected with a sludge discharge pipe (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020545283.9U CN212374978U (en) | 2020-04-14 | 2020-04-14 | Magnesium ammonium phosphate reactor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020545283.9U CN212374978U (en) | 2020-04-14 | 2020-04-14 | Magnesium ammonium phosphate reactor |
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| CN212374978U true CN212374978U (en) | 2021-01-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115231670A (en) * | 2022-07-21 | 2022-10-25 | 无锡海拓环保装备科技有限公司 | Axial convection circulation reaction device based on air flotation coagulation system |
| WO2024054123A1 (en) * | 2022-09-09 | 2024-03-14 | Aquafortus Technologies Limited | Crystallisation and water absorption apparatuses and methods of use therefor |
-
2020
- 2020-04-14 CN CN202020545283.9U patent/CN212374978U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115231670A (en) * | 2022-07-21 | 2022-10-25 | 无锡海拓环保装备科技有限公司 | Axial convection circulation reaction device based on air flotation coagulation system |
| CN115231670B (en) * | 2022-07-21 | 2023-06-13 | 无锡海拓环保装备科技有限公司 | Axial convection circulation reaction device based on air floatation coagulation system |
| WO2024054123A1 (en) * | 2022-09-09 | 2024-03-14 | Aquafortus Technologies Limited | Crystallisation and water absorption apparatuses and methods of use therefor |
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Address after: 210012 rooms 602, 603, 604 and 605, building 1, No. 32, Dazhou Road, Yuhuatai District, Nanjing City, Jiangsu Province Patentee after: Jiangsu Zhenyi Environmental Protection Technology Co.,Ltd. Address before: 210012 rooms 602, 603, 604 and 605, building 1, No. 32, Dazhou Road, Yuhuatai District, Nanjing City, Jiangsu Province Patentee before: JIANGSU ZHENYI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |