CN219156682U - Graded induction crystallization softening device - Google Patents
Graded induction crystallization softening device Download PDFInfo
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- CN219156682U CN219156682U CN202223426593.7U CN202223426593U CN219156682U CN 219156682 U CN219156682 U CN 219156682U CN 202223426593 U CN202223426593 U CN 202223426593U CN 219156682 U CN219156682 U CN 219156682U
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Abstract
The utility model provides a fractional induced crystallization softening device, which comprises a primary induced crystallization reaction zone and a secondary induced crystallization reaction zone, wherein the primary induced crystallization reaction zone and the secondary induced crystallization reaction zone are both arranged in a device body, the interior of the device body is hollow, and the upper end face of the primary induced crystallization reaction zone is communicated with the lower end face of the secondary induced crystallization reaction zone; a primary medicine feeding pipe and a primary seed crystal feeding pipeline, wherein a primary medicine distribution pipe is arranged in the primary induced crystallization reaction zone; the primary seed crystal feeding pipeline is positioned outside the device body and communicated with the primary induced crystallization reaction zone; the feeding pipe is positioned outside the device body and communicated with the primary crystallization induction reaction zone; the secondary medicine distribution pipe and the secondary medicine feeding pipe are positioned outside the device body and are communicated with the secondary induced crystallization reaction zone. The utility model can realize the fractional crystallization and softening of Mg and Ca in the same reactor, the added value of the obtained magnesium hydroxide particles is higher, and the calcium carbonate particles can be recycled as building materials; the occupied area of the equipment is small.
Description
Technical Field
The utility model relates to the technical field of crystallization softening, in particular to a fractional induction crystallization softening device.
Background
In the traditional chemical softening, an alkaline agent is directly added into a water body, and the purpose of removing hardness is achieved by generating a precipitate. The induced crystallization softening technology is a method of firstly adding a certain amount of seed crystals into water and forming precipitated crystals on the surface of the seed crystals through reactor design.
A chemical crystallization circulation granulation fluidized bed water treatment device (CN 105502692B) patent discloses a chemical crystallization circulation granulation fluidized bed water treatment device, which comprises a water distribution area, a medicine distribution area, a granulation area and a clear water area. The device can realize the circulation growth of precipitation particles in the water treatment process, and the particle discharge period is longer, and the water treatment effect is good. However, the precipitated particles obtained when the technology is used for treating Ca and Mg ion wastewater can not be recycled; the patent CN112875923A discloses a crystallization-induced stepwise softening method and system, which comprises a regulating tank, a primary granulating system, a heat exchange system, a secondary granulating system, a security filtering device and a wastewater decrement concentration system which are sequentially connected, wherein the primary granulating system and the secondary granulating system are circulating fluidized bed devices. The device is used for carrying out distributed softening on the high-magnesium desulfurization wastewater, firstly, calcium carbonate crystals are recovered, then, the high-magnesium desulfurization wastewater is heated by utilizing flue gas or waste steam in a factory, and the magnesium hydroxide crystals with higher commodity value are further softened. However, the system is complex, and has the defects of large equipment quantity and large occupied area.
Disclosure of Invention
Aiming at the problems, the utility model provides a fractional induction crystallization softening device which can realize fractional induction crystallization softening of Mg and Ca in the same reactor, realize separation and recycling recovery of softened precipitate particles, has small occupied area of equipment, and reduces equipment investment cost while realizing recycling of precipitate. The technical scheme adopted is as follows:
a fractional induction crystallization softening apparatus comprising:
the device comprises a first-stage crystallization induction reaction zone and a second-stage crystallization induction reaction zone, wherein the first-stage crystallization induction reaction zone and the second-stage crystallization induction reaction zone are arranged in a device body, the interior of the device body is hollow, and the upper end face of the first-stage crystallization induction reaction zone is communicated with the lower end face of the second-stage crystallization induction reaction zone;
the device comprises a first-stage medicine feeding pipe and a first-stage seed crystal feeding pipeline, wherein a first-stage medicine distribution pipe is arranged in a first-stage induced crystallization reaction zone, the first-stage medicine distribution pipe is fixed on the inner wall of the device body, the input end of the first-stage medicine distribution pipe is communicated with the output end of a first-stage connecting pipe, and the input end of the first-stage connecting pipe is connected with the first-stage medicine feeding pipe; the primary connecting pipe is fixed on the outer wall of the device body; the primary seed crystal feeding pipeline is positioned outside the device body and communicated with the primary induced crystallization reaction zone;
the feeding pipe is positioned outside the device body and communicated with the primary induced crystallization reaction zone;
the device comprises a device body, a secondary medicine distribution pipe and a secondary medicine feeding pipe, wherein the secondary medicine distribution pipe is fixed on the inner wall of the device body and is positioned in a secondary induced crystallization reaction zone; the secondary connecting pipe is fixed on the outer wall of the device body;
a secondary seed crystal feeding pipeline which is positioned outside the device body and communicated with the secondary induced crystallization reaction zone;
the secondary crystallization particle collecting tank is fixed on the inner wall of the device body and is positioned in the secondary crystallization induction reaction zone, the secondary crystallization particle collecting tank is positioned below the secondary medicine distribution pipe, the upper end face of the secondary crystallization particle collecting tank is open, the bottom face is communicated with a secondary crystallization particle discharging pipeline, and the output end of the secondary crystallization particle discharging pipe extends out of the device body.
Preferably, an inclined plate inner member is arranged in the secondary crystallization induction reaction zone, and the inclined plate inner member is fixed on the inner wall of the device body; the inclined plate inner member is positioned between the secondary medicine distribution pipe and the secondary crystallization particle collecting tank.
Preferably, the second-level medicine distribution pipe and the first-level medicine distribution pipe are provided with a plurality of medicine inlet holes.
Preferably, the upper end surface of the secondary crystallization induction reaction zone is communicated with an overflow weir.
Preferably, the first-level medicine distribution pipe, the medicine inlet pipe and the first-level seed crystal inlet pipe are sequentially arranged from bottom to top.
Preferably, the secondary medicine distribution pipe is positioned below the secondary seed crystal feeding pipeline.
Compared with the prior art, the utility model has the advantages that: the Mg and Ca fractional induction crystallization softening is realized in the same reactor through partition setting and reaction condition control, the added value of the obtained magnesium hydroxide particles is higher, and the calcium carbonate particles can be recycled as building materials.
Drawings
FIG. 1 is a block diagram of a fractional induction crystallization softening apparatus.
Wherein, 1-first order induced crystallization reaction zone, 2-second grade induced crystallization reaction zone, 3-swash plate internals, 4-second grade crystallization granule collecting vat, 5-overflow weir, 6-second grade cloth medicine pipe, 7-inlet pipe, 8-first order feed pipe, 9-first order seed crystal feed line, 10-second grade feed pipe, 11-second grade seed crystal feed line, 12-delivery port, 13-first order crystallization granule bin outlet, 14-second grade crystallization granule bin outlet.
Detailed Description
The present utility model will be described in more detail below with reference to the drawings, in which preferred embodiments of the utility model are shown, it being understood that one skilled in the art can modify the utility model described herein while still achieving the advantageous effects of the utility model. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the utility model.
As shown in fig. 1, a fractional induction crystallization softening apparatus includes: a primary crystallization-inducing reaction zone 1 and a secondary crystallization-inducing reaction zone 2.
The device comprises a primary crystallization-inducing reaction zone 1 and a secondary crystallization-inducing reaction zone 2, which are arranged in the device body, wherein the interior of the device body is hollow, and the upper end face of the primary crystallization-inducing reaction zone 1 is communicated with the lower end face of the secondary crystallization-inducing reaction zone 2.
The primary medicine distribution pipe, the medicine inlet pipe and the primary seed crystal inlet pipeline 9 are sequentially arranged from bottom to top.
A primary medicine distribution pipe is arranged in the primary induced crystallization reaction zone 1, the primary medicine distribution pipe is fixed on the inner wall of the device body, the input end of the primary medicine distribution pipe is communicated with the output end of a primary connecting pipe, and the input end of the primary connecting pipe is connected with the primary medicine inlet pipe 8; the primary connecting pipe is fixed on the outer wall of the device body; the primary seed crystal feeding pipeline 9 is positioned outside the device body and communicated with the primary induced crystallization reaction zone 1. One or more medicaments of lime, sodium hydroxide and ammonia water are added into the primary medicine feeding pipe 8, the pH value is regulated to 8-10, and Mg is realized 2+ Conversion to Mg (OH) 2 Crystallizing and precipitating, and discharging periodically after enrichment.
And a feeding pipe 7 which is positioned outside the device body and is communicated with the primary crystallization induction reaction zone 1.
The secondary medicine distribution pipe 6 and the secondary medicine feeding pipe 10 are arranged, the secondary medicine distribution pipe 6 is fixed on the inner wall of the device body and is positioned in the secondary induced crystallization reaction zone 2, the input end of the secondary medicine distribution pipe 6 is communicated with the output end of the secondary connecting pipe, and the input end of the secondary connecting pipe is connected with the secondary medicine feeding pipe 10; the second-level connecting pipe is fixed on the outer wall of the device body. The two-stage medicine distribution pipe 6 and the one-stage medicine distribution pipe are provided with a plurality of medicine inlet holes. One or more of sodium carbonate and sodium bicarbonate are added into the secondary medicine feeding pipe 10 to realize Ca 2+ Conversion to CaCO 3 Crystallizing and precipitating, and discharging periodically after enrichment.
A secondary seed crystal feeding pipeline 11 which is positioned outside the device body and is communicated with the secondary induced crystallization reaction zone 2; the secondary medicine distribution pipe 6 is positioned below the secondary seed crystal feeding pipeline 11.
The second-stage crystallization particle collecting tank 4 is fixed on the inner wall of the device body and is positioned in the second-stage induced crystallization reaction zone 2, the second-stage crystallization particle collecting tank 4 is positioned below the second-stage medicine distribution pipe 6, the upper end face of the second-stage crystallization particle collecting tank 4 is open, the bottom face is communicated with a second-stage crystallization particle discharging pipeline, and the output end of the second-stage crystallization particle discharging pipe extends out of the device body.
The secondary induced crystallization reaction zone 2 is internally provided with an inclined plate inner member 3, and the inclined plate inner member 3 is fixed on the inner wall of the device body; the inclined plate inner member 3 is positioned between the secondary medicine distribution pipe 6 and the secondary crystallization particle collecting tank 4. The upper end surface of the secondary induced crystallization reaction zone 2 is communicated with an overflow weir 5.
In the embodiment, the primary and secondary seed crystals are one or more of quartz sand and calcium carbonate, and the size of the seed crystals is 150-600 microns; the height of the primary induced crystallization region 1 is 1-5 times that of the secondary induced crystallization region 2.
The wastewater enters the primary induced crystallization reaction zone 1 through a feed pipe 7, a seed crystal, a primary seed crystal feed pipeline 9 and an alkaline agent through a primary medicine distribution pipe.
The reaction is carried out in the primary induced crystallization reaction zone 1, the continuous growth of magnesium hydroxide grains is realized by controlling the rising flow rate and the pH value, and the grains are discharged out of the system through the primary crystallization grain discharge port 13 after reaching a certain grain size.
The water discharged from the primary crystallization-inducing reaction zone 1 is directly risen to the secondary crystallization-inducing reaction zone 2, the seed crystal respectively enters the secondary crystallization-inducing reaction zone 2 through a secondary seed crystal feeding pipeline 11 and an alkaline agent through a secondary agent distribution pipe 6, the continuous growth of calcium carbonate crystal grains is realized by controlling the adding amount, and the crystal grains are periodically discharged out of the system through a secondary crystallization grain discharge port 13 after being collected through an inclined plate inner member 3 and a secondary crystallization grain collecting tank 4 after reaching a certain grain size.
The effluent in the second-stage induced crystallization reaction zone 2 is lifted and settled, and is discharged out of the system to the next treatment unit through the overflow weir 5 and the water outlet 12.
The working principle of the device is as follows:
after raw water firstly enters a primary induction crystallization zone 1, one or more medicaments of lime, sodium hydroxide and ammonia water are added into the primary induction crystallization zone 1, and the pH is regulated to 8-10 to realize Mg 2+ Conversion to Mg (OH) 2 Crystallization precipitation, the reaction formula is as follows:
Mg 2+ +OH - =Mg(OH) 2 ↓。
for alkalinity (HCO) 3 - ) Higher raw water is required to be added with acid, stirred and aerated to remove alkalinity in order to avoid simultaneous precipitation and crystallization of Ca and Mg in the primary partition.
And the magnesium hardness is fully removed through the primary induced crystallization zone 1, and the magnesium hardness is fully gravity settled and then is lifted to the secondary induced crystallization zone 2. At the moment, the pH in the water meets the requirement of calcium carbonate precipitation, and the calcium carbonate in the water is added with carbonate or bicarbonate to form calcium carbonate 2+ Reaction to convert into CaCO 3 Crystallization precipitation, the reaction formula is as follows:
HCO 3 - +OH - = CO 3 2- +H 2 O；
Ca 2+ +CO 3 2- = CaCO 3 ↓。
the Mg and Ca fractional induction crystallization softening is realized in the same reactor through partition setting and reaction condition control, the added value of the obtained magnesium hydroxide particles is higher, and the calcium carbonate particles can be recycled as building materials. The equipment occupies small area, the system is simple, and the investment cost of the equipment is reduced while the recycling of the sediment is realized.
The foregoing is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any person skilled in the art will make any equivalent substitution or modification to the technical solution and technical content disclosed in the utility model without departing from the scope of the technical solution of the utility model, and the technical solution of the utility model is not departing from the scope of the utility model.
Claims (6)
1. A fractional induction crystallization softening apparatus, comprising:
the device comprises a first-stage crystallization induction reaction zone and a second-stage crystallization induction reaction zone, wherein the first-stage crystallization induction reaction zone and the second-stage crystallization induction reaction zone are arranged in a device body, the interior of the device body is hollow, and the upper end face of the first-stage crystallization induction reaction zone is communicated with the lower end face of the second-stage crystallization induction reaction zone;
the device comprises a first-stage medicine feeding pipe and a first-stage seed crystal feeding pipeline, wherein a first-stage medicine distribution pipe is arranged in a first-stage induced crystallization reaction zone, the first-stage medicine distribution pipe is fixed on the inner wall of the device body, the input end of the first-stage medicine distribution pipe is communicated with the output end of a first-stage connecting pipe, and the input end of the first-stage connecting pipe is connected with the first-stage medicine feeding pipe; the primary connecting pipe is fixed on the outer wall of the device body; the primary seed crystal feeding pipeline is positioned outside the device body and communicated with the primary induced crystallization reaction zone;
the feeding pipe is positioned outside the device body and communicated with the primary induced crystallization reaction zone;
the device comprises a device body, a secondary medicine distribution pipe and a secondary medicine feeding pipe, wherein the secondary medicine distribution pipe is fixed on the inner wall of the device body and is positioned in a secondary induced crystallization reaction zone; the secondary connecting pipe is fixed on the outer wall of the device body;
a secondary seed crystal feeding pipeline which is positioned outside the device body and communicated with the secondary induced crystallization reaction zone;
the secondary crystallization particle collecting tank is fixed on the inner wall of the device body and is positioned in the secondary crystallization induction reaction zone, the secondary crystallization particle collecting tank is positioned below the secondary medicine distribution pipe, the upper end face of the secondary crystallization particle collecting tank is open, the bottom face is communicated with a secondary crystallization particle discharging pipeline, and the output end of the secondary crystallization particle discharging pipe extends out of the device body.
2. The apparatus according to claim 1, wherein an inclined plate inner member is provided in the secondary crystallization-inducing reaction zone, the inclined plate inner member being fixed to an inner wall of the apparatus body; the inclined plate inner member is positioned between the secondary medicine distribution pipe and the secondary crystallization particle collecting tank.
3. The fractional induction crystallization softening apparatus according to claim 1, wherein the secondary medicine distribution pipe and the primary medicine distribution pipe are provided with a plurality of medicine inlet holes.
4. The apparatus according to claim 1, wherein the upper end surface of the secondary crystallization-inducing reaction zone is connected to an overflow weir.
5. The apparatus according to claim 1, wherein the first-stage medicine distribution pipe, the medicine feeding pipe and the first-stage seed crystal feeding pipe are sequentially arranged from bottom to top.
6. The apparatus according to claim 1, wherein the secondary distribution pipe is located below the secondary seed crystal feed line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223426593.7U CN219156682U (en) | 2022-12-20 | 2022-12-20 | Graded induction crystallization softening device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223426593.7U CN219156682U (en) | 2022-12-20 | 2022-12-20 | Graded induction crystallization softening device |
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| Publication Number | Publication Date |
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| CN219156682U true CN219156682U (en) | 2023-06-09 |
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| CN202223426593.7U Active CN219156682U (en) | 2022-12-20 | 2022-12-20 | Graded induction crystallization softening device |
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