CN109761294B - Improved crystallizer suitable for high-salt wastewater fractional crystallization - Google Patents
Improved crystallizer suitable for high-salt wastewater fractional crystallization Download PDFInfo
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- CN109761294B CN109761294B CN201910071956.3A CN201910071956A CN109761294B CN 109761294 B CN109761294 B CN 109761294B CN 201910071956 A CN201910071956 A CN 201910071956A CN 109761294 B CN109761294 B CN 109761294B
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- 239000002351 wastewater Substances 0.000 title claims abstract description 24
- 238000001640 fractional crystallisation Methods 0.000 title claims abstract description 18
- 238000004062 sedimentation Methods 0.000 claims abstract description 34
- 238000002425 crystallisation Methods 0.000 claims description 16
- 230000008025 crystallization Effects 0.000 claims description 16
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000002245 particle Substances 0.000 abstract description 30
- 239000013078 crystal Substances 0.000 abstract description 20
- 239000012530 fluid Substances 0.000 abstract description 15
- 239000000463 material Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 238000005728 strengthening Methods 0.000 abstract description 7
- 238000010008 shearing Methods 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 4
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Peptides Or Proteins (AREA)
Abstract
The invention discloses an improved crystallizer suitable for high-salt wastewater fractional crystallization, which comprises an outer barrel, a guide cylinder and a guide baffle plate, wherein the guide cylinder and the guide baffle plate are arranged in the outer barrel, the guide baffle plate is arranged at the bottom of the outer barrel, and the guide cylinder and the guide baffle plate are both in arc-shaped design. The invention improves the structure of the traditional crystallizer, adopts the structural design of the arc-shaped guide cylinder, and enhances the shearing action of the flow field in the crystallizer based on the change of the sectional area of the fluid flow direction, thereby enhancing the material mixing in the crystallizer; meanwhile, a diversion baffle plate with an arc-shaped design is additionally arranged at the bottom of the crystallizer and used for strengthening the grading sedimentation of crystal particles, according to the particle sedimentation theory, fine crystal particles and fluid flow back into the diversion cylinder to continue to circulate until the fluid grows up, and coarse crystal particles are sedimentated into the bottom of the crystallizer, so that the size of a crystal particle product is guaranteed. The invention enhances the operation efficiency and fineness of the crystallizer by strengthening the fluid mixing and particle settling processes in the crystallizer.
Description
Technical Field
The invention relates to the technical field of crystallization separation, in particular to an improved crystallizer suitable for high-salt wastewater fractional crystallization.
Background
Crystallization is one of the most important unit operations in chemical separation engineering, is widely applied to industrial production processes, and particularly has higher requirements on separation crystallization technical equipment in recent years for development of near-zero discharge technology of high-salt wastewater in coal chemical industry.
The high-salt wastewater in the coal chemical industry is an inorganic-organic interaction system, and organic substances are often attached and entrained in the inorganic salt products recovered by fractional crystallization due to the existence of refractory organic pollutants, so that the quality of the products is difficult to ensure. The crystallizer is used as main equipment in the fractional crystallization process and is the most direct crystallization salt quality control platform. The inventor of the present application found that adequate material mixing and crystal growth are two important means for controlling entrainment of organic pollutants, and therefore, strengthening of the mixing process in a crystallizer and controlling of the crystal particle size are key to the water separation crystallization process of high-salt wastewater in coal chemical industry.
CN105597362a patent discloses a potassium salt industrial mechanical crystallizer, including crystallizer body, urceolus, draft tube, feed baffle, main agitating unit, bowl shape baffle and row material agitating unit, urceolus, draft tube, feed baffle, bowl shape baffle and crystallizer body fixed connection, main agitating unit, row material agitating unit pass through support and bearing and crystallizer body coupling, crystallizer body upper end is equipped with the mother liquor overflow mouth, and the bottom is equipped with the bin outlet, bowl shape baffle is located under the draft tube, and the bottom is middle high arch structure low all around, is equipped with the material communication hole all around the bottom. The invention can enlarge the granularity of raw material feed to 8mm, separate crystallization circulation slurry from crystallization product, effectively improve the quality concentration of circulation slurry and the treatment capacity of crystallizer, increase the granularity of crystallization product, reduce the entrainment rate of raw material in crystallization product, and obtain better crystallization effect. However, the guide cylinder and the bowl-shaped baffle in the crystallizer are only of common horn-shaped and bowl-shaped designs, and are similar to the guide cylinder and the baffle in the traditional crystallizer, the inner surfaces of the guide cylinder and the bowl-shaped baffle in the patent are linear, no velocity gradient exists in the flowing direction, and the problems of mixing reinforcement of materials and crystal particle size control are not completely solved.
According to the invention, through analysis of the flow field structure in the crystallizer, the structure of the crystallizer is improved and designed, so that the strengthening of the mixing process in the crystallizer and the grading control of crystal particles are realized, and the operation efficiency and the fineness of the crystallizer are improved.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the defects of the prior art, the structure of the crystallizer is reasonably designed, the flow field distribution in the crystallizer is optimized, the shearing and mixing effects in the crystallizer are enhanced, the grading control of crystal particles is realized according to the particle sedimentation theory, and the improved crystallizer suitable for the fractional crystallization of high-salt wastewater is provided, so that the operation efficiency and fineness of the crystallizer are improved.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides an improved generation crystallizer suitable for high salt waste water divides matter crystallization, includes urceolus and sets up guide cylinder and the guide baffle in the urceolus, the guide baffle set up the bottom of urceolus, guide cylinder with the guide baffle all adopt the arc design.
The invention improves the structure of the traditional crystallizer, adopts arc-shaped design for the guide cylinder and the guide baffle respectively, accords with the fluid mechanical property of solid-liquid two phases in the crystallizer, is beneficial to the development of a flow field in the crystallizer, and can further strengthen the fluid mixing and particle sedimentation processes in the crystallizer, thereby fully utilizing the multiphase flow characteristics in the crystallizer and improving the operation efficiency and fineness of the crystallizer.
The invention adopts the structural design of the arc-shaped guide cylinder, and enhances the shearing action of the flow field in the crystallizer based on the change of the sectional area of the fluid flow direction, thereby enhancing the mixing of materials in the crystallizer. In addition, a guide baffle plate with an arc-shaped design is additionally arranged at the bottom of the crystallizer and is used for strengthening the grading sedimentation of crystal particles. According to the particle sedimentation theory, fine crystal particles and fluid flow back into the guide cylinder under the action of the baffle plate to continue circulating until the fine crystal particles grow up, and coarse crystal particles enter the bottom of the crystallizer due to the sedimentation performance of the coarse crystal particles, so that the size of a crystallized particle product is ensured.
Preferably, the inner side surface of the guide cylinder is composed of a plurality of spherical cambered surfaces which are connected up and down in sequence.
Preferably, the inner side surface and the outer side surface of the guide cylinder are respectively formed by a plurality of spherical cambered surfaces which are sequentially connected up and down.
Further, the radian of the spherical arc corresponding to each spherical arc surface is 0.7-2.4.
Further, the maximum inner diameter of the guide cylinder is 0.15-0.45 times of the inner diameter of the outer cylinder.
Preferably, the flow guide baffle is a downward convex annular flow guide baffle, and the outer side surface of the flow guide baffle is tangent to the inner wall of the outer cylinder.
Further, the radian of the arc corresponding to the flow guide baffle is 1.0-2.8.
Further, the diameter of the inner ring of the flow guide baffle plate is 0.05-0.25 times of the inner diameter of the outer cylinder.
Preferably, the outer cylinder is provided with a feed inlet, an overflow port and a propeller, the propeller stretches into the guide cylinder, a baffle is sleeved on the outer side of the upper part of the guide cylinder, the bottom of the outer cylinder is connected with a reverse-cone-shaped sedimentation cylinder, the lower part of the guide cylinder stretches into the sedimentation cylinder, the baffle is communicated with the sedimentation cylinder through the guide cylinder, an annular mixing area is formed between the outer side surface of the baffle and the inner side surface of the outer cylinder in a surrounding manner, the mixing area is respectively communicated with the overflow port, the baffle and the sedimentation cylinder, the baffle is arranged on the lower part of the sedimentation cylinder, the baffle is positioned below the guide cylinder, the baffle and the lower part of the sedimentation cylinder are surrounded into a sedimentation area, and an ore discharge port is formed in the bottom of the sedimentation area. The crystallizer is only an application example of an improved crystallizer which is particularly provided with a guide cylinder and a guide baffle which are in arc-shaped design and is suitable for high-salt wastewater fractional crystallization. In practical application, the guide cylinder and the guide baffle which are arc-shaped can be applied to other traditional crystallizers to replace the corresponding guide cylinder and guide baffle.
Compared with the prior art, the invention has the advantages that: the improved crystallizer suitable for high-salt wastewater water separation crystallization disclosed by the invention is improved in the structure of a traditional crystallizer, adopts the structural design of an arc guide cylinder, and enhances the shearing action of a fluid field in the crystallizer based on the change of the sectional area of the fluid flow direction so as to further enhance the mixing of materials in the crystallizer; meanwhile, a diversion baffle plate with an arc-shaped design is additionally arranged at the bottom of the crystallizer and used for strengthening the grading sedimentation of crystal particles, according to the particle sedimentation theory, fine crystal particles and fluid flow back into the diversion cylinder to continue to circulate until the fluid grows up, and coarse crystal particles are sedimentated into the bottom of the crystallizer, so that the size of a crystal particle product is guaranteed. The invention enhances the operation efficiency and fineness of the crystallizer by strengthening the fluid mixing and particle settling processes in the crystallizer.
Drawings
FIG. 1 is a schematic structural diagram of an improved crystallizer suitable for fractional crystallization of high-salt wastewater in an embodiment.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
The improved crystallizer for high-salt wastewater fractional crystallization in embodiment 1, as shown in fig. 1, comprises an outer barrel 1, a guide barrel 2 and a guide baffle 3, wherein the guide barrel 2 and the guide baffle 3 are arranged in the outer barrel 1, the guide baffle 3 is arranged at the bottom of the outer barrel 1, the guide barrel 2 and the guide baffle 3 are all in arc-shaped design, and the inner side surface of the guide barrel 2 is composed of a plurality of spherical cambered surfaces 21 which are sequentially connected up and down. The flow guide baffle plate 3 is a downward convex annular flow guide baffle plate 3, and the outer side surface of the flow guide baffle plate 3 is tangent with the inner wall of the outer cylinder 1.
The difference between the improved crystallizer for high-salt wastewater fractional crystallization of embodiment 2 and embodiment 1 is that in embodiment 2, the radian of the spherical arc corresponding to each spherical arc 21 is 0.7-2.4,
The modified crystallizer for high-salt wastewater water-splitting crystallization of example 3 is different from example 2 in that in example 3, the maximum inner diameter of the guide cylinder 2 is 0.15 to 0.45 times the inner diameter of the outer cylinder 1.
The difference between the improved crystallizer for high-salt wastewater water separation crystallization in embodiment 4 and embodiment 3 is that in embodiment 4, the baffle 3 is a downward convex annular baffle 3, the outer side surface of the baffle 3 is tangent to the inner wall of the outer barrel 1, and the arc of the arc corresponding to the baffle 3 is 1.0-2.8.
The difference between the improved crystallizer for high-salt wastewater water-splitting crystallization of embodiment 5 and embodiment 4 is that in embodiment 5, the diameter of the inner ring of the guide baffle 3 is 0.05-0.25 times of the inner diameter of the outer cylinder 1.
Example 6 is an example of an improved crystallizer application for high salt wastewater fractional crystallization, specifically using a guide cylinder 2 and a guide baffle 3 in arc design. As shown in fig. 1, the improved crystallizer comprises an outer cylinder 1, a guide cylinder 2 and a guide baffle 3, wherein the guide cylinder 2 and the guide baffle 3 are arranged in the outer cylinder 1, the guide baffle 3 is arranged at the bottom of the outer cylinder 1, the guide cylinder 2 and the guide baffle 3 are both in arc-shaped design, and the inner side surface of the guide cylinder 2 is composed of a plurality of spherical cambered surfaces 21 which are sequentially connected up and down; the outer cylinder 1 is provided with a feed port (not shown in the figure), an overflow port 4 and a propeller 5, the propeller 5 stretches into the guide cylinder 2, a baffle cylinder 6 is sleeved on the outer side of the upper part of the guide cylinder 2, the bottom of the outer cylinder 1 is connected with an inverted cone-shaped sedimentation cylinder 7, the lower part of the guide cylinder 2 stretches into the sedimentation cylinder 7, the baffle cylinder 6 is communicated with the sedimentation cylinder 7 through the guide cylinder 2, an annular mixing area 8 is formed by encircling the outer side surface of the baffle cylinder 6 and the inner side surface of the outer cylinder 1, the mixing area 8 is respectively communicated with the overflow port 4, the baffle cylinder 6 and the sedimentation cylinder 7, a guide baffle 3 is arranged on the lower part of the sedimentation cylinder 7, the guide baffle 3 is positioned below the guide cylinder 2, a sedimentation area 9 is formed by encircling the guide baffle 3 and the lower part of the sedimentation cylinder 7, and a ore discharge port 10 is arranged at the bottom of the sedimentation area 9.
According to the invention, through the improved internal component design of the arc-shaped guide cylinder 2, the flow of fluid in the guide cylinder 2 has the change of sectional area, so that the speed shearing in the flow direction is generated on the original basis, the mixing effect in the crystallizer is further enhanced, and meanwhile, by combining with the design of the arc-shaped guide cylinder 3, after the material in the crystallizer is guided into the guide cylinder 2, finer crystal particles have better following property according to the particle sedimentation characteristic, and follow fluid enters the guide cylinder 2, and then circulates in the crystallizer so that the crystal particles grow; larger particles have better sedimentation property, then the larger particles are settled into a sedimentation zone 9 at the bottom of the crystallizer through an inner hole 31 of the flow guide baffle plate 3, and are discharged through a discharge port 10, so that the size of inorganic salt products in the process of fractional crystallization is ensured, and the entrainment effect of organic pollutants is controlled.
Claims (6)
1. The utility model provides an improved generation crystallizer suitable for high salt waste water divides matter crystallization, includes urceolus and sets up guide cylinder and guide baffle in the urceolus, its characterized in that: the utility model discloses a flow guiding device, including a barrel, a baffle and a baffle plate, the baffle plate all adopt arc design, the medial surface of baffle tube constitute by a plurality of spherical cambered surfaces that connect gradually from top to bottom, the baffle plate be the annular baffle plate of protruding down, the bottom of urceolus be connected with the subsider of back taper, the baffle plate install the lower part of subsider, the baffle plate be located the below of baffle tube, the lateral surface of baffle plate with the inner wall of subsider tangent, the radian of baffle plate correspond the arc be 1.0 ~ 2.8.
2. An improved crystallizer for the fractional crystallization of high-salt wastewater according to claim 1, wherein: the inner side surface and the outer side surface of the guide cylinder are respectively formed by a plurality of spherical cambered surfaces which are connected up and down in sequence.
3. An improved crystallizer for the fractional crystallization of high-salt wastewater according to claim 1 or 2, characterized in that: the radian of the spherical arc corresponding to each spherical arc surface is 0.7-2.4.
4. An improved crystallizer for the fractional crystallization of high-salt wastewater according to claim 1 or 2, characterized in that: the maximum inner diameter of the guide cylinder is 0.15-0.45 times of the inner diameter of the outer cylinder.
5. An improved crystallizer for the fractional crystallization of high-salt wastewater according to claim 1, wherein: the diameter of the inner ring of the flow guide baffle is 0.05-0.25 times of the inner diameter of the outer cylinder.
6. An improved crystallizer for the fractional crystallization of high-salt wastewater according to claim 1, wherein: the outer cylinder is provided with a feed inlet, an overflow port and a propeller, the propeller stretches into the guide cylinder, a baffle cylinder is sleeved on the outer side of the upper part of the guide cylinder, the lower part of the guide cylinder stretches into the sedimentation cylinder, the baffle cylinder is communicated with the sedimentation cylinder through the guide cylinder, an annular mixing area is formed between the outer side surface of the baffle cylinder and the inner side surface of the outer cylinder in a surrounding manner, the mixing area is respectively communicated with the overflow port, the baffle cylinder and the sedimentation cylinder, a sedimentation area is formed between the baffle plate and the lower part of the sedimentation cylinder in a surrounding manner, and an ore discharge port is formed in the bottom of the sedimentation area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910071956.3A CN109761294B (en) | 2019-01-25 | 2019-01-25 | Improved crystallizer suitable for high-salt wastewater fractional crystallization |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910071956.3A CN109761294B (en) | 2019-01-25 | 2019-01-25 | Improved crystallizer suitable for high-salt wastewater fractional crystallization |
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| CN109761294A CN109761294A (en) | 2019-05-17 |
| CN109761294B true CN109761294B (en) | 2024-06-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111282308A (en) * | 2020-03-03 | 2020-06-16 | 宁夏贝利特生物科技有限公司 | Oslo cooling crystallizer for preventing crystal scale |
| CN111977913B (en) * | 2020-09-07 | 2021-05-04 | 安徽清扬水处理设备科技有限公司 | Domestic sewage divides matter multi-stage treatment device |
| CN113292182A (en) * | 2021-07-07 | 2021-08-24 | 盛发环保科技（厦门）有限公司 | Multifunctional integrated flocculation clarification equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722098A (en) * | 2015-04-10 | 2015-06-24 | 化工部长沙设计研究院 | Crystallizer |
| CN104826357A (en) * | 2015-05-28 | 2015-08-12 | 化工部长沙设计研究院 | Crystallizer with rectifying hood |
| CN209635921U (en) * | 2019-01-25 | 2019-11-15 | 中国石油化工股份有限公司 | A kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4519986B2 (en) * | 2000-04-11 | 2010-08-04 | 三菱化工機株式会社 | Crystallization reactor and crystallization dephosphorization method using the same |
| CN203598522U (en) * | 2013-11-04 | 2014-05-21 | 兴化市恒威生物技术有限公司 | Novel freezing crystallization boiler for povidone-iodine solution |
| CN204637635U (en) * | 2015-05-12 | 2015-09-16 | 江苏揽山环境科技有限公司 | A kind of desulfurated plaster crystallization apparatus |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722098A (en) * | 2015-04-10 | 2015-06-24 | 化工部长沙设计研究院 | Crystallizer |
| CN104826357A (en) * | 2015-05-28 | 2015-08-12 | 化工部长沙设计研究院 | Crystallizer with rectifying hood |
| CN209635921U (en) * | 2019-01-25 | 2019-11-15 | 中国石油化工股份有限公司 | A kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime |
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