CN109761294A - A kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime - Google Patents
A kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime Download PDFInfo
- Publication number
- CN109761294A CN109761294A CN201910071956.3A CN201910071956A CN109761294A CN 109761294 A CN109761294 A CN 109761294A CN 201910071956 A CN201910071956 A CN 201910071956A CN 109761294 A CN109761294 A CN 109761294A
- Authority
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- China
- Prior art keywords
- guide shell
- flow apron
- crystallization
- outer cylinder
- salt wastewater
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000002425 crystallisation Methods 0.000 title claims abstract description 33
- 230000008025 crystallization Effects 0.000 title claims abstract description 32
- 239000002351 wastewater Substances 0.000 title claims abstract description 27
- 239000002245 particle Substances 0.000 abstract description 17
- 239000013078 crystal Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 13
- 239000012530 fluid Substances 0.000 abstract description 11
- 238000002156 mixing Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 7
- 238000004062 sedimentation Methods 0.000 abstract description 5
- 238000005728 strengthening Methods 0.000 abstract description 4
- 238000010992 reflux Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Abstract
The invention discloses a kind of modified crystallizers suitable for the crystallization of high-salt wastewater sub-prime, and including outer cylinder and the guide shell and flow apron that are arranged in outer cylinder, the bottom of outer cylinder is arranged in flow apron, and guide shell and flow apron are all made of cambered design.The present invention improves traditional mold structure, is designed using the structure of arc guide shell, and the variation based on fluid flow direction sectional area enhances crystallizer flow field shear action, and then strengthens the mixing of crystallizer materials inside；Simultaneously, install the flow apron for using cambered design additional in crystalliser feet, for strengthening the class settling of crystal grain, according to particle sedimentation theory, microlite particle will grow up together with continuing to circulate until in fluid reflux to guide shell, coarse crystal particle then settles into crystalliser feet, and then guarantees the size of crystalline particulate product.The present invention improves the operating efficiency and fineness of crystallizer by strengthening fluid mixing and particle infall process in crystallizer.
Description
Technical field
The present invention relates to Crystallization Separation technical field, specifically a kind of modified knot suitable for the crystallization of high-salt wastewater sub-prime
Brilliant device.
Background technique
Crystallization is one of most important unit operation in chemical separation engineering, is widely used in industrial processes, especially
It is the exploitation of coal chemical industry high-salt wastewater near-zero release technique in recent years, proposes requirements at the higher level to sub-prime crystallization technique equipment.
Coal chemical industry high-salt wastewater is inorganic-organic interaction system, due to the presence of persistent organic pollutants, sub-prime crystallization
Often there is the attachment and entrainment of organic matter in the inorganic salt product of recycling, product quality is difficult to ensure.Crystallizer is as sub-prime knot
Brilliant process is mainly equipped, and is crystal salt quality control platform the most direct.Present inventor is the study found that sufficient material
Mixing with crystal growth be control organic pollutant entrainment two important means, therefore, in crystallizer mixed process strengthen with
Crystal grain size control is the key that coal chemical industry high-salt wastewater sub-prime crystallization processes process.
CN105597362A patent discloses a kind of mechanical crystallizer of Potash Industry, including crystallizer ontology, outer cylinder, leads
Flow cartridge, feed baffle, main agitating device, bowl-type baffle and discharge agitating device, the outer cylinder, guide shell, feed baffle, bowl-type
Baffle is fixedly connected with crystallizer ontology, and the main agitating device, discharge agitating device pass through bracket and bearing and crystallizer sheet
Body connection, crystallizer ontology upper end are equipped with mother liquor overflow mouth, and bottom is equipped with discharge gate, and the bowl-type baffle is located at guide shell
Underface, the bottom domes low in intermediate high surrounding, bottom is surrounded by material intercommunicating pore.Using the present invention to potassium chloride
Crystallization production is carried out with potassium sulfate, raw material feeding granularity can be made to be amplified to 8mm, crystallisation cycle slurry is opposite with crystalline product to be divided
From effectively improving circulation slurry mass concentration and crystallizer treating capacity, increase crystalline product granularity, reduce the original in crystalline product
Expect entrainment rate, obtains better crystallization effect.But the guide shell and bowl-type baffle in the crystallizer be it is common horn-like and
Bowl-shape design, similar with guide shell in traditional crystallizer and baffle, the inner surface of guide shell and bowl-type baffle in the patent is
Linear type, there is no the velocity gradients on circulating direction, are not fully solved the mixed intensified and crystal grain size control of material
Problem processed.
The present invention passes through the analysis of crystallizer flow field structure, has carried out Curve guide impeller to mold structure, to realize knot
Brilliant device internal mixing process strengthens and crystal grain grading control, promotes the operating efficiency and fine degree of crystallizer.
Summary of the invention
The technical problems to be solved by the present invention are: in view of the deficiencies of the prior art, rationally being set to mold structure
Meter, optimization crystallizer interior flow field distribution, strengthens crystallizer internal shear immixture, realizes crystal according to particle sedimentation theory
The grading control of particle provides a kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime, to promote the behaviour of crystallizer
Make efficiency and fineness.
The technical scheme of the invention to solve the technical problem is: it is a kind of suitable for high-salt wastewater sub-prime crystallization
Modified crystallizer, including outer cylinder and the guide shell and flow apron that are arranged in outer cylinder, the flow apron is arranged in institute
The bottom for the outer cylinder stated, the guide shell and the flow apron are all made of cambered design.
The present invention improves traditional mold structure, and cambered design is respectively adopted to guide shell and flow apron,
The hydrodynamic characteristic for meeting solid-liquid two-phase in crystallizer is conducive to the development of crystallizer flow field, can further strengthen crystallization
Fluid mixing in device improves its operating efficiency to make full use of Multiphase Flow feature in crystallizer with particle infall process
And fineness.
The present invention is designed using the structure of arc guide shell, and the variation based on fluid flow direction sectional area makes in crystallizer
Flow field shear action is enhanced, and then strengthens the mixing of crystallizer materials inside.Arc is used in addition, installing additional in crystalliser feet
The flow apron of design, for strengthening the class settling of crystal grain.According to particle sedimentation theory, microlite particle will be together with stream
Body is back under baffle effect to be continued to circulate until in guide shell and grows up, and coarse crystal particle is then entered due to its settling property
Crystalliser feet, and then guarantee the size of crystalline particulate product.
Preferably, the medial surface of the guide shell is made of multiple sequentially connected spherical arcs up and down.
Preferably, the medial surface and lateral surface of the guide shell are respectively by multiple sequentially connected spherical arcs up and down
It constitutes.
Further, the radian of the corresponding spherical camber line of each spherical arc is 0.7 ~ 2.4.
Further, the maximum inner diameter of the guide shell is 0.15 ~ 0.45 times of the internal diameter of the outer cylinder.
Preferably, the annular flow apron that the flow apron is convex under being, the lateral surface of the flow apron
It is tangent with the inner wall of the outer cylinder.
Further, the radian of the corresponding camber line of the flow apron is 1.0 ~ 2.8.
Further, the diameter of the inner ring of the flow apron is 0.05 ~ 0.25 times of the internal diameter of the outer cylinder.
Preferably, being provided with feed inlet, overflow port and propeller on the outer cylinder, the propeller protrudes into described
Guide shell in, the outer sheath on the top of the guide shell is equipped with baffling cylinder, and the bottom of the outer cylinder is connected with back taper
Settlement barrel, the lower part of the guide shell protrudes into the settlement barrel, and the baffling cylinder is through the guide shell and institute
The settlement barrel stated communicates, and the mixed zone of annular is surrounded between the lateral surface of the baffling cylinder and the medial surface of the outer cylinder,
The mixed zone is communicated with the overflow port, baffling cylinder and settlement barrel respectively, and the flow apron is mounted on described
The lower part of settlement barrel, the flow apron are located at the lower section of the guide shell, the flow apron and the sedimentation
The lower part of cylinder surrounds decanting zone, and the bottom of the decanting zone is provided with gape.The crystallizer is only specifically to be set using arc
The guide shell of meter and a kind of modified crystallizer application example suitable for the crystallization of high-salt wastewater sub-prime of flow apron.In reality
In, the guide shell and flow apron of cambered design be can also be applied in other traditional crystallizers, replace its corresponding water conservancy diversion
Cylinder and flow apron.
Compared with the prior art, the advantages of the present invention are as follows: it is disclosed by the invention to be suitable for what high-salt wastewater sub-prime crystallized
Modified crystallizer improves traditional mold structure, is designed using the structure of arc guide shell, is flowed based on fluid
The variation of direction sectional area enhances crystallizer flow field shear action, and then strengthens the mixing of crystallizer materials inside；Together
When, the flow apron for using cambered design is installed additional in crystalliser feet, for strengthening the class settling of crystal grain, according to particle
Sedimentation theory, microlite particle will grow up together with continuing to circulate until in fluid reflux to guide shell, and coarse crystal particle then settles
Into crystalliser feet, and then guarantee the size of crystalline particulate product.The present invention by strengthen crystallizer in fluid mixing with
Particle infall process improves the operating efficiency and fineness of crystallizer.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for being suitable for the modified crystallizer of high-salt wastewater sub-prime crystallization in embodiment.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
The modified crystallizer for being suitable for the crystallization of high-salt wastewater sub-prime of embodiment 1, as shown in Figure 1, including outer cylinder 1 and setting
Guide shell 2 and flow apron 3 in outer cylinder 1 are set, the bottom of outer cylinder 1, guide shell 2 and flow apron 3 is arranged in flow apron 3
It is all made of cambered design, the medial surface of guide shell 2 is made of multiple sequentially connected spherical arcs 21 up and down.Flow apron 3 is
Under convex annular flow apron 3, the inner wall of the lateral surface and outer cylinder 1 of flow apron 3 is tangent.
The modified crystallizer for being suitable for the crystallization of high-salt wastewater sub-prime of embodiment 2, the difference from embodiment 1 is that, it is real
It applies in example 2, the radian of the corresponding spherical shape camber line of each spherical arc 21 is 0.7 ~ 2.4,
The modified crystallizer for being suitable for the crystallization of high-salt wastewater sub-prime of embodiment 3, the difference from example 2 is that, embodiment 3
In, the maximum inner diameter of guide shell 2 is 0.15 ~ 0.45 times of the internal diameter of outer cylinder 1.
The modified crystallizer for being suitable for the crystallization of high-salt wastewater sub-prime of embodiment 4, the difference with embodiment 3 are, real
It applies in example 4, the flow apron 3 of the annular convex under being of flow apron 3, the inner wall of the lateral surface and outer cylinder 1 of flow apron 3 is tangent,
The radian of the corresponding camber line of flow apron 3 is 1.0 ~ 2.8.
The modified crystallizer for being suitable for the crystallization of high-salt wastewater sub-prime of embodiment 5, the difference with embodiment 4 are, real
It applies in example 5, the diameter of the inner ring of flow apron 3 is 0.05 ~ 0.25 times of the internal diameter of outer cylinder 1.
Embodiment 6 is specifically to be suitable for high-salt wastewater sub-prime using one kind of the guide shell 2 of cambered design and flow apron 3
The modified crystallizer application example of crystallization.As shown in Figure 1, the modified crystallizer includes outer cylinder 1 and is arranged in outer cylinder 1
The bottom of outer cylinder 1 is arranged in guide shell 2 and flow apron 3, flow apron 3, and guide shell 2 and flow apron 3 are all made of arc and set
The medial surface of meter, guide shell 2 is made of multiple sequentially connected spherical arcs 21 up and down；Feed inlet is provided on outer cylinder 1 (in figure
Be not shown), overflow port 4 and propeller 5, propeller 5 protrude into guide shell 2, the outer sheath on the top of guide shell 2 is equipped with baffling cylinder
6, the bottom of outer cylinder 1 is connected with the settlement barrel 7 of back taper, and the lower part of guide shell 2 is protruded into settlement barrel 7, and baffling cylinder 6 is through guide shell
2 communicate with settlement barrel 7, the mixed zone 8 of annular are surrounded between the lateral surface of baffling cylinder 6 and the medial surface of outer cylinder 1, mixed zone 8 is divided
It is not communicated with overflow port 4, baffling cylinder 6 and settlement barrel 7, flow apron 3 is mounted on the lower part of settlement barrel 7, and flow apron 3, which is located at, leads
The lower part of the lower section of flow cartridge 2, flow apron 3 and settlement barrel 7 surrounds decanting zone 9, and the bottom of decanting zone 9 is provided with gape 10.
By two-phase solid-liquid fluid mechanical behavior characteristic in crystallizer it is found that traditional inner surface is linear 2 He of guide shell
There is no the velocity gradients on circulating direction for flow apron 3, and the present invention is set by the modified inner member of arc guide shell 2
It counts, there are the variations of sectional area for fluid circulation in guide shell 2, and the speed thus generated on the original basis on circulating direction is cut
It cuts, further enhances the immixture in crystallizer, meanwhile, the material in conjunction with the design of arc flow apron 3, in crystallizer
After entering guide shell 2 by water conservancy diversion, according to particle settling character, thinner crystalline particle has preferable followability, follows fluid
It recycles into guide shell 2, and then in crystallizer so that crystal grain is grown up；Biggish particle has preferable settleability, then
The decanting zone 9 of crystalliser feet is settled by the inner hole 31 of flow apron 3, and by 10 discharge of gape, and then guarantee
The inorganic salt product size of sub-prime crystallization processes process, to control the entrainment effect of organic pollutant.
Claims (9)
1. a kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime, including outer cylinder and the guide shell being arranged in outer cylinder
And the bottom of the outer cylinder is arranged in flow apron, the flow apron, it is characterised in that: the guide shell and described
Flow apron be all made of cambered design.
2. a kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime according to claim 1, it is characterised in that:
The medial surface of the guide shell is made of multiple sequentially connected spherical arcs up and down.
3. a kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime according to claim 1, it is characterised in that:
The medial surface and lateral surface of the guide shell are made of multiple sequentially connected spherical arcs up and down respectively.
4. a kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime according to claim 2 or 3, feature exist
In: the radian of the corresponding spherical camber line of spherical arc described in each is 0.7 ~ 2.4.
5. a kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime according to claim 2 or 3, feature exist
In: the maximum inner diameter of the guide shell is 0.15 ~ 0.45 times of the internal diameter of the outer cylinder.
6. a kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime according to claim 1, it is characterised in that:
The flow apron of flow apron annular convex under being, the inner wall of the lateral surface of the flow apron and the outer cylinder
It is tangent.
7. a kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime according to claim 6, it is characterised in that:
The radian of the corresponding camber line of the flow apron is 1.0 ~ 2.8.
8. a kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime according to claim 6, it is characterised in that:
The diameter of the inner ring of the flow apron is 0.05 ~ 0.25 times of the internal diameter of the outer cylinder.
9. a kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime according to claim 1, it is characterised in that:
Feed inlet, overflow port and propeller are provided on the outer cylinder, the propeller protrudes into the guide shell, described
The outer sheath on the top of guide shell is equipped with baffling cylinder, and the bottom of the outer cylinder is connected with the settlement barrel of back taper, and described leads
The lower part of flow cartridge is protruded into the settlement barrel, and the baffling cylinder is communicated through the guide shell with the settlement barrel, institute
Surrounded between the lateral surface for the baffling cylinder stated and the medial surface of the outer cylinder annular mixed zone, the mixed zone respectively with
Overflow port, baffling cylinder and the settlement barrel communicates, and the flow apron is mounted on the lower part of the settlement barrel, described
Flow apron is located at the lower section of the guide shell, and the lower part of the flow apron and the settlement barrel surrounds decanting zone,
The bottom of the decanting zone is provided with gape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910071956.3A CN109761294A (en) | 2019-01-25 | 2019-01-25 | A kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime |
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| CN201910071956.3A CN109761294A (en) | 2019-01-25 | 2019-01-25 | A kind of modified crystallizer suitable for the crystallization of high-salt wastewater sub-prime |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111977913A (en) * | 2020-09-07 | 2020-11-24 | 安徽清扬水处理设备科技有限公司 | Domestic sewage divides matter multi-stage treatment device |
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| JP2001286701A (en) * | 2000-04-11 | 2001-10-16 | Mitsubishi Kakoki Kaisha Ltd | Crystallization reaction apparatus and crystallization/ dephosphorization method using the same |
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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 |
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