CN109045830B - Mother liquor discharge system - Google Patents
Mother liquor discharge system Download PDFInfo
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- CN109045830B CN109045830B CN201810967180.9A CN201810967180A CN109045830B CN 109045830 B CN109045830 B CN 109045830B CN 201810967180 A CN201810967180 A CN 201810967180A CN 109045830 B CN109045830 B CN 109045830B
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- pipeline
- mother liquor
- cyclone
- cyclone filter
- filter
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- 239000012452 mother liquor Substances 0.000 title claims abstract description 68
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 239000007790 solid phase Substances 0.000 claims abstract description 24
- 239000007791 liquid phase Substances 0.000 claims abstract description 19
- 239000002002 slurry Substances 0.000 claims description 24
- 150000003839 salts Chemical class 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 239000013078 crystal Substances 0.000 claims description 20
- 238000005406 washing Methods 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 8
- 239000012267 brine Substances 0.000 claims description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- ADHFMENDOUEJRK-UHFFFAOYSA-N 9-[(4-fluorophenyl)methyl]-n-hydroxypyrido[3,4-b]indole-3-carboxamide Chemical compound C1=NC(C(=O)NO)=CC(C2=CC=CC=C22)=C1N2CC1=CC=C(F)C=C1 ADHFMENDOUEJRK-UHFFFAOYSA-N 0.000 description 4
- 241001482237 Pica Species 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 241001131796 Botaurus stellaris Species 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cyclones (AREA)
Abstract
The invention belongs to the technical field of mother liquor treatment, and particularly relates to a mother liquor discharge system. According to the mother liquid discharge system, a solid-liquid phase discharge liquid system is divided into two paths through a pipeline and is respectively connected with the middle upper parts of a first cyclone separator and a second cyclone separator, the tops of the first cyclone separator and the second cyclone separator are combined through the pipeline and then divided into two paths and are respectively connected with the middle parts of the first cyclone filter and the second cyclone filter, and the tops of the first cyclone filter and the second cyclone filter are combined through the pipeline and then are connected with a high-quality mother liquid system through the pipeline; the bottoms of the first cyclone filter and the second cyclone filter are combined through a pipeline and then connected with the top of the mother liquor tank. The mother liquor discharge system does not depend on a centrifugal machine for mother liquor production, and mainly adopts a cyclone separator and a cyclone filter, so that the contradiction between the process requirement and the limitation of the centrifugal machine is not caused any more; the cyclone filter is matched with a centrifugal machine, so that the purity of a solid phase and the controllable and predictable composition of a liquid phase can be considered.
Description
Technical Field
The invention belongs to the technical field of mother liquor treatment, and particularly relates to a mother liquor discharge system.
Background
The mother liquor, commonly known as bittern, is a saturated solution remaining after separation of precipitates or crystals during chemical precipitation or crystallization. In the traditional process, the mother liquor is separated from the residual material flow after the high solid phase material flow is separated by the solid-liquid separation equipment, the operation is very common, but under partial working conditions, such as salt separation and crystallization, the common operation can not produce the mother liquor according to the process requirement.
The problems of the traditional process are mainly reflected in the following aspects:
(1) the mother liquor produced by the centrifugal machine is not enough
The reason for this problem is that the centrifuge requires the solid phase volume ratio of the feed crystal slurry, for example, the double-push centrifuge requires the solid phase volume ratio of the feed to be not less than 30%, otherwise the centrifuge will dilute to produce salt slurry with high moisture content. Therefore, the mother liquor produced by a centrifuge has an upper limit of mother liquor production, and when the mother liquor production required by the process is higher than the upper limit, the whole system can wander among paralysis and produced wet salt pulp.
(2) The mother liquor produced by the centrifugal machine exists solid phase
Centrifuges are used as mobile devices to separate solid and liquid phases by means of centrifugal force and a filter medium and a filter cake layer. Ideally, no solid phase exists in the centrifugal mother liquor, but in actual operation, the mother liquor inevitably entrains solid phase particles which are not completely separated, and the solid phase particles are an incalculable accumulation amount in a system requiring strict parameter control, so that the system gradually deviates from the design requirement.
(3) Breaking mother liquor component by washing salt water of centrifugal machine
In the process with requirements on solid-phase discharge, salt washing is often required on the solid-phase discharge, components of the mother liquor become unstable and unpredictable after the salt washing water is mixed into the mother liquor, and the use of the mother liquor as a subsequent feeding can cause the subsequent procedures to be completely deviated from the design.
In order to solve the above problems, it is necessary to design a new mother liquor discharge system.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a mother liquor discharge system. The mother liquor discharge system does not depend on a centrifugal machine to produce mother liquor, the process requirement and the limitation of the centrifugal machine do not cause contradiction any more, and the cyclone filter and the centrifugal machine can give consideration to both solid phase purification and controllable and predictable liquid phase components.
The mother liquor discharge system comprises a first cyclone separator, a first cyclone filter, a mother liquor tank, a centrifugal machine, a salt washing water system and a crystal slurry tank; the solid-liquid phase discharging liquid system is divided into two paths through a pipeline and is respectively connected with the middle upper parts of the first cyclone separator and the second cyclone separator, the tops of the first cyclone separator and the second cyclone separator are combined through a pipeline and then divided into two paths and are respectively connected with the middle parts of the first cyclone filter and the second cyclone filter, and the tops of the first cyclone filter and the second cyclone filter are combined through a pipeline and then are connected with the high-quality mother liquid system through a pipeline; the bottoms of the first cyclone filter and the second cyclone filter are combined through a pipeline and then connected with the top of the mother liquor tank.
Wherein:
the bottoms of the first cyclone separator and the second cyclone separator are connected with the top of the crystal slurry tank through a pipeline, and the middle upper part of the crystal slurry tank is connected with the top of the mother liquor tank through a pipeline; the bottom of the crystal slurry tank is connected with a feeding pipe of the centrifuge through a pipeline, the crystal slurry tank is divided into two paths after penetrating through the centrifuge, one path is connected with a solid phase discharging system, and the other path is connected with the top of the mother liquid tank through a pipeline.
The bottom of the mother liquid tank is divided into two paths through a pipeline and is respectively connected with the lower parts of the first mother liquid pump and the second mother liquid pump, and the upper parts of the first mother liquid pump and the second mother liquid pump are combined through a pipeline and then are connected with a low-quality mother liquid system.
The brine washing system is divided into two paths through a pipeline and is respectively connected with the top part and the middle upper part of the centrifugal machine, the circulating water inlet system is connected with the centrifugal machine through a pipeline and is connected with the circulating water outlet system through a pipeline after passing through the centrifugal machine, and circulating water plays a role in cooling the centrifugal machine.
The first cyclone filter and the second cyclone filter are arranged in parallel, wherein one of the first cyclone filter and the second cyclone filter is in a normally open state, and the other one of the first cyclone filter and the second cyclone filter is in a normally closed state; first cyclone filter is electrically connected with PICA101 and PICA102, and after being connected in parallel, PICA101 and PICA102 are connected in series with XV 101; second cyclone is electrically connected to PICA103 and PICA104, and PICA103 and PICA104 are connected in parallel and then connected in series to XV 102.
Valves XV101 and XV102 are both two-position valves.
When the first cyclone filter is in the working state and the second cyclone filter is in the standby state:
the solid-liquid phase discharge liquid in the solid-liquid phase discharge liquid system is divided into two paths through a pipeline, the two paths respectively enter a first cyclone separator and a second cyclone separator, after primary separation is carried out in the first cyclone separator and the second cyclone separator, the obtained liquid phase passes through the tops of the first cyclone separator and the second cyclone separator, and is merged through the pipeline to enter a first cyclone filter, the first cyclone filter further separates the incoming liquid phase, and high-quality mother liquid obtained after separation is discharged into the high-quality mother liquid system through the pipeline; after the primary separation by the first cyclone separator and the second cyclone separator, the obtained salt slurry with high solid-phase ratio enters a crystal slurry tank, the further treatment is carried out in the crystal slurry tank, and after the treatment by the crystal slurry tank, the obtained overflow liquid enters a mother liquid tank through a pipeline; the obtained salt slurry with high solid-phase ratio enters a centrifuge, the salt washing water in the salt washing water system enters the centrifuge in two paths through a pipeline to wash the salt of the materials in the centrifuge, the mother liquor in the produced salt is replaced, the circulating water in the circulating water inlet system enters the centrifuge through the pipeline, passes through the centrifuge and then enters a circulating water outlet system through the pipeline, and the temperature of the centrifuge is reduced; the salt washing water further processes the materials entering the centrifuge, the obtained solid phase enters a solid phase discharging system, and the obtained liquid phase enters a mother liquor tank.
The materials entering the mother liquor tank respectively enter a first mother liquor pump and a second mother liquor pump through pipelines, and the first mother liquor pump and the second mother liquor pump enter a low-quality mother liquor system after being combined through the pipelines.
Compared with the prior art, the invention has the following beneficial effects:
(1) the mother liquor production is carried out without depending on a centrifugal machine, mainly by a cyclone separator and a cyclone filter, and the contradiction between the process requirement and the limitation of the centrifugal machine is not caused any more.
(2) The cyclone filter is matched with a centrifugal machine, so that the purity of a solid phase and the controllable and predictable composition of a liquid phase can be considered.
(3) The low-mass mother liquor does not affect the process balance, simplifies the process design difficulty, and reduces the operation difficulty and the precision requirement of the centrifugal section in the actual engineering.
Drawings
FIG. 1 is a flow chart of a mother liquor discharge system.
Wherein: 1. a first cyclone separator; 2. a second cyclone separator; 3. a crystal slurry tank; 4. a centrifuge; 5. a first cyclone filter; 6. a second cyclone filter; 7. a mother liquor tank; 8. a first mother liquor pump; 9. a second mother liquor pump; 10. a solid-liquid phase discharging liquid system; 11. a saline washing system; 12. a solid phase discharge system; 13. a circulating water outlet system; 14. a circulating water inlet system; 15. a low-quality mother liquor system; 16. a high quality mother liquor system; 17. a PICA 101; 18. PICA 102; 19. a PICA 103; 20. PICA 104; 21. XV 101; 22. XV 102.
Detailed Description
The present invention is further described below with reference to examples.
Example 1
The mother liquor discharge system comprises a first cyclone separator (1), a first cyclone filter (5), a mother liquor tank (7), a centrifugal machine (4), a salt water washing system (11) and a crystal slurry tank (3); the solid-liquid phase discharging liquid system (10) is divided into two paths through a pipeline and is respectively connected with the middle upper parts of the first cyclone separator (1) and the second cyclone separator (2), the tops of the first cyclone separator (1) and the second cyclone separator (2) are merged through a pipeline and then divided into two paths and are respectively connected with the middle parts of the first cyclone filter (5) and the second cyclone filter (6), and the tops of the first cyclone filter (5) and the second cyclone filter (6) are merged through a pipeline and then are connected with the high-quality mother liquid system (16) through a pipeline; the bottoms of the first cyclone filter (5) and the second cyclone filter (6) are combined through a pipeline and then connected with the top of the mother liquor tank (7).
When the first cyclone filter (5) is in the working state and the second cyclone filter (6) is in the standby state:
the solid-liquid phase discharge liquid in the solid-liquid phase discharge liquid system (10) is divided into two paths through a pipeline, the two paths enter a first cyclone separator (1) and a second cyclone separator (2) respectively, after primary separation is carried out in the first cyclone separator (1) and the second cyclone separator (2), the obtained liquid phase is communicated with the tops of the first cyclone separator (1) and the second cyclone separator (2) and merged into the first cyclone filter (5) through the pipeline, the first cyclone filter (5) further separates the incoming liquid phase, and high-quality mother liquid obtained after separation is discharged into a high-quality mother liquid system (16) through the pipeline; after the primary separation by the first cyclone separator (1) and the second cyclone separator (2), the obtained salt slurry with high solid-phase ratio enters a crystal slurry tank (3), the salt slurry is further processed in the crystal slurry tank (3), and after the treatment by the crystal slurry tank (3), the obtained overflow liquid enters a mother liquid tank (7) through a pipeline; the obtained salt slurry with the high solid-phase ratio enters a centrifugal machine (4), salt washing water in a salt washing water system (11) enters the centrifugal machine (4) in two paths through a pipeline, salt washing is carried out on materials in the centrifugal machine (4), mother liquor in produced salt is replaced, circulating water in a circulating water inlet system (14) enters the centrifugal machine (4) through the pipeline, and enters a circulating water outlet system (13) through the pipeline after passing through the centrifugal machine (4), so that the centrifugal machine (4) is cooled; the washing brine further processes the materials entering the centrifuge (4), the obtained solid phase enters a solid phase discharging system (12), and the obtained liquid phase enters a mother liquor tank (7).
The materials entering the mother liquor tank (7) respectively enter a first mother liquor pump (8) and a second mother liquor pump (9) through pipelines, and the first mother liquor pump (8) and the second mother liquor pump (9) are merged through pipelines and then enter a low-quality mother liquor system (15).
Claims (6)
1. A mother liquor drainage system characterized by: comprises a first cyclone separator (1), a first cyclone filter (5), a mother liquor tank (7), a centrifuge (4), a salt water washing system (11) and a crystal mush tank (3); the solid-liquid phase discharging liquid system (10) is divided into two paths through a pipeline and is respectively connected with the middle upper parts of the first cyclone separator (1) and the second cyclone separator (2), the tops of the first cyclone separator (1) and the second cyclone separator (2) are merged through a pipeline and then divided into two paths and are respectively connected with the middle parts of the first cyclone filter (5) and the second cyclone filter (6), and the tops of the first cyclone filter (5) and the second cyclone filter (6) are merged through a pipeline and then are connected with the high-quality mother liquid system (16) through a pipeline; the bottoms of the first cyclone filter (5) and the second cyclone filter (6) are combined through a pipeline and then connected with the top of the mother liquor tank (7).
2. The mother liquor drainage system of claim 1, wherein: the bottoms of the first cyclone separator (1) and the second cyclone separator (2) are connected with the top of the crystal slurry tank (3) through a pipeline, and the middle upper part of the crystal slurry tank (3) is connected with the top of the mother liquor tank (7) through a pipeline.
3. The mother liquor drainage system of claim 1, wherein: the bottom of the crystal slurry tank (3) is connected with a feeding pipe of the centrifuge (4) through a pipeline, the crystal slurry tank penetrates through the centrifuge (4) and then is divided into two paths, one path is connected with the solid phase discharging system (12), and the other path is connected with the top of the mother liquor tank (7) through a pipeline.
4. The mother liquor drainage system of claim 1, wherein: the bottom of the mother liquid tank (7) is divided into two paths through a pipeline and is respectively connected with the lower parts of the first mother liquid pump (8) and the second mother liquid pump (9), and the upper parts of the first mother liquid pump (8) and the second mother liquid pump (9) are combined through a pipeline and then are connected with the low-quality mother liquid system (15).
5. The mother liquor drainage system of claim 1, wherein: the brine washing system (11) is divided into two paths through a pipeline and is respectively connected with the top and the middle upper part of the centrifugal machine (4), the circulating water inlet system (14) is connected with the centrifugal machine (4) through a pipeline and is connected with the circulating water outlet system (13) through a pipeline after passing through the centrifugal machine (4).
6. The mother liquor drainage system of claim 1, wherein: the first cyclone filter (5) and the second cyclone filter (6) are arranged in parallel, wherein one of the first cyclone filter and the second cyclone filter is in a normally open state, and the other one of the first cyclone filter and the second cyclone filter is in a normally closed state; the first cyclone filter (5) is electrically connected with PICA101(17) and PICA102(18), and the PICA101(17) and the PICA102(18) are connected in parallel and then connected in series with XV101 (21); second cyclone filter (6) is electrically connected to PICA103(19) and PICA104(20), and PICA103(19) and PICA104(20) are connected in parallel and then connected in series to XV102 (22).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810967180.9A CN109045830B (en) | 2018-08-23 | 2018-08-23 | Mother liquor discharge system |
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|---|---|---|---|
| CN201810967180.9A CN109045830B (en) | 2018-08-23 | 2018-08-23 | Mother liquor discharge system |
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| CN109045830A CN109045830A (en) | 2018-12-21 |
| CN109045830B true CN109045830B (en) | 2021-02-02 |
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2018
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| CN1472139A (en) * | 2003-07-10 | 2004-02-04 | 江苏德邦化学工业集团有限公司 | Method for separating magma in producing soda process |
| JP4428484B2 (en) * | 2007-07-03 | 2010-03-10 | 有限会社シーエス技術研究所 | High purity silicon production equipment |
| CN101555002A (en) * | 2009-05-18 | 2009-10-14 | 江苏省丹爱化工有限公司 | Method for preparing high-purity sodium hypophosphite |
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| CN109045830A (en) | 2018-12-21 |
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Effective date of registration: 20231228 Address after: Room 6, Building 22, Zhongtian City Garden Villa Area, Jingjiang City, Taizhou City, Jiangsu Province, 214500 Patentee after: Xu Xiang Patentee after: Chen Xu Address before: 214500 Taizhou, Jiangsu Jingjiang City, Ma Qiao Town, north new high tech Industrial Zone 8 Patentee before: Xu Xiang |
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Effective date of registration: 20240115 Address after: Room 8428, Chengnan Talent Apartment Building, No. 128 Xinzhou Road, Jingjiang City, Taizhou City, Jiangsu Province, 214500 Patentee after: Jiangsu Shixin Environmental Protection and Energy Conservation Technology Co.,Ltd. Address before: Room 6, Building 22, Zhongtian City Garden Villa Area, Jingjiang City, Taizhou City, Jiangsu Province, 214500 Patentee before: Xu Xiang Patentee before: Chen Xu |