CN104071761A - Continuous crystallizing and centrifuging system for producing phosphorous acid - Google Patents
Continuous crystallizing and centrifuging system for producing phosphorous acid Download PDFInfo
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- CN104071761A CN104071761A CN201410199111.XA CN201410199111A CN104071761A CN 104071761 A CN104071761 A CN 104071761A CN 201410199111 A CN201410199111 A CN 201410199111A CN 104071761 A CN104071761 A CN 104071761A
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- crystallizer
- phosphorous acid
- pipeline
- condenser
- continuous crystallisation
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Abstract
The invention discloses a continuous crystallizing and centrifuging system for producing phosphorous acid. The system comprises a concentration kettle, a condenser, a crystallizer, a centrifugal machine and a circulating pump, and is characterized in that the concentration kettle is connected with the condenser by virtue of the circulating pump; the condenser is connected with the crystallizer by virtue of a pipeline; the crystallizer is connected with the centrifugal machine by virtue of a pipeline. According to the system, the defect of the prior art is overcome, the crystallizing time is greatly shortened, the production efficiency is improved, the energy consumption is reduced, the equipment investment is reduced, the pollution to human, equipment and environment in the operation process is reduced, and the system is safe and environment-friendly.
Description
Technical field
The invention belongs to chemical field, be specifically related to a kind of phosphorous acid and produce continuous crystallisation centrifugation systems.
Background technology
Phosphorous acid is diprotic acid, has reductibility, as the raw material of manufacturing phosphite, pesticide intermediate, organophosphorus water conditioner, also as stabilizer for plastics or antioxidant.At present, the production method of phosphorous acid mainly contains two kinds of phosphorus trichloride hydrolysis method and dimethyl phosphate hydrolysis method, adopt which kind of production method all will pass through concentrated, crystallization, the technique such as centrifugal obtains finished product, domestic existing manufacturer crystallization centrifuging process is all that the material after concentrated is put into several crystallization kettles, use while stirring after cooling water temperature crystallization centrifugal again, mother liquor after centrifugal enters recycled in concentration kettle, this technique crystallization time is long, production efficiency is low, energy consumption is large, facility investment is large, production plant acid mist is heavier, to human body, equipment, environment has larger pollution.
Summary of the invention
Goal of the invention: the object of the invention is to, for the deficiencies in the prior art, provide a kind of phosphorous acid to produce continuous crystallisation centrifugation systems.
Technical scheme: in order to reach foregoing invention object, the present invention is specifically achieved like this: a kind of phosphorous acid is produced continuous crystallisation centrifugation systems, comprise concentration kettle, condenser, crystallizer, whizzer, recycle pump, it is characterized in that, concentration kettle is connected with condenser by recycle pump, condenser connects crystallizer by pipeline, and crystallizer separately connects whizzer by pipeline.
Wherein, described crystallizer connects vacuum absorption device by pipeline, can make the tail gas producing discharge rapidly crystallizer.
Wherein, described recycle pump, whizzer are all connected with mother liquor tank by pipeline, facilitate mother liquid recycling.
Wherein, in described crystallizer, be divided into clear liquid area, negative area, crystallizing field from top to bottom, in negative area, be provided with simple type baffle plate, in simple type baffle plate, have guide shell water conservancy diversion.
, in described guide shell, be provided with stirring rod, accelerate material sedimentation.
Beneficial effect: the present invention has overcome the deficiency of existing technique, has greatly shortened crystallization time, has improved production efficiency, has saved energy consumption, has reduced facility investment, has reduced the pollution to people, equipment, environment in operating process, safety environmental protection again.
Accompanying drawing explanation
Accompanying drawing is structural representation of the present invention.
Embodiment
As shown in drawings, a kind of phosphorous acid disclosed by the invention is produced continuous crystallisation centrifugation systems, comprise concentration kettle 1, condenser 2, crystallizer 3, whizzer 4, recycle pump 5, concentration kettle 1 is connected with condenser 2 by recycle pump 5, condenser 2 connects crystallizer 3 by pipeline, crystallizer 3 separately connects respectively whizzer 4 and vacuum absorption device 6 by pipeline, described recycle pump 5, whizzer 4 is all connected with mother liquor tank 7 by pipeline, in described crystallizer 3, be divided into clear liquid area 31 from top to bottom, negative area 32, crystallizing field 33, in negative area 32, be provided with simple type baffle plate 321, in letter type baffle plate 321, there are guide shell 322 water conservancy diversion, in described guide shell 322, be provided with stirring rod 323.
Claims (5)
1. a phosphorous acid is produced continuous crystallisation centrifugation systems, comprise concentration kettle (1), condenser (2), crystallizer (3), whizzer (4), recycle pump (5), it is characterized in that, concentration kettle (1) is connected with condenser (2) by recycle pump (5), condenser (2) connects crystallizer (3) by pipeline, and crystallizer (3) separately connects whizzer (4) by pipeline.
2. phosphorous acid according to claim 1 is produced continuous crystallisation centrifugation systems, it is characterized in that, described crystallizer (3) connects vacuum absorption device (6) by pipeline.
3. phosphorous acid according to claim 1 and 2 is produced continuous crystallisation centrifugation systems, it is characterized in that, described recycle pump (5), whizzer (4) are all connected with mother liquor tank (7) by pipeline.
4. phosphorous acid according to claim 3 is produced continuous crystallisation centrifugation systems, it is characterized in that, in described crystallizer (3), be divided into clear liquid area (31), negative area (32), crystallizing field (33) from top to bottom, in negative area (32), be provided with simple type baffle plate (321), in simple type baffle plate (321), have guide shell (322) water conservancy diversion.
5. phosphorous acid according to claim 4 is produced continuous crystallisation centrifugation systems, it is characterized in that, is provided with stirring rod (323) in described guide shell (322).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199111.XA CN104071761A (en) | 2014-05-12 | 2014-05-12 | Continuous crystallizing and centrifuging system for producing phosphorous acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199111.XA CN104071761A (en) | 2014-05-12 | 2014-05-12 | Continuous crystallizing and centrifuging system for producing phosphorous acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104071761A true CN104071761A (en) | 2014-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410199111.XA Pending CN104071761A (en) | 2014-05-12 | 2014-05-12 | Continuous crystallizing and centrifuging system for producing phosphorous acid |
Country Status (1)
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| CN (1) | CN104071761A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106542511A (en) * | 2016-09-30 | 2017-03-29 | 无锡市张舍化工有限公司 | A kind of phosphorous acid method for crystallising |
| CN112705142A (en) * | 2020-12-22 | 2021-04-27 | 浙江德立信微纳科技有限公司 | Continuous flow silica sol synthesis device and synthesis method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3873275A (en) * | 1969-09-29 | 1975-03-25 | Whiting Corp | Crystallization apparatus and method |
| US5147625A (en) * | 1990-08-16 | 1992-09-15 | Hoechst Aktiengesellschaft | Process for the preparation of phosphorous acid |
| CN202155067U (en) * | 2011-06-10 | 2012-03-07 | 赵玉斌 | Improved DTB (draft-tube and baffle) type crystallizer |
| CN202246070U (en) * | 2011-06-16 | 2012-05-30 | 江苏大明科技有限公司 | Production system for synthesizing orthophosphorous acid by hydrolyzing phosphorus trichloride |
| CN102580347A (en) * | 2012-03-02 | 2012-07-18 | 浙江金科日化原料有限公司 | Continuous crystallization method of tetraacetylethylenediamine |
| CN203833615U (en) * | 2014-05-12 | 2014-09-17 | 江苏大明科技有限公司 | Continuous crystallizing and centrifuging system for phosphorous acid production |
-
2014
- 2014-05-12 CN CN201410199111.XA patent/CN104071761A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3873275A (en) * | 1969-09-29 | 1975-03-25 | Whiting Corp | Crystallization apparatus and method |
| US5147625A (en) * | 1990-08-16 | 1992-09-15 | Hoechst Aktiengesellschaft | Process for the preparation of phosphorous acid |
| CN202155067U (en) * | 2011-06-10 | 2012-03-07 | 赵玉斌 | Improved DTB (draft-tube and baffle) type crystallizer |
| CN202246070U (en) * | 2011-06-16 | 2012-05-30 | 江苏大明科技有限公司 | Production system for synthesizing orthophosphorous acid by hydrolyzing phosphorus trichloride |
| CN102580347A (en) * | 2012-03-02 | 2012-07-18 | 浙江金科日化原料有限公司 | Continuous crystallization method of tetraacetylethylenediamine |
| CN203833615U (en) * | 2014-05-12 | 2014-09-17 | 江苏大明科技有限公司 | Continuous crystallizing and centrifuging system for phosphorous acid production |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106542511A (en) * | 2016-09-30 | 2017-03-29 | 无锡市张舍化工有限公司 | A kind of phosphorous acid method for crystallising |
| CN106542511B (en) * | 2016-09-30 | 2018-12-21 | 无锡市张舍化工有限公司 | A kind of phosphorous acid method for crystallising |
| CN112705142A (en) * | 2020-12-22 | 2021-04-27 | 浙江德立信微纳科技有限公司 | Continuous flow silica sol synthesis device and synthesis method |
| CN112705142B (en) * | 2020-12-22 | 2022-04-01 | 浙江德立信微纳科技有限公司 | Continuous flow silica sol synthesis device and synthesis method |
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Application publication date: 20141001 |