CN201850141U

CN201850141U - Phosphoric acid purification device

Info

Publication number: CN201850141U
Application number: CN2010206241600U
Authority: CN
Inventors: 王邵东; 李红林; 王平; 吕阳成
Original assignee: Wengfu Group Co Ltd
Current assignee: Wengfu Group Co Ltd
Priority date: 2010-11-25
Filing date: 2010-11-25
Publication date: 2011-06-01
Anticipated expiration: 2020-11-25

Abstract

The utility model discloses a phosphoric acid purification device which comprises an extraction device, a washing device and a back extraction device, wherein the extraction device comprises two groups of emulsifying machines and phase separation devices or one group or a plurality of groups of emulsifying machines and phase separation devices are additionally arranged on the above combination; the washing device comprises two groups of emulsifying machines and phase separation devices or one group or a plurality of groups of emulsifying machines and phase separation devices are additionally arranged on the above combination; and the back extraction device comprises a group of emulsifying machines and phase separation devices and a group of mixers and phase separation devices or one group or a plurality of groups of emulsifying machines and phase separation devices (or mixers and phase separation devices) are additionally arranged on the above combination. A primary solvent inlet of the extraction device is connected with a final-stage light phase outlet of the back extraction device; a primary solvent inlet of the washing device is connected with a final-stage light phase outlet of the extraction device; and a primary solvent inlet of the back extraction device is connected with a final-stage light phase outlet of the washing device. The phosphoric acid purification device has the advantages that the cleaning difficulty of equipment can be reduced, the cleaning time is shortened, the mass transfer performance is strengthened, the purification efficiency is improved and the investment and running costs of the equipment are reduced.

Description

Phosphoric acid purification device

Technical field

The utility model relates to the chemical industry equipment field, relates in particular to a kind of phosphoric acid purification device.

Background technology

Is advanced at present phosphoric acid purification technology with pulse-column as the solvent extraction technology of mass transfer apparatus, and pulse-column mass-transfer efficiency height can be produced high-quality purifying phosphoric acid.But this equipment making expense is higher, and for preventing to reveal, its tower body is generally moulded, the internal cleaning difficulty.In the phosphoric acid extraction process, phosphoric acid contacts with organic solvent anti-phase in extraction tower, and the partial impurities in the phosphoric acid separates out with sedimentary form.Wherein partly precipitated is along with raffinate is discharged outside the tower, and some precipitates and forms the tower dirt on attached long-pending tower wall and the column plate.Along with the lengthening of time, the tower dirt is cumulative, and structure is more and more finer and close.When the tower dirt was accumulated to certain degree, the tower interior passageway stopped up serious, and the Flow of Goods and Materials and the way of contact are changed in the tower, have a strong impact on effect of extracting.Because of tower dirt component complexity, compact structure will be replaced the obnoxious flavour in the tower during with artificial the cleaning, and it is big to clean difficulty, and the time is long and can not clean the dirty piece at tower body middle part.

In washing and back extraction process, considerably less because of the material foreign matter content, the tower dirt amount of generation does not seldom cause detrimentally affect to production substantially.

The rotor of mulser and stator are under the high-speed driving of motor, bear the inferior shearing action of hundreds of thousands of at short notice, because the powerful kinetic energy that high linear speed that the rotor high-speed rotation is produced and high frequency machinery effect belt come, make that material is subjected to intensive machinery and fluid power shearing, centrifugal extruding, liquid layer friction in the accurate gap of stator and rotor, high-speed impact is torn with comprehensive action such as turbulent flow under division, broken, disperse, thereby make immiscible material in the abundant dispersion in moment uniform, fine ground, emulsification, homogeneous, dissolving.Mulser cleans easily and is cheap, and mulser is widely used in fine chemistry industry at present: resin emulsification, silicone oil emulsification, carbon black dispersion, fillers dispersed etc.; Be applied to petrochemical complex: heavy oil emulsive, emulsified bitumen, wax emulsification etc.; Biological medicine: microcapsule emulsification, medicine emulsion, cell tissue fragmentation etc.

Mixing tank has important application in numerous hybrid reactions fields such as chemistry, chemical industry, petrochemical industry, medicine and food.This equipment mass transfer area is big, the reaction conversion ratio height; Cost of equipment is low, and is simple to operate; Regulate single passage width and parallel access volume and accomplish scale production, the device processes amount is big.Chinese patent publication number CN1807277A, disclosed on 02 22nd, 2006 " a kind of multi-channeled micro-structured reactor ", continuous phase fluid enters reactor from the inlet pipe distribution chamber in this reactor, dispersed phase fluid is passed dispersion medium and is entered the external phase parallel channels, under continuous phase fluid flows shear action, be dispersed into fine droplet or bubble, contact, realize short mix and reaction between two-phase fluid with continuous phase fluid.

Summary of the invention

The purpose of this utility model be to overcome above-mentioned shortcoming and provide a kind of can the reinforcing mass transfer performance, improve purification efficiency, reduce the phosphoric acid purification device of facility investment and working cost.

A kind of phosphoric acid purification device of the present utility model, comprise extraction plant, washing device and back extraction device, wherein: extraction plant secondary light phase export is connected with washing device one-level solvent inlet, washing device secondary light phase export is connected with back extraction device one-level solvent inlet, and back extraction device phase splitting device B light phase export is connected with extraction plant one-level solvent inlet;

Extraction plant comprises extraction plant one-level mulser and extraction plant one-level phase splitting device, extraction plant secondary mulser and extraction plant secondary phase splitting device, extraction plant one-level mulser is provided with the import of extraction plant one-level mulser, the outlet of extraction plant one-level mulser, collection device one-level phase splitting device is provided with the import of extraction plant one-level mixed phase, extraction plant one-level heavy out and extraction plant one-level light phase export, the import of extraction plant one-level mulser is connected with extraction plant one-level solvent inlet with the import of extraction plant one-level phosphoric acid, and the outlet of extraction plant one-level mulser is connected with the import of extraction plant one-level phase splitting device mixed phase; Extraction plant secondary mulser is provided with the import of extraction plant secondary mulser, the outlet of extraction plant secondary mulser, collection device secondary phase splitting device is provided with the import of extraction plant secondary mixed phase, extraction plant secondary heavy out and extraction plant secondary light phase export, import is connected the import of extraction plant secondary mulser with the extraction plant secondary solvent with the import of extraction plant secondary phosphoric acid, and the outlet of extraction plant secondary mulser is connected with the import of extraction plant secondary mixed phase; Extraction plant one-level light phase export is connected with the import of extraction plant secondary solvent; Extraction plant secondary light phase export is connected with washing device one-level solvent inlet, and extraction plant secondary heavy out (is connected with the import of extraction plant one-level phosphoric acid;

Washing device comprises washing device one-level mulser and washing device one-level phase splitting device, washing device secondary mulser and washing device secondary phase splitting device, washing device one-level mulser is provided with the import of washing device one-level mulser, the outlet of washing device one-level mulser, washing device one-level phase splitting device is provided with the import of washing device one-level mixed phase, washing device one-level heavy out and washing device one-level light phase export, the import of washing device one-level mulser is connected with washing device one-level solvent inlet with the import of washing device one-level phosphoric acid, and the outlet of washing device one-level mulser is connected with the import of washing device one-level mixed phase; Washing device secondary mulser is provided with the import of washing device secondary mulser, the outlet of washing device secondary mulser, washing device secondary phase splitting device is provided with the import of washing device secondary mixed phase, washing device secondary heavy out and washing device secondary light phase export, import is connected the import of washing device secondary mulser with the washing device secondary solvent with the import of washing device secondary phosphoric acid, and the outlet of washing device secondary mulser is connected with the import of washing device secondary mixed phase; Washing device one-level light phase export is connected with the import of washing device secondary solvent, washing device secondary heavy out be connected the import of washing device one-level phosphoric acid;

Back extraction device comprises back extraction device mulser A and back extraction device phase splitting device A, back extraction device mixing tank A and back extraction device phase splitting device B; Back extraction device mulser A is provided with back extraction device mulser A import, back extraction device mulser A outlet, back extraction device phase splitting device A is provided with the import of back extraction device phase splitting device A mixed phase, back extraction device phase splitting device A heavy out and back extraction device phase splitting device A light phase export, back extraction device mulser A import is connected with back extraction device one-level solvent inlet with the import of back extraction device one-level phosphoric acid, and back extraction device mulser A outlet is connected with the import of back extraction device phase splitting device A mixed phase; Back extraction device mixing tank A is provided with the import of back extraction device mixing tank A external phase, back extraction device mixing tank A disperse phase import and the outlet of back extraction device mixing tank A mixed phase, back extraction device phase splitting device B is provided with the import of back extraction device phase splitting device B mixed phase, back extraction device phase splitting device B light phase export and back extraction device phase splitting device B heavy out, and the outlet of back extraction device mixing tank A mixed phase is connected with the import of back extraction device phase splitting device B mixed phase; Back extraction device phase splitting device A light phase export is connected with the import of back extraction device mixing tank A external phase, and back extraction device phase splitting device B heavy out is connected with the import of back extraction device one-level phosphoric acid;

Above-mentioned phosphoric acid purification device, wherein: extraction plant comprises three grades of mulsers of extraction plant and three grades of phase-splitting equipment of extraction plant, three grades of mulsers of extraction plant are provided with three grades of mulser imports of extraction plant and three grades of mulser outlets of extraction plant, three grades of phase-splitting equipment of extraction plant are provided with three grades of mixed phase imports of extraction plant, three grades of heavy outs of extraction plant and three grades of light phase exports of extraction plant, three grades of phosphoric acid imports of three grades of mulser imports of extraction plant and extraction plant are connected with three grades of solvent inlets of extraction plant, and three grades of mulser outlets of extraction plant are connected with three grades of mixed phase imports of extraction plant; Three grades of light phase exports of extraction plant are connected with washing device one-level solvent inlet, and three grades of heavy outs of extraction plant are connected with the import of extraction plant secondary phosphoric acid, and three grades of solvent inlets of extraction plant secondary light phase export and extraction plant are connected;

Washing device comprises three grades of mulsers of washing device and three grades of phase-splitting equipment of washing device, three grades of mulsers of washing device are provided with three grades of mulser imports of washing device and three grades of mulser outlets of washing device, three grades of phase-splitting equipment of washing device are provided with three grades of mixed phase imports of washing device, three grades of heavy outs of washing device and three grades of light phase exports of washing device, three grades of phosphoric acid imports of three grades of mulser imports of washing device and washing device are connected with three grades of solvent inlets of washing device, and three grades of mulser outlets of washing device are connected with three grades of mixed phase imports of washing device; Three grades of light phase exports of washing device are connected with back extraction device one-level solvent inlet, and three grades of heavy outs of washing device are connected with the import of washing device secondary phosphoric acid, and three grades of solvent inlets of washing device secondary light phase export and washing device are connected;

Back extraction device comprises back extraction device mulser B and extraction plant phase splitting device C, back extraction device mulser B is provided with B import of back extraction device mulser and back extraction device mulser B outlet, back extraction device phase splitting device C is provided with the import of back extraction device phase splitting device C mixed phase, back extraction device phase splitting device C heavy out and back extraction device phase splitting device C light phase export, three grades of phosphoric acid imports of back extraction device mulser B import and back extraction device are connected with three grades of solvent inlets of back extraction device, and back extraction device mulser B outlet is connected with the import of back extraction device phase splitting device C mixed phase; Back extraction device phase splitting device C light phase export is connected with extraction plant one-level solvent inlet, back extraction device phase splitting device C heavy out is connected with the import of back extraction device mixing tank A disperse phase, and three grades of solvent inlets of back extraction device phase splitting device B light phase export and back extraction device are connected.

Back extraction device comprises back extraction device mixing tank B and back extraction device phase splitting device D, and back extraction device mixing tank B is provided with the import of back extraction device mixing tank B external phase, back extraction device mixing tank B disperse phase import and the outlet of back extraction device mixing tank B mixed phase; Back extraction device phase splitting device D is provided with the import of back extraction device phase splitting device D mixed phase, back extraction device phase splitting device D light phase export and back extraction device phase splitting device D heavy out, and the outlet of back extraction device mixing tank B mixed phase is connected with the import of back extraction device phase splitting device D mixed phase; Back extraction device phase splitting device B light phase export is connected with the import of back extraction device mixing tank B external phase, back extraction device phase splitting device D heavy out is connected with the import of back extraction device mixing tank A disperse phase, and back extraction device phase splitting device D light phase export is connected with extraction plant one-level solvent inlet.

Above-mentioned phosphoric acid purification device, wherein: phase splitting device is the equipment that phase-splitting groove or clarifying tank etc. reach the phase-splitting purpose.

Above-mentioned phosphoric acid purification device, wherein: mulser divides mulser for the pipeline high-shear.

The utility model compared with prior art as can be known from the above technical solutions, requires difference according to purifying, and wherein: extraction plant comprises two groups of mulsers and phase splitting device, or increases one or more groups mulser and phase splitting device on aforesaid combination; Two groups of mulsers of washing device and phase splitting device, or on aforesaid combination, increase one or more groups mulser and phase splitting device; Back extraction device comprises one group of mulser and phase splitting device and one group of mixing tank and phase splitting device, or increases one or more groups mulser and phase splitting device (or mixing tank and phase splitting device) on aforesaid combination.In the phosphoric acid purification process, feed phosphoric acid (fresh phosphoric) adds by the import of extraction plant final stage phosphoric acid, washing acid (purifying phosphoric acid) adds by the import of washing device final stage phosphoric acid, and de-salted water adds by back extraction device final stage phosphoric acid import (or the import of final stage disperse phase).The no-load solvent of extraction plant one-level solvent inlet is from the final stage phase splitting device light phase export of back extraction device, the loaded solvent of washing device one-level solvent inlet is from extraction plant final stage light phase export, and the loaded solvent of back extraction device one-level solvent inlet is from washing device final stage light phase export.Because mulser, mixing tank mass transfer area are big, the mass-transfer efficiency height.Extraction plant selects for use mulser as mass transfer apparatus, and the dirty thing that extraction process produces cleans easily, and the equipment easy switching does not influence production.The mixed solution that comes out from mulser, mixing tank is easy to phase-splitting, thereby guarantees to divide phase effect.The purifying phosphoric acid foreign matter content that obtains is low, but by refining production food grade and electron-level phosphoric acid.Mulser, mixing tank cost are low, can save facility investment.

Description of drawings

Fig. 1 is embodiment 1 structural representation;

Fig. 2 is embodiment 2 structural representations;

Fig. 3 is embodiment 3 structural representations.

Mark among the figure:

1, extraction plant one-level mulser, 2, extraction plant one-level phase splitting device, 3, the import of extraction plant one-level mulser, 4, the outlet of extraction plant one-level mulser, 5, the import of extraction plant one-level mixed phase, 6, extraction plant one-level heavy out, 7, extraction plant one-level light phase export, 8, the import of extraction plant one-level phosphoric acid, 9, extraction plant one-level solvent inlet, 10, extraction plant secondary mulser, 11, extraction plant secondary phase splitting device, 12, the import of extraction plant secondary mulser, 13, the outlet of extraction plant secondary mulser, 14, the import of extraction plant secondary mixed phase, 15, extraction plant secondary heavy out, 16, extraction plant secondary light phase export, 17, the import of extraction plant secondary phosphoric acid, 18, the import of extraction plant secondary solvent, 19, three grades of mulsers of extraction plant, 20, three grades of phase-splitting equipment of extraction plant, 21, three grades of mulser imports of extraction plant, 22, three grades of mulser outlets of extraction plant, 23, three grades of mixed phase imports of extraction plant, 24, three grades of heavy outs of extraction plant, 25, three grades of light phase exports of extraction plant, 26, three grades of phosphoric acid imports of extraction plant, 27, three grades of solvent inlets of extraction plant, 28, washing device one-level mulser, 29, washing device one-level phase splitting device, 30, the import of washing device one-level mulser, 31, the outlet of washing device one-level mulser, 32, the import of washing device one-level mixed phase, 33, washing device one-level heavy out, 34, washing device one-level light phase export, 35, the import of washing device one-level phosphoric acid, 36, washing device one-level solvent inlet, 37, washing device secondary mulser, 38, washing device secondary phase splitting device, 39, the import of washing device secondary mulser, 40, the outlet of washing device secondary mulser, 41, the import of washing device secondary mixed phase, 42, washing device secondary heavy out, 43, washing device secondary light phase export, 44, the import of washing device secondary phosphoric acid, 45, the import of washing device secondary solvent, 46, three grades of mulsers of washing device, 47, three grades of phase-splitting equipment of washing device, 48, three grades of mulser imports of washing device, 49, three grades of mulser outlets of washing device, 50, three grades of mixed phase imports of washing device, 51, three grades of heavy outs of washing device, 52, three grades of light phase exports of washing device, 53, three grades of phosphoric acid imports of washing device, 54, three grades of solvent inlets of washing device, 55, back extraction device mulser A, 56, back extraction device phase splitting device A, 57, back extraction device mulser A import, 58, back extraction device mulser A outlet, 59, the import of back extraction device phase splitting device A mixed phase, 60, back extraction device phase splitting device A heavy out, 61, back extraction device phase splitting device A light phase export, 62, the import of back extraction device one-level phosphoric acid, 63, back extraction device one-level solvent inlet, 64, back extraction device mixing tank A, 65, back extraction device phase splitting device B, 66, the import of back extraction device mixing tank A external phase, 67, the import of back extraction device mixing tank A disperse phase, 68, the outlet of back extraction device mixing tank A mixed phase, 69, the import of back extraction device phase splitting device B mixed phase, 70, back extraction device phase splitting device B heavy out, 71, back extraction device phase splitting device B light phase export, 72, back extraction device mulser B, 73, extraction plant phase splitting device C, 74, back extraction device mulser B import, 75, back extraction device mulser B outlet, 76, the import of back extraction device phase splitting device C mixed phase, 77, back extraction device phase splitting device C heavy out, 78, back extraction device phase splitting device C light phase export, 79, three grades of phosphoric acid imports of back extraction device, 80, three grades of solvent inlets of back extraction device, 81, back extraction device mixing tank B, 82, back extraction device phase splitting device D, 83, the import of back extraction device mixing tank B external phase, 84, the import of back extraction device mixing tank B disperse phase, 85, the outlet of back extraction device mixing tank B mixed phase, 86, the import of back extraction device phase splitting device D mixed phase, 87, back extraction device phase splitting device D heavy out, 88, back extraction device phase splitting device D light phase export.

Embodiment

Below in conjunction with accompanying drawing, its embodiment of phosphoric acid purification device, structure, feature and effect thereof to foundation the utility model proposes are described in detail as follows:

Embodiment 1

Referring to Fig. 1, adopt the phosphoric acid purification device of secondary extraction, washing and back extraction, comprise extraction plant, washing device and back extraction device, wherein: extraction plant secondary light phase export 16 is connected with washing device one-level solvent inlet 36, washing device secondary light phase export 43 is connected with back extraction device one-level solvent inlet 63, and back extraction device phase splitting device B light phase export 71 is connected with extraction plant one-level solvent inlet 9;

Extraction plant comprises extraction plant one-level mulser 1 and extraction plant one-level phase splitting device 2, extraction plant secondary mulser 10 and extraction plant secondary phase splitting device 11, extraction plant one-level mulser 1 is provided with extraction plant one-level mulser import 3, extraction plant one-level mulser outlet 4, collection device one-level phase splitting device 2 is provided with extraction plant one-level mixed phase import 5, extraction plant one-level heavy out 6 and extraction plant one-level light phase export 7, extraction plant one-level mulser import 3 is connected with extraction plant one-level solvent inlet 9 with extraction plant one-level phosphoric acid import 8, and extraction plant one-level mulser outlet 4 is connected with extraction plant one-level phase splitting device mixed phase import 5; Extraction plant secondary mulser 10 is provided with extraction plant secondary mulser import 12, extraction plant secondary mulser outlet 13, collection device secondary phase splitting device 11 is provided with extraction plant secondary mixed phase import 14, extraction plant secondary heavy out 15 and extraction plant secondary light phase export 16, extraction plant secondary mulser import 12 is connected with extraction plant secondary solvent import 18 with extraction plant secondary phosphoric acid import 17, and extraction plant secondary mulser outlet 13 is connected with extraction plant secondary mixed phase import 14; Extraction plant one-level light phase export 7 is connected with extraction plant secondary solvent import 18; Extraction plant secondary light phase export 16 is connected with washing device one-level solvent inlet 36, and extraction plant secondary heavy out 15 is connected with extraction plant one-level phosphoric acid import 8;

Washing device comprises washing device one-level mulser 28 and washing device one-level phase splitting device 29, washing device secondary mulser 37 and washing device secondary phase splitting device 38, washing device one-level mulser 28 is provided with washing device one-level mulser import 30, washing device one-level mulser outlet 31, washing device one-level phase splitting device 29 is provided with washing device one-level mixed phase import 32, washing device one-level heavy out 33 and washing device one-level light phase export 34, washing device one-level mulser import 30 is connected with washing device one-level solvent inlet 36 with washing device one-level phosphoric acid import 35, and washing device one-level mulser outlet 31 is connected with washing device one-level mixed phase import 32; Washing device secondary mulser 37 is provided with washing device secondary mulser import 39, washing device secondary mulser outlet 40, washing device secondary phase splitting device 38 is provided with washing device secondary mixed phase import 41, washing device secondary heavy out 42 and washing device secondary light phase export 43, washing device secondary mulser import 39 is connected with washing device secondary solvent import 45 with washing device secondary phosphoric acid import 44, and washing device secondary mulser outlet 40 is connected with washing device secondary mixed phase import 41; Washing device one-level light phase export 34 is connected with washing device secondary solvent import 45, washing device secondary heavy out 42 be connected washing device one-level phosphoric acid import 35;

Back extraction device comprises back extraction device mulser A55 and back extraction device phase splitting device A56, back extraction device mixing tank A64 and back extraction device phase splitting device B65; Back extraction device mulser A55 is provided with back extraction device mulser A import 57, back extraction device mulser A outlet 58, back extraction device phase splitting device A56 is provided with back extraction device phase splitting device A mixed phase import 59, back extraction device phase splitting device A heavy out 60 and back extraction device phase splitting device A light phase export 61, back extraction device mulser A import 57 is connected with back extraction device one-level solvent inlet 63 with back extraction device one-level phosphoric acid import 62, and back extraction device mulser A outlet 58 is connected with back extraction device phase splitting device A mixed phase import 59; Back extraction device mixing tank A64 is provided with back extraction device mixing tank A external phase import 66, back extraction device mixing tank A disperse phase import 67 and back extraction device mixing tank A mixed phase outlet 68, back extraction device phase splitting device B65 is provided with back extraction device phase splitting device B mixed phase import 69, back extraction device phase splitting device B light phase export 71 and back extraction device phase splitting device B heavy out 70, and back extraction device mixing tank A mixed phase outlet 68 is connected with back extraction device phase splitting device B mixed phase import 69; Back extraction device phase splitting device A light phase export 61 is connected with back extraction device mixing tank A external phase import 66, and back extraction device phase splitting device B heavy out 70 is connected with back extraction device one-level phosphoric acid import 62;

During use: at extraction plant, the phosphoric acid that comes out from extraction plant secondary heavy out 15 under the effect of pump from extraction plant one-level phosphoric acid import 8, extraction agent (from the no-load solvent of back extraction device phase splitting device B light phase export 71) all enters extraction plant one-level mulser 1 by extraction plant one-level mulser import 3 from extraction plant one-level solvent inlet 9, extraction agent and phosphoric acid are finished the efficient mass transfer process in extraction plant one-level mulser 1, the mixed phase that forms comes out from extraction plant one-level mulser outlet 4, enters extraction plant one-level phase splitting device 2 by extraction plant one-level phase splitting device mixed phase import 5.In extraction plant one-level phase splitting device 2, realize the layering of mixed phase, light, the heavy two-phase of formation.Impurity in the phosphoric acid enters heavy phase becomes raffinate from 6 discharges of extraction plant one-level heavy out, phosphoric acid is extracted agent extraction to be become loaded solvent and comes out from extraction plant one-level light phase export 7, under the effect of pump through extraction plant secondary solvent import 18, all enter extraction plant secondary mulser 10 with feed phosphoric acid (fresh phosphoric) through extraction plant secondary phosphoric acid import 17 by extraction plant secondary mulser import 12, efficient mass transfer effect by extraction plant secondary mulser 10, further improve the phosphoric acid extraction rate, the mixed phase that forms comes out from extraction plant secondary mulser outlet 13, enter extraction plant secondary phase splitting device 11 by extraction plant secondary phase splitting device mixed phase import 14, in extraction plant secondary phase splitting device 11, realize the layering of mixed phase, what form is light, heavy two-phase, most of phosphoric acid is extracted the agent extraction and enters and gently form loaded solvent mutually and come out to enter washing device from extraction plant secondary light phase export 16, heavy phase is then returned extraction plant one-level mulser 1 by extraction plant secondary heavy out 15, thereby realizes extracting and separating.

At washing device, the phosphoric acid that comes out from washing device secondary heavy out 42 under the effect of pump from washing device one-level phosphoric acid import 35, solvent all enters washing device one-level mulser 28 by washing device mulser import 30 from the loaded solvent of extraction plant secondary light phase export 16 from washing device one-level solvent inlet 36, loaded solvent and washing acid are finished the efficient mass transfer process in washing device one-level mulser 28, the mixed phase that forms comes out from washing device one-level mulser outlet 31, enters washing device one-level phase splitting device 29 by washing device one-level mixed phase import 32.In washing device one-level phase splitting device 29, realize the layering of mixed phase, light, the heavy two-phase of formation.Impurity in the loaded solvent enters heavy phase to be become and washes spent acid and discharge from washing device one-level heavy out 33, loaded solvent is washed and becomes the wash load solvent behind the acid elution and come out from washing device one-level light phase export 34, under the effect of pump through washing device secondary solvent import 45, all enter washing device secondary mulser 37 with washing acid through washing device secondary phosphoric acid import 44 by washing device secondary mulser import 39, efficient mass transfer effect by washing device secondary mulser 37, further improve the washing rate of impurity, the mixed phase that forms comes out from washing device secondary mulser outlet 40, enter washing device secondary phase splitting device 38 by washing device secondary phase splitting device mixed phase import 41, in washing device secondary phase splitting device 38, realize the layering of mixed phase, what form is light, heavy two-phase, loaded solvent is washed acid elution and enters and gently form the wash load solvent mutually and come out to enter back extraction device from washing device secondary light phase export 43, heavy phase is then come out by washing device secondary heavy out 42, under the effect of pump, return washing device one-level mulser 28, thereby realize washing, purifying.

At back extraction device, the phosphoric acid that comes out from back extraction device phase splitting device B heavy out 70 under the effect of pump from back extraction device one-level phosphoric acid import 62, solvent all enters back extraction device mulser A55 by back extraction device mulser A import 57 from the loaded solvent of washing device secondary light phase export 43 from back extraction device one-level solvent inlet 63, loaded solvent and reverse-extraction agent are finished the efficient mass transfer process in back extraction device mulser A55, the mixed phase that forms comes out from back extraction device mulser A outlet 58, enters back extraction device phase splitting device A56 by back extraction device phase splitting device A mixed phase import 59.In back extraction device phase splitting device A56, realize the layering of mixed phase, light, the heavy two-phase of formation.Phosphoric acid in the loaded solvent enters heavy phase becomes back extraction acid from 60 discharges of back extraction device phase splitting device A heavy out, loaded solvent becomes the back extraction loaded solvent that contains small amounts of phosphoric acid after by the reverse-extraction agent back extraction and comes out from back extraction device phase splitting device A light phase export 61, under the effect of pump, enter back extraction device mixing tank A external phase import 66, reverse-extraction agent adds from back extraction device mixing tank A disperse phase import 67, reverse-extraction agent contacts in mixing tank with loaded solvent, fully come out from back extraction device mixing tank A mixed phase outlet 68 behind the mass transfer, enter back extraction device phase splitting device B65 by back extraction device phase splitting device B mixed phase import 69, in back extraction device phase splitting device B65, realize the layering of mixed phase, what form is light, heavy two-phase, phosphoric acid in the loaded solvent enters the bottom that heavy phase sinks to phase splitting device, enters back extraction device one-level phosphoric acid import 62 under the effect of pump.Become the top that no-load solvent rises to neutral section by the loaded solvent after the reverse-extraction agent back extraction, come out to return extraction plant, realize the recycle of extraction agent from back extraction device phase splitting device B light phase export 71.

Embodiment 2

Referring to Fig. 2, adopt three grades of extractions, the phosphoric acid purification device of washing and back extraction, comprise extraction plant, washing device and back extraction device, wherein: extraction plant comprises three grades of mulsers 19 of extraction plant and three grades of phase-splitting equipment 20 of extraction plant, three grades of mulsers 19 of extraction plant are provided with three grades of mulser imports 21 of extraction plant and three grades of mulser outlets 22 of extraction plant, three grades of phase-splitting equipment 20 of extraction plant are provided with three grades of mixed phase imports 23 of extraction plant, three grades of heavy outs 24 of extraction plant and three grades of light phase exports 25 of extraction plant, three grades of phosphoric acid imports 26 of three grades of mulser imports 21 of extraction plant and extraction plant are connected with three grades of solvent inlets 27 of extraction plant, and three grades of mulsers of extraction plant outlet 22 is connected with three grades of mixed phase imports 23 of extraction plant; Three grades of light phase exports 25 of extraction plant are connected with washing device one-level solvent inlet 36, and three grades of heavy outs 24 of extraction plant are connected with extraction plant secondary phosphoric acid import 17, and three grades of solvent inlets 27 of extraction plant secondary light phase export 16 and extraction plant are connected;

Washing device comprises three grades of mulsers 46 of washing device and three grades of phase-splitting equipment 47 of washing device, three grades of mulsers 46 of washing device are provided with three grades of mulser imports 48 of washing device and three grades of mulser outlets 49 of washing device, three grades of phase-splitting equipment 47 of washing device are provided with three grades of mixed phase imports 50 of washing device, three grades of heavy outs 51 of washing device and three grades of light phase exports 52 of washing device, three grades of phosphoric acid imports 53 of three grades of mulser imports 48 of washing device and washing device are connected with three grades of solvent inlets 54 of washing device, and three grades of mulsers of washing device outlet 49 is connected with three grades of mixed phase imports 50 of washing device; Three grades of light phase exports 52 of washing device are connected with back extraction device one-level solvent inlet 63, and three grades of heavy outs 51 of washing device are connected with washing device secondary phosphoric acid import 44, and three grades of solvent inlets 54 of washing device secondary light phase export 43 and washing device are connected;

Back extraction device comprises back extraction device mulser B72 and extraction plant phase splitting device C73, back extraction device mulser B72 is provided with back extraction device mulser B import 74 and back extraction device mulser B outlet 75, back extraction device phase splitting device C73 is provided with back extraction device phase splitting device C mixed phase import 76, back extraction device phase splitting device C heavy out 77 and back extraction device phase splitting device C light phase export 78, three grades of phosphoric acid imports 79 of back extraction device mulser B import 74 and back extraction device are connected with three grades of solvent inlets 80 of back extraction device, and back extraction device mulser B outlet 75 is connected with back extraction device phase splitting device C mixed phase import 76; Back extraction device phase splitting device C light phase export 78 is connected with extraction plant one-level solvent inlet 9, back extraction device phase splitting device C heavy out 77 is connected with back extraction device mixing tank A disperse phase import 67, and three grades of solvent inlets 80 of back extraction device phase splitting device B light phase export 71 and back extraction device are connected.

All the other are with embodiment 1.

During use, at extraction plant, the phosphoric acid that comes out from extraction plant secondary phase splitting device heavy out 15 under the effect of pump from extraction plant one-level phosphoric acid import 8, extraction agent (from the no-load solvent of three grades of phase-splitting equipment of back extraction device light phase export) all enters extraction plant one-level mulser 1 by extraction plant one-level mulser import 3 from extraction plant one-level solvent inlet 9, extraction agent and phosphoric acid are finished the efficient mass transfer process in extraction plant one-level mulser 1, the mixed phase that forms comes out from extraction plant one-level mulser outlet 4, enters extraction plant one-level phase splitting device 2 by extraction plant one-level phase splitting device mixed phase import 5.In extraction plant one-level phase splitting device 2, realize the layering of mixed phase, light, the heavy two-phase of formation.Impurity in the phosphoric acid enters heavy phase becomes raffinate from 6 discharges of extraction plant one-level heavy out, phosphoric acid is extracted agent extraction to be become loaded solvent and comes out from extraction plant one-level light phase export 7, under the effect of pump through extraction plant secondary solvent import 18, all enter extraction plant secondary mulser 10 with the phosphoric acid that comes out from three grades of phase-splitting equipment of extraction plant heavy out 24 through extraction plant secondary mulser phosphoric acid import 17 by extraction plant secondary mulser import 12, efficient mass transfer effect by extraction plant secondary mulser 10, further improve the phosphoric acid extraction rate, the mixed phase that forms comes out from extraction plant secondary mulser outlet 13, enter extraction plant secondary phase splitting device 11 by extraction plant secondary phase splitting device mixed phase import 14, in extraction plant secondary phase splitting device 11, realize the layering of mixed phase, what form is light, heavy two-phase, heavy phase is then returned extraction plant one-level mulser 1 by extraction plant secondary heavy out 15, most of phosphoric acid is extracted the agent extraction and enters and gently form loaded solvent mutually and come out from extraction plant secondary light phase export 16, under the effect of pump from three grades of mulser solvent inlets 27 of extraction plant, all enter three grades of mulsers 19 of extraction plant with feed phosphoric acid (fresh phosphoric) through three grades of phosphoric acid imports 26 of extraction plant by three grades of mulser imports 21 of extraction plant, efficient mass transfer effect by three grades of mulsers 19 of extraction plant, further improve the phosphoric acid extraction rate, the mixed phase that forms comes out from three grades of mulser outlets 22 of extraction plant, enter three grades of phase-splitting equipment 20 of extraction plant by three grades of phase-splitting equipment of extraction plant mixed phase import 23, in three grades of phase-splitting equipment 20 of extraction plant, realize the layering of mixed phase, what form is light, heavy two-phase, most of phosphoric acid is extracted the agent extraction and enters and gently form loaded solvent mutually and come out to enter washing device from three grades of phase-splitting equipment of extraction plant light phase export 25, heavy phase is then returned extraction plant secondary mulser 10 by three grades of phase-splitting equipment of extraction plant heavy out 24, thereby realizes extracting and separating.

At washing device, the phosphoric acid that comes out from washing device secondary heavy out 42 under the effect of pump from washing device one-level phosphoric acid import 35, solvent all enters washing device one-level mulser 28 by washing device mulser import 30 from the loaded solvent of three grades of phase-splitting equipment of extraction plant light phase export 25 from washing device one-level solvent inlet 36, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device one-level mulser 28, the mixed phase that forms comes out from washing device one-level mulser outlet 31, enters washing device one-level phase splitting device 29 by washing device one-level mixed phase import 32.In washing device one-level phase splitting device 29, realize the layering of mixed phase, light, the heavy two-phase of formation.Impurity in the loaded solvent enters heavy phase to be become and washes spent acid and discharge from washing device one-level heavy out 33, loaded solvent comes out from washing device one-level light phase export 34 after being washed acid elution, under the effect of pump through washing device secondary solvent import 45, all enter washing device secondary mulser 37 with washing acid through washing device secondary phosphoric acid import 44 by washing device secondary mulser import 39, efficient mass transfer effect by washing device secondary mulser 37, further improve the washing rate of impurity, the mixed phase that forms comes out from washing device secondary mulser outlet 40, enter washing device secondary phase splitting device 38 by washing device secondary phase splitting device mixed phase import 41, in washing device secondary phase splitting device 38, realize the layering of mixed phase, what form is light, heavy two-phase, loaded solvent is washed acid elution and enters and gently form the wash load solvent mutually and come out from washing device secondary light phase export 43, under the effect of pump through three grades of solvent inlets 54 of washing device, all enter three grades of mulsers 46 of washing device with washing acid through three grades of phosphoric acid imports 53 of washing device by three grades of mulser imports 48 of washing device, efficient mass transfer effect by three grades of mulsers 46 of washing device, further improve the washing rate of impurity, the mixed phase that forms comes out from three grades of mulser outlets 49 of washing device, enter three grades of phase-splitting equipment 47 of washing device by three grades of phase-splitting equipment of washing device mixed phase import 50, in three grades of phase-splitting equipment 47 of washing device, realize the layering of mixed phase, what form is light, heavy two-phase, loaded solvent is washed acid elution and enters and gently form the wash load solvent mutually and come out from three grades of phase-splitting equipment of washing device light phase export 52, enter back extraction device, heavy phase is then come out by three grades of phase-splitting equipment of washing device heavy out 51, under the effect of pump, return washing device secondary mulser 37, thereby realize washing, purifying.

At back extraction device, the phosphoric acid that comes out from back extraction device phase splitting device B heavy out 70 under the effect of pump from back extraction device one-level phosphoric acid import 62, solvent all enters back extraction device mulser A55 by back extraction device mulser A import 57 from the loaded solvent of three grades of phase-splitting equipment of washing device light phase export 52 from back extraction device one-level solvent inlet 63, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mulser A55, the mixed phase that forms comes out from back extraction device mulser A outlet 58, enters back extraction device phase splitting device A56 by back extraction device phase splitting device A mixed phase import 59.In back extraction device phase splitting device A56, realize the layering of mixed phase, light, the heavy two-phase of formation.Phosphoric acid in the loaded solvent enters heavy phase becomes back extraction acid from 60 discharges of back extraction device phase splitting device A heavy out, loaded solvent becomes the back extraction loaded solvent that contains small amounts of phosphoric acid after by back extraction and comes out from back extraction device phase splitting device A light phase export 61, under the effect of pump, enter back extraction device mixing tank A external phase import 66, reverse-extraction agent adds from back extraction device mixing tank A disperse phase import 67, reverse-extraction agent contacts in mixing tank with loaded solvent, fully come out from back extraction device mixing tank A mixed phase outlet 68 behind the mass transfer, enter back extraction device phase splitting device B65 by back extraction device phase splitting device B mixed phase import 69, in back extraction device phase splitting device B65, realize the layering of mixed phase, what form is light, heavy two-phase, phosphoric acid in the loaded solvent enters the bottom that heavy phase sinks to phase splitting device, after in phase splitting device, leaving standstill phase-splitting, under the effect of pump, return back extraction device mulser A55.Risen at the top of neutral section by the loaded solvent after the reverse-extraction agent back extraction, come out from back extraction device phase splitting device B light phase export 71, under the effect of pump from three grades of solvent inlets 80 of back extraction device, the reverse-extraction agent of coming in three grades of phosphoric acid imports 79 of back extraction device all enters back extraction device mulser B72 by back extraction device mulser B import 74, loaded solvent and reverse-extraction agent are finished the efficient mass transfer process in back extraction device mulser B72, the mixed phase that forms comes out from back extraction device mulser B outlet 75, enters back extraction device phase splitting device C73 by back extraction device phase splitting device C mixed phase import 76.In back extraction device phase splitting device C73, realize the layering of mixed phase, light, the heavy two-phase of formation.Phosphoric acid in the loaded solvent enters heavy phase and discharges from back extraction device heavy out 77, under the effect of pump, return back extraction device mixing tank A64, loaded solvent becomes no-load solvent after by the reverse-extraction agent back extraction and comes out from back extraction device phase splitting device C light phase export 78, under the effect of pump, return extraction plant, realize the recycle of extraction agent.

Embodiment 3

Referring to Fig. 3, adopt three grades of extractions, the phosphoric acid purification device of washing and back extraction, comprise extraction plant, washing device and back extraction device, wherein: extraction plant comprises three grades of mulsers 19 of extraction plant and three grades of phase-splitting equipment 20 of extraction plant, three grades of mulsers 19 of extraction plant are provided with three grades of mulser imports 21 of extraction plant and three grades of mulser outlets 22 of extraction plant, three grades of phase-splitting equipment 20 of extraction plant are provided with three grades of mixed phase imports 23 of extraction plant, three grades of heavy outs 24 of extraction plant and three grades of light phase exports 25 of extraction plant, three grades of phosphoric acid imports 26 of three grades of mulser imports 21 of extraction plant and extraction plant are connected with three grades of solvent inlets 27 of extraction plant, and three grades of mulsers of extraction plant outlet 22 is connected with three grades of mixed phase imports 23 of extraction plant; Three grades of light phase exports 25 of extraction plant are connected with washing device one-level solvent inlet 36, and three grades of heavy outs 24 of extraction plant are connected with extraction plant secondary phosphoric acid import 17, and three grades of solvent inlets 27 of extraction plant secondary light phase export 16 and extraction plant are connected;

Back extraction device comprises back extraction device mixing tank B81 and back extraction device phase splitting device D82, back extraction device mixing tank B81 is provided with back extraction device mixing tank B external phase import 83, back extraction device mixing tank B disperse phase import 84 and back extraction device mixing tank B mixed phase outlet 85; Back extraction device phase splitting device D82 is provided with back extraction device phase splitting device D mixed phase import 86, back extraction device phase splitting device D light phase export 88 and back extraction device phase splitting device D heavy out 87, and back extraction device mixing tank B mixed phase outlet 85 is connected with back extraction device phase splitting device D mixed phase import 86; Back extraction device phase splitting device B light phase export 71 is connected with back extraction device mixing tank B external phase import 83, back extraction device phase splitting device D heavy out 87 is connected with back extraction device mixing tank A disperse phase import 67, and back extraction device phase splitting device D light phase export 88 is connected with extraction plant one-level solvent inlet 9.

During use, at extraction plant, with embodiment 2.

At washing device, with embodiment 2.

At back extraction device, the phosphoric acid that comes out from back extraction device phase splitting device B heavy out 70 under the effect of pump from back extraction device one-level phosphoric acid import 62, solvent all enters back extraction device mulser A55 by back extraction device mulser A import 57 from the loaded solvent of three grades of phase-splitting equipment of washing device light phase export 52 from back extraction device one-level solvent inlet 63, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mulser A55, the mixed phase that forms comes out from back extraction device mulser A outlet 58, enters back extraction device phase splitting device A56 by back extraction device phase splitting device A mixed phase import 59.In back extraction device phase splitting device A56, realize the layering of mixed phase, light, the heavy two-phase of formation.Phosphoric acid in the loaded solvent enters heavy phase becomes back extraction acid from 60 discharges of back extraction device phase splitting device A heavy out, loaded solvent becomes the back extraction loaded solvent that contains small amounts of phosphoric acid after by back extraction and comes out from back extraction device phase splitting device A light phase export 61, under the effect of pump, enter back extraction device mixing tank A external phase import 66, reverse-extraction agent adds from back extraction device mixing tank A disperse phase import 67, reverse-extraction agent contacts in mixing tank with loaded solvent, fully come out from back extraction device mixing tank A mixed phase outlet 68 behind the mass transfer, enter back extraction device phase splitting device B65 by back extraction device phase splitting device B mixed phase import 69, in back extraction device phase splitting device B65, realize the layering of mixed phase, what form is light, heavy two-phase, phosphoric acid in the loaded solvent enters the bottom that heavy phase sinks to phase splitting device, after in phase splitting device, leaving standstill phase-splitting, under the effect of pump, return back extraction device mulser A55.Become the top that the solvent that contains small amounts of phosphoric acid rises to phase splitting device by the loaded solvent after the reverse-extraction agent back extraction, come out from light phase export 71, under the effect of pump, enter back extraction device mixing tank B external phase import 83, reverse-extraction agent adds from back extraction device mixing tank B disperse phase import 84, reverse-extraction agent contacts in mixing tank with loaded solvent, fully come out from back extraction device mixing tank B mixed phase outlet 85 behind the mass transfer, enter back extraction device phase splitting device D82 by back extraction device phase splitting device D mixed phase import 86, in back extraction device phase splitting device D82, realize the layering of mixed phase, what form is light, heavy two-phase, phosphoric acid in the loaded solvent enters the bottom that heavy phase sinks to phase splitting device, enters the disperse phase import 67 of back extraction device mixing tank A under the effect of pump.Become the top that no-load solvent rises to phase splitting device by the loaded solvent after the reverse-extraction agent back extraction, come out, under the effect of pump, return extraction plant, realize the recycle of extraction agent from back extraction device phase splitting device D light phase export 88.

More than among three embodiment: mulser adopts the pipeline high-shearing dispersion emulsifying machine; Phase splitting device adopts phase-splitting groove, clarifying tank etc. to reach the equipment of phase-splitting purpose; Mixing tank adopts Chinese patent publication number CN1807277A, open day: on 02 22nd, 2006, disclosed " a kind of multi-channeled micro-structured reactor ".

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, any technical solutions of the utility model content that do not break away from,, all still belong in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present utility model.

Claims

1. phosphoric acid purification device, comprise extraction plant, washing device and back extraction device, it is characterized in that: extraction plant secondary light phase export (16) is connected with washing device one-level solvent inlet (36), washing device secondary light phase export (43) is connected with back extraction device one-level solvent inlet (63), and back extraction device phase splitting device B light phase export (71) is connected with extraction plant one-level solvent inlet (9);

Extraction plant comprises extraction plant one-level mulser (1) and extraction plant one-level phase splitting device (2), extraction plant secondary mulser (10) and extraction plant secondary phase splitting device (11), extraction plant one-level mulser (1) is provided with extraction plant one-level mulser import (3), extraction plant one-level mulser outlet (4), collection device one-level phase splitting device (2) is provided with extraction plant one-level mixed phase import (5), extraction plant one-level heavy out (6) and extraction plant one-level light phase export (7), extraction plant one-level mulser import (3) is connected with extraction plant one-level solvent inlet (9) with extraction plant one-level phosphoric acid import (8), and extraction plant one-level mulser outlet (4) is connected with extraction plant one-level phase splitting device mixed phase import (5); Extraction plant secondary mulser (10) is provided with extraction plant secondary mulser import (12), extraction plant secondary mulser outlet (13), collection device secondary phase splitting device (11) is provided with extraction plant secondary mixed phase import (14), extraction plant secondary heavy out (15) and extraction plant secondary light phase export (16), extraction plant secondary mulser import (12) is connected with extraction plant secondary solvent import (18) with extraction plant secondary phosphoric acid import (17), and extraction plant secondary mulser outlet (13) is connected with extraction plant secondary mixed phase import (14); Extraction plant one-level light phase export (7) is connected with extraction plant secondary solvent import (18); Extraction plant secondary light phase export (16) is connected with washing device one-level solvent inlet (36), and (15 are connected with extraction plant one-level phosphoric acid import (8) extraction plant secondary heavy out;

Washing device comprises washing device one-level mulser (28) and washing device one-level phase splitting device (29), washing device secondary mulser (37) and washing device secondary phase splitting device (38), washing device one-level mulser (28) is provided with washing device one-level mulser import (30), washing device one-level mulser outlet (31), washing device one-level phase splitting device (29) is provided with washing device one-level mixed phase import (32), washing device one-level heavy out (33) and washing device one-level light phase export (34), washing device one-level mulser import (30) is connected with washing device one-level solvent inlet (36) with washing device one-level phosphoric acid import (35), and washing device one-level mulser outlet (31) is connected with washing device one-level mixed phase import (32); Washing device secondary mulser (37) is provided with washing device secondary mulser import (39), washing device secondary mulser outlet (40), washing device secondary phase splitting device (38) is provided with washing device secondary mixed phase import (41), washing device secondary heavy out (42) and washing device secondary light phase export (43), washing device secondary mulser import (39) is connected with washing device secondary solvent import (45) with washing device secondary phosphoric acid import (44), and washing device secondary mulser outlet (40) is connected with washing device secondary mixed phase import (41); Washing device one-level light phase export (34) is connected with washing device secondary solvent import (45), washing device secondary heavy out (42) be connected washing device one-level phosphoric acid import (35);

Back extraction device comprises back extraction device mulser A (55) and back extraction device phase splitting device A (56), back extraction device mixing tank A (64) and back extraction device phase splitting device B (65); Back extraction device mulser A (55) is provided with back extraction device mulser A import (57), back extraction device mulser A exports (58), back extraction device phase splitting device A (56) is provided with back extraction device phase splitting device A mixed phase import (59), back extraction device phase splitting device A heavy out (60) and back extraction device phase splitting device A light phase export (61), back extraction device mulser A import (57) is connected with back extraction device one-level solvent inlet (63) with back extraction device one-level phosphoric acid import (62), and back extraction device mulser A outlet (58) is connected with back extraction device phase splitting device A mixed phase import (59); Back extraction device mixing tank A (64) is provided with back extraction device mixing tank A external phase import (66), back extraction device mixing tank A disperse phase import (67) and back extraction device mixing tank A mixed phase outlet (68), back extraction device phase splitting device B (65) is provided with back extraction device phase splitting device B mixed phase import (69), back extraction device phase splitting device B light phase export (71) and back extraction device phase splitting device B heavy out (70), and back extraction device mixing tank A mixed phase outlet (68) is connected with back extraction device phase splitting device B mixed phase import (69); Back extraction device phase splitting device A light phase export (61) is connected with back extraction device mixing tank A external phase import (66), and back extraction device phase splitting device B heavy out (70) is connected with back extraction device one-level phosphoric acid import (62).

2. phosphoric acid purification device as claimed in claim 1 is characterized in that:

Extraction plant comprises three grades of mulsers of extraction plant (19) and three grades of phase-splitting equipment of extraction plant (20), three grades of mulsers of extraction plant (19) are provided with three grades of mulser imports of extraction plant (21) and three grades of mulser outlets of extraction plant (22), three grades of phase-splitting equipment of extraction plant (20) are provided with three grades of mixed phase imports of extraction plant (23), three grades of light phase exports of three grades of heavy outs of extraction plant (24) and extraction plant (25), three grades of mulser imports of extraction plant (21) are connected with three grades of solvent inlets of three grades of phosphoric acid imports of extraction plant (26) and extraction plant (27), and three grades of mulser outlets of extraction plant (22) are connected with three grades of mixed phase imports of extraction plant (23); Three grades of light phase exports of extraction plant (25) are connected with washing device one-level solvent inlet (36), three grades of heavy outs of extraction plant (24) are connected with extraction plant secondary phosphoric acid import (17), and extraction plant secondary light phase export (16) is connected with three grades of solvent inlets of extraction plant (27);

Washing device comprises three grades of mulsers of washing device (46) and three grades of phase-splitting equipment of washing device (47), three grades of mulsers of washing device (46) are provided with three grades of mulser imports of washing device (48) and three grades of mulser outlets of washing device (49), three grades of phase-splitting equipment of washing device (47) are provided with three grades of mixed phase imports of washing device (50), three grades of light phase exports of three grades of heavy outs of washing device (51) and washing device (52), three grades of mulser imports of washing device (48) are connected with three grades of solvent inlets of three grades of phosphoric acid imports of washing device (53) and washing device (54), and three grades of mulser outlets of washing device (49) are connected with three grades of mixed phase imports of washing device (50); Three grades of light phase exports of washing device (52) are connected with back extraction device one-level solvent inlet (63), three grades of heavy outs of washing device (51) are connected with washing device secondary phosphoric acid import (44), and washing device secondary light phase export (43) is connected with three grades of solvent inlets of washing device (54);

Back extraction device comprises back extraction device mulser B (72) and extraction plant phase splitting device C (73), back extraction device mulser B (72) is provided with back extraction device mulser B import (74) and back extraction device mulser B outlet (75), back extraction device phase splitting device C (73) is provided with back extraction device phase splitting device C mixed phase import (76), back extraction device phase splitting device C heavy out (77) and back extraction device phase splitting device C light phase export (78), back extraction device mulser B import (74) is connected with three grades of solvent inlets of three grades of phosphoric acid imports of back extraction device (79) and back extraction device (80), and back extraction device mulser B outlet (75) is connected with back extraction device phase splitting device C mixed phase import (76); Back extraction device phase splitting device C light phase export (78) is connected with extraction plant one-level solvent inlet (9), back extraction device phase splitting device C heavy out (77) is connected with back extraction device mixing tank A disperse phase import (67), and back extraction device phase splitting device B light phase export (71) is connected with three grades of solvent inlets of back extraction device (80).

3. phosphoric acid purification device as claimed in claim 1 is characterized in that:

Back extraction device comprises back extraction device mixing tank B (81) and back extraction device phase splitting device D (82), back extraction device mixing tank B (81) is provided with back extraction device mixing tank B external phase import (83), back extraction device mixing tank B disperse phase import (84) and back extraction device mixing tank B mixed phase outlet (85); Back extraction device phase splitting device D (82) is provided with back extraction device phase splitting device D mixed phase import (86), back extraction device phase splitting device D light phase export (88) and back extraction device phase splitting device D heavy out (87), and back extraction device mixing tank B mixed phase outlet (85) is connected with back extraction device phase splitting device D mixed phase import (86); Back extraction device phase splitting device B light phase export (71) is connected with back extraction device mixing tank B external phase import (83), back extraction device phase splitting device D heavy out (87) is connected with back extraction device mixing tank A disperse phase import (67), and back extraction device phase splitting device D light phase export (88) is connected with extraction plant one-level solvent inlet (9).

4. as the described phosphoric acid purification device of one of claim 1-3, wherein: phase splitting device is phase-splitting groove or clarifying tank.

5. as the described phosphoric acid purification device of one of claim 1-3, wherein: mulser is the pipeline high-shearing dispersion emulsifying machine.