CN201427864Y

CN201427864Y - Phosphoric acid purification device

Info

Publication number: CN201427864Y
Application number: CN2009201254902U
Authority: CN
Inventors: 王邵东; 李红林; 吕阳成; 冉瑞泉
Original assignee: Wengfu Group Co Ltd
Current assignee: Wengfu Group Co Ltd
Priority date: 2009-06-26
Filing date: 2009-06-26
Publication date: 2010-03-24
Anticipated expiration: 2019-06-26

Abstract

The utility model discloses a phosphoric acid purification device which comprises an extraction device, a cleaning device and a back-extraction device, and selects a combination of a group of emulsifying machines and phase separation facilities and a group of mixers and phase separation facilities, or multiple stages formed by additionally arranging one or more groups of emulsifying machines and phase separation facilities (or mixers and phase separation facilities) on the combination. A one-stage solvent inlet of the extraction device is connected with a final-stage light phase outlet of theback-extraction device; a one-stage solvent inlet of the cleaning device is connected with a final-stage light phase outlet of the extraction device; and a one-stage solvent inlet of the back-extraction device is connected with a final-stage light phase outlet of the cleaning device. Due to the adoption of the phosphoric acid purification device, the mass transfer performance can be enhanced, thepurification efficiency is improved, the facility investment and the operation cost are reduced, and the occupied area is small.

Description

Phosphoric acid purification device

Technical field

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

Background technology

Realize that with solvent extraction technology phosphoric acid purification is a phosphoric acid purification technology commonly used at present, solvent extraction technology generally comprises extraction, washing, reaches the back extraction operation.The chemical industry equipment that can realize extraction, washing, back extraction function at present is mainly as follows: multistage mixing-clarifying tank, it is a kind of typically contact liquid liquid mass transfer apparatus step by step, wherein every grade comprises mixing tank and clarifying tank two portions, this equipment main drawback has: horizontal multistage mixing-tempering tank floor space is bigger, be equipped with whipping appts in each level, fluid generally needs to use pump delivery flowing of inter-stage, and cost of equipment and process cost are all bigger; Sieve-tray tower, the weight two-phase is made counter-current flow in tower, and two-phase is the cross-flow contact on every block of column plate, and this tower mass-transfer efficiency is than higher, but its internal structure is complicated, and manufacturing cost is higher, the internal cleaning difficulty; Packing tower, the packing tower structure is simple relatively, but efficient is lower, can not be used to have the material of solid particulate and easy fouling; Pulsed packed tower and pulsed sieve plate column, in order to improve the two-phase contact condition, the reinforcing mass transfer process, add mechanical energy causing pulsation at packing tower and sieve-tray tower, and the generation of pulsation is realized by reciprocation pump or pressurized air usually, this kind equipment mass-transfer efficiency height, but manufacturing cost is higher, the internal cleaning difficulty, and working cost is higher; Sieve plate is fixed on the central shaft in the oscillating screen plate tower, oscillating screen plate tower, is driven by toggle, and this tower is limited by equipment material, and it is very difficult to maximize, and working cost is higher.

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 CN1736577A, disclosed on 02 22nd, 2006 " a kind of multi-channeled micro-structured reactor ", continuous phase fluid enters reactor from the inlet tube 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.

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 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.

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 facility investment and working cost and the little phosphoric acid purification device of floor space.

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

Extraction plant comprises extraction plant mulser A and extraction plant phase splitting device A, extraction plant mixing tank A and extraction plant phase splitting device B, extraction plant mulser A import is connected with import of extraction plant phosphoric acid and extraction plant solvent inlet, and extraction plant mulser A outlet is connected with the import of extraction plant mixed phase; The outlet of extraction plant mixing tank A mixed phase fluid is connected with the import of extraction plant phase splitting device B mixed phase, and the extraction plant light phase export is connected with extraction plant mixing tank A continuous phase fluid inlet by the pipeline that is provided with pump; Extraction plant phase splitting device B heavy out is connected with the import of extraction plant phosphoric acid by the pipeline that is provided with pump;

Washing device comprises washing device mulser A and washing device phase splitting device A, washing device mixing tank A and washing device phase splitting device B, washing device mulser A import is connected with import of washing device phosphoric acid and washing device solvent inlet, and washing device mulser A outlet is connected with the import of washing device mixed phase; The outlet of washing device mixing tank A mixed phase fluid is connected with the import of washing device phase splitting device B mixed phase, the washing device light phase export is connected with washing device mixing tank A continuous phase fluid inlet by the pipeline that is provided with pump, and washing device phase splitting device B heavy out is connected with the import of washing device phosphoric acid by the pipeline that is provided with pump;

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 import is connected with import of back extraction device phosphoric acid and back extraction device solvent inlet, and back extraction device mulser A outlet is connected with the import of back extraction device mixed phase; The outlet of back extraction device mixing tank A mixed phase fluid is connected with the import of back extraction device phase splitting device B mixed phase, and the back extraction device light phase export is connected with back extraction device mixing tank A continuous phase fluid inlet by the pipeline that is provided with pump; Back extraction device phase-splitting groove B heavy out is connected with the import of back extraction device phosphoric acid by the pipeline that is provided with pump, and back extraction device phase splitting device B light phase export is connected with the extraction plant solvent inlet.

Above-mentioned phosphoric acid purification device, wherein: extraction plant comprises extraction plant mulser B and extraction plant phase splitting device C, three grades of phosphoric acid imports of extraction plant mulser B import and extraction plant and three grades of solvent inlets of extraction plant are connected, and extraction plant mulser B outlet is connected with the import of extraction plant phase splitting device C mixed phase; Extraction plant phase splitting device B light phase export is connected by the three grades of solvent inlets of pipeline and extraction plant that are provided with pump, extraction plant phase splitting device C heavy out is connected with extraction plant mixing tank A dispersed phase fluid inlet by the pipeline that is provided with pump, and extraction plant phase splitting device C light phase export is connected with the washing device solvent inlet;

Washing device comprises washing device mulser B and washing device phase splitting device C, three grades of phosphoric acid imports of washing device mulser B import and washing device and three grades of solvent inlets of washing device are connected, and washing device mulser B outlet is connected with the import of washing device phase splitting device C mixed phase; Washing device phase splitting device B light phase export is connected by the three grades of solvent inlets of pipeline and washing device that are provided with pump, washing device phase splitting device C heavy out is connected with washing device mixing tank A dispersed phase fluid inlet by the pipeline that is provided with pump, and washing device phase splitting device C light phase export is connected with the back extraction device solvent inlet;

Back extraction device comprises back extraction device mulser B and back extraction device phase splitting device C, three grades of phosphoric acid imports of back extraction device mulser B import and back extraction device and three grades of solvent inlets of back extraction device are connected, 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 B light phase export is connected by the three grades of solvent inlets of pipeline and back extraction device that are provided with pump, back extraction device phase splitting device C heavy out is connected with back extraction device mixing tank A dispersed phase fluid inlet by the pipeline that is provided with pump, and back extraction device phase splitting device C light phase export is connected with the extraction plant solvent inlet.

Above-mentioned phosphoric acid purification device, wherein: extraction plant comprises extraction plant mixing tank B and extraction plant phase splitting device D, the outlet of extraction plant mixing tank B mixed phase fluid is connected with the import of extraction plant phase splitting device D mixed phase; Phase splitting device B light phase export is connected with mixing tank B continuous phase fluid inlet by the pipeline that is provided with pump, phase splitting device D heavy out is connected with mixing tank A dispersed phase fluid inlet by the pipeline that is provided with pump, and phase splitting device D light phase export is connected with the washing device solvent inlet;

Washing device comprises washing device mixing tank B and washing device phase splitting device D, the outlet of washing device mixing tank B mixed phase fluid is connected with the import of washing device phase splitting device D mixed phase, washing device phase splitting device B light phase export is connected with washing device mixing tank B continuous phase fluid inlet by the pipeline that is provided with pump, washing device phase splitting device D heavy out is connected with washing device mixing tank A dispersed phase fluid inlet by the pipeline that is provided with pump, and washing device phase splitting device D light phase export is connected with the back extraction device solvent inlet;

Back extraction device comprises back extraction device mixing tank B and back extraction device phase splitting device D, the outlet of back extraction device mixing tank B mixed phase fluid 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 back extraction device phase splitting device C heavy out by the pipeline that is provided with pump, back extraction device phase splitting device D heavy out is connected with back extraction device mixing tank A dispersed phase fluid inlet by the pipeline that is provided with pump, and back extraction device phase splitting device D light phase export is connected with the extraction plant solvent inlet.

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

Above-mentioned phosphoric acid purification device, wherein: mulser is the pipeline high-shearing dispersion emulsifying machine.

The utility model compared with prior art, as can be known from the above technical solutions, require difference according to purifying, constitute extraction plant, washing device and the back extraction device of phosphoric acid purification device, select the combination of one group of mulser and phase splitting device and one group of mixing tank and phase splitting device for use, or on aforesaid combination, increase multistage that one or more groups mulser and phase splitting device (or mixing tank and phase splitting device) constitute.In the phosphoric acid purification process, feed phosphoric acid (fresh phosphoric) is all added by final stage back extraction device mixer disperses phase fluid inlet by washing device mixer disperses phase fluid inlet, de-salted water by final stage extraction plant mixer disperses phase fluid inlet, washing acid (purifying phosphoric acid), the no-load solvent of extraction plant one-level solvent inlet is from back extraction device final stage light phase export, 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.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.System's material loading level is little, avoids hazardous material (fluids) (as phosphoric acid, organic extractant) to leak in a large number and the peace ring accident that causes; Mulser, mixing tank floor space are little, and appliance arrangement is arranged simple, and factory building can be realized miniaturization; 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 mulser A, 2, extraction plant phase splitting device A, 3, extraction plant mulser A import, 4, extraction plant mulser A outlet, 5, the import of extraction plant mixed phase, 6, the extraction plant heavy out, 7, the extraction plant light phase export, 8, the import of extraction plant phosphoric acid, 9, the extraction plant solvent inlet, 10, extraction plant mixing tank A, 11, extraction plant phase splitting device B, 12, extraction plant mixing tank A continuous phase fluid inlet, 13, extraction plant mixing tank A dispersed phase fluid inlet, 14, the outlet of extraction plant mixing tank A mixed phase fluid, 15, the import of extraction plant phase splitting device B mixed phase, 16, extraction plant phase splitting device B light phase export, 17, extraction plant phase splitting device B heavy out, 18, extraction plant mulser B, 19, extraction plant phase splitting device C, 20, extraction plant mulser B import, 21, extraction plant mulser B outlet, 22, the import of extraction plant phase splitting device C mixed phase, 23, extraction plant phase splitting device C heavy out, 24, extraction plant phase splitting device C light phase export, 25, three grades of phosphoric acid imports of extraction plant, 26, three grades of solvent inlets of extraction plant, 27, extraction plant mixing tank B, 28, extraction plant phase splitting device D, 29, extraction plant mixing tank B continuous phase fluid inlet, 30, extraction plant mixing tank B dispersed phase fluid inlet, 31, the outlet of extraction plant mixing tank B mixed phase fluid, 32, the import of extraction plant phase splitting device D mixed phase, 33, extraction plant phase splitting device D light phase export, 34, extraction plant phase splitting device D heavy out, 35, washing device mulser A, 36, washing device phase splitting device A, 37, washing device mulser A import, 38, washing device mulser A outlet, 39, the import of washing device mixed phase, 40, the washing device heavy out, 41, the washing device light phase export, 42, the import of washing device phosphoric acid, 43, the washing device solvent inlet, 44, washing device mixing tank A, 45, washing device phase splitting device B, 46, washing device mixing tank A continuous phase fluid inlet, 47, washing device mixing tank A dispersed phase fluid inlet, 48, the outlet of washing device mixing tank A mixed phase fluid, 49, the import of washing device phase splitting device B mixed phase, 50, washing device phase splitting device B light phase export, 51, washing device phase splitting device B heavy out, 52, washing device mulser B, 53, washing device phase splitting device C, 54, washing device mulser B import, 55, washing device mulser B outlet, 56, the import of washing device phase splitting device C mixed phase, 57, washing device phase splitting device C heavy out, 58, washing device phase splitting device C light phase export, 59, three grades of phosphoric acid imports of washing device, 60, three grades of solvent inlets of washing device, 61, washing device mixing tank B, 62, washing device phase splitting device D, 63, washing device mixing tank B continuous phase fluid inlet, 64, washing device mixing tank B dispersed phase fluid inlet, 65, the outlet of washing device mixing tank B mixed phase fluid, 66, the import of washing device phase splitting device D mixed phase, 67, washing device phase splitting device D light phase export, 68, washing device phase splitting device D heavy out, 69, back extraction device mulser A, 70, back extraction device phase splitting device A, 71, back extraction device mulser A import, 72, back extraction device mulser A outlet, 73, the import of back extraction device mixed phase, 74, the back extraction device heavy out, 75, the back extraction device light phase export, 76, the import of back extraction device phosphoric acid, 77, the back extraction device solvent inlet, 78, back extraction device mixing tank A, 79, back extraction device phase splitting device B, 80, back extraction device mixing tank A continuous phase fluid inlet, 81, back extraction device mixing tank A dispersed phase fluid inlet, 82, the outlet of back extraction device mixing tank A mixed phase fluid, 83, the import of back extraction device phase splitting device B mixed phase, 84, back extraction device phase splitting device B light phase export, 85, back extraction device phase-splitting groove B heavy out, 86, back extraction device mulser B, 87, back extraction device phase splitting device C, 88, back extraction device mulser B import, 89, back extraction device mulser B outlet, 90, the import of back extraction device phase splitting device C mixed phase, 91, back extraction device phase splitting device C heavy out, 92, back extraction device phase splitting device C light phase export, 93, three grades of phosphoric acid imports of back extraction device, 94, three grades of solvent inlets of back extraction device, 95, back extraction device mixing tank B, 96, back extraction device phase splitting device D, 97, back extraction device mixing tank B continuous phase fluid inlet, 98, back extraction device mixing tank B dispersed phase fluid inlet, 99, the outlet of back extraction device mixing tank B mixed phase fluid, 100, the import of back extraction device phase splitting device D mixed phase, 101, back extraction device phase splitting device D light phase export, 102, back extraction device phase splitting device D heavy out.

Embodiment

Below in conjunction with accompanying drawing, its embodiment of extraction plant, 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 two-stage extraction, washing and back extraction, comprise extraction plant, washing device and back extraction device, wherein: extraction plant phase splitting device B light phase export 16 is connected with washing device solvent inlet 43, washing device phase splitting device B light phase export 50 is connected with back extraction device solvent inlet 77, and back extraction device phase splitting device B light phase export 84 is connected with extraction plant solvent inlet 9;

Extraction plant comprises extraction plant mulser A1 and extraction plant phase splitting device A2, extraction plant mixing tank A10 and extraction plant phase splitting device B11, extraction plant mulser A import 3 is connected with extraction plant phosphoric acid import 8 and extraction plant solvent inlet 9, and extraction plant mulser A outlet 4 is connected with extraction plant mixed phase import 5; Extraction plant mixing tank A mixed phase fluid outlet 14 is connected with extraction plant phase splitting device B mixed phase import 15, and the pipeline of extraction plant light phase export 7 by being provided with pump and extraction plant mixing tank A continuous phase fluid enter the mouth and 12 be connected; Extraction plant phase splitting device B heavy out 17 is connected with extraction plant phosphoric acid import 8 by the pipeline that is provided with pump;

Washing device comprises washing device mulser A35 and washing device phase splitting device A36, washing device mixing tank A44 and washing device phase splitting device B45, washing device mulser A import 37 is connected with washing device phosphoric acid import 42 and washing device solvent inlet 43, and washing device mulser A outlet 38 is connected with washing device mixed phase import 39; Washing device mixing tank A mixed phase fluid outlet 48 is connected with washing device phase splitting device B mixed phase import 49, washing device light phase export 41 is connected with washing device mixing tank A continuous phase fluid inlet 46 by the pipeline that is provided with pump, and washing device phase splitting device B heavy out 51 is connected with washing device phosphoric acid import 42 by the pipeline that is provided with pump;

Back extraction device comprises back extraction device mulser A69 and back extraction device phase splitting device A70, back extraction device mixing tank A78 and back extraction device phase splitting device B79, back extraction device mulser A import 71 is connected with back extraction device phosphoric acid import 76 and back extraction device solvent inlet 77, and back extraction device mulser A outlet 72 is connected with back extraction device mixed phase import 73; Back extraction device mixing tank A mixed phase fluid outlet 82 is connected with back extraction device phase splitting device B mixed phase import 83, and the pipeline of back extraction device light phase export 75 by being provided with pump and back extraction device mixing tank A continuous phase fluid enter the mouth and 80 be connected; Back extraction device phase-splitting groove B heavy out 85 is connected with back extraction device phosphoric acid import 76 by the pipeline that is provided with pump, and back extraction device phase splitting device B light phase export 84 is connected with extraction plant solvent inlet 9.

During use: at extraction plant, the phosphoric acid that comes out from extraction plant phase splitting device B heavy out 17 all enters extraction plant mulser A1 by extraction plant mulser import 3 from extraction plant phosphoric acid import 8, extraction agent (from the no-load solvent of back extraction device phase splitting device B light phase export 84) from extraction plant solvent inlet 9 under the effect of pump, extraction agent and phosphoric acid are finished the efficient mass transfer process in extraction plant mulser A1, the mixed phase that forms comes out from extraction plant mulser A outlet 4, enters extraction plant phase splitting device A2 by extraction plant mixed phase import 5.In extraction plant phase splitting device A2, 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 heavy out, phosphoric acid is extracted agent extraction to be become loaded solvent and comes out from extraction plant light phase export 7, enters extraction plant mixing tank A10 through extraction plant mixing tank A continuous phase fluid inlet 12 under the effect of pump; Feed phosphoric acid (fresh phosphoric) enters extraction plant mixing tank A10 through extraction plant mixing tank A dispersed phase fluid inlet 13, efficient mass transfer effect by extraction plant mixing tank A10, further improve the phosphoric acid extraction rate, the mixed phase that forms comes out from extraction plant mixing tank A mixed phase fluid outlet 14, enter extraction plant phase splitting device B11 by extraction plant phase splitting device B mixed phase import 15, in extraction plant phase splitting device B11, 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 enter washing device solvent inlet 43 from extraction plant phase splitting device B light phase export 16, heavy phase is then returned extraction plant mulser A1 by extraction plant phase splitting device B heavy out 17, thereby realizes extracting and separating.

At washing device, the phosphoric acid that comes out from washing device phase splitting device B heavy out 51 under the effect of pump from washing device phosphoric acid import 42, all enter washing device mulser A35 from washing device solvent inlet 43 by washing device mulser import 37 from the loaded solvent of extraction plant phase splitting device light phase export 16, extraction agent and phosphoric acid are finished the efficient mass transfer process in washing device mulser A35, the mixed phase that forms comes out from washing device mulser A outlet 38, enters washing device phase splitting device A36 by mixed phase import 39.In washing device phase splitting device A36, realize the layering of mixed phase, light, the heavy two-phase of formation.Impurity in the phosphoric acid enters heavy phase becomes raffinate from 40 discharges of washing device heavy out, phosphoric acid is extracted agent extraction to be become loaded solvent and comes out from washing device light phase export 41, enters washing device mixing tank A44 through washing device mixing tank A continuous phase fluid inlet 46 under the effect of pump; Washing acid (purifying phosphoric acid) enters washing device mixing tank A44 through washing device mixing tank A dispersed phase fluid inlet 47, efficient mass transfer effect by washing device mixing tank A44, further improve the phosphoric acid extraction rate, the mixed phase that forms comes out from washing device mixing tank A mixed phase fluid outlet 48, enter washing device phase splitting device B45 by washing device phase splitting device B mixed phase import 49, in washing device phase splitting device B45, 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 enter back extraction device solvent inlet 77 from washing device phase splitting device B light phase export 50, heavy phase is then returned washing device mulser A35 by washing device phase splitting device B heavy out 51, thereby realizes extracting and separating.

At back extraction device, the phosphoric acid that comes out from back extraction device phase splitting device B heavy out 85 under the effect of pump from back extraction device phosphoric acid import 76, all enter back extraction device mulser A69 from back extraction device solvent inlet 77 by back extraction device mulser import 71 from the loaded solvent of washing device phase splitting device light phase export 50, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mulser A69, the mixed phase that forms comes out from back extraction device mulser A outlet 72, enters back extraction device phase splitting device A70 by back extraction device mixed phase import 73.In back extraction device phase splitting device A70, realize the layering of mixed phase, light, the heavy two-phase of formation.Phosphoric acid in the loaded solvent enters heavy phase becomes purifying phosphoric acid from 74 discharges of back extraction device heavy out, the loaded solvent that also contains part phosphoric acid comes out from back extraction device light phase export 75, enters back extraction device mixing tank A78 through back extraction device mixing tank A continuous phase fluid inlet 80 under the effect of pump; De-salted water enters back extraction device mixing tank A78 through back extraction device mixing tank A dispersed phase fluid inlet 81, efficient mass transfer effect by back extraction device mixing tank A78, further improve the back extraction effect, the mixed phase that forms comes out from back extraction device mixing tank A mixed phase fluid outlet 82, enter back extraction device phase splitting device B79 by back extraction device phase splitting device B mixed phase import 83, in back extraction device phase splitting device B79, realize the layering of mixed phase, what form is light, heavy two-phase, heavy phase is then returned back extraction device mulser A69 by back extraction device phase splitting device B heavy out 85, loaded solvent is desalted and becomes no-load solvent after the water back extraction and enter extraction plant solvent inlet 9 from back extraction device phase splitting device B light phase export 84, realizes the recycle of extraction agent.

Embodiment 2

Referring to Fig. 2, adopt the phosphoric acid purification device of three grades of extractions, washing and back extractions, comprise extraction plant, washing device and back extraction device, wherein: extraction plant comprises extraction plant mulser B 18 and extraction plant phase splitting device C19, three grades of phosphoric acid imports 25 of extraction plant mulser B import 20 and extraction plant and three grades of solvent inlets 26 of extraction plant are connected, and extraction plant mulser B outlet 21 is connected with extraction plant phase splitting device C mixed phase import 22; Extraction plant phase splitting device B light phase export 16 is connected by the three grades of solvent inlets 26 of pipeline and extraction plant that are provided with pump, extraction plant phase splitting device C heavy out 23 is connected with extraction plant mixing tank A dispersed phase fluid inlet 13 by the pipeline that is provided with pump, and extraction plant phase splitting device C light phase export 24 is connected with washing device solvent inlet 43;

Washing device comprises washing device mulser B52 and washing device phase splitting device C53, three grades of phosphoric acid imports 59 of washing device mulser B import 54 and washing device and three grades of solvent inlets 60 of washing device are connected, and washing device mulser B outlet 55 is connected with washing device phase splitting device C mixed phase import 56; Washing device phase splitting device B light phase export 50 is connected by the three grades of solvent inlets 60 of pipeline and washing device that are provided with pump, washing device phase splitting device C heavy out 57 is connected with washing device mixing tank A dispersed phase fluid inlet 47 by the pipeline that is provided with pump, and washing device phase splitting device C light phase export 58 is connected with back extraction device solvent inlet 77;

Back extraction device comprises back extraction device mulser B86 and back extraction device phase splitting device C87, three grades of phosphoric acid imports 93 of back extraction device mulser B import 88 and back extraction device and three grades of solvent inlets 94 of back extraction device are connected, and back extraction device mulser B outlet 89 is connected with back extraction device phase splitting device C mixed phase import 90; Back extraction device phase splitting device B light phase export 84 is connected by the three grades of solvent inlets 94 of pipeline and back extraction device that are provided with pump, back extraction device phase splitting device C heavy out 91 is connected with back extraction device mixing tank A dispersed phase fluid inlet 81 by the pipeline that is provided with pump, back extraction device phase splitting device C light phase export 92 is connected with extraction plant solvent inlet 9, and all the other are with embodiment 1.

During use, at extraction plant, the phosphoric acid that extraction plant phase splitting device C heavy out 23 comes out returns extraction plant mixing tank A10 under the effect of pump; Loaded solvent from extraction plant phase splitting device B light phase export 16 come out, under the effect of pump through three grades of solvent inlets 26 of extraction plant, feed phosphoric acid (fresh phosphoric) enters extraction plant mulser B18 through three grades of phosphoric acid imports 25 of extraction plant by extraction plant mulser B import 20; The mixed phase that forms comes out from extraction plant mulser B outlet 21, enter extraction plant phase splitting device C19 by extraction plant phase splitting device C mixed phase import 22, in extraction plant phase splitting device C19, realize the layering of mixed phase, light, the heavy two-phase that forms, most of phosphoric acid are extracted the agent extraction and enter and gently form loaded solvent mutually and come out to enter washing device from extraction plant phase splitting device C light phase export 24; Heavy phase is then returned extraction plant mixing tank A10 by extraction plant phase splitting device C heavy out 23, with of the efficient mass transfer effect of extraction plant mixing tank A continuous phase fluid inlet 12 loaded solvents that enter by extraction plant mixing tank A10, the mixed phase that forms comes out from extraction plant mixing tank A mixed phase fluid outlet 14, enter extraction plant phase splitting device B11 by extraction plant phase splitting device B mixed phase import 15, in extraction plant phase splitting device B11, 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 enter extraction plant mulser B18 from extraction plant phase splitting device B light phase export 16, heavy phase is then returned extraction plant phosphoric acid import 8 by extraction plant phase splitting device B heavy out 17, extraction agent (from the no-load solvent of back extraction device extraction plant phase splitting device extraction plant light phase export 92) all enters extraction plant mulser A1 by extraction plant mulser A import 3 from extraction plant solvent inlet 9, extraction agent and phosphoric acid are finished the efficient mass transfer process in extraction plant mulser A1, the mixed phase that forms comes out from extraction plant mulser A outlet 4, enters extraction plant phase splitting device A2 by extraction plant mixed phase import 5.In extraction plant phase splitting device A2, 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 heavy out.Phosphoric acid is extracted agent extraction to be become loaded solvent and comes out from extraction plant light phase export 7, enters extraction plant mixing tank A10 through extraction plant mixing tank A continuous phase fluid inlet 12 under the effect of pump.

At washing device, the phosphoric acid that washing device phase splitting device C heavy out 57 comes out returns washing device mixing tank A44 under the effect of pump; Loaded solvent from washing device phase splitting device B light phase export 50 come out, under the effect of pump through three grades of solvent inlets 60 of washing device, washing acid (purifying phosphoric acid) enters washing device mulser B52 through three grades of phosphoric acid imports 59 of washing device by washing device mulser B import 54; The mixed phase that forms comes out from washing device mulser B outlet 55, enter washing device phase splitting device C53 by washing device phase splitting device C mixed phase import 56, in washing device phase splitting device C53, realize the layering of mixed phase, light, the heavy two-phase that forms, by phosphoric acid washing loaded solvent come out to enter back extraction device from washing device phase splitting device C light phase export 58; Heavy phase is then returned washing device mixing tank A44 by washing device phase splitting device C heavy out 57, with washing device mixing tank A continuous phase fluid inlet 46 loaded solvents that enter, efficient mass transfer effect by washing device mixing tank A44, the mixed phase that forms comes out from washing device mixing tank A mixed phase fluid outlet 48, enter washing device phase splitting device B45 by washing device phase splitting device B mixed phase import 49, in washing device phase splitting device B45, realize the layering of mixed phase, what form is light, heavy two-phase, by phosphoric acid washing loaded solvent enter washing device mulser B52 from washing device phase splitting device B light phase export 50, heavy phase is then returned washing device mulser A phosphoric acid import 42 by washing device phase splitting device B heavy out 51, loaded solvent from extraction plant all enters washing device mulser A35 by washing device mulser import 37 from washing device solvent inlet 43, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device mulser A35, the mixed phase that forms comes out from washing device mulser outlet 38, enters washing device phase splitting device 36 by washing device mixed phase import 39.In washing device phase splitting device 36, 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 heavy out 40.By phosphoric acid washing loaded solvent come out from washing device light phase export 41, under the effect of pump, enter washing device mixing tank A44, thereby realize washing, purifying through washing device mixing tank A continuous phase fluid inlet 46.

At back extraction device, the phosphoric acid that back extraction device phase splitting device C heavy out 91 comes out returns back extraction device mixing tank A78 under the effect of pump; Loaded solvent from back extraction device phase splitting device B light phase export 84 come out, under the effect of pump through three grades of solvent inlets 94 of back extraction device, reverse-extraction agent (de-salted water) enters back extraction device mulser B86 through three grades of phosphoric acid imports 93 of back extraction device by back extraction device mulser B import 88; The mixed phase that forms comes out from back extraction device mulser B outlet 89, enter back extraction device phase splitting device C87 by back extraction device phase splitting device C mixed phase import 90, in back extraction device phase splitting device C87, realize the layering of mixed phase, light, the heavy two-phase that forms, loaded solvent is become no-load solvent by reverse-extraction agent (de-salted water) back extraction and comes out to return extraction plant from back extraction device phase splitting device C light phase export 92; Heavy phase is then returned back extraction device mixing tank A78 by back extraction device phase splitting device C heavy out 91, with back extraction device mixing tank A continuous phase fluid inlet 80 loaded solvents that enter, efficient mass transfer effect by back extraction device mixing tank A78, the mixed phase that forms comes out from back extraction device mixing tank A mixed phase fluid outlet 82, enter back extraction device phase splitting device B79 by back extraction device phase splitting device B mixed phase import 83, in back extraction device phase splitting device B79, realize the layering of mixed phase, what form is light, heavy two-phase, the loaded solvent that also contains part phosphoric acid enters back extraction device mulser B86 from back extraction device phase splitting device B light phase export 84, heavy phase is then returned back extraction device mulser A69 by back extraction device phase splitting device B heavy out 85, under the effect of pump from back extraction device phosphoric acid import 76, loaded solvent all enters back extraction device mulser A69 by back extraction device mulser import 71 from back extraction device solvent inlet 77, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mulser A69, the mixed phase that forms comes out from back extraction device mulser outlet 72, enters back extraction device phase splitting device 70 by back extraction device mixed phase import 73.In back extraction device phase splitting device 70, realize the layering of mixed phase, light, the heavy two-phase of formation.The phosphoric acid of loaded solvent enters heavy phase becomes purifying phosphoric acid from 74 discharges of back extraction device heavy out.Loaded solvent comes out from back extraction device light phase export 75, enters back extraction device mixing tank A78 through back extraction device mixing tank A continuous phase fluid inlet 80 under the effect of pump.

Embodiment 3

Referring to Fig. 3, adopt the phosphoric acid purification device of three grades of extractions, washing and back extractions, comprise extraction plant, washing device and back extraction device, wherein: extraction plant comprises extraction plant mixing tank B27 and extraction plant phase splitting device D28, and extraction plant mixing tank B mixed phase fluid outlet 31 is connected with extraction plant phase splitting device D mixed phase import 32; Phase splitting device B light phase export 16 is connected with mixing tank B continuous phase fluid inlet 29 by the pipeline that is provided with pump, phase splitting device D heavy out 34 is connected with mixing tank A dispersed phase fluid inlet 13 by the pipeline that is provided with pump, and phase splitting device D light phase export 33 is connected with washing device solvent inlet 43;

Washing device comprises washing device mixing tank B61 and washing device phase splitting device D62, washing device mixing tank B mixed phase fluid outlet 65 is connected with washing device phase splitting device D mixed phase import 66, washing device phase splitting device B light phase export 50 is connected with washing device mixing tank B continuous phase fluid inlet 63 by the pipeline that is provided with pump, washing device phase splitting device D heavy out 68 is connected with washing device mixing tank A dispersed phase fluid inlet 47 by the pipeline that is provided with pump, and washing device phase splitting device D light phase export 67 is connected with back extraction device solvent inlet 77;

Back extraction device comprises back extraction device mixing tank B95 and back extraction device phase splitting device D96, back extraction device mixing tank B mixed phase fluid outlet 99 is connected with back extraction device phase splitting device D mixed phase import 100, back extraction device phase splitting device B light phase export 84 is connected with back extraction device phase splitting device C heavy out 97 by the pipeline that is provided with pump, back extraction device phase splitting device D heavy out 102 is connected with back extraction device mixing tank A dispersed phase fluid inlet 81 by the pipeline that is provided with pump, back extraction device phase splitting device D light phase export 101 is connected with extraction plant solvent inlet 9, and all the other are with embodiment 1.

During use, at extraction plant, the phosphoric acid that comes out from extraction plant phase splitting device B light phase export 16, enter extraction plant mixing tank B27 through extraction plant mixing tank B continuous phase fluid inlet 29 under the effect of pump, feed phosphoric acid (fresh phosphoric) enters extraction plant mixing tank B27 through extraction plant mixing tank B dispersed phase fluid inlet 30; The mixed phase that forms comes out from extraction plant mixing tank B mixed phase fluid outlet 31, enter extraction plant phase splitting device D28 by extraction plant phase splitting device D mixed phase import 32, in extraction plant phase splitting device D28, realize the layering of mixed phase, light, the heavy two-phase that forms, most of phosphoric acid are extracted the agent extraction and enter and gently form loaded solvent mutually and come out to enter washing device from extraction plant phase splitting device D light phase export 33; Heavy phase is then come out by extraction plant phase splitting device D heavy out 34, returns extraction plant mixing tank A10 by extraction plant mixing tank A dispersed phase fluid inlet 13 under the effect of pump; Loaded solvent comes out from extraction plant phase splitting device A light phase export 7, under the effect of pump, enter extraction plant mixing tank A10 through extraction plant mixing tank A continuous phase fluid inlet 12, efficient mass transfer effect by extraction plant mixing tank A10, the mixed phase that forms comes out from extraction plant mixing tank A continuous phase fluid outlet 14, enter extraction plant phase splitting device B11 by extraction plant phase splitting device B mixed phase import 15, in extraction plant phase splitting device B11, realize the layering of mixed phase, what form is light, heavy two-phase, phosphoric acid is extracted agent extraction and enters and gently form loaded solvent mutually and enter extraction plant mixing tank B27 from extraction plant phase splitting device B light phase export 16, heavy phase then by extraction plant phase splitting device B heavy out 17 under the effect of pump from extraction plant phosphoric acid import 8, extraction agent all enters extraction plant mulser A1 by extraction plant mulser A import 3 from extraction plant solvent inlet 9, extraction agent and phosphoric acid are finished the efficient mass transfer process in extraction plant mulser A1, the mixed phase that forms comes out from extraction plant mulser A outlet 4, enters extraction plant phase splitting device A2 by extraction plant mixed phase import 5.In extraction plant phase splitting device A2, realize the layering of mixed phase, light, the heavy two-phase of formation.Impurity in the phosphoric acid enters heavy phase to be become raffinate and discharges from extraction plant heavy out 6, and phosphoric acid is extracted the agent extraction to be become loaded solvent and come out to enter extraction plant mixing tank A10 from extraction plant light phase export 7.

At washing device, from washing device phase splitting device B light phase export 50, enter washing device mixing tank B61 through washing device mixing tank B continuous phase fluid inlet 63 under the effect of pump, washing acid (purifying phosphoric acid) enters washing device mixing tank B61 through washing device mixing tank B dispersed phase fluid inlet 64; The mixed phase that forms comes out from washing device mixing tank B mixed phase fluid outlet 65, enter washing device phase splitting device D62 by washing device phase splitting device D mixed phase import 66, in washing device phase splitting device D62, realize the layering of mixed phase, light, the heavy two-phase that forms, by phosphoric acid washing loaded solvent come out to enter back extraction device from washing device phase splitting device D light phase export 67; Heavy phase is then come out by washing device phase splitting device D heavy out 68, returns washing device mixing tank A44 by washing device mixing tank A dispersed phase fluid inlet 47 under the effect of pump; Loaded solvent comes out from washing device phase splitting device A light phase export 41, under the effect of pump, enter washing device mixing tank A44 through washing device mixing tank A continuous phase fluid inlet 46, efficient mass transfer effect by washing device mixing tank A44, the mixed phase that forms comes out from washing device mixing tank A mixed phase fluid outlet 48, enter washing device phase splitting device B45 by washing device phase splitting device B mixed phase import 49, in washing device phase splitting device B45, realize the layering of mixed phase, what form is light, heavy two-phase, by phosphoric acid washing loaded solvent enter washing device mixing tank B61 from washing device phase splitting device B light phase export 50, heavy phase then by washing device phase splitting device B heavy out 51 under the effect of pump from phosphoric acid import 42, loaded solvent all enters washing device mulser A35 by washing device mulser A import 37 from washing device solvent inlet 43, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device mulser A35, the mixed phase that forms comes out from washing device mulser A outlet 38, enters washing device phase splitting device A36 by washing device mixed phase import 39.In washing device phase splitting device A36, 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 heavy out 40, by phosphoric acid washing loaded solvent come out to enter washing device mixing tank A44 from washing device light phase export 41.Mix by one-level emulsification and secondary, improved washing effect widely.

At back extraction device, the loaded solvent that comes out from back extraction device phase splitting device B light phase export 84, enter back extraction device mixing tank B95 through back extraction device mixing tank B continuous phase fluid inlet 97 under the effect of pump, reverse-extraction agent (de-salted water) enters back extraction device mixing tank B95 through back extraction device mixing tank B dispersed phase fluid inlet 98; The mixed phase that forms comes out from back extraction device mixing tank B mixed phase fluid outlet 99, enter back extraction device phase splitting device D96 by back extraction device phase splitting device D mixed phase import 100, in back extraction device phase splitting device D96, realize the layering of mixed phase, light, the heavy two-phase that forms, loaded solvent is become no-load solvent by reverse-extraction agent (de-salted water) back extraction and comes out to return extraction plant from back extraction device phase splitting device D light phase export 101; Heavy phase is then come out by back extraction device phase splitting device D heavy out 102, returns back extraction device mixing tank A78 by back extraction device mixing tank A dispersed phase fluid inlet 81 under the effect of pump; Loaded solvent comes out from the light phase export 75 of back extraction device phase splitting device A70, under the effect of pump, enter back extraction device mixing tank A78 through back extraction device mixing tank A continuous phase fluid inlet 80, efficient mass transfer effect by back extraction device mixing tank A78, the mixed phase that forms comes out from back extraction device mixing tank A mixed phase fluid outlet 82, enter back extraction device phase splitting device B79 by back extraction device phase splitting device B mixed phase import 83, in back extraction device phase splitting device B79, realize the layering of mixed phase, what form is light, heavy two-phase, the loaded solvent that also contains part phosphoric acid enters back extraction device mixing tank B95 from back extraction device phase splitting device B light phase export 84, heavy phase then by back extraction device phase splitting device B heavy out 85 under the effect of pump from back extraction device phosphoric acid import 76, loaded solvent all enters back extraction device mulser A69 by back extraction device mulser import 71 from back extraction device solvent inlet 77, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mulser A69, the mixed phase that forms comes out from back extraction device mulser A outlet 72, enters back extraction device phase splitting device A70 by mixed phase import 73.In back extraction device phase splitting device A70, realize the layering of mixed phase, light, the heavy two-phase of formation.The phosphoric acid of loaded solvent enters heavy phase becomes purifying phosphoric acid from 74 discharges of back extraction device heavy out, and loaded solvent comes out to enter back extraction device mixing tank A78 from light phase export 75.

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 CN1736577A, 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, a kind of phosphoric acid purification device, comprise extraction plant, washing device and back extraction device, it is characterized in that: extraction plant phase splitting device B light phase export (16) is connected with washing device solvent inlet (43), washing device phase splitting device B light phase export (50) is connected with back extraction device solvent inlet (77), and back extraction device phase splitting device B light phase export (84) is connected with extraction plant solvent inlet (9);

Extraction plant comprises extraction plant mulser A (1) and extraction plant phase splitting device A (2), extraction plant mixing tank A (10) and extraction plant phase splitting device B (11), extraction plant mulser A import (3) is connected with extraction plant phosphoric acid import (8) and extraction plant solvent inlet (9), and extraction plant mulser A outlet (4) is connected with extraction plant mixed phase import (5); Extraction plant mixing tank A mixed phase fluid outlet (14) is connected with extraction plant phase splitting device B mixed phase import (15), and extraction plant light phase export (7) is connected with extraction plant mixing tank A continuous phase fluid inlet (12) by pipeline; Extraction plant phase splitting device B heavy out (17) is connected with extraction plant phosphoric acid import (8) by pipeline;

Washing device comprises washing device mulser A (35) and washing device phase splitting device A (36), washing device mixing tank A (44) and washing device phase splitting device B (45), washing device mulser A import (37) is connected with washing device phosphoric acid import (42) and washing device solvent inlet (43), and washing device mulser A outlet (38) is connected with washing device mixed phase import (39); Washing device mixing tank A mixed phase fluid outlet (48) is connected with washing device phase splitting device B mixed phase import (49), washing device light phase export (41) is connected with washing device mixing tank A continuous phase fluid inlet (46) by pipeline, and washing device phase splitting device B heavy out (51) is connected with washing device phosphoric acid import (42) by pipeline;

Back extraction device comprises back extraction device mulser A (69) and back extraction device phase splitting device A (70), back extraction device mixing tank A (78) and back extraction device phase splitting device B (79), back extraction device mulser A import (71) is connected with back extraction device phosphoric acid import (76) and back extraction device solvent inlet (77), and back extraction device mulser A outlet (72) is connected with back extraction device mixed phase import (73); Back extraction device mixing tank A mixed phase fluid outlet (82) is connected with back extraction device phase splitting device B mixed phase import (83), and back extraction device light phase export (75) is connected with back extraction device mixing tank A continuous phase fluid inlet (80) by pipeline; Back extraction device phase-splitting groove B heavy out (85) is connected with back extraction device phosphoric acid import (76) by pipeline, and back extraction device phase splitting device B light phase export (84) is connected with extraction plant solvent inlet (9).

2, phosphoric acid purification device as claimed in claim 1, it is characterized in that: extraction plant comprises extraction plant mulser B (18) and extraction plant phase splitting device C (19), extraction plant mulser B import (20) is connected with three grades of phosphoric acid imports of extraction plant (25) and three grades of solvent inlets of extraction plant (26), and extraction plant mulser B outlet (21) is connected with extraction plant phase splitting device C mixed phase import (22); Extraction plant phase splitting device B light phase export (16) is connected by three grades of solvent inlets of pipeline and extraction plant (26), extraction plant phase splitting device C heavy out (23) is connected with extraction plant mixing tank A dispersed phase fluid inlet (13) by pipeline, and extraction plant phase splitting device C light phase export (24) is connected with washing device solvent inlet (43);

Washing device comprises washing device mulser B (52) and washing device phase splitting device C (53), washing device mulser B import (54) is connected with three grades of phosphoric acid imports of washing device (59) and three grades of solvent inlets of washing device (60), and washing device mulser B outlet (55) is connected with washing device phase splitting device C mixed phase import (56); Washing device phase splitting device B light phase export (50) is connected by three grades of solvent inlets of pipeline and washing device (60), washing device phase splitting device C heavy out (57) is connected with washing device mixing tank A dispersed phase fluid inlet (47) by pipeline, and washing device phase splitting device C light phase export (58) is connected with back extraction device solvent inlet (77);

Back extraction device comprises back extraction device mulser B (86) and back extraction device phase splitting device C (87), back extraction device mulser B import (88) is connected with three grades of phosphoric acid imports of back extraction device (93) and three grades of solvent inlets of back extraction device (94), and back extraction device mulser B outlet (89) is connected with back extraction device phase splitting device C mixed phase import (90); Back extraction device phase splitting device B light phase export (84) is connected by three grades of solvent inlets of pipeline and back extraction device (94), back extraction device phase splitting device C heavy out (91) is connected with back extraction device mixing tank A dispersed phase fluid inlet (81) by pipeline, and back extraction device phase splitting device C light phase export (92) is connected with extraction plant solvent inlet (9).

3, phosphoric acid purification device as claimed in claim 1, it is characterized in that: extraction plant comprises extraction plant mixing tank B (27) and extraction plant phase splitting device D (28), and extraction plant mixing tank B mixed phase fluid outlet (31) is connected with extraction plant phase splitting device D mixed phase import (32); Phase splitting device B light phase export (16) is connected with mixing tank B continuous phase fluid inlet (29) by pipeline, phase splitting device D heavy out (34) is connected with mixing tank A dispersed phase fluid inlet (13) by pipeline, and phase splitting device D light phase export (33) is connected with washing device solvent inlet (43);

Washing device comprises washing device mixing tank B (61) and washing device phase splitting device D (62), washing device mixing tank B mixed phase fluid outlet (65) is connected with washing device phase splitting device D mixed phase import (66), washing device phase splitting device B light phase export (50) is connected with washing device mixing tank B continuous phase fluid inlet (63) by pipeline, washing device phase splitting device D heavy out (68) is connected with washing device mixing tank A dispersed phase fluid inlet (47) by pipeline, and washing device phase splitting device D light phase export (67) is connected with back extraction device solvent inlet (77);

Back extraction device comprises back extraction device mixing tank B (95) and back extraction device phase splitting device D (96), back extraction device mixing tank B mixed phase fluid outlet (99) is connected with back extraction device phase splitting device D mixed phase import (100), back extraction device phase splitting device B light phase export (84) is connected with back extraction device phase splitting device C heavy out (97) by pipeline, back extraction device phase splitting device D heavy out (102) is connected with back extraction device mixing tank A dispersed phase fluid inlet (81) by pipeline, and back extraction device phase splitting device D light phase export (101) is connected with extraction plant 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.