CN201433105Y

CN201433105Y - Phosphoric acid purifying device

Info

Publication number: CN201433105Y
Application number: CN2009201255483U
Authority: CN
Inventors: 王邵东; 骆广生; 闵胜益; 王平
Original assignee: Wengfu Group Co Ltd
Current assignee: Wengfu Group Co Ltd
Priority date: 2009-07-17
Filing date: 2009-07-17
Publication date: 2010-03-31
Anticipated expiration: 2019-07-17

Abstract

The utility model discloses a phosphoric acid purifying device, which comprises an extraction device, a washing device and a backextraction device, wherein, the extraction device uses a mixer and a phase splitting device and a combination of an emulsifying machine and the phase splitting device, or the combination is provided with a multi-level formed by the mixer or a plurality of mixers and thephase splitting device (or the emulsifying machine and the phase splitting device); the washing device and the backextraction device use a two-level formed by two emulsifying machines and the phase splitting devices or a multi-level formed by the plurality of emulsifying machines and the phase splitting devices. The continuous phase fluid inlet of the extraction device is connected with the lightphase outlet of the backextraction device final-stage phase splitting device, the first-level solvent inlet of the washing device is connected with the light phase outlet of the extraction device final-stage phase splitting device, a first-level solvent inlet of the backextraction device is connected with the light phase outlet of the washing device final-stage phase splitting device. For the phosphoric acid purifying device, the mass transfer performance is enhanced, the purifying efficiency is increased, the equipment investment and the running 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.

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.

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 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.

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 phase splitting device B 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 secondary light phase export is connected with extraction plant continuous phase fluid inlet;

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

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 mulser import of washing device one-level and 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 detergent inlet and washing device one-level solvent inlet, 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 mulser import of washing device secondary and 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, the import of washing device secondary mulser is connected with washing device secondary detergent inlet and the import of washing device secondary solvent, 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 by pipeline, and washing device secondary heavy out is connected with washing device one-level detergent inlet by pipeline;

Back extraction device comprises back extraction device one-level mulser and back extraction device one-level phase splitting device, back extraction device secondary mulser and back extraction device secondary phase splitting device, back extraction device one-level mulser is provided with mulser import of back extraction device one-level and the outlet of back extraction device one-level mulser, back extraction device one-level phase splitting device is provided with the import of back extraction device one-level mixed phase, back extraction device one-level heavy out and back extraction device one-level light phase export, the import of back extraction device one-level mulser is connected with reverse-extraction agent import of back extraction device one-level and back extraction device one-level solvent inlet, and the outlet of back extraction device one-level mulser is connected with the import of back extraction device one-level mixed phase.Back extraction device secondary mulser is provided with mulser import of back extraction device secondary and the outlet of back extraction device secondary mulser, back extraction device secondary phase splitting device is provided with the import of back extraction device secondary mixed phase, back extraction device secondary heavy out and back extraction device secondary light phase export, the import of back extraction device secondary mulser is connected with reverse-extraction agent import of back extraction device secondary and the import of back extraction device secondary solvent, and the outlet of back extraction device secondary mulser is connected with the import of back extraction device secondary mixed phase; Back extraction device one-level light phase export is connected with the import of back extraction device secondary solvent by pipeline, and back extraction device secondary heavy out is connected with the import of back extraction device one-level reverse-extraction agent by pipeline.

Above-mentioned phosphoric acid purification device, wherein: comprise extraction plant mixing tank B and extraction plant phase splitting device C, extraction plant mixing tank B is provided with extraction plant mixing tank B continuous phase fluid inlet, extraction plant mixing tank B dispersed phase fluid inlet and the outlet of extraction plant mixing tank B mixed phase fluid, extraction plant phase splitting device C is provided with the import of extraction plant phase splitting device C mixed phase, extraction plant phase splitting device C heavy out and extraction plant phase splitting device C light phase export, and the outlet of extraction plant mixing tank B mixed phase fluid 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 with extraction plant mixing tank B continuous phase fluid inlet, extraction plant phase splitting device C heavy out is connected with the import of extraction plant phosphoric acid, and extraction plant phase splitting device C light phase export is connected with washing device mixing tank continuous phase fluid inlet;

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 detergent inlet of three grades of mulser imports of washing device and washing device and three grades of solvent inlets of washing device are connected, and three grades of mulser outlets of washing device are connected with three grades of mixed phase imports of washing device; Three grades of solvent inlets of washing device secondary light phase export and washing device are connected, and three grades of heavy outs of washing device are connected with washing device secondary detergent inlet, and three grades of light phase exports of washing device are connected with back extraction device one-level solvent inlet;

Back extraction device comprises three grades of mulsers of back extraction device and three grades of phase-splitting equipment of back extraction device, three grades of mulsers of back extraction device are provided with three grades of mulser imports of back extraction device and three grades of mulser outlets of back extraction device, three grades of phase-splitting equipment of back extraction device are provided with three grades of mixed phase imports of back extraction device, three grades of heavy outs of back extraction device and three grades of light phase exports of back extraction device, three grades of reverse-extraction agent imports of three grades of mulser imports of back extraction device and back extraction device and three grades of solvent inlets of back extraction device are connected, and three grades of mulser outlets of back extraction device are connected with three grades of mixed phase imports of back extraction device; Three grades of solvent inlets of back extraction device secondary light phase export and back extraction device are connected, and three grades of heavy outs of back extraction device are connected with the import of back extraction device secondary reverse-extraction agent, and three grades of light phase exports of back extraction device are connected with extraction plant continuous phase fluid inlet.

Above-mentioned phosphoric acid purification device, wherein: comprise extraction plant mulser B and extraction plant phase splitting device D, extraction plant mulser B is provided with B import of extraction plant mulser and extraction plant mulser B outlet, extraction plant phase splitting device D is provided with the import of extraction plant phase splitting device D mixed phase, extraction plant phase splitting device D heavy out and extraction plant phase splitting device D light phase export, 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 D mixed phase; Three grades of solvent inlets of extraction plant phase splitting device B light phase export and extraction plant are connected, extraction plant phase splitting device D heavy out is connected with the import of extraction plant phosphoric acid, and extraction plant phase splitting device D light phase export is connected with washing device mixing tank continuous phase fluid inlet;

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 detergent inlet of three grades of mulser imports of washing device and washing device and three grades of solvent inlets of washing device are connected, and three grades of mulser outlets of washing device are connected with three grades of mixed phase imports of washing device; Three grades of solvent inlets of washing device secondary light phase export and washing device are connected, and three grades of heavy outs of washing device are connected with washing device secondary detergent inlet, and three grades of light phase exports of washing device are connected with back extraction device one-level solvent inlet.

The utility model compared with prior art, as can be known from the above technical solutions, require difference according to purifying, wherein: extraction plant is selected the combination of one group of mixing tank and phase splitting device and one group of mulser and phase splitting device for use, or increases multistage that one or more groups mixing tank and phase splitting device (or mulser and phase splitting device) constitute on aforesaid combination; Washing device, back extraction device select for use secondary that two-stage group mulser and phase splitting device constitute or by many groups mulser and phase splitting device combine multistage.In the phosphoric acid purification process, feed phosphoric acid (fresh phosphoric) adds by mixing tank, mulser dispersed phase fluid inlet, the phosphoric acid import of final stage extraction plant, washing acid (purifying phosphoric acid) is added by washing device final stage mixer disperses phase fluid inlet, and washing acid (purifying phosphoric acid), de-salted water add by final stage washing device detergent inlet, the import of back extraction device reverse-extraction agent.The no-load solvent of extraction plant continuous phase fluid inlet is from the light phase export of back extraction device final stage phase splitting device, the loaded solvent of washing device one-level solvent inlet is from the light phase export of extraction plant final stage phase splitting device, and the loaded solvent of back extraction device one-level solvent inlet is from the light phase export of washing device final stage phase splitting device.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 mixing tank A, 2, extraction plant phase splitting device A, 3, extraction plant mixing tank A continuous phase fluid inlet, 4, extraction plant mixing tank A dispersed phase fluid inlet, 5, the outlet of extraction plant mixing tank A mixed phase fluid, 6, the import of extraction plant phase splitting device A mixed phase, 7, extraction plant phase splitting device A light phase export, 8, extraction plant phase splitting device A heavy out, 9, extraction plant mulser A, 10, extraction plant phase splitting device B, 11, extraction plant mulser A import, 12, extraction plant mulser A outlet, 13, the import of extraction plant phase splitting device B mixed phase, 14, extraction plant phase splitting device B heavy out, 15, extraction plant phase splitting device B light phase export, 16, the import of extraction plant phosphoric acid, 17, the extraction plant solvent inlet, 18, extraction plant mixing tank B, 19, extraction plant phase splitting device C, 20, extraction plant mixing tank B continuous phase fluid inlet, 21, extraction plant mixing tank B dispersed phase fluid inlet, 22, the outlet of extraction plant mixing tank B mixed phase fluid, 23, the import of extraction plant phase splitting device C mixed phase, 24, extraction plant phase splitting device C light phase export, 25, extraction plant phase splitting device C heavy out, 26, extraction plant mulser B, 27, extraction plant phase splitting device D, 28, extraction plant mulser B import, 29, extraction plant mulser B outlet, 30, the import of extraction plant phase splitting device D mixed phase, 31, extraction plant phase splitting device D heavy out, 32, extraction plant phase splitting device D light phase export, 33, three grades of phosphoric acid imports of extraction plant, 34, three grades of solvent inlets of extraction plant, 35, washing device one-level mulser, 36, washing device one-level phase splitting device, 37, the import of washing device one-level mulser, 38, the outlet of washing device one-level mulser, 39, the import of washing device one-level mixed phase, 40, washing device one-level heavy out, 41, washing device one-level light phase export, 42, washing device one-level detergent inlet, 43, washing device one-level solvent inlet, 44, washing device secondary mulser, 45, washing device secondary phase splitting device, 46, the import of washing device secondary mulser, 47, the outlet of washing device secondary mulser, 48, the import of washing device secondary mixed phase, 49, washing device secondary heavy out, 50, washing device secondary light phase export, 51, washing device secondary detergent inlet, 52, the import of washing device secondary solvent, 53, three grades of mulsers of washing device, 54, three grades of phase-splitting equipment of washing device, 55, three grades of mulser imports of washing device, 56, three grades of mulser outlets of washing device, 57, three grades of mixed phase imports of washing device, 58, three grades of heavy outs of washing device, 59, three grades of light phase exports of washing device, 60, three grades of detergent inlet of washing device, 61, three grades of solvent inlets of washing device, 62, back extraction device one-level mulser, 63, back extraction device one-level phase splitting device, 64, the import of back extraction device one-level mulser, 65, the outlet of back extraction device one-level mulser, 66, the import of back extraction device one-level mixed phase, 67, back extraction device one-level heavy out, 68, back extraction device one-level light phase export, 69, the import of back extraction device one-level reverse-extraction agent, 70, back extraction device one-level solvent inlet, 71, back extraction device secondary mulser, 72, back extraction device secondary phase splitting device, 73, the import of back extraction device secondary mulser, 74, the outlet of back extraction device secondary mulser, 75, the import of back extraction device secondary mixed phase, 76, back extraction device secondary heavy out, 77, back extraction device secondary light phase export, 78, the import of back extraction device secondary reverse-extraction agent, 79, the import of back extraction device secondary solvent, 80, three grades of mulsers of back extraction device, 81, three grades of phase-splitting equipment of back extraction device, 82, three grades of mulser imports of back extraction device, 83, three grades of mulser outlets of back extraction device, 84, three grades of mixed phase imports of back extraction device, 85, three grades of heavy outs of back extraction device, 86, three grades of light phase exports of back extraction device, 87, three grades of reverse-extraction agent imports of back extraction device, 88, three grades of solvent inlets of back extraction device.

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 phase splitting device B light phase export 15 is connected with washing device one-level solvent inlet 43, washing device secondary light phase export 50 is connected with back extraction device one-level solvent inlet 70, and back extraction device secondary light phase export 77 is connected with extraction plant continuous phase fluid inlet 3;

Extraction plant comprises extraction plant mixing tank A1 and extraction plant phase splitting device A2, extraction plant mulser A9 and extraction plant phase splitting device B10, extraction plant mixing tank A1 is provided with extraction plant mixing tank A continuous phase fluid inlet 3, extraction plant mixing tank A dispersed phase fluid inlet 4 and extraction plant mixing tank A mixed phase fluid outlet 5, extraction plant phase splitting device A2 is provided with extraction plant phase splitting device A mixed phase import 6, extraction plant phase splitting device A heavy out 8 and extraction plant phase splitting device A light phase export 7, extraction plant mixing tank A mixed phase fluid outlet 5 are connected with extraction plant phase splitting device A mixed phase import 6; Extraction plant mulser A9 is provided with extraction plant mulser A import 11 and extraction plant mulser A outlet 12, extraction plant phase splitting device B10 is provided with extraction plant phase splitting device B mixed phase import 13, extraction plant phase splitting device B heavy out 14 and extraction plant phase splitting device B light phase export 15, extraction plant mulser A import 11 is connected with extraction plant phosphoric acid import 16 and extraction plant solvent inlet 17, and extraction plant mulser A outlet 12 is connected with extraction plant phase splitting device B mixed phase import 13; Extraction plant phase splitting device A light phase export 7 is connected with extraction plant solvent inlet 17, and extraction plant phase splitting device B heavy out 14 is connected with extraction plant mixing tank A dispersed phase fluid inlet 4 by pipeline;

Washing device comprises washing device one-level mulser 35 and washing device one-level phase splitting device 36, washing device secondary mulser 44 and washing device secondary phase splitting device 45, washing device one-level mulser 35 is provided with washing device one-level mulser import 37 and washing device one-level mulser outlet 38, washing device one-level phase splitting device 36 is provided with washing device one-level mixed phase import 39, washing device one-level heavy out 40 and washing device one-level light phase export 41, washing device one-level mulser import 37 is connected with washing device one-level detergent inlet 42 and washing device one-level solvent inlet 46, and washing device one-level mulser outlet 38 is connected with washing device one-level mixed phase import 39; Washing device secondary mulser 44 is provided with washing device secondary mulser import 46 and washing device secondary mulser outlet 47, washing device secondary phase splitting device 45 is provided with washing device secondary mixed phase import 48, washing device secondary heavy out 49 and washing device secondary light phase export 50, washing device secondary mulser import 46 is connected with washing device secondary detergent inlet 51 and washing device secondary solvent import 52, and washing device secondary mulser outlet 47 is connected with washing device secondary mixed phase import 48; Washing device one-level light phase export 41 is connected with washing device secondary solvent import 52 by pipeline, and washing device secondary heavy out 49 is connected with washing device one-level detergent inlet 42 by pipeline;

Back extraction device comprises back extraction device one-level mulser 62 and back extraction device one-level phase splitting device 63, back extraction device secondary mulser 71 and back extraction device secondary phase splitting device 72, back extraction device one-level mulser 62 is provided with back extraction device one-level mulser import 64 and back extraction device one-level mulser outlet 65, back extraction device one-level phase splitting device 63 is provided with back extraction device one-level mixed phase import 66, back extraction device one-level heavy out 67 and back extraction device one-level light phase export 68, back extraction device one-level mulser import 64 is connected with back extraction device one-level reverse-extraction agent import 69 and back extraction device one-level solvent inlet 70, and back extraction device one-level mulser outlet 65 is connected with back extraction device one-level mixed phase import 66; Back extraction device secondary mulser 71 is provided with back extraction device secondary mulser import 73 and back extraction device secondary mulser outlet 74, back extraction device secondary phase splitting device 72 is provided with back extraction device secondary mixed phase import 75, back extraction device secondary heavy out 76 and back extraction device secondary light phase export 77, back extraction device secondary mulser import 73 is connected with back extraction device secondary reverse-extraction agent import 78 and back extraction device secondary solvent import 79, and back extraction device secondary mulser outlet 74 is connected with back extraction device secondary mixed phase import 75; Back extraction device one-level light phase export 68 is connected with back extraction device secondary solvent import 79 by pipeline, and back extraction device secondary heavy out 76 is connected with back extraction device one-level reverse-extraction agent import 69 by pipeline.

During use: at extraction plant, the phosphoric acid that comes out from extraction plant phase splitting device B heavy out 14 enters the mouth 4 from extraction plant mixing tank A dispersed phase fluid under the effect of pump, extraction agent (from the no-load solvent of back extraction device secondary light phase export 77) enters extraction plant mixing tank A1 from extraction plant mixing tank A continuous phase fluid inlet 3, extraction agent and phosphoric acid are finished the efficient mass transfer process in extraction plant mixing tank A1, the mixed phase that forms comes out from extraction plant mixing tank A mixed phase fluid outlet 5, enters extraction plant phase splitting device A2 by extraction plant phase splitting device A mixed phase import 6.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 8 discharges of extraction plant phase splitting device A heavy out, phosphoric acid is extracted agent extraction to be become loaded solvent and comes out from extraction plant phase splitting device B light phase export 7, enters extraction plant mulser A9 through extraction plant solvent inlet 17 under the effect of pump; Feed phosphoric acid (fresh phosphoric) enters extraction plant mulser A9 through extraction plant phosphoric acid import 16, efficient mass transfer effect by extraction plant mulser A9, further improve the phosphoric acid extraction rate, the mixed phase that forms comes out from extraction plant mulser A outlet 12, enter extraction plant phase splitting device B10 by extraction plant phase splitting device B mixed phase import 13, in extraction plant phase splitting device B10, 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 one-level solvent inlet 43 from extraction plant phase splitting device B light phase export 15, heavy phase is then returned extraction plant mixing tank A1 by extraction plant phase splitting device B heavy out 14, thereby realizes extracting and separating.

At washing device, the phosphoric acid that washing device secondary heavy out 49 comes out, under the effect of pump, enter washing device one-level mulser 35 from washing device one-level solvent inlet 43 by washing device one-level mulser import 37 from washing device one-level detergent inlet 42, the loaded solvent that comes from extraction plant, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device one-level mulser 35, the mixed phase that forms comes out from washing device one-level mulser outlet 38, enters washing device one-level phase splitting device 36 by washing device one-level mixed phase import 39.In washing device one-level 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 one-level heavy out 40, loaded solvent comes out from washing device one-level light phase export 41, enters washing device secondary mulser 44 through washing device secondary solvent import 52 under the effect of pump.Washing acid (purifying phosphoric acid) enters washing device secondary mulser 44 through washing device secondary detergent inlet 51, efficient mass transfer effect by washing device secondary mulser 44, further improve the molten washing effect of load, the mixed phase that forms comes out from washing device secondary mulser outlet 47, enter washing device secondary phase splitting device 45 by washing device secondary mixed phase import 48, in washing device secondary phase splitting device 45, realize the layering of mixed phase, what form is light, heavy two-phase, be washed the loaded solvent that has purified and enter back extraction device from washing device secondary light phase export 50, heavy phase returns washing device one-level mulser 35 by washing device secondary heavy out 49.Thereby realization washing, purifying.

At back extraction device, the phosphoric acid that back extraction device secondary heavy out 76 comes out, under the effect of pump, enter back extraction device one-level mulser 62 from back extraction device one-level solvent inlet 70 by back extraction device one-level mulser import 64 from back extraction device one-level reverse-extraction agent import 69, the loaded solvent that comes from washing device, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device one-level mulser 62, the mixed phase that forms comes out from back extraction device one-level mulser outlet 65, enters back extraction device one-level phase splitting device 63 by back extraction device one-level mixed phase import 66.In back extraction device one-level phase splitting device 63, 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 67 discharges of back extraction device one-level heavy out, the loaded solvent of being taken off part phosphoric acid comes out from back extraction device one-level light phase export 68, enters back extraction device secondary mulser 71 through back extraction device secondary solvent import 79 under the effect of pump.De-salted water enters back extraction device secondary mulser 71 through back extraction device secondary reverse-extraction agent import 78, efficient mass transfer effect by back extraction device secondary mulser 71, further improve the molten back extraction effect of load, the mixed phase that forms comes out from back extraction device secondary mulser outlet 74, enter back extraction device secondary phase splitting device 72 by back extraction device secondary mixed phase import 75, in back extraction device secondary phase splitting device 72, realize the layering of mixed phase, what form is light, heavy two-phase, loaded solvent removes and then becomes no-load solvent behind the phosphoric acid and return extraction plant from back extraction device secondary light phase export 77, and the phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device one-level mulser 62 by back extraction device secondary heavy out 76.Realize the recycle of extraction agent.

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 extraction plant mixing tank B18 and extraction plant phase splitting device C19, extraction plant mixing tank B18 is provided with extraction plant mixing tank B continuous phase fluid inlet 20, extraction plant mixing tank B dispersed phase fluid inlet 21 and extraction plant mixing tank B mixed phase fluid outlet 22, extraction plant phase splitting device C19 is provided with extraction plant phase splitting device C mixed phase import 23, extraction plant phase splitting device C heavy out 25 and extraction plant phase splitting device C light phase export 24, extraction plant mixing tank B mixed phase fluid outlet 22 are connected with extraction plant phase splitting device C mixed phase import 23; Extraction plant phase splitting device B light phase export 15 is connected with extraction plant mixing tank B continuous phase fluid inlet 20, extraction plant phase splitting device C heavy out 25 is connected with extraction plant phosphoric acid import 16, and extraction plant phase splitting device C light phase export 24 is connected with washing device one-level solvent inlet 43;

Washing device comprises three grades of mulsers 53 of washing device and three grades of phase-splitting equipment 54 of washing device, three grades of mulsers 53 of washing device are provided with three grades of mulser imports 55 of washing device and three grades of mulser outlets 56 of washing device, three grades of phase-splitting equipment 54 of washing device are provided with three grades of mixed phase imports 57 of washing device, three grades of heavy outs 58 of washing device and three grades of light phase exports 59 of washing device, three grades of detergent inlet 60 of three grades of mulser imports 55 of washing device and washing device and three grades of solvent inlets 61 of washing device are connected, and three grades of mulsers of washing device outlet 56 is connected with three grades of mixed phase imports 57 of washing device; Three grades of solvent inlets 61 of washing device secondary light phase export 50 and washing device are connected, three grades of heavy outs 58 of washing device are connected with washing device secondary detergent inlet 51, and three grades of phase-splittings of washing device are established light phase export 59 and are connected with back extraction device one-level solvent inlet 70;

Back extraction device comprises three grades of mulsers 80 of back extraction device and three grades of phase-splitting equipment 81 of back extraction device, three grades of mulsers 80 of back extraction device are provided with three grades of mulser imports 82 of back extraction device and three grades of mulser outlets 83 of back extraction device, three grades of phase-splitting equipment 81 of back extraction device are provided with three grades of mixed phase imports 84 of back extraction device, three grades of heavy outs 85 of back extraction device and three grades of light phase exports 86 of back extraction device, three grades of reverse-extraction agent imports 87 of three grades of mulser imports 82 of back extraction device and back extraction device and three grades of solvent inlets 88 of back extraction device are connected, and three grades of mulsers of back extraction device outlet 83 is connected with three grades of mixed phase imports 84 of back extraction device; Three grades of solvent inlets 88 of back extraction device secondary light phase export 77 and back extraction device are connected, three grades of heavy outs 85 of back extraction device are connected with back extraction device secondary reverse-extraction agent import 78, and three grades of phase-splittings of back extraction device are established light phase export 86 and are connected with extraction plant continuous phase fluid inlet 3.

During use, at extraction plant, loaded solvent comes out, enters the mouth 20 through extraction plant mixing tank B continuous phase fluid under the effect of pump from extraction plant phase splitting device B light phase export 15, and feed phosphoric acid (fresh phosphoric) enters extraction plant mixing tank B18 through extraction plant mixing tank B dispersed phase fluid inlet 21; The mixed phase that forms comes out from extraction plant mixing tank B mixed phase fluid outlet 22, enter extraction plant phase splitting device C19 by extraction plant phase splitting device C mixed phase import 23, 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 mulser A9 by extraction plant phase splitting device C heavy out 25, the loaded solvent that enters with extraction plant solvent inlet 17 is by the efficient mass transfer effect of extraction plant mulser A9, the mixed phase that forms comes out from extraction plant mulser A outlet 12, enter extraction plant phase splitting device B10 by extraction plant phase splitting device B mixed phase import 13, in extraction plant phase splitting device B10, realize the layering of mixed phase, what form is light, heavy two-phase, most of phosphoric acid are extracted the agent extraction and enter and gently form loaded solvent mutually and enter extraction plant mixing tank B18 from extraction plant phase splitting device B light phase export 15.Heavy phase is then returned extraction plant mixing tank A dispersed phase fluid inlet 4 by extraction plant phase splitting device B heavy out 14, extraction agent (from the no-load solvent of three grades of light phase exports 86 of back extraction device) enters extraction plant mixing tank A1 from extraction plant mixing tank A continuous phase fluid inlet 3, extraction agent and phosphoric acid are finished the efficient mass transfer process in extraction plant mixing tank A1, the mixed phase that forms comes out from extraction plant mixing tank A mixed phase fluid outlet 5, enters extraction plant phase splitting device A2 by extraction plant phase splitting device A mixed phase import 6.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 8 discharges of extraction plant phase splitting device A heavy out.Phosphoric acid is extracted agent extraction to be become loaded solvent and comes out from extraction plant phase splitting device B light phase export 7, enters extraction plant mulser A9 through extraction plant solvent inlet 17 under the effect of pump.

At washing device, the phosphoric acid that three grades of heavy outs 58 of washing device come out returns washing device secondary mulser 44 under the effect of pump; The loaded solvent that comes out from washing device secondary phase splitting device 45 light phase exports, under the effect of pump, enter three grades of mulsers 53 of washing device through three grades of detergent inlet 60 of washing device through three grades of solvent inlets 61 of washing device, washing acid (purifying phosphoric acid), efficient mass transfer effect by multistage mulser has improved the phosphoric acid washing effect as much as possible; The mixed phase that forms comes out from three grades of mulser outlets 56 of washing device, enter three grades of phase-splitting equipment 54 of washing device by three grades of mixed phase imports 57 of washing device, in three grades of phase-splitting equipment 54 of washing device, realize the layering of mixed phase, light, the heavy two-phase that forms, be washed the loaded solvent that has purified and come out to enter back extraction device from three grades of light phase exports of washing device 59, heavy phase is returned washing device secondary mulser 44 by washing device heavy out 58.By three grades of washings, the impurity in the loaded solvent is washed acid elution to be become and washes spent acid and enter heavy phase and finally discharge from washing device one-level heavy out 40.

At back extraction device, the phosphoric acid that three grades of heavy outs 85 of back extraction device come out returns back extraction device secondary mulser 71 under the effect of pump; The loaded solvent that contains part phosphoric acid comes out from back extraction device secondary phase splitting device 72 light phase exports, under the effect of pump, enter three grades of mulsers 80 of back extraction device through three grades of reverse-extraction agent imports 87 of back extraction device through three grades of solvent inlets 88 of back extraction device, de-salted water, by the efficient mass transfer effect of multistage mulser, improved phosphoric acid back extraction effect as much as possible; The mixed phase that forms comes out from three grades of mulser outlets 83 of back extraction device, enter three grades of phase-splitting equipment 81 of back extraction device by three grades of mixed phase imports 84 of back extraction device, in three grades of phase-splitting equipment 81 of back extraction device, realize the layering of mixed phase, light, the heavy two-phase that forms, loaded solvent removes and then becomes no-load solvent behind the phosphoric acid and come out to return extraction plant from three grades of light phase exports of back extraction device 86, and the phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device secondary mulser 71 by back extraction device heavy out 85.By three grades of back extractions, the phosphoric acid in the loaded solvent is desalted the water back extraction and enters heavy phase finally from 67 discharges of back extraction device one-level heavy out, becomes purifying phosphoric acid.All the other are with embodiment 1.

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 extraction plant mulser B26 and extraction plant phase splitting device D27, extraction plant mulser B26 is provided with extraction plant mulser B import 28 and extraction plant mulser B outlet 29, extraction plant phase splitting device D27 is provided with extraction plant phase splitting device D mixed phase import 30, extraction plant phase splitting device D heavy out 31 and extraction plant phase splitting device D light phase export 32, three grades of phosphoric acid imports 33 of extraction plant mulser B import 28 and extraction plant and three grades of solvent inlets 34 of extraction plant are connected, and extraction plant mulser B outlet 29 is connected with extraction plant phase splitting device D mixed phase import 30; Three grades of solvent inlets 34 of extraction plant phase splitting device B light phase export 15 and extraction plant are connected, extraction plant phase splitting device D heavy out 31 is connected with extraction plant phosphoric acid import 16, and extraction plant phase splitting device D light phase export 32 is connected with washing device one-level solvent inlet 43;

During use, at extraction plant, the loaded solvent that comes out from extraction plant phase splitting device B light phase export 15, enter extraction plant mulser B26 through three grades of solvent inlets 34 of extraction plant under the effect of pump, feed phosphoric acid (fresh phosphoric) enters extraction plant mulser B26 through three grades of phosphoric acid imports 33 of extraction plant; The mixed phase that forms comes out from extraction plant mulser B outlet 29, enter extraction plant phase splitting device D27 by extraction plant phase splitting device D mixed phase import 30, in extraction plant phase splitting device D27, 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 32; Heavy phase is then come out by extraction plant phase splitting device D heavy out 31, returns extraction plant mulser A9 by extraction plant phosphoric acid import 16 under the effect of pump; Loaded solvent comes out, enters extraction plant mulser A9 through extraction plant solvent inlet 17 under the effect of pump from extraction plant phase splitting device A light phase export 7, efficient mass transfer effect by extraction plant mulser A9, the mixed phase that forms comes out from extraction plant mulser A outlet 12, enter extraction plant phase splitting device B10 by extraction plant phase splitting device B mixed phase import 13, in extraction plant phase splitting device B10, realize the layering of mixed phase, light, the heavy two-phase of formation.Loaded solvent enters extraction plant mulser B26 from extraction plant phase splitting device B light phase export 15, heavy phase then enters the mouth 4 from extraction plant mixing tank A dispersed phase fluid by extraction plant phase splitting device B heavy out 14 under the effect of pump, extraction agent (from the no-load solvent of three grades of light phase exports 86 of back extraction device) all enters extraction plant mixing tank A1 from extraction plant mixing tank A continuous phase fluid inlet 3, extraction agent and phosphoric acid are finished the efficient mass transfer process in extraction plant mixing tank A1, the mixed phase that forms comes out from extraction plant mixing tank A mixed phase fluid outlet 5, enters extraction plant phase splitting device A2 by extraction plant phase splitting device A mixed phase import 6.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 phase splitting device A heavy out 8, and phosphoric acid is extracted the agent extraction to be become loaded solvent and come out to enter extraction plant mulser A9 from extraction plant phase splitting device B light phase export 7.

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, 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 (15) is connected with washing device one-level solvent inlet (43), washing device secondary light phase export (50) is connected with back extraction device one-level solvent inlet (70), and back extraction device secondary light phase export (77) is connected with extraction plant continuous phase fluid inlet (3);

Extraction plant comprises extraction plant mixing tank A (1) and extraction plant phase splitting device A (2), extraction plant mulser A (9) and extraction plant phase splitting device B (10), extraction plant mixing tank A (1) is provided with extraction plant mixing tank A continuous phase fluid inlet (3), extraction plant mixing tank A dispersed phase fluid inlet (4) and extraction plant mixing tank A mixed phase fluid outlet (5), extraction plant phase splitting device A (2) is provided with extraction plant phase splitting device A mixed phase import (6), extraction plant phase splitting device A heavy out (8) and extraction plant phase splitting device A light phase export (7), extraction plant mixing tank A mixed phase fluid outlet (5) is connected with extraction plant phase splitting device A mixed phase import (6); Extraction plant mulser A (9) is provided with extraction plant mulser A import (11) and extraction plant mulser A outlet (12), extraction plant phase splitting device B (10) is provided with extraction plant phase splitting device B mixed phase import (13), extraction plant phase splitting device B heavy out (14) and extraction plant phase splitting device B light phase export (15), extraction plant mulser A import (11) is connected with extraction plant phosphoric acid import (16) and extraction plant solvent inlet (17), and extraction plant mulser A outlet (12) is connected with extraction plant phase splitting device B mixed phase import (13); Extraction plant phase splitting device A light phase export (7) is connected with extraction plant solvent inlet (17), and extraction plant phase splitting device B heavy out (14) is connected with extraction plant mixing tank A dispersed phase fluid inlet (4) by pipeline;

Washing device comprises washing device one-level mulser (35) and washing device one-level phase splitting device (36), washing device secondary mulser (44) and washing device secondary phase splitting device (45), washing device one-level mulser (35) is provided with washing device one-level mulser import (37) and washing device one-level mulser outlet (38), washing device one-level phase splitting device (36) is provided with washing device one-level mixed phase import (39), washing device one-level heavy out (40) and washing device one-level light phase export (41), washing device one-level mulser import (37) is connected with washing device one-level detergent inlet (42) and washing device one-level solvent inlet (46), and washing device one-level mulser outlet (38) is connected with washing device one-level mixed phase import (39); Washing device secondary mulser (44) is provided with washing device secondary mulser import (46) and washing device secondary mulser outlet (47), washing device secondary phase splitting device (45) is provided with washing device secondary mixed phase import (48), washing device secondary heavy out (49) and washing device secondary light phase export (50), washing device secondary mulser import (46) is connected with washing device secondary detergent inlet (51) and washing device secondary solvent import (52), and washing device secondary mulser outlet (47) is connected with washing device secondary mixed phase import (48); Washing device one-level light phase export (41) is connected with washing device secondary solvent import (52) by pipeline, and washing device secondary heavy out (49) is connected with washing device one-level detergent inlet (42) by pipeline;

Back extraction device comprises back extraction device one-level mulser (62) and back extraction device one-level phase splitting device (63), back extraction device secondary mulser (71) and back extraction device secondary phase splitting device (72), back extraction device one-level mulser (62) is provided with back extraction device one-level mulser import (64) and back extraction device one-level mulser outlet (65), back extraction device one-level phase splitting device (63) is provided with back extraction device one-level mixed phase import (66), back extraction device one-level heavy out (67) and back extraction device one-level light phase export (68), back extraction device one-level mulser import (64) is connected with back extraction device one-level reverse-extraction agent import (69) and back extraction device one-level solvent inlet (70), and back extraction device one-level mulser outlet (65) is connected with back extraction device one-level mixed phase import (66); Back extraction device secondary mulser (71) is provided with back extraction device secondary mulser import (73) and back extraction device secondary mulser outlet (74), back extraction device secondary phase splitting device (72) is provided with back extraction device secondary mixed phase import (75), back extraction device secondary heavy out (76) and back extraction device secondary light phase export (77), back extraction device secondary mulser import (73) is connected with back extraction device secondary reverse-extraction agent import (78) and back extraction device secondary solvent import (79), and back extraction device secondary mulser outlet (74) is connected with back extraction device secondary mixed phase import (75); Back extraction device one-level light phase export (68) is connected with back extraction device secondary solvent import (79) by pipeline, and back extraction device secondary heavy out (76) is connected with back extraction device one-level reverse-extraction agent import (69) by pipeline.

2, phosphoric acid purification device as claimed in claim 1, it is characterized in that: comprise extraction plant mixing tank B (18) and extraction plant phase splitting device C (19), extraction plant mixing tank B (18) is provided with extraction plant mixing tank B continuous phase fluid inlet (20), extraction plant mixing tank B dispersed phase fluid inlet (21) and extraction plant mixing tank B mixed phase fluid outlet (22), extraction plant phase splitting device C (19) is provided with extraction plant phase splitting device C mixed phase import (23), extraction plant phase splitting device C heavy out (25) and extraction plant phase splitting device C light phase export (24), extraction plant mixing tank B mixed phase fluid outlet (22) is connected with extraction plant phase splitting device C mixed phase import (23); Extraction plant phase splitting device B light phase export (15) is connected with extraction plant mixing tank B continuous phase fluid inlet (20), extraction plant phase splitting device C heavy out (25) is connected with extraction plant phosphoric acid import (16), and extraction plant phase splitting device C light phase export (24) is connected with washing device one-level solvent inlet (43);

Washing device comprises three grades of mulsers of washing device (53) and three grades of phase-splitting equipment of washing device (54), three grades of mulsers of washing device (53) are provided with three grades of mulser imports of washing device (55) and three grades of mulser outlets of washing device (56), three grades of phase-splitting equipment of washing device (54) are provided with three grades of mixed phase imports of washing device (57), three grades of light phase exports of three grades of heavy outs of washing device (58) and washing device (59), three grades of mulser imports of washing device (55) are connected with three grades of detergent inlet of washing device (60) and three grades of solvent inlets of washing device (61), and three grades of mulser outlets of washing device (56) are connected with three grades of mixed phase imports of washing device (57); Washing device secondary light phase export (50) is connected with three grades of solvent inlets of washing device (61), three grades of heavy outs of washing device (58) are connected with washing device secondary detergent inlet (51), and three grades of phase-splittings of washing device are established light phase export (59) and are connected with back extraction device one-level solvent inlet (70);

Back extraction device comprises three grades of mulsers of back extraction device (80) and three grades of phase-splitting equipment of back extraction device (81), three grades of mulsers of back extraction device (80) are provided with three grades of mulser imports of back extraction device (82) and three grades of mulser outlets of back extraction device (83), three grades of phase-splitting equipment of back extraction device (81) are provided with three grades of mixed phase imports of back extraction device (84), three grades of light phase exports of three grades of heavy outs of back extraction device (85) and back extraction device (86), three grades of mulser imports of back extraction device (82) are connected with three grades of reverse-extraction agent imports of back extraction device (87) and three grades of solvent inlets of back extraction device (88), and three grades of mulser outlets of back extraction device (83) are connected with three grades of mixed phase imports of back extraction device (84); Back extraction device secondary light phase export (77) is connected with three grades of solvent inlets of back extraction device (88), three grades of heavy outs of back extraction device (85) are connected with back extraction device secondary reverse-extraction agent import (78), and three grades of phase-splittings of back extraction device are established light phase export (86) and are connected with extraction plant continuous phase fluid inlet (3).

3, phosphoric acid purification device as claimed in claim 1, it is characterized in that: comprise extraction plant mulser B (26) and extraction plant phase splitting device D (27), extraction plant mulser B (26) is provided with extraction plant mulser B import (28) and extraction plant mulser B outlet (29), extraction plant phase splitting device D (27) is provided with extraction plant phase splitting device D mixed phase import (30), extraction plant phase splitting device D heavy out (31) and extraction plant phase splitting device D light phase export (32), extraction plant mulser B import (28) is connected with three grades of phosphoric acid imports of extraction plant (33) and three grades of solvent inlets of extraction plant (34), and extraction plant mulser B outlet (29) is connected with extraction plant phase splitting device D mixed phase import (30); Extraction plant phase splitting device B light phase export (15) is connected with three grades of solvent inlets of extraction plant (34), extraction plant phase splitting device D heavy out (31) is connected with extraction plant phosphoric acid import (16), and extraction plant phase splitting device D light phase export (32) is connected with washing device one-level solvent inlet (43);