CN201458729U

CN201458729U - Device for purifying phosphoric acid

Info

Publication number: CN201458729U
Application number: CN2009201255356U
Authority: CN
Inventors: 王邵东; 冉瑞泉; 吕阳成; 闵胜益
Original assignee: Wengfu Group Co Ltd
Current assignee: Wengfu Group Co Ltd
Priority date: 2009-07-15
Filing date: 2009-07-15
Publication date: 2010-05-12
Anticipated expiration: 2019-07-15

Abstract

The utility model discloses a device for purifying phosphoric acid, comprising an extraction plant, a cleaning plant and a back extraction plant, wherein the extraction plant and the cleaning plant comprise a set of blender and phase separation plant and a set of emulsifying machine and phase separation plant, or one or more additional sets of blenders and phase separation plants (or emulsifying machines and phase separation plants) to form multiple stages, and the back extraction plant comprises two sets of blenders and phase separation plants to form two stages, or more sets of blenders and phase separation plants to form multiple stages. A continuous-phase fluid inlet of the extraction plant is connected with a final light-phase outlet of the back extraction plant, a continuous-phase fluid inlet of the cleaning plant is connected with a final light-phase outlet of the extraction plant, and a continuous-phase fluid inlet of the back extraction plant is connected with a final light-phase outlet of the cleaning plant. The device for purifying phosphoric acid can strengthen mass transfer performance, increase purification efficiency, reduce equipment investment and running expense, and save floor space.

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 mulser 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.

Mulser 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 mixing tank 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.Mixing tank 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 washing device mixing tank A continuous phase fluid inlet, washing device phase splitting device B light phase export is connected with back extraction device continuous phase fluid inlet, and back extraction device secondary light phase export is connected with extraction plant mixing tank A 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, and 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; Extraction plant phase splitting device B light phase export is connected with washing device mixing tank A continuous phase fluid inlet;

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

Back extraction device comprises back extraction device mixing tank and back extraction device phase splitting device, back extraction device secondary mixing tank and back extraction device secondary phase splitting device, the back extraction device mixing tank is provided with back extraction device continuous phase fluid inlet, back extraction device connects dispersed phase fluid inlet and the outlet of back extraction device mixed phase fluid, the back extraction device phase splitting device is provided with the import of back extraction device mixed phase, back extraction device heavy out and back extraction device light phase export, and the outlet of back extraction device mixed phase fluid is connected with the import of back extraction device mixed phase.Back extraction device secondary mixing tank is provided with back extraction device secondary continuous phase fluid inlet, back extraction device connects secondary dispersed phase fluid inlet and the outlet of back extraction device secondary mixed phase fluid, 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, and the outlet of back extraction device secondary mixed phase fluid is connected with the import of back extraction device secondary mixed phase; The back extraction device light phase export (is connected with back extraction device secondary continuous phase fluid inlet by pipeline; Back extraction device secondary heavy out connects the dispersed phase fluid inlet by pipeline and back extraction device and is connected.

Above-mentioned phosphoric acid purification device, wherein: extraction plant comprises 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, 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 A light phase export is connected with the 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 B heavy out is connected with extraction plant mixing tank A dispersed phase fluid inlet by pipeline; 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; Extraction plant phase splitting device C light phase export is connected with washing device mixing tank A continuous phase fluid inlet.

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

Back extraction device comprises three grades of mixing tanks of back extraction device and three grades of phase-splitting equipment of back extraction device, three grades of mixing tanks of back extraction device are provided with back extraction device three grades of continuous phase fluid inlets, back extraction devices and connect three grades of dispersion phase fluid inlets and three grades of mixed phase fluid 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, and three grades of mixed phase fluid outlets of back extraction device are connected with three grades of mixed phase imports of back extraction device; Three grades of continuous phase fluid inlets of back extraction device secondary light phase export and back extraction device are connected, three grades of heavy outs of back extraction device are connected with back extraction device secondary dispersed phase fluid inlet, and three grades of light phase exports of back extraction device are connected with extraction plant mixing tank A continuous phase fluid inlet.

Above-mentioned phosphoric acid purification device, wherein: extraction plant comprises 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, and 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 B mixed phase.Extraction plant phase splitting device A light phase export is connected with the 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 D heavy out is connected with extraction plant mixing tank A dispersed phase fluid inlet by pipeline; Three grades of solvent inlets of extraction plant phase splitting device B light phase export and extraction plant are connected, and extraction plant phase splitting device D heavy out is connected with the import of extraction plant phosphoric acid; Extraction plant phase splitting device D light phase export is connected with washing device mixing tank A continuous phase fluid inlet.

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

Back extraction device comprises three grades of mixing tanks of back extraction device and three grades of phase-splitting equipment of back extraction device, three grades of mixing tanks of back extraction device are provided with three grades of continuous phase fluid inlet back extraction devices of back extraction device and connect three grades of dispersion phase fluid inlets and three grades of mixed phase fluid 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, and three grades of mixed phase fluid outlets of back extraction device are connected with three grades of mixed phase imports of back extraction device; Three grades of continuous phase fluid inlets of back extraction device secondary light phase export and back extraction device are connected, three grades of heavy outs of back extraction device are connected with back extraction device secondary dispersed phase fluid inlet, and three grades of light phase exports of back extraction device are connected with extraction plant mixing tank A continuous phase fluid 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: mixing tank is a pipeline high-shear dispersion mixer.

The utility model compared with prior art, as can be known from the above technical solutions, require difference according to purifying, extraction plant, the washing device that constitutes phosphoric acid purification device 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 the multistage of one or more groups mixing tank and phase splitting device (or mulser and phase splitting device) formation on aforesaid combination; Back extraction device select for use secondary that two groups of mixing tanks and phase splitting device constitute or by multiple mixer and phase splitting device combine multistage.In the phosphoric acid purification process, feed phosphoric acid (fresh phosphoric), washing acid (purifying phosphoric acid) add by mixing tank, mulser dispersed phase fluid inlet, the phosphoric acid import of final stage extraction plant, washing device, and de-salted water adds by final stage back extraction device mixer disperses phase fluid inlet.The no-load solvent of extraction plant continuous phase fluid inlet is from back extraction device final stage light phase export, the loaded solvent of washing device continuous phase fluid inlet is from extraction plant final stage light phase export, and the loaded solvent of back extraction device continuous phase fluid inlet is from washing device final stage light phase export.Because mixing tank, mulser mass transfer area are big, the mass-transfer efficiency height.The mixed solution that comes out from mixing tank, mulser 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; Mixing tank, mulser floor space are little, and appliance arrangement is arranged simple, and factory building can be realized miniaturization; Mixing tank, mulser 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 mixing tank A, 36, washing device phase splitting device A, 37, washing device mixing tank A continuous phase fluid inlet, 38, washing device mixing tank A dispersed phase fluid inlet, 39, the outlet of washing device mixing tank A mixed phase fluid, 40, the import of washing device phase splitting device A mixed phase, 41, washing device phase splitting device A light phase export, 42, washing device phase splitting device A heavy out, 43, washing device mulser A, 44, washing device phase splitting device B, 45, washing device mulser A import, 46, washing device mulser A outlet, 47, the import of washing device phase splitting device B mixed phase, 48, washing device phase splitting device B heavy out, 49, washing device phase splitting device B light phase export, 50, the import of washing device phosphoric acid, 51, the washing device solvent inlet, 52, washing device mixing tank B, 53, washing device phase splitting device C, 54, washing device mixing tank B continuous phase fluid inlet, 55, washing device mixing tank B dispersed phase fluid inlet, 56, the outlet of washing device mixing tank B mixed phase fluid, 57, the import of washing device phase splitting device C mixed phase, 58, washing device phase splitting device C light phase export, 59, washing device phase splitting device C heavy out, 60, washing device mulser B, 61, washing device phase splitting device D, 62, washing device mulser B import, 63, washing device mulser B outlet, 64, the import of washing device phase splitting device D mixed phase, 65, washing device phase splitting device D heavy out, 66, washing device phase splitting device D light phase export, 67, three grades of phosphoric acid imports of washing device, 68, three grades of solvent inlets of washing device, 69, the back extraction device mixing tank, 70, the back extraction device phase splitting device, 71, back extraction device continuous phase fluid inlet, 72, back extraction device dispersed phase fluid inlet, 73, the outlet of back extraction device mixed phase fluid, 74, the import of back extraction device mixed phase, 75, the back extraction device light phase export, 76, the back extraction device heavy out, 77, back extraction device secondary mixing tank, 78, back extraction device secondary phase splitting device, 79, back extraction device secondary continuous phase fluid inlet, 80, back extraction device secondary dispersed phase fluid inlet, 81, the outlet of back extraction device secondary mixed phase fluid, 82, the import of back extraction device secondary mixed phase, 83, back extraction device secondary light phase export, 84, back extraction device secondary heavy out, 85, three grades of mixing tanks of back extraction device, 86, three grades of phase-splitting equipment of back extraction device, 87, three grades of continuous phase fluid inlets of back extraction device, 88, back extraction device disperses phase fluid inlet, 89 for three grades, three grades of mixed phase fluid outlets of back extraction device, 90, three grades of mixed phase imports of back extraction device, 91, three grades of light phase exports of back extraction device, 92, three grades of heavy outs of back extraction device.

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 15 is connected with washing device mixing tank A continuous phase fluid inlet 37, washing device phase splitting device B light phase export 49 is connected with back extraction device continuous phase fluid inlet 71, and back extraction device secondary light phase export 83 is connected with extraction plant mixing tank A 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 the 15. extraction plant mulser A imports 11 of extraction plant phase splitting device B light phase export and 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 mixing tank A35 and washing device phase splitting device A36, washing device mulser A43 and washing device phase splitting device B44, washing device mixing tank A35 is provided with washing device mixing tank A continuous phase fluid inlet 37, washing device mixing tank A dispersed phase fluid inlet 38 and washing device mixing tank A mixed phase fluid outlet 39, washing device phase splitting device A36 is provided with washing device phase splitting device A mixed phase import 40, washing device phase splitting device A heavy out 42 and washing device phase splitting device A light phase export 41, washing device mixing tank A mixed phase fluid outlet 39 are connected with washing device phase splitting device A mixed phase import 40; Washing device mulser A43 is provided with washing device mulser A import 45 and washing device mulser A outlet 46, and washing device phase splitting device B44 is provided with washing device phase splitting device B mixed phase import 47, washing device phase splitting device B heavy out 48 and washing device phase splitting device B light phase export 49.Washing device mulser A import 45 is connected with washing device phosphoric acid import 50 and washing device solvent inlet 51, and washing device mulser A outlet 46 is connected with washing device phase splitting device B mixed phase import 47; Washing device phase splitting device A light phase export 41 is connected with washing device solvent inlet 51, and washing device phase splitting device B heavy out 48 is connected with washing device mixing tank A dispersed phase fluid inlet 38 by pipeline.

Back extraction device comprises back extraction device mixing tank 69 and back extraction device phase splitting device 70, back extraction device secondary mixing tank 77 and back extraction device secondary phase splitting device 78, back extraction device mixing tank 69 is provided with back extraction device continuous phase fluid inlet 71, back extraction device dispersed phase fluid inlet 72 and back extraction device mixed phase fluid outlet 73, back extraction device phase splitting device 70 is provided with back extraction device mixed phase import 74, back extraction device heavy out 76 and back extraction device light phase export 75, and back extraction device mixed phase fluid outlet 73 is connected with back extraction device mixed phase import 74; Back extraction device secondary mixing tank 77 is provided with back extraction device secondary continuous phase fluid 79 back extraction devices that enter the mouth and connects secondary dispersed phase fluid inlet 80 and back extraction device secondary mixed phase fluid outlet 81, back extraction device secondary phase splitting device 78 is provided with back extraction device secondary mixed phase import 82, back extraction device secondary heavy out 84 and back extraction device secondary light phase export 83, and back extraction device secondary mixed phase fluid outlet 81 is connected with back extraction device secondary mixed phase import 82; Back extraction device light phase export 75, the pipeline by being provided with pump and back extraction device secondary continuous phase fluid inlet 79 are connected; Back extraction device secondary heavy out 84, the pipeline by being provided with pump and back extraction device dispersed phase fluid inlet 72 are connected.

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 83) 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 mixing tank A continuous phase fluid inlet 37 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 comes out from washing device phase splitting device B heavy out 48 enters the mouth 38 from washing device mixing tank A dispersed phase fluid under the effect of pump, loaded solvent from extraction plant enters washing device mixing tank A35 from washing device mixing tank A continuous phase fluid inlet 37, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device mixing tank A35, the mixed phase that forms comes out from washing device mixing tank A mixed phase fluid outlet 39, enter washing device phase splitting device A36. realizes mixed phase in washing device phase splitting device A36 layering by washing device phase splitting device A mixed phase import 40, what form is light, heavy two-phase. impurity enters heavy phase to be become and washes spent acid and discharge from washing device phase splitting device A heavy out 42, the loaded solvent of eccysis partial impurities comes out from washing device phase splitting device B light phase export 41, enters washing device mulser A43 through washing device solvent inlet 51 under the effect of pump; Washing acid (purifying phosphoric acid) enters washing device mulser A43 through washing device phosphoric acid import 50, efficient mass transfer effect by washing device mulser A43, further improve washing effect, the mixed phase that forms comes out from washing device mulser A outlet 46, enter washing device phase splitting device B44 by washing device phase splitting device B mixed phase import 47, in washing device phase splitting device B44, realize the layering of mixed phase, what form is light, heavy two-phase, the loaded solvent that has been purified by phosphoric acid washing enters back extraction device one-level solvent inlet 77 from washing device phase splitting device B light phase export 49, heavy phase is then returned washing device mixing tank A35 by washing device phase splitting device B heavy out 48, thereby realizes washing, purifying.

At back extraction device, the phosphoric acid that back extraction device back extraction device secondary heavy out 84 comes out, the loaded solvent that return back extraction device back extraction device dispersed phase fluid inlet 72 under the effect of pump, comes from washing device enters back extraction device mixing tank 69 from back extraction device continuous phase fluid inlet 71, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mixing tank 69, the mixed phase that forms comes out from back extraction device mixed phase fluid outlet 73, enters back extraction device phase splitting device 70 by back extraction device mixed phase import 74.In back extraction device phase splitting device 70, 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 76 discharges of back extraction device heavy out, the loaded solvent of being taken off part phosphoric acid comes out from back extraction device light phase export 75, enters back extraction device secondary mixing tank 77 through back extraction device secondary continuous phase fluid inlet 79 under the effect of pump.De-salted water enters back extraction device secondary mixing tank 77 through back extraction device secondary dispersed phase fluid inlet 80, efficient mass transfer effect by back extraction device secondary mixing tank 77, further improve the molten back extraction effect of load, the mixed phase that forms comes out from back extraction device secondary mixed phase fluid outlet 81, enter back extraction device secondary phase splitting device 78 by back extraction device secondary phase splitting device mixed phase import 82, in back extraction device secondary phase splitting device 78, 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 83, and the phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device mixing tank 69 by back extraction device heavy out 84.Realize the recycle of extraction agent.

Embodiment 2

Referring to Fig. 2, phosphoric acid purification device, 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; Extraction plant phase splitting device C light phase export 24 is connected with washing device mixing tank A continuous phase fluid inlet 37.

Washing device comprises washing device mixing tank B52 and washing device phase splitting device C53, washing device mixing tank B52 is provided with washing device mixing tank B continuous phase fluid inlet 54, washing device mixing tank B dispersed phase fluid inlet 55 and washing device mixing tank B mixed phase fluid outlet 56, washing device phase splitting device C53 is provided with washing device phase splitting device C mixed phase import 57, washing device phase splitting device C heavy out 59 and washing device phase splitting device C light phase export 58, washing device mixing tank B mixed phase fluid outlet 56 are connected with washing device phase splitting device C mixed phase import 57; Washing device phase splitting device B light phase export 49 is connected with washing device mixing tank B continuous phase fluid inlet 54, washing device phase splitting device C heavy out 59 is connected with washing device phosphoric acid import 50, and washing device phase splitting device C light phase export 58 is connected with back extraction device continuous phase fluid inlet 71;

Back extraction device comprises three grades of mixing tanks 85 of back extraction device and three grades of phase-splitting equipment 86 of back extraction device, three grades of mixing tanks 85 of back extraction device are provided with three grades of continuous phase fluids of back extraction device, 87 back extraction devices that enter the mouth and connect three grades and disperse phase fluids inlet 88 and three grades of mixed phase fluid outlets 89 of back extraction device, three grades of phase-splitting equipment 86 of back extraction device are provided with three grades of mixed phase imports 90 of back extraction device, three grades of heavy outs 92 of back extraction device and three grades of light phase exports 91 of back extraction device, and three grades of mixed phase fluid of back extraction device outlet 89 is connected with three grades of mixed phase imports 90 of back extraction device; Three grades of continuous phase fluid inlets 87 of back extraction device secondary light phase export 83 and back extraction device are connected, three grades of heavy outs 92 of back extraction device are connected with back extraction device secondary dispersed phase fluid inlet 80, and three grades of light phase exports 91 of back extraction device are connected with extraction plant mixing tank A continuous phase fluid inlet 3.All the other are with embodiment 1.

Embodiment 3

Referring to Fig. 3, phosphoric acid purification device, 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, and 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, and extraction plant phase splitting device D heavy out 31 is connected with extraction plant phosphoric acid import 16; Extraction plant phase splitting device D light phase export 32 is connected with washing device mixing tank A continuous phase fluid inlet 37.

Washing device comprises washing device mulser B60 and washing device phase splitting device D61, washing device mulser B60 is provided with washing device mulser B import 62 and washing device mulser B outlet 63, washing device phase splitting device D61 is provided with washing device phase splitting device D mixed phase import 64, washing device phase splitting device D heavy out 65 and washing device phase splitting device D light phase export 66, three grades of phosphoric acid imports 67 of washing device mulser B import 62 and washing device and three grades of solvent inlets 68 of washing device are connected, and washing device mulser B outlet 63 is connected with washing device phase splitting device D mixed phase import 64.Three grades of solvent inlets 68 of washing device phase splitting device B light phase export 49 and washing device are connected, and washing device phase splitting device D heavy out 65 is connected with washing device phosphoric acid import 50; Washing device phase splitting device D light phase export 66 is connected with back extraction device continuous phase fluid inlet 71.

Back extraction device comprises three grades of mixing tanks 85 of back extraction device and three grades of phase-splitting equipment 86 of back extraction device, three grades of mixing tanks 85 of back extraction device are provided with three grades of continuous phase fluids of back extraction device, 87 back extraction devices that enter the mouth and connect three grades and disperse phase fluids inlet 88 and three grades of mixed phase fluid outlets 89 of back extraction device, three grades of phase-splitting equipment 86 of back extraction device are provided with three grades of mixed phase imports 90 of back extraction device, three grades of heavy outs 92 of back extraction device and three grades of light phase exports 91 of back extraction device, and three grades of mixed phase fluid of back extraction device outlet 89 is connected with three grades of mixed phase imports 90 of back extraction device; Three grades of continuous phase fluid inlets 87 of back extraction device secondary light phase export 83 and back extraction device are connected, three grades of heavy outs 92 of back extraction device are connected with back extraction device secondary dispersed phase fluid inlet 80, and three grades of light phase exports 91 of back extraction device are connected with extraction plant mixing tank A continuous phase fluid inlet 3. and all the other are with embodiment 1.

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 91 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.

At washing device, the loaded solvent that comes out from washing device phase splitting device B light phase export 49, enter washing device mulser B60 through three grades of solvent inlets 68 of washing device under the effect of pump, washing acid (purifying phosphoric acid) enters washing device mulser B60 through three grades of phosphoric acid imports 67 of washing device; The mixed phase that forms comes out from washing device mulser B outlet 63, enter washing device phase splitting device D61 by washing device phase splitting device D mixed phase import 64, in washing device phase splitting device D61, realize the layering of mixed phase, light, the heavy two-phase that forms, washing, purifying loaded solvent come out to enter back extraction device from washing device phase splitting device D light phase export 66; Heavy phase is then come out by washing device phase splitting device D heavy out 65, returns washing device mulser A43 by washing device phosphoric acid import 50 under the effect of pump; Loaded solvent comes out, enters washing device mulser A43 through washing device solvent inlet 51 under the effect of pump from washing device phase splitting device A light phase export 41, efficient mass transfer effect by washing device mulser A43, the mixed phase that forms comes out from washing device mulser A outlet 46, enter washing device phase splitting device B44 by washing device phase splitting device B mixed phase import 47, in washing device phase splitting device B44, realize the layering of mixed phase, light, the heavy two-phase of formation.Loaded solvent enters washing device mulser B60 from washing device phase splitting device B light phase export 49, heavy phase then enters the mouth 38 from washing device mixing tank A dispersed phase fluid by washing device phase splitting device B heavy out 48 under the effect of pump, loaded solvent all enters washing device mixing tank A35 from washing device mixing tank A continuous phase fluid inlet 37, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device mixing tank A35, the mixed phase that forms comes out from washing device mixing tank A mixed phase fluid outlet 39, enters washing device phase splitting device A36 by washing device phase splitting device A mixed phase import 40.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 phase splitting device A heavy out 42, and the loaded solvent of washing impurity off comes out to enter washing device mulser A43 from washing device phase splitting device A light phase export 41.

At back extraction device, the phosphoric acid that back extraction device back extraction device secondary heavy out 84 comes out, under the effect of pump, return back extraction device back extraction device dispersed phase fluid inlet 72, the loaded solvent that comes from washing device enters back extraction device mixing tank 69 from back extraction device continuous phase fluid inlet 71, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mixing tank 69, the mixed phase that forms comes out from back extraction device mixed phase fluid outlet 73, enter back extraction device phase splitting device 70. is realized mixed phase in back extraction device phase splitting device 70 layering by back extraction device mixed phase import 74, what form is light, heavy two-phase. the phosphoric acid in the loaded solvent enters heavy phase becomes purifying phosphoric acid from 76 discharges of back extraction device heavy out, the loaded solvent of being taken off part phosphoric acid comes out from back extraction device light phase export 75, under the effect of pump, enter the phosphoric acid that three grades of heavy outs 92 of back extraction device secondary mixing tank 77. back extraction devices come out through back extraction device secondary continuous phase fluid inlet 79, under the effect of pump, return back extraction device secondary mixing tank 77, efficient mass transfer effect by back extraction device secondary mixing tank 77, the mixed phase that forms comes out from back extraction device secondary mixed phase fluid outlet 81, enter back extraction device secondary phase splitting device 78 by back extraction device secondary phase splitting device mixed phase import 82, in back extraction device secondary phase splitting device 78, realize the layering of mixed phase, what form is light, heavy two-phase, phosphoric acid in the loaded solvent enters heavy phase and returns the loaded solvent that back extraction device mixing tank 69. also contains part phosphoric acid by back extraction device heavy out 84 and come out from back extraction device secondary light phase export 83, under the effect of pump, enter the mouth 87 through three grades of continuous phase fluids of back extraction device, de-salted water disperses phase fluid inlet 88 to enter three grades of mixing tanks 85 of back extraction device through three grades of back extraction devices, by the efficient mass transfer effect of multistage back extraction device mixing tank, improved phosphoric acid back extraction effect as much as possible; The mixed phase that forms comes out from three grades of mixed phase fluid outlets 89 of back extraction device, enter three grades of phase-splitting equipment 86 of back extraction device by three grades of phase-splitting equipment of back extraction device mixed phase import 90, in three grades of phase-splitting equipment 86 of back extraction device, 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 come out to return extraction plant from three grades of light phase exports of back extraction device 91, phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device secondary mixing tank 77. by three grades of back extractions by three grades of heavy outs 92 of back extraction device, phosphoric acid in the loaded solvent is desalted the water back extraction and enters heavy phase finally from the discharge of back extraction device phase splitting device heavy phase mouth, becomes purifying phosphoric acid. and all the other are with embodiment 1.

More than among three embodiment: mixing tank adopts pipeline high-shear dispersion mixer; Phase splitting device adopts phase-splitting groove, clarifying tank etc. to reach the equipment of phase-splitting purpose; Mulser 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. 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 mixing tank A continuous phase fluid inlet (37), washing device phase splitting device B light phase export (49) is connected with back extraction device continuous phase fluid inlet (71), and back extraction device secondary light phase export (83) is connected with extraction plant mixing tank A 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 mixing tank A (35) and washing device phase splitting device A (36), washing device mulser A (43) and washing device phase splitting device B (44), washing device mixing tank A (35) is provided with washing device mixing tank A continuous phase fluid inlet (37), washing device mixing tank A dispersed phase fluid inlet (38) and washing device mixing tank A mixed phase fluid outlet (39), washing device phase splitting device A (36) is provided with washing device phase splitting device A mixed phase import (40), washing device phase splitting device A heavy out (42) and washing device phase splitting device A light phase export (41), washing device mixing tank A mixed phase fluid outlet (39) is connected with washing device phase splitting device A mixed phase import (40); Washing device mulser A (43) is provided with washing device mulser A import (45) and washing device mulser A outlet (46), washing device phase splitting device B (44) is provided with washing device phase splitting device B mixed phase import (47), washing device phase splitting device B heavy out (48) and washing device phase splitting device B light phase export (49), washing device mulser A import (45) is connected with washing device phosphoric acid import (50) and washing device solvent inlet (51), and washing device mulser A outlet (46) is connected with washing device phase splitting device B mixed phase import (47); Washing device phase splitting device A light phase export (41) is connected with washing device solvent inlet (51), and washing device phase splitting device B heavy out (48) is connected with washing device mixing tank A dispersed phase fluid inlet (38) by pipeline;

Back extraction device comprises back extraction device mixing tank (69) and back extraction device phase splitting device (70), back extraction device secondary mixing tank (77) and back extraction device secondary phase splitting device (78), back extraction device mixing tank (69) is provided with back extraction device continuous phase fluid inlet (71), back extraction device connects dispersed phase fluid inlet (72) and back extraction device mixed phase fluid outlet (73), back extraction device phase splitting device (70) is provided with back extraction device mixed phase import (74), back extraction device heavy out (76) and back extraction device light phase export (75), back extraction device mixed phase fluid outlet (73) is connected with back extraction device mixed phase import (74); Back extraction device secondary mixing tank (77) is provided with back extraction device secondary continuous phase fluid inlet (79), back extraction device connects secondary dispersed phase fluid inlet (80) and back extraction device secondary mixed phase fluid outlet (81), back extraction device secondary phase splitting device (78) is provided with back extraction device secondary mixed phase import (82), back extraction device secondary heavy out (84) and back extraction device secondary light phase export (83), and back extraction device secondary mixed phase fluid outlet (81) is connected with back extraction device secondary mixed phase import (82); Back extraction device light phase export (75) is connected with back extraction device secondary continuous phase fluid inlet (79) by pipeline; Back extraction device secondary heavy out (84) connects dispersed phase fluid inlet (72) by pipeline and back extraction device and is connected.

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 mixing tank A continuous phase fluid inlet (37);

Washing device comprises washing device mixing tank B (52) and washing device phase splitting device C (53), washing device mixing tank B (52) is provided with washing device mixing tank B continuous phase fluid inlet (54), washing device mixing tank B dispersed phase fluid inlet (55) and washing device mixing tank B mixed phase fluid outlet (56), washing device phase splitting device C (53) is provided with washing device phase splitting device C mixed phase import (57), washing device phase splitting device C heavy out (59) and washing device phase splitting device C light phase export (58), washing device mixing tank B mixed phase fluid outlet (56) is connected with washing device phase splitting device C mixed phase import (57); Washing device phase splitting device B light phase export (49) is connected with washing device mixing tank B continuous phase fluid inlet (54), washing device phase splitting device C heavy out (59) is connected with washing device phosphoric acid import (50), and washing device phase splitting device C light phase export (58) is connected with back extraction device continuous phase fluid inlet (71);

Back extraction device comprises three grades of mixing tanks of back extraction device (85) and three grades of phase-splitting equipment of back extraction device (86), three grades of mixing tanks of back extraction device (85) are provided with three grades of continuous phase fluid inlet (87) back extraction devices of back extraction device and connect three grades of dispersion phase fluid inlets (88) and three grades of mixed phase fluid outlets of back extraction device (89), three grades of phase-splitting equipment of back extraction device (86) are provided with three grades of mixed phase imports of back extraction device (90), three grades of light phase exports of three grades of heavy outs of back extraction device (92) and back extraction device (91), three grades of mixed phase fluid outlets of back extraction device (89) are connected with three grades of mixed phase imports of back extraction device (90); Back extraction device secondary light phase export (83) is connected with three grades of continuous phase fluid inlets of back extraction device (87), three grades of heavy outs of back extraction device (92) are connected with back extraction device secondary dispersed phase fluid inlet (80), and three grades of light phase exports of back extraction device (91) are connected with extraction plant mixing tank A 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 mixing tank A continuous phase fluid inlet (37);

Washing device comprises washing device mulser B (60) and washing device phase splitting device D (61), washing device mulser B (60) is provided with washing device mulser B import (62) and washing device mulser B outlet (63), washing device phase splitting device D (61) is provided with washing device phase splitting device D mixed phase import (64), washing device phase splitting device D heavy out (65) and washing device phase splitting device D light phase export (66), washing device mulser B import (62) is connected with three grades of phosphoric acid imports of washing device (67) and three grades of solvent inlets of washing device (68), and washing device mulser B outlet (63) is connected with washing device phase splitting device D mixed phase import (64); Washing device phase splitting device B light phase export (49) is connected with three grades of solvent inlets of washing device (68), washing device phase splitting device D heavy out (65) is connected with washing device phosphoric acid import (50), and washing device phase splitting device D light phase export (66) is connected with back extraction device continuous phase fluid inlet (71);

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 divides mulser for the pipeline high-shear.