CN201458739U - Device for purifying phosphoric acid - Google Patents

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 comprises a set of emulsifying machine and phase separation plant and a set of blender and phase separation plant, or one or more additional sets of emulsifying machines and phase separation plants (or blenders and phase separation plants), and the cleaning plant and the back extraction plant comprise two sets of blenders and phase separation plants, or one or more additional sets of blenders and phase separation plants. A primary solvent inlet of the extraction plant is connected with a light-phase outlet of the final phase separation plant of the back extraction plant, a continuous-phase fluid inlet of the cleaning plant is connected with a light-phase outlet of the final phase separation plant of the extraction plant, and a continuous-phase fluid inlet of the back extraction plant is connected with a light-phase outlet of the final phase separation plant 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 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 continuous phase fluid inlet, washing device secondary light phase export is connected with back extraction device continuous phase fluid inlet, and back extraction device secondary light phase export is connected with the extraction plant solvent inlet;

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

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

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

Washing device comprises three grades of mixing tanks of washing device and three grades of phase-splitting equipment of washing device, three grades of mixing tanks of washing device are provided with three grades of continuous phase fluid inlets of washing device, washing device disperses phase fluid inlet and three grades of mixed phase fluid outlets of washing device for three grades, 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, and three grades of mixed phase fluid outlets of washing device are connected with three grades of mixed phase imports of washing device; Three grades of continuous phase fluid 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 dispersed phase fluid inlet, and three grades of light phase exports of washing device are 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, and 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 the extraction plant solvent inlet.

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

Washing device comprises three grades of mixing tanks of washing device and three grades of phase-splitting equipment of washing device, three grades of mixing tanks of washing device are provided with three grades of continuous phase fluid inlets of washing device, washing device disperses phase fluid inlet and three grades of mixed phase fluid outlets of washing device for three grades, 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, and three grades of mixed phase fluid outlets of washing device are connected with three grades of mixed phase imports of washing device; Three grades of continuous phase fluid 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 dispersed phase fluid inlet, and three grades of light phase exports of washing device are 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, and 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 the extraction plant solvent inlet.

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

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

The utility model compared with prior art, as can be known from the above technical solutions, require difference according to purifying, the extraction plant that constitutes phosphoric acid purification device is selected the combination of one group of mulser and phase splitting device and one group of mixing tank and phase splitting device for use, or increases the multistage of one or more groups mulser and phase splitting device (or mixing tank and phase splitting device) formation on aforesaid combination; Washing device, back extraction device is selected two groups of mixing tanks and phase splitting device for use, or increasing one or more groups mixing tank and phase splitting device .. on the aforesaid combination in the phosphoric acid purification process, feed phosphoric acid (fresh phosphoric) is by the mixing tank of final stage extraction plant, mulser dispersed phase fluid inlet, the phosphoric acid import adds, washing acid (purifying phosphoric acid), de-salted water is entered the mouth by washing device final stage mixer disperses phase fluid, back extraction device final stage mixer disperses phase fluid inlet adds, the no-load solvent of extraction plant one-level solvent inlet is from the light phase export of back extraction device final stage phase splitting device, the loaded solvent of washing device continuous phase fluid inlet is from the light phase export of extraction plant final stage phase splitting device, the loaded solvent of back extraction device continuous phase fluid inlet is from the light phase export of washing device final stage phase splitting device. because mulser, the mixing tank mass transfer area is big, the mass-transfer efficiency height. from mulser, the mixed solution that mixing tank comes out is easy to phase-splitting, thereby guaranteeing 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) leaks 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 the structural representation of embodiment 1;

Fig. 2 is the structural representation of embodiment 2;

Fig. 3 is the structural representation of embodiment 3.

Mark among the figure:

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

Extraction plant comprises extraction plant mulser A1 and extraction plant phase splitting device A2, extraction plant mixing tank A10 and extraction plant phase splitting device B11, extraction plant mulser A1 is provided with extraction plant mulser A import 3, extraction plant mulser A outlet 4, collection device phase splitting device A2 is provided with extraction plant mixed phase import 5, extraction plant heavy out 6 and extraction plant light phase export 7, extraction plant mulser import 3 is connected with extraction plant solvent inlet 9 with extraction plant phosphoric acid import 8, and extraction plant mulser A outlet 4 is connected with extraction plant phase splitting device A mixed phase import 5; Extraction plant mixing tank A10 is provided with extraction plant mixing tank A continuous phase fluid inlet 12, extraction plant mixing tank A dispersed phase fluid inlet 13 and extraction plant mixing tank A mixed phase fluid outlet 14, extraction plant phase splitting device B11 is provided with extraction plant phase splitting device B mixed phase import 15, extraction plant phase splitting device B light phase export 16 and extraction plant phase splitting device B heavy out 17, and extraction plant mixing tank A continuous phase fluid outlet 14 is connected with extraction plant phase splitting device B mixed phase import 15; Extraction plant phase splitting device A light phase export 7 is connected with extraction plant mixing tank A continuous phase fluid inlet 12 by the pipeline that is provided with pump, and extraction plant phase splitting device B heavy out 17 is connected with extraction plant phosphoric acid import 8 by the pipeline that is provided with pump;

Washing device comprises washing device mixing tank 35 and washing device phase splitting device 36, washing device secondary mixing tank 43 and washing device secondary phase splitting device 44, washing device mixing tank 35 is provided with washing device continuous phase fluid inlet 37, washing device dispersed phase fluid inlet 38 and washing device mixed phase fluid outlet 39, washing device phase splitting device 36 is provided with washing device mixed phase import 40, washing device heavy out 42 and washing device light phase export 41, and washing device mixed phase fluid outlet 39 is connected with washing device mixed phase import 40; Washing device secondary mixing tank 43 is provided with washing device secondary continuous phase fluid inlet 45, washing device secondary dispersed phase fluid inlet 46 and washing device secondary mixed phase fluid outlet 47, washing device secondary phase splitting device 44 is provided with washing device secondary mixed phase import 48, washing device secondary heavy out 50 and washing device secondary light phase export 49, and washing device secondary mixed phase fluid outlet 47 is connected with washing device secondary mixed phase import 48; Washing device light phase export 41 is connected with washing device secondary continuous phase fluid inlet 45 by pipeline, washing device secondary heavy out 50 is connected with washing device dispersed phase fluid inlet 38, and washing device secondary light phase export 49 is connected with back extraction device continuous phase fluid inlet 61;

Back extraction device comprises back extraction device mixing tank 59 and back extraction device phase splitting device 60, back extraction device secondary mixing tank 67 and back extraction device secondary phase splitting device 68, back extraction device mixing tank 59 is provided with back extraction device continuous phase fluid inlet 61, back extraction device connects dispersed phase fluid inlet 62 and back extraction device mixed phase fluid outlet 63, back extraction device phase splitting device 60 is provided with back extraction device mixed phase import 64, back extraction device heavy out 66 and back extraction device light phase export 65, and back extraction device mixed phase fluid outlet 63 is connected with back extraction device mixed phase import 64; Back extraction device secondary mixing tank 67 is provided with back extraction device secondary continuous phase fluid 69 back extraction devices that enter the mouth and connects secondary dispersed phase fluid inlet 70 and back extraction device secondary mixed phase fluid outlet 71, back extraction device secondary phase splitting device 68 is provided with back extraction device secondary mixed phase import 72, back extraction device secondary heavy out 74 and back extraction device secondary light phase export 73, and back extraction device secondary mixed phase fluid outlet 71 is connected with back extraction device secondary mixed phase import 72; Back extraction device light phase export 65 is connected with back extraction device secondary continuous phase fluid inlet 69, back extraction device secondary heavy out 74 connects dispersed phase fluid inlet 62 by pipeline and back extraction device and is connected, and back extraction device secondary light phase export 73 is connected with extraction plant solvent inlet 9.

During use: at extraction plant, the phosphoric acid that comes out from extraction plant phase splitting device B heavy out 17 all enters extraction plant mulser A1 by extraction plant mulser import 3 from extraction plant phosphoric acid import 8, extraction agent (from the no-load solvent of back extraction device secondary light phase export 73) from extraction plant solvent inlet 9 under the effect of pump, extraction agent and phosphoric acid are finished the efficient mass transfer process in extraction plant mulser A1, the mixed phase that forms comes out from extraction plant mulser A1 outlet 4, enters extraction plant phase splitting device A2 by extraction plant mixed phase import 5.In extraction plant phase splitting device A2, realize the layering of mixed phase, light, the heavy two-phase of formation.Impurity in the phosphoric acid enters heavy phase becomes raffinate from 6 discharges of extraction plant heavy out, phosphoric acid is extracted agent extraction to be become loaded solvent and comes out from extraction plant light phase export 7, enters extraction plant mixing tank A10 through extraction plant mixing tank A continuous phase fluid inlet 12 under the effect of pump; Feed phosphoric acid (fresh phosphoric) enters extraction plant mixing tank A10 through extraction plant mixing tank A dispersed phase fluid inlet 13, efficient mass transfer effect by extraction plant mixing tank A10, further improve the phosphoric acid extraction rate, the mixed phase that forms comes out from extraction plant mixing tank A mixed phase fluid outlet 14, enter extraction plant phase splitting device B11 by extraction plant phase splitting device B mixed phase import 15, in extraction plant phase splitting device B11, realize the layering of mixed phase, what form is light, heavy two-phase, most of phosphoric acid is extracted the agent extraction and enters and gently form loaded solvent mutually and enter washing device from extraction plant phase splitting device B light phase export 16, heavy phase is then returned extraction plant mulser A1 by extraction plant phase splitting device B heavy out 17, thereby realizes extracting and separating.

At washing device, the phosphoric acid that washing device secondary secondary heavy out 50 comes out, the loaded solvent that return washing device dispersed phase fluid inlet 38 under the effect of pump, comes from extraction plant enters washing device mixing tank 35 from washing device continuous phase fluid inlet 37, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device mixing tank 35, the mixed phase that forms comes out from washing device mixed phase fluid outlet 39, enters washing device phase splitting device 36 by washing device phase splitting device mixed phase import 40.In washing device phase splitting device 36, realize the layering of mixed phase, light, the heavy two-phase of formation.Impurity in the loaded solvent enters heavy phase to be become and washes spent acid and discharge from washing device heavy out 42, be washed the loaded solvent that has purified and come out, under the effect of pump, enter washing device secondary mixing tank 43 through washing device secondary continuous phase fluid inlet 45 from washing device light phase export 41.Washing acid (purifying phosphoric acid) enters washing device secondary mixing tank 43 through washing device secondary dispersed phase fluid inlet 46, efficient mass transfer effect by washing device secondary mixing tank 43, further improve the molten washing effect of load, the mixed phase that forms comes out from washing device secondary mixed phase fluid outlet 47, enter washing device secondary phase splitting device 44 by washing device secondary phase splitting device mixed phase import 48, in washing device secondary phase splitting device 44, 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 49, impurity in the loaded solvent enters heavy phase and returns washing device mixing tank 35 by washing device secondary heavy out 50, thereby realizes washing, purifying.

At back extraction device, the phosphoric acid that back extraction device back extraction device secondary heavy out 74 comes out, under the effect of pump, return back extraction device back extraction device dispersed phase fluid inlet 62, the loaded solvent that comes from washing device enters back extraction device mixing tank 59 from back extraction device continuous phase fluid inlet 61, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mixing tank 59, the mixed phase that forms comes out from back extraction device mixed phase fluid outlet 63, enter back extraction device phase splitting device 60. is realized mixed phase in back extraction device phase splitting device 60 layering by back extraction device mixed phase import 64, what form is light, heavy two-phase. the phosphoric acid in the loaded solvent enters heavy phase becomes purifying phosphoric acid from 66 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 65, under the effect of pump, enter back extraction device secondary mixing tank 67. de-salted waters and enter back extraction device secondary mixing tank 67 through back extraction device secondary dispersed phase fluid inlet 70 through back extraction device secondary continuous phase fluid inlet 69, efficient mass transfer effect by back extraction device secondary mixing tank 67, 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 71, enter back extraction device secondary phase splitting device 68 by back extraction device secondary phase splitting device mixed phase import 72, in back extraction device secondary phase splitting device 68, 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 73, and the phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device mixing tank 59. by back extraction device heavy out 74

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 mulser B18 and extraction plant phase splitting device C19, extraction plant mulser B18 is provided with extraction plant mulser B import 20 and extraction plant mulser B outlet 21, extraction plant phase splitting device C19 is provided with extraction plant phase splitting device C mixed phase import 22, extraction plant phase splitting device C heavy out 23 and extraction plant phase splitting device C light phase export 24, three grades of phosphoric acid imports 25 of extraction plant mulser B import 20 and extraction plant and three grades of solvent inlets 26 of extraction plant are connected, and extraction plant mulser B outlet 21 is connected with phase splitting device C mixed phase import 22; Phase splitting device B light phase export 16 is connected with three grades of solvent inlets 26, and phase splitting device C heavy out 23 is connected with mixing tank A dispersed phase fluid inlet 13 by pipeline, and phase splitting device C light phase export 24 is connected with washing device continuous phase fluid inlet 37;

Washing device comprises three grades of mixing tanks 51 of washing device and three grades of phase-splitting equipment 52 of washing device, three grades of mixing tanks 51 of washing device are provided with three grades of continuous phase fluid inlets 53 of washing device, washing device disperses phase fluid inlet 54 and three grades of mixed phase fluid outlets 55 of washing device for three grades, three grades of phase-splitting equipment 52 of washing device are provided with three grades of mixed phase imports 56 of washing device, three grades of heavy outs 57 of washing device and three grades of light phase exports 58 of washing device, and three grades of mixed phase fluid of washing device outlet 55 is connected with three grades of mixed phase imports 56 of washing device; Three grades of continuous phase fluid inlets 53 of washing device secondary light phase export 49 and washing device are connected, three grades of heavy outs 58 of washing device are connected with washing device secondary dispersed phase fluid inlet 46, and three grades of light phase exports 57 of washing device are connected with back extraction device continuous phase fluid inlet 61;

Back extraction device comprises three grades of mixing tanks 75 of back extraction device and three grades of phase-splitting equipment 76 of back extraction device, three grades of mixing tanks 75 of back extraction device are provided with back extraction device three grades of continuous phase fluid inlets 77, back extraction devices and connect three grades of dispersion phase fluid inlets 78 and three grades of mixed phase fluid outlets 79 of back extraction device, three grades of phase-splitting equipment 76 of back extraction device are provided with three grades of mixed phase imports 80 of back extraction device, three grades of heavy outs 82 of back extraction device and three grades of light phase exports 81 of back extraction device, and three grades of mixed phase fluid of back extraction device outlet 79 is connected with three grades of mixed phase imports 80 of back extraction device; Three grades of continuous phase fluid inlets 77 of back extraction device secondary light phase export 73 and back extraction device are connected, three grades of heavy outs 82 of back extraction device are connected with back extraction device secondary dispersed phase fluid inlet 70, and three grades of light phase exports 81 of back extraction device are connected with extraction plant solvent inlet 9.All the other are with embodiment 1.

During use, at extraction plant, the phosphoric acid that extraction plant phase splitting device C heavy out 23 comes out returns extraction plant mixing tank A10 under the effect of pump; Loaded solvent from extraction plant phase splitting device B light phase export 16 come out, under the effect of pump through three grades of solvent inlets 26 of extraction plant, feed phosphoric acid (fresh phosphoric) enters extraction plant mulser B18 through three grades of phosphoric acid imports 25 of extraction plant by extraction plant mulser B import 20; The mixed phase that forms comes out from extraction plant mulser B outlet 21, enter extraction plant phase splitting device C19 by extraction plant phase splitting device C mixed phase import 22, in extraction plant phase splitting device C19, realize the layering of mixed phase, light, the heavy two-phase that forms, most of phosphoric acid are extracted the agent extraction and enter and gently form loaded solvent mutually and come out to enter refining plant from extraction plant phase splitting device C light phase export 24; Heavy phase is then returned extraction plant mixing tank A10 by extraction plant phase splitting device C heavy out 23, with of the efficient mass transfer effect of extraction plant mixing tank A continuous phase fluid inlet 12 loaded solvents that enter by extraction plant mixing tank A10, the mixed phase that forms comes out from extraction plant mixing tank A mixed phase fluid outlet 14, enter phase splitting device B11 by extraction plant phase splitting device B mixed phase import 15, in extraction plant phase splitting device B11, realize the layering of mixed phase, what form is light, heavy two-phase, most of phosphoric acid is extracted the agent extraction and enters and gently form loaded solvent mutually and enter extraction plant mulser B18 from extraction plant phase splitting device B light phase export 16, heavy phase is then returned extraction plant mulser A1 by extraction plant phase splitting device B heavy out 17, under the effect of pump from phosphoric acid import 8, extraction agent (from the no-load solvent of three grades of light phase exports 81 of back extraction device) all enters mulser A1 by extraction plant mulser import 3 from solvent inlet 9, extraction agent and phosphoric acid are finished the efficient mass transfer process in extraction plant mulser A1, the mixed phase that forms comes out from extraction plant mulser outlet 4, enter extraction plant phase splitting device 2. is realized mixed phase in extraction plant phase splitting device 2 layering by extraction plant mixed phase import 5, what form is light, heavy two-phase. the impurity in the phosphoric acid enters heavy phase to be become raffinate and discharges from extraction plant heavy out 6. and phosphoric acid is extracted the agent extraction to be become loaded solvent and comes out from extraction plant light phase export 7, enters extraction plant mixing tank A10. through extraction plant mixing tank A continuous phase fluid inlet 12 under the effect of pump

At washing device, the phosphoric acid that washing device washing device secondary heavy out 50 comes out, under the effect of pump, return washing device dispersed phase fluid inlet 38, enter washing device mixing tank 35 from washing device continuous phase fluid inlet 37 from the loaded solvent of extraction plant, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device mixing tank 35, the mixed phase that forms comes out from washing device mixed phase fluid outlet 39, enters washing device phase splitting device 36 by washing device phase splitting device mixed phase import 40.In washing device phase splitting device 36, realize the layering of mixed phase, light, the heavy two-phase of formation.Impurity in the loaded solvent enters heavy phase to be become and washes spent acid and discharge from washing device heavy out 42, be washed the loaded solvent that has purified and come out, under the effect of pump, enter washing device secondary mixing tank 43 through washing device secondary continuous phase fluid inlet 45 from washing device light phase export 41.The phosphoric acid that comes out from three grades of heavy outs 58 of washing device returns washing device secondary dispersed phase fluid inlet 46, effect of mass transmitting by washing device secondary mixing tank 43, the mixed phase that forms comes out from washing device secondary mixed phase fluid outlet 47, enter washing device secondary phase splitting device 44 by washing device secondary phase splitting device mixed phase import 48, in washing device secondary phase splitting device 44, realize the layering of mixed phase, what form is light, heavy two-phase, loaded solvent comes out from washing device secondary light phase export 49, enters three grades of mixing tanks 51 of washing device through three grades of continuous phase fluid inlets 53 of washing device under the effect of pump.Washing acid (purifying phosphoric acid) disperses phase fluid inlet 54 to enter three grades of mixing tanks 51 of washing device through three grades of washing devices, and the efficient mass transfer effect by multistage washing device mixing tank has improved the phosphoric acid washing effect as much as possible; The mixed phase that forms comes out from three grades of mixed phase fluid outlets 55 of washing device, enter three grades of phase-splitting equipment 52 of washing device by three grades of phase-splitting equipment of washing device mixed phase import 56, in three grades of phase-splitting equipment 52 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 the back extraction device preface from three grades of light phase exports of washing device 57, the impurity in the loaded solvent enters heavy phase and returns washing device secondary mixing tank 43 by three grades of heavy outs 58 of washing device.By three grades of washings, the impurity major part in the loaded solvent is entered heavy phase by phosphoric acid washing and finally discharges from washing device phase splitting device heavy phase mouth, thereby realizes washing, purifying.

At back extraction device, the phosphoric acid that back extraction device back extraction device secondary heavy out 74 comes out, under the effect of pump, return back extraction device back extraction device dispersed phase fluid inlet 62, the loaded solvent that comes from washing device enters back extraction device mixing tank 59 from back extraction device continuous phase fluid inlet 61, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mixing tank 59, the mixed phase that forms comes out from back extraction device mixed phase fluid outlet 63, enter back extraction device phase splitting device 60. is realized mixed phase in back extraction device phase splitting device 60 layering by back extraction device mixed phase import 64, what form is light, heavy two-phase. the phosphoric acid in the loaded solvent enters heavy phase becomes purifying phosphoric acid from 66 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 65, under the effect of pump, enter the phosphoric acid that three grades of heavy outs 82 of back extraction device secondary mixing tank 67. back extraction devices come out through back extraction device secondary continuous phase fluid inlet 69, under the effect of pump, return back extraction device secondary mixing tank 67, efficient mass transfer effect by back extraction device secondary mixing tank 67, the mixed phase that forms comes out from back extraction device secondary mixed phase fluid outlet 71, enter back extraction device secondary phase splitting device 68 by back extraction device secondary phase splitting device mixed phase import 72, in back extraction device secondary phase splitting device 68, 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 59. also contains part phosphoric acid by back extraction device heavy out 74 and come out from back extraction device secondary light phase export 73, under the effect of pump, enter the mouth 77 through three grades of continuous phase fluids of back extraction device, de-salted water disperses phase fluid inlet 78 to enter three grades of mixing tanks 75 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 79 of back extraction device, enter three grades of phase-splitting equipment 76 of back extraction device by three grades of phase-splitting equipment of back extraction device mixed phase import 80, in three grades of phase-splitting equipment 76 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 81, phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device secondary mixing tank 67. by three grades of back extractions by three grades of heavy outs 82 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.

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 mixing tank B27 and extraction plant phase splitting device D28, extraction plant mixing tank B27 is provided with extraction plant mixing tank B continuous phase fluid inlet 29, extraction plant mixing tank B dispersed phase fluid inlet 30 and extraction plant mixing tank B mixed phase fluid outlet 31, extraction plant phase splitting device D28 is provided with extraction plant phase splitting device D mixed phase import 32, extraction plant phase splitting device D light phase export 33 and extraction plant phase splitting device D heavy out 34, extraction plant mixing tank B mixed phase fluid outlet 31 is advanced 32 with extraction plant phase splitting device D mixed phase and is connected; Extraction plant phase splitting device B light phase export 16 is connected with extraction plant mixing tank B continuous phase fluid inlet 29, extraction plant phase splitting device D heavy out 34 is connected with extraction plant mixing tank A dispersed phase fluid inlet 13 by the pipeline that is provided with pump, and extraction plant phase splitting device D light phase export 33 is connected with washing device continuous phase fluid inlet 37;

Washing device comprises three grades of mixing tanks 51 of washing device and three grades of phase-splitting equipment 52 of washing device, three grades of mixing tanks 51 of washing device are provided with three grades of continuous phase fluid inlets 53 of washing device, washing device disperses phase fluid inlet 54 and three grades of mixed phase fluid outlets 55 of washing device for three grades, three grades of phase-splitting equipment 52 of washing device are provided with three grades of mixed phase imports 56 of washing device, three grades of heavy outs 58 of washing device and three grades of light phase exports 57 of washing device, and three grades of mixed phase fluid of washing device outlet 55 is connected with three grades of mixed phase imports 56 of washing device; Three grades of continuous phase fluid inlets 53 of washing device secondary light phase export 49 and washing device are connected, three grades of heavy outs 58 of washing device are connected with washing device secondary dispersed phase fluid inlet 46, and three grades of light phase exports 57 of washing device are connected with back extraction device continuous phase fluid inlet 61;

Back extraction device comprises three grades of mixing tanks 75 of back extraction device and three grades of phase-splitting equipment 76 of back extraction device, three grades of mixing tanks 75 of back extraction device are provided with three grades of continuous phase fluids of back extraction device, 77 back extraction devices that enter the mouth and connect three grades and disperse phase fluids inlet 78 and three grades of mixed phase fluid outlets 79 of back extraction device, three grades of phase-splitting equipment 76 of back extraction device are provided with three grades of mixed phase imports 80 of back extraction device, three grades of heavy outs 82 of back extraction device and three grades of light phase exports 81 of back extraction device, and three grades of mixed phase fluid of back extraction device outlet 79 is connected with three grades of mixed phase imports 80 of back extraction device; Three grades of continuous phase fluid inlets 77 of back extraction device secondary light phase export 73 and back extraction device are connected, three grades of heavy outs 82 of back extraction device are connected with back extraction device secondary dispersed phase fluid inlet 70, and three grades of light phase exports 81 of back extraction device are connected with extraction plant solvent inlet 9. 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 16, enter extraction plant mixing tank B27 through extraction plant mixing tank B continuous phase fluid inlet 29 under the effect of pump, feed phosphoric acid (fresh phosphoric) enters mixing tank B27 through extraction plant mixing tank B dispersed phase fluid inlet 30; The mixed phase that forms comes out from extraction plant mixing tank B mixed phase fluid outlet 31, enter phase splitting device D28 by extraction plant phase splitting device D mixed phase import 32, in phase splitting device D28, realize the layering of mixed phase, light, the heavy two-phase that forms, most of phosphoric acid are extracted the agent extraction and enter and gently form loaded solvent mutually and come out to enter washing device from extraction plant phase splitting device D light phase export 33; Heavy phase is then come out by extraction plant phase splitting device D heavy out 34, returns extraction plant mixing tank A10 by mixing tank A dispersed phase fluid inlet 13 under the effect of pump; Loaded solvent comes out from the light phase export 7 of extraction plant phase splitting device A2, under the effect of pump, enter extraction plant mixing tank A10 through extraction plant mixing tank A continuous phase fluid inlet 12, efficient mass transfer effect by extraction plant mixing tank A10, the mixed phase that forms comes out from extraction plant mixing tank A continuous phase fluid outlet 14, enter extraction plant phase splitting device B11 by extraction plant phase splitting device B mixed phase import 15, in extraction plant phase splitting device B11, realize the layering of mixed phase, what form is light, heavy two-phase, phosphoric acid is extracted agent extraction and enters and gently form loaded solvent mutually and enter extraction plant mixing tank B27 from extraction plant phase splitting device B light phase export 16, heavy phase then by extraction plant phase splitting device B heavy out 17 under the effect of pump from extraction plant phosphoric acid import 8, extraction agent all enters extraction plant mulser A1 by extraction plant mulser import 3 from extraction plant solvent inlet 9, extraction agent and phosphoric acid are finished the efficient mass transfer process in mulser A1, the extraction plant mixed phase that forms comes out from extraction plant mulser A outlet 4, enters extraction plant phase splitting device A2 by extraction plant mixed phase import 5.In extraction plant phase splitting device A2, realize the layering of mixed phase, light, the heavy two-phase of formation.Impurity in the phosphoric acid enters heavy phase to be become raffinate and discharges from extraction plant heavy out 6, and phosphoric acid is extracted the agent extraction to be become loaded solvent and come out to enter extraction plant mixing tank A10 from extraction plant light phase export 7.

At washing device, with embodiment 2.

At back extraction device, with embodiment 2.

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 (3)

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 (16) is connected with washing device continuous phase fluid inlet (37), washing device secondary light phase export (49) is connected with back extraction device continuous phase fluid inlet (61), and back extraction device secondary light phase export (73) is connected with extraction plant solvent inlet (9);

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

Washing device comprises washing device mixing tank (35) and washing device phase splitting device (36), washing device secondary mixing tank (43) and washing device secondary phase splitting device (44), washing device mixing tank (35) is provided with washing device continuous phase fluid inlet (37), washing device dispersed phase fluid inlet (38) and washing device mixed phase fluid outlet (39), washing device phase splitting device (36) is provided with washing device mixed phase import (40), washing device heavy out (42) and washing device light phase export (41), washing device mixed phase fluid outlet (39) is connected with washing device mixed phase import (40); Washing device secondary mixing tank (43) is provided with washing device secondary continuous phase fluid inlet (45), washing device secondary dispersed phase fluid inlet (46) and washing device secondary mixed phase fluid outlet (47), washing device secondary phase splitting device (44) is provided with washing device secondary mixed phase import (48), washing device secondary heavy out (50) and washing device secondary light phase export (49), and washing device secondary mixed phase fluid outlet (47) is connected with washing device secondary mixed phase import (48); Washing device light phase export (41) is connected with washing device secondary continuous phase fluid inlet (45) by pipeline, washing device secondary heavy out (50) is connected with washing device dispersed phase fluid inlet (38), and washing device secondary light phase export (49) is connected with back extraction device continuous phase fluid inlet (61);

Back extraction device comprises back extraction device mixing tank (59) and back extraction device phase splitting device (60), back extraction device secondary mixing tank (67) and back extraction device secondary phase splitting device (68), back extraction device mixing tank (59) is provided with back extraction device continuous phase fluid inlet (61), back extraction device connects dispersed phase fluid inlet (62) and back extraction device mixed phase fluid outlet (63), back extraction device phase splitting device (60) is provided with back extraction device mixed phase import (64), back extraction device heavy out (66) and back extraction device light phase export (65), back extraction device mixed phase fluid outlet (63) is connected with back extraction device mixed phase import (64); Back extraction device secondary mixing tank (67) is provided with back extraction device secondary continuous phase fluid inlet (69) back extraction device and connects secondary dispersed phase fluid inlet (70) and back extraction device secondary mixed phase fluid outlet (71), back extraction device secondary phase splitting device (68) is provided with back extraction device secondary mixed phase import (72), back extraction device secondary heavy out (74) and back extraction device secondary light phase export (73), and back extraction device secondary mixed phase fluid outlet (71) is connected with back extraction device secondary mixed phase import (72); Back extraction device light phase export (65) is connected with back extraction device secondary continuous phase fluid inlet (69), back extraction device secondary heavy out (74) connects dispersed phase fluid inlet (62) by pipeline and back extraction device and is connected, and back extraction device secondary light phase export (73) is connected with extraction plant solvent inlet (9).

2. phosphoric acid purification device as claimed in claim 1, it is characterized in that: extraction plant comprises extraction plant mulser B (18) and extraction plant phase splitting device C (19), extraction plant mulser B (18) is provided with extraction plant mulser B import (20) and extraction plant mulser B outlet (21), extraction plant phase splitting device C (19) is provided with extraction plant phase splitting device C mixed phase import (22), extraction plant phase splitting device C heavy out (23) and extraction plant phase splitting device C light phase export (24), extraction plant mulser B import (20) is connected with three grades of phosphoric acid imports of extraction plant (25) and three grades of solvent inlets of extraction plant (26), and extraction plant mulser B outlet (21) is connected with phase splitting device C mixed phase import (22); Phase splitting device B light phase export (16) is connected with three grades of solvent inlets (26), phase splitting device C heavy out (23) is connected with mixing tank A dispersed phase fluid inlet (13) by pipeline, and phase splitting device C light phase export (24) is connected with washing device continuous phase fluid inlet (37);

Washing device comprises three grades of mixing tanks of washing device (51) and three grades of phase-splitting equipment of washing device (52), three grades of mixing tanks of washing device (51) are provided with three grades of continuous phase fluid inlets of washing device (53), washing device disperses phase fluid inlet (54) and three grades of mixed phase fluid outlets of washing device (55) for three grades, three grades of phase-splitting equipment of washing device (52) are provided with three grades of mixed phase imports of washing device (56), three grades of light phase exports of three grades of heavy outs of washing device (57) and washing device (58), three grades of mixed phase fluid outlets of washing device (55) are connected with three grades of mixed phase imports of washing device (56); Washing device secondary light phase export (49) is connected with three grades of continuous phase fluid inlets of washing device (53), three grades of heavy outs of washing device (58) are connected with washing device secondary dispersed phase fluid inlet (46), and three grades of light phase exports of washing device (57) are connected with back extraction device continuous phase fluid inlet (61);

Back extraction device comprises three grades of mixing tanks of back extraction device (75) and three grades of phase-splitting equipment of back extraction device (76), three grades of mixing tanks of back extraction device (75) are provided with three grades of continuous phase fluid inlets of back extraction device (77), back extraction device connects three grades and disperses phase fluid inlet (78) and three grades of mixed phase fluid outlets of back extraction device (79), three grades of phase-splitting equipment of back extraction device (76) are provided with three grades of mixed phase imports of back extraction device (80), three grades of light phase exports of three grades of heavy outs of back extraction device (82) and back extraction device (81), three grades of mixed phase fluid outlets of back extraction device (79) are connected with three grades of mixed phase imports of back extraction device (80); Back extraction device secondary light phase export (73) is connected with three grades of continuous phase fluid inlets of back extraction device (77), three grades of heavy outs of back extraction device (82) are connected with back extraction device secondary dispersed phase fluid inlet (70), and three grades of light phase exports of back extraction device (81) are connected with extraction plant solvent inlet (9).

3. phosphoric acid purification device as claimed in claim 1, it is characterized in that: extraction plant comprises extraction plant mixing tank B (27) and extraction plant phase splitting device D (28), extraction plant mixing tank B (27) is provided with extraction plant mixing tank B continuous phase fluid inlet (29), extraction plant mixing tank B dispersed phase fluid inlet (30) and extraction plant mixing tank B mixed phase fluid outlet (31), extraction plant phase splitting device D (28) is provided with extraction plant phase splitting device D mixed phase import (32), extraction plant phase splitting device D light phase export (33) and extraction plant phase splitting device D heavy out (34), extraction plant mixing tank B mixed phase fluid outlet (31) is connected with extraction plant phase splitting device D mixed phase import (32); Extraction plant phase splitting device B light phase export (16) is connected with extraction plant mixing tank B continuous phase fluid inlet (29), extraction plant phase splitting device D heavy out (34) is connected with extraction plant mixing tank A dispersed phase fluid inlet (13) by the pipeline that is provided with pump, and extraction plant phase splitting device D light phase export (33) is connected with washing device continuous phase fluid inlet (37);

Washing device comprises three grades of mixing tanks of washing device (51) and three grades of phase-splitting equipment of washing device (52), three grades of mixing tanks of washing device (51) are provided with three grades of continuous phase fluid inlets of washing device (53), washing device disperses phase fluid inlet (54) and three grades of mixed phase fluid outlets of washing device (55) for three grades, three grades of phase-splitting equipment of washing device (52) are provided with three grades of mixed phase imports of washing device (56), three grades of light phase exports of three grades of heavy outs of washing device (58) and washing device (57), three grades of mixed phase fluid outlets of washing device (55) are connected with three grades of mixed phase imports of washing device (56); Washing device secondary light phase export (49) is connected with three grades of continuous phase fluid inlets of washing device (53), three grades of heavy outs of washing device (58) are connected with washing device secondary dispersed phase fluid inlet (46), and three grades of light phase exports of washing device (57) are connected with back extraction device continuous phase fluid inlet (61);

Back extraction device comprises three grades of mixing tanks of back extraction device (75) and three grades of phase-splitting equipment of back extraction device (76), three grades of mixing tanks of back extraction device (75) are provided with three grades of continuous phase fluid inlet (77) back extraction devices of back extraction device and connect three grades of dispersion phase fluid inlets (78) and three grades of mixed phase fluid outlets of back extraction device (79), three grades of phase-splitting equipment of back extraction device (76) are provided with three grades of mixed phase imports of back extraction device (80), three grades of light phase exports of three grades of heavy outs of back extraction device (82) and back extraction device (81), three grades of mixed phase fluid outlets of back extraction device (79) are connected with three grades of mixed phase imports of back extraction device (80); Back extraction device secondary light phase export (73) is connected with three grades of continuous phase fluid inlets of back extraction device (77), three grades of heavy outs of back extraction device (82) are connected with back extraction device secondary dispersed phase fluid inlet (70), and three grades of light phase exports of back extraction device (81) are connected with extraction plant solvent inlet (9).

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