CN201458736U

CN201458736U - Device for purifying phosphoric acid

Info

Publication number: CN201458736U
Application number: CN2009201256240U
Authority: CN
Inventors: 王邵东; 李红林; 王权顶; 吕阳成
Original assignee: Wengfu Group Co Ltd
Current assignee: Wengfu Group Co Ltd
Priority date: 2009-08-11
Filing date: 2009-08-11
Publication date: 2010-05-12
Anticipated expiration: 2019-08-11

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 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), the back extraction plant comprises two sets of emulsifying machines and phase separation plants to from two stages, or comprises more sets of emulsifying machines and phase separation plants to form multiple stages. 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 primary solvent inlet of the cleaning plant is connected with a light-phase outlet of the final phase separation plant of the extraction plant, and a primary solvent 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, and reduce equipment investment and running expense.

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.

Chinese patent publication number CN1736577A, disclosed on 02 22nd, 2006 " a kind of multi-channeled micro-structured reactor ", continuous phase fluid enters reactor from the inlet tube distribution chamber in this reactor, dispersed phase fluid is passed dispersion medium and is entered the external phase parallel channels, under continuous phase fluid flows shear action, be dispersed into fine droplet or bubble, contact, realize short mix and reaction between two-phase fluid with continuous phase fluid.

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

Summary of the invention

The purpose of this utility model be to overcome above-mentioned shortcoming and provide a kind of can the reinforcing mass transfer performance, improve purification efficiency, reduce 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 the washing device solvent inlet, washing device phase splitting device B light phase export is connected with back extraction device one-level solvent 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, extraction plant 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 mulser A and washing device phase splitting device A, washing device mixing tank A and washing device phase splitting device B, washing device mulser A is provided with washing device mulser A import, washing device mulser A outlet, washing device phase splitting device A is provided with the import of washing device mixed phase, washing device heavy out and washing device light phase export, washing device mulser A import is connected with the washing device solvent inlet with the import of washing device phosphoric acid, and washing device mulser A outlet is connected with the import of washing device mixed phase; 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 B is provided with the import of washing device phase splitting device B mixed phase, washing device phase splitting device B light phase export and washing device phase splitting device B heavy out, and the outlet of washing device mixing tank A mixed phase fluid is connected with the import of washing device phase splitting device B mixed phase; The washing device light phase export is connected with washing device mixing tank A continuous phase fluid inlet by the pipeline that is provided with pump, and washing device phase splitting device B heavy out is connected with the import of washing device phosphoric acid by the pipeline that is provided with pump.

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

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

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

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

Above-mentioned phosphoric acid purification device, wherein: extraction plant comprises extraction plant mixing tank B and extraction plant phase splitting device D, 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 by the pipeline that is provided with pump, 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 the washing device solvent inlet;

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

The utility model compared with prior art, as can be known from the above technical solutions, according to purify requiring different extraction plant, the washing devices that constitute phosphoric acid purification devices to select the combination of one group of mulser and phase splitting device and one group of mixing tank and phase splitting device for use, or on aforesaid combination, increase the multistage of one or more groups mulser and phase splitting device (or mixing tank and phase splitting device) formation; The secondary that back extraction device selects for use two groups of mulsers and phase splitting device to constitute, or by many groups mulser and phase splitting device combine multistage. in phosphoric acid purification device, feed phosphoric acid (fresh phosphoric), washing acid (purifying phosphoric acid), de-salted water is all added by final stage mass transfer apparatus respective inlets, the no-load solvent of extraction plant one-level solvent inlet is from back extraction device final stage light phase export, the loaded solvent of washing device one-level solvent inlet is from extraction plant final stage light phase export, the loaded solvent of back extraction device one-level solvent inlet is from washing device final stage light phase export. and mulser and mixing tank mass transfer area are big, the mass-transfer efficiency height. the mixed solution that comes out from mulser and mixing tank is easy to phase-splitting, guarantees to divide a phase effect; The purifying phosphoric acid foreign matter content 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; Occupation area of equipment is little, and appliance arrangement is arranged simple, and factory building can be realized miniaturization; The single device cost is low, can save facility investment.

Description of drawings

Fig. 1 is embodiment 1 structural representation;

Fig. 2 is embodiment 2 structural representations;

Fig. 3 is embodiment 3 structural representations.

Mark among the figure:

1, extraction plant one-level mulser A, 2, extraction plant phase splitting device A, 3, extraction plant mulser A import, 4, extraction plant mulser A outlet, 5, the import of extraction plant mixed phase, 6, the extraction plant heavy out, 7, the extraction plant light phase export, 8, the import of extraction plant phosphoric acid, 9, the extraction plant solvent inlet, 10, extraction plant mixing tank A, 11, extraction plant phase splitting device B, 12, extraction plant mixing tank A continuous phase fluid inlet, 13, extraction plant mixing tank A dispersed phase fluid inlet, 14, the outlet of extraction plant mixing tank A mixed phase fluid, 15, the import of extraction plant phase splitting device B mixed phase, 16, extraction plant phase splitting device B light phase export, 17, extraction plant phase splitting device B heavy out, 18, extraction plant mulser B, 19, extraction plant phase splitting device C, 20, extraction plant mulser B import, 21, extraction plant mulser B outlet, 22, the import of extraction plant phase splitting device C mixed phase, 23, extraction plant phase splitting device C heavy out, 24, extraction plant phase splitting device C light phase export, 25, three grades of phosphoric acid imports of extraction plant, 26, three grades of solvent inlets of extraction plant, 27, extraction plant mixing tank B, 28, extraction plant phase splitting device D, 29, extraction plant mixing tank B continuous phase fluid inlet, 30, extraction plant mixing tank B dispersed phase fluid inlet, 31, the outlet of extraction plant mixing tank B mixed phase fluid, 32, the import of extraction plant phase splitting device D mixed phase, 33, extraction plant phase splitting device D light phase export, 34, extraction plant phase splitting device D heavy out, 35, washing device mulser A, 36, washing device phase splitting device A, 37, washing device mulser A import, 38, washing device mulser A outlet, 39, the import of washing device mixed phase, 40, the washing device heavy out, 41, the washing device light phase export, 42, the import of washing device phosphoric acid, 43, the washing device solvent inlet, 44, washing device mixing tank A, 45, washing device phase splitting device B, 46, washing device mixing tank A continuous phase fluid inlet, 47, washing device mixing tank A dispersed phase fluid inlet, 48, the outlet of washing device mixing tank A mixed phase fluid, 49, the import of washing device phase splitting device B mixed phase, 50, washing device phase splitting device B light phase export, 51, washing device phase splitting device B heavy out, 52, washing device mulser B, 53, washing device phase splitting device C, 54, washing device mulser B import, 55, washing device mulser B outlet, 56, the import of washing device phase splitting device C mixed phase, 57, washing device phase splitting device C heavy out, 58, washing device phase splitting device C light phase export, 59, three grades of phosphoric acid imports of washing device, 60, three grades of solvent inlets of washing device, 61, washing device mixing tank B, 62, washing device phase splitting device D, 63, washing device mixing tank B continuous phase fluid inlet, 64, washing device mixing tank B dispersed phase fluid inlet, 65, the outlet of washing device mixing tank B mixed phase fluid, 66, the import of washing device phase splitting device D mixed phase, 67, washing device phase splitting device D light phase export, 68, washing device phase splitting device D heavy out, 69, back extraction device one-level mulser, 70, back extraction device one-level phase splitting device, 71, the import of back extraction device one-level mulser, 72, the outlet of back extraction device one-level mulser, 73, the import of back extraction device one-level mixed phase, 74, back extraction device one-level heavy out, 75, back extraction device one-level light phase export, 76, the import of back extraction device one-level reverse-extraction agent, 77, back extraction device one-level solvent inlet, 78, back extraction device secondary mulser, 79, back extraction device secondary phase splitting device, 80, the import of back extraction device secondary mulser, 81, the outlet of back extraction device secondary mulser, 82, the import of back extraction device secondary mixed phase, 83, back extraction device secondary heavy out, 84, back extraction device secondary light phase export, 85, the import of back extraction device secondary reverse-extraction agent, 86, the import of back extraction device secondary solvent, 87, three grades of mulsers of back extraction device, 88, three grades of phase-splitting equipment of back extraction device, 89, three grades of mulser imports of back extraction device, 90, three grades of mulser outlets of back extraction device, 91, three grades of mixed phase imports of back extraction device, 92, three grades of heavy outs of back extraction device, 93, three grades of light phase exports of back extraction device, 94, three grades of reverse-extraction agent imports of back extraction device, 95, three grades of solvent inlets of back extraction device.

Embodiment

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

Embodiment 1

Referring to Fig. 1, adopt the phosphoric acid purification device of two-stage extraction, washing and back extraction, comprise extraction plant, washing device and back extraction device, wherein: extraction plant phase splitting device B light phase export 16 is connected with washing device solvent inlet 43, washing device phase splitting device B light phase export 50 is connected with back extraction device one-level solvent inlet 77, and back extraction device secondary light phase export 84 is connected with extraction plant solvent inlet 9;

Extraction plant comprises extraction plant mulser A1 and extraction plant phase splitting device A2, extraction plant mixing tank A10 and extraction plant phase splitting device B11, extraction plant mulser A1 is provided with extraction plant mulser A import 3, extraction plant mulser A outlet 4, extraction plant 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 mulser A35 and washing device phase splitting device A36, washing device mixing tank A44 and washing device phase splitting device B45, washing device mulser A35 is provided with washing device mulser A import 37, washing device mulser A outlet 38, washing device phase splitting device A36 is provided with washing device mixed phase import 39, washing device heavy out 40 and washing device light phase export 41, washing device mulser A import 37 is connected with washing device solvent inlet 43 with washing device phosphoric acid import 42, and washing device mulser A outlet 38 is connected with washing device mixed phase import 39; Washing device mixing tank A44 is provided with washing device mixing tank A continuous phase fluid inlet 46, washing device mixing tank A dispersed phase fluid inlet 47 and washing device mixing tank A mixed phase fluid outlet 48, washing device phase splitting device B45 is provided with washing device phase splitting device B mixed phase import 49, washing device phase splitting device B light phase export 50 and washing device phase splitting device B heavy out 51, and washing device mixing tank A mixed phase fluid outlet 48 is connected with washing device phase splitting device B mixed phase import 49; Washing device light phase export 41 is connected with washing device mixing tank A continuous phase fluid inlet 46 by the pipeline that is provided with pump, and washing device phase splitting device B heavy out 51 is connected with washing device phosphoric acid import 42 by the pipeline that is provided with pump;

Back extraction device comprises back extraction device one-level mulser 69 and back extraction device one-level phase splitting device 70, back extraction device secondary mulser 78 and back extraction device secondary phase splitting device 79, back extraction device one-level mulser 69 is provided with back extraction device one-level mulser import 71 and back extraction device one-level mulser outlet 72, back extraction device one-level phase splitting device 70 is provided with back extraction device one-level mixed phase import 73, back extraction device one-level heavy out 74 and back extraction device one-level light phase export 75, back extraction device one-level mulser import 71 is connected with back extraction device one-level solvent inlet 77 with back extraction device one-level reverse-extraction agent import 76, and back extraction device one-level mulser outlet 72 is connected with back extraction device one-level mixed phase import 73; Back extraction device secondary mulser 78 is provided with back extraction device secondary mulser import 80 and back extraction device secondary mulser outlet 81, back extraction device secondary phase splitting device 79 is provided with back extraction device secondary mixed phase import 82, back extraction device secondary heavy out 83 and back extraction device secondary light phase export 84, back extraction device secondary mulser import 80 is connected with back extraction device secondary solvent import 86 with back extraction device secondary reverse-extraction agent import 85, and back extraction device secondary mulser outlet 81 is connected with back extraction device secondary mixed phase import 82; Back extraction device one-level light phase export 75 is connected with back extraction device secondary solvent import 86 by pipeline, and back extraction device secondary heavy out 83 is connected with back extraction device one-level reverse-extraction agent import 76 by pipeline.

During use: at extraction plant, the phosphoric acid that comes out from phase splitting device B heavy out 17 all enters mulser A1 by mulser import 3 from phosphoric acid import 8, extraction agent (from the no-load solvent of back extraction device phase splitting device light phase export 74) from solvent inlet 9 under the effect of pump, extraction agent and phosphoric acid are finished the efficient mass transfer process in mulser A1, the mixed phase that forms comes out from mulser A1 outlet 4, enters phase splitting device A2 by mixed phase import 5.In 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 heavy out 6, and phosphoric acid is extracted the agent extraction to be become loaded solvent and come out from light phase export 7, enters mixing tank A10 through mixing tank A continuous phase fluid inlet 12 under the effect of pump; Feed phosphoric acid (fresh phosphoric) enters mixing tank A10 through mixing tank A dispersed phase fluid inlet 13, efficient mass transfer effect by mixing tank A10, further improve the phosphoric acid extraction rate, the mixed phase that forms comes out from mixing tank A mixed phase fluid outlet 14, enter phase splitting device B11 by phase splitting device B mixed phase import 15, in 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 phase splitting device B light phase export 16, heavy phase is then returned mulser A1 by phase splitting device B heavy out 17, thereby realizes extracting and separating.

At washing device, the phosphoric acid that comes out from washing device phase splitting device B heavy out 51 under the effect of pump from washing device phosphoric acid import 42, all enter washing device mulser A35 from washing device solvent inlet 43 by washing device mulser import 37 from the loaded solvent of extraction plant phase splitting device B light phase export 16, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device mulser A35, the mixed phase that forms comes out from washing device mulser A outlet 38, enters washing device phase splitting device A36 by washing device mixed phase import 39; In washing device phase splitting device A36, realize the layering of mixed phase, light, the heavy two-phase of formation; Impurity in the loaded solvent enters heavy phase to be become and washes spent acid and discharge from washing device heavy out 40, loaded solvent comes out from washing device light phase export 41, enters washing device mixing tank A44 through washing device mixing tank A continuous phase fluid inlet 46 under the effect of pump; Purifying phosphoric acid enters washing device mixing tank A44 through washing device mixing tank A dispersed phase fluid inlet 47, efficient mass transfer effect by washing device mixing tank A44, further improve washing effect, the mixed phase that forms comes out from washing device mixing tank A mixed phase fluid outlet 48, enter washing device phase splitting device B45 by washing device phase splitting device B mixed phase import 49, in washing device phase splitting device B45, realize the layering of mixed phase, what form is light, heavy two-phase, heavy phase is then returned washing device mulser A35 by washing device phase splitting device B heavy out 51, loaded solvent enters back extraction device continuous phase fluid inlet 71 from washing device phase splitting device B light phase export 50 after being cleaned phosphoric acid washing, realizes washing, purifying.

At back extraction device, the phosphoric acid that back extraction device secondary heavy out 83 comes out, under the effect of pump, enter back extraction device one-level mulser 69 from back extraction device one-level solvent inlet 77 by back extraction device one-level mulser import 71 from back extraction device one-level reverse-extraction agent import 76, the loaded solvent that comes from washing device, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device one-level mulser 69, the mixed phase that forms comes out from back extraction device one-level mulser outlet 72, enters back extraction device one-level phase splitting device 70 by back extraction device one-level mixed phase import 73.In back extraction device one-level 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 74 discharges of back extraction device one-level heavy out, the loaded solvent of being taken off part phosphoric acid comes out from back extraction device one-level light phase export 75, enters back extraction device secondary mulser 78 through back extraction device secondary solvent import 86 under the effect of pump.De-salted water enters back extraction device secondary mulser 78 through back extraction device secondary reverse-extraction agent import 85, efficient mass transfer effect by back extraction device secondary mulser 78, further improve the molten back extraction effect of load, the mixed phase that forms comes out from back extraction device secondary mulser outlet 81, enter back extraction device secondary phase splitting device 79 by back extraction device secondary mixed phase import 82, in back extraction device secondary phase splitting device 79, 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 84, phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device one-level mulser 69 by back extraction device secondary heavy out 83, realizes the recycle of extraction agent.

Embodiment 2

Referring to Fig. 2, adopt three grades of extractions, the phosphoric acid purification device of washing and back extraction, comprise extraction plant, washing device and back extraction device, wherein: extraction plant comprises extraction plant 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, extraction plant mulser B outlet 21 is connected with three grades of solvent inlets 26 of three grades of phosphoric acid imports 25 of extraction plant and extraction plant, and extraction plant mulser B exports 21 and 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 by pipeline, 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 solvent inlet 43;

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

Back extraction device comprises three grades of mulsers 87 of back extraction device and three grades of phase-splitting equipment 88 of back extraction device, three grades of mulsers 87 of back extraction device are provided with three grades of mulser imports 89 of back extraction device and three grades of mulser outlets 90 of back extraction device, three grades of phase-splitting equipment 88 of back extraction device are provided with three grades of mixed phase imports 91 of back extraction device, three grades of heavy outs 92 of back extraction device and three grades of light phase exports 93 of back extraction device, three grades of reverse-extraction agent imports 94 of three grades of mulser imports 89 of back extraction device and back extraction device are connected with three grades of solvent inlets 95 of back extraction device, and three grades of mulsers of back extraction device outlet 90 is connected with three grades of mixed phase imports 91 of back extraction device; Three grades of solvent inlets 95 of back extraction device secondary light phase export 84 and back extraction device are connected, three grades of heavy outs 92 of back extraction device are connected with back extraction device secondary reverse-extraction agent import 85, and three grades of phase-splitting equipment of back extraction device light phase export 93 is connected with extraction plant solvent inlet 9. and all the other are with embodiment 1.

During use, at extraction plant, the phosphoric acid that phase splitting device C heavy out 23 comes out returns mixing tank A10 under the effect of pump; Loaded solvent from phase splitting device B light phase export 16 come out, under the effect of pump through three grades of solvent inlets 26, feed phosphoric acid (fresh phosphoric) enters mulser B18 through three grades of phosphoric acid imports 25 by mulser B import 20; The mixed phase that forms comes out from mulser B outlet 21, enter phase splitting device C19 by phase splitting device C mixed phase import 22, in 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 phase splitting device C light phase export 24; Heavy phase is then returned mixing tank A10 by phase splitting device C heavy out 23, with of the efficient mass transfer effect of mixing tank A continuous phase fluid inlet 12 loaded solvents that enter by mixing tank A10, the mixed phase that forms comes out from mixing tank A mixed phase fluid outlet 14, enter phase splitting device B11 by phase splitting device B mixed phase import 15, in 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 mulser B18 from phase splitting device B light phase export 16, heavy phase is then returned mulser A1 by 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 back extraction device phase splitting device C light phase export 82) all enters mulser A1 by mulser import 3 from solvent inlet 9, extraction agent and phosphoric acid are finished the efficient mass transfer process in mulser A1, the mixed phase that forms comes out from mulser outlet 4, enters phase splitting device 2 by mixed phase import 5.In phase splitting device 2, realize the layering of mixed phase, light, the heavy two-phase of formation.Impurity in the phosphoric acid enters heavy phase becomes raffinate from heavy out 6 discharges.Phosphoric acid is extracted agent extraction to be become loaded solvent and comes out from light phase export 7, enters mixing tank A10 through mixing tank A continuous phase fluid inlet 12 under the effect of pump.

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

At back extraction device, the phosphoric acid that three grades of heavy outs 92 of back extraction device come out returns back extraction device secondary mulser 78 under the effect of pump; The loaded solvent that contains part phosphoric acid comes out from back extraction device secondary phase splitting device 79 light phase exports, under the effect of pump, enter three grades of mulsers 87 of back extraction device through three grades of reverse-extraction agent imports 94 of back extraction device through three grades of solvent inlets 95 of back extraction device, de-salted water, by the efficient mass transfer effect of multistage mulser, improved phosphoric acid back extraction effect as much as possible; The mixed phase that forms comes out from three grades of mulser outlets 90 of back extraction device, enter three grades of phase-splitting equipment 88 of back extraction device by three grades of mixed phase imports 91 of back extraction device, in three grades of phase-splitting equipment 88 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 93, phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device secondary mulser 78. by three grades of back extractions by back extraction device heavy out 92, phosphoric acid in the loaded solvent is desalted the water back extraction and enters heavy phase finally from 74 discharges of back extraction device one-level heavy out, becomes purifying phosphoric acid. and all the other are with embodiment 1.

Embodiment 3

Referring to Fig. 3, adopt three grades of extractions, the phosphoric acid purification device of washing and back extraction, comprise extraction plant, washing device and back extraction device, wherein: extraction plant comprises extraction plant 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 are 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 by the pipeline that is provided with pump, 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 solvent inlet 43;

Washing device comprises washing device mixing tank B61 and washing device phase splitting device D62, washing device mixing tank B61 is provided with washing device mixing tank B continuous phase fluid inlet 63, washing device mixing tank B dispersed phase fluid inlet 64 and washing device mixing tank B mixed phase fluid outlet 65, washing device phase splitting device D62 is provided with washing device phase splitting device D mixed phase import 66, washing device phase splitting device D light phase export 67 and washing device phase splitting device D heavy out 68, washing device mixing tank B mixed phase fluid outlet 65 are connected with washing device phase splitting device D mixed phase import 66; Washing device phase splitting device B light phase export 50 is connected with washing device mixing tank B continuous phase fluid inlet 63 by the pipeline that is provided with pump, washing device phase splitting device D heavy out 68 is connected with washing device mixing tank A dispersed phase fluid inlet 47 by the pipeline that is provided with pump, and washing device phase splitting device D light phase export 67 is connected with back extraction device one-level solvent inlet 77;

Back extraction device comprises three grades of mulsers 87 of back extraction device and three grades of phase-splitting equipment 88 of back extraction device, three grades of mulsers 87 of back extraction device are provided with three grades of mulser imports 89 of back extraction device and three grades of mulser outlets 90 of back extraction device, three grades of phase-splitting equipment 88 of back extraction device are provided with three grades of mixed phase imports 91 of back extraction device, three grades of heavy outs 92 of back extraction device and three grades of light phase exports 93 of back extraction device, three grades of reverse-extraction agent imports 94 of three grades of mulser imports 89 of back extraction device and back extraction device are connected with three grades of solvent inlets 95 of back extraction device, and three grades of mulsers of back extraction device outlet 90 is connected with three grades of mixed phase imports 91 of back extraction device; Three grades of solvent inlets 95 of back extraction device secondary light phase export 84 and back extraction device are connected, and three grades of heavy outs 92 of back extraction device are connected with back extraction device secondary reverse-extraction agent import 85, and three grades of phase-splitting equipment of back extraction device light phase export 93 is connected with extraction plant solvent inlet 9.All the other are with embodiment 1.

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

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

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 CN1555707A, 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 (16) is connected with washing device solvent inlet (43), washing device phase splitting device B light phase export (50) is connected with back extraction device one-level solvent inlet (77), and back extraction device secondary light phase export (84) is connected with extraction plant solvent inlet (9);

Extraction plant comprises extraction plant mulser A (1) and extraction plant phase splitting device A (2), extraction plant mixing tank A (10) and extraction plant phase splitting device B (11), extraction plant mulser A (1) is provided with extraction plant mulser A import (3), extraction plant mulser A exports (4), extraction plant 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), and extraction plant phase splitting device B heavy out (17) is connected with extraction plant phosphoric acid import (8);

Washing device comprises washing device mulser A (35) and washing device phase splitting device A (36), washing device mixing tank A (44) and washing device phase splitting device B (45), washing device mulser A (35) is provided with washing device mulser A import (37), washing device mulser A exports (38), washing device phase splitting device A (36) is provided with washing device mixed phase import (39), washing device heavy out (40) and washing device light phase export (41), washing device mulser A import (37) is connected with washing device solvent inlet (43) with washing device phosphoric acid import (42), and washing device mulser A outlet (38) is connected with washing device mixed phase import (39); Washing device mixing tank A (44) is provided with washing device mixing tank A continuous phase fluid inlet (46), washing device mixing tank A dispersed phase fluid inlet (47) and washing device mixing tank A mixed phase fluid outlet (48), washing device phase splitting device B (45) is provided with washing device phase splitting device B mixed phase import (49), washing device phase splitting device B light phase export (50) and washing device phase splitting device B heavy out (51), and washing device mixing tank A mixed phase fluid outlet (48) is connected with washing device phase splitting device B mixed phase import (49); Washing device light phase export (41) is connected with washing device mixing tank A continuous phase fluid inlet (46), and washing device phase splitting device B heavy out (51) is connected with washing device phosphoric acid import (42).

Back extraction device comprises back extraction device one-level mulser (69) and back extraction device one-level phase splitting device (70), back extraction device secondary mulser (78) and back extraction device secondary phase splitting device (79), back extraction device one-level mulser (69) is provided with back extraction device one-level mulser import (71) and back extraction device one-level mulser outlet (72), back extraction device one-level phase splitting device (70) is provided with back extraction device one-level mixed phase import (73), back extraction device one-level heavy out (74) and back extraction device one-level light phase export (75), back extraction device one-level mulser import (71) is connected with back extraction device one-level solvent inlet (77) with back extraction device one-level reverse-extraction agent import (76), and back extraction device one-level mulser outlet (72) is connected with back extraction device one-level mixed phase import (73); Back extraction device secondary mulser (78) is provided with back extraction device secondary mulser import (80) and back extraction device secondary mulser outlet (81), back extraction device secondary phase splitting device (79) is provided with back extraction device secondary mixed phase import (82), back extraction device secondary heavy out (83) and back extraction device secondary light phase export (84), back extraction device secondary mulser import (80) is connected with back extraction device secondary solvent import (86) with back extraction device secondary reverse-extraction agent import (85), and back extraction device secondary mulser outlet (81) is connected with back extraction device secondary mixed phase import (82); Back extraction device one-level light phase export (75) is connected with back extraction device secondary solvent import (86), and back extraction device secondary heavy out (83) is connected with back extraction device one-level reverse-extraction agent import (76).

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 outlet (21) is connected with three grades of solvent inlets of three grades of phosphoric acid imports of extraction plant (25) and extraction plant (26), and extraction plant mulser B outlet (21) is connected with phase splitting device C mixed phase import (22); Extraction plant phase splitting device B light phase export (16) is connected with three grades of solvent inlets of extraction plant (26), extraction plant phase splitting device C heavy out (23) is connected with extraction plant mixing tank A dispersed phase fluid inlet (13), and extraction plant phase splitting device C light phase export (24) is connected with washing device solvent inlet (43);

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

Back extraction device comprises three grades of mulsers of back extraction device (87) and three grades of phase-splitting equipment of back extraction device (88), three grades of mulsers of back extraction device (87) are provided with three grades of mulser imports of back extraction device (89) and three grades of mulser outlets of back extraction device (90), three grades of phase-splitting equipment of back extraction device (88) are provided with three grades of mixed phase imports of back extraction device (91), three grades of light phase exports of three grades of heavy outs of back extraction device (92) and back extraction device (93), three grades of mulser imports of back extraction device (89) are connected with three grades of solvent inlets of three grades of reverse-extraction agent imports of back extraction device (94) and back extraction device (95), and three grades of mulser outlets of back extraction device (90) are connected with three grades of mixed phase imports of back extraction device (91); Back extraction device secondary light phase export (84) is connected with three grades of solvent inlets of back extraction device (95), three grades of heavy outs of back extraction device (92) are connected with back extraction device secondary reverse-extraction agent import (85), and three grades of phase-splitting equipment of back extraction device light phase export (93) is connected with extraction plant solvent inlet (9).

3. phosphoric acid purification device as claimed in claim 1, it is characterized in that: extraction plant comprises extraction plant mixing tank B (27) and extraction plant phase splitting device D (28), 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 solvent inlet (43);

Washing device comprises washing device mixing tank B (61) and washing device phase splitting device D (62), washing device mixing tank B (61) is provided with washing device mixing tank B continuous phase fluid inlet (63), washing device mixing tank B dispersed phase fluid inlet (64) and washing device mixing tank B mixed phase fluid outlet (65), washing device phase splitting device D (62) is provided with washing device phase splitting device D mixed phase import (66), washing device phase splitting device D light phase export (67) and washing device phase splitting device D heavy out (68), washing device mixing tank B mixed phase fluid outlet (65) is connected with washing device phase splitting device D mixed phase import (66); Washing device phase splitting device B light phase export (50) is connected with washing device mixing tank B continuous phase fluid inlet (63), washing device phase splitting device D heavy out (68) is connected with washing device mixing tank A dispersed phase fluid inlet (47), and washing device phase splitting device D light phase export (67) is connected with back extraction device one-level solvent inlet (77).

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

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