CN201864571U

CN201864571U - Phosphoric acid purification device

Info

Publication number: CN201864571U
Application number: CN2010206242463U
Authority: CN
Inventors: 李红林; 骆广生; 王权顶; 孙应伦
Original assignee: Wengfu Group Co Ltd
Current assignee: Wengfu Group Co Ltd
Priority date: 2010-11-25
Filing date: 2010-11-25
Publication date: 2011-06-15
Anticipated expiration: 2020-11-25

Abstract

The utility model discloses a phosphoric acid purification device. The phosphoric acid purification device comprises an extraction device, a washing device and a back extraction device, wherein the extraction device selects and uses a combination of two groups of emulsifying machines and phase separation equipment, or is combined by adding a combination of one or multiple groups of emulsifying machines and phase separation equipment to the combination; the washing device selects and uses a combination of a group of emulsifying machines and phase separation equipment with a group of mixers and phase separation equipment, or is formed by adding one or multiple groups of mixers and phase separation equipment (or emulsifying machines and phase separation equipment) on the combination; and the back extraction device is formed by selecting and using a combination of two groups of mixers and phase separation equipment or formed by adding one or multiple groups of mixers and phase separation equipment to the combination. A first-stage solvent inlet of the extraction device is connected with a light phase outlet of last-stage phase separation equipment of the back extraction device; a first-stage solvent inlet of the washing device is connected with a last-stage light phase outlet of the extraction device; and a first-stage solvent inlet of the back extraction device is connected with a last-stage light phase outlet of the washing device. Through the adoption of the phosphoric acid purification device, the mass transfer performance can be enhanced, the purification efficiency can be improved, the equipment investment and the operation cost can be reduced, and the occupied area is small.

Description

Phosphoric acid purification device

Technical field

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

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 CN1658807A, 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.Mixing tank is widely used in fine chemistry industry at present: resin emulsification, silicone oil emulsification, carbon black dispersion, fillers dispersed etc.; Be applied to petrochemical complex: heavy oil emulsive, emulsified bitumen, wax emulsification etc.; Biological medicine: microcapsule emulsification, medicine emulsion, cell tissue fragmentation etc.

Summary of the invention

The purpose of this utility model be to overcome above-mentioned shortcoming and provide a kind of can the reinforcing mass transfer performance, improve purification efficiency, reduce facility investment and working cost and the little phosphoric acid purification device of floor space.

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

Extraction plant comprises extraction plant one-level mulser and extraction plant one-level phase splitting device, extraction plant secondary mulser and extraction plant secondary phase splitting device, extraction plant one-level mulser is provided with extraction plant one-level mulser inlet and the outlet of extraction plant one-level mulser, extraction plant one-level phase splitting device is provided with extraction plant one-level mixed phase inlet, extraction plant one-level heavy out and extraction plant one-level light phase export, extraction plant one-level mulser inlet is connected with extraction plant one-level phosphoric acid inlet and extraction plant one-level colvent inlet, and the outlet of extraction plant one-level mulser is connected with extraction plant one-level mixed phase inlet; Extraction plant secondary mulser is provided with extraction plant secondary mulser inlet and the outlet of extraction plant secondary mulser, extraction plant secondary phase splitting device is provided with extraction plant secondary mixed phase inlet, extraction plant secondary heavy out and extraction plant secondary light phase export, extraction plant secondary mulser inlet is connected with extraction plant secondary phosphoric acid inlet and extraction plant secondary solvent inlet, and the outlet of extraction plant secondary mulser is connected with extraction plant secondary mixed phase inlet; Extraction plant one-level light phase export is connected with extraction plant secondary solvent inlet, and extraction plant secondary heavy out is connected with extraction plant one-level phosphoric acid inlet;

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 inlet, washing device mulser A outlet, washing device phase splitting device A is provided with washing device phase splitting device A mixed phase inlet, washing device phase splitting device A heavy out and washing device phase splitting device A light phase export, washing device mulser A inlet is connected with washing device one-level colvent inlet with washing device one-level phosphoric acid inlet, and washing device mulser A outlet is connected with washing device phase splitting device A mixed phase inlet; 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 washing device phase splitting device B mixed phase inlet, 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 washing device phase splitting device B mixed phase inlet; Washing device phase splitting device A light phase export is connected with washing device mixing tank A continuous phase fluid inlet, and washing device phase splitting device B heavy out is connected with washing device one-level phosphoric acid inlet;

Back extraction device comprises back extraction device one-level mixing tank and back extraction device one-level phase splitting device, back extraction device secondary mixing tank and back extraction device secondary phase splitting device, back extraction device one-level mixing tank is provided with back extraction device one-level colvent inlet, back extraction device one-level reverse-extraction agent inlet and the outlet of back extraction device one-level mixed phase fluid, back extraction device one-level phase splitting device is provided with back extraction device one-level mixed phase inlet, back extraction device one-level heavy out and back extraction device one-level light phase export, and the outlet of back extraction device one-level mixed phase fluid is connected with back extraction device one-level mixed phase inlet; Back extraction device secondary mixing tank is provided with back extraction device secondary solvent inlet back extraction device secondary reverse-extraction agent inlet and the outlet of back extraction device secondary mixed phase fluid, back extraction device secondary phase splitting device is provided with back extraction device secondary mixed phase inlet, 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 back extraction device secondary mixed phase inlet; Back extraction device one-level light phase export is connected with back extraction device secondary solvent inlet, and back extraction device secondary heavy out is connected with back extraction device one-level reverse-extraction agent inlet.

Above-mentioned phosphoric acid purification device, wherein: extraction plant comprises three grades of mulsers of extraction plant and three grades of phase-splitting equipment of extraction plant, three grades of mulsers of extraction plant are provided with three grades of mulser inlets of extraction plant and three grades of mulser outlets of extraction plant, three grades of phase-splitting equipment of extraction plant are provided with three grades of mixed phase inlets of extraction plant, three grades of heavy outs of extraction plant and three grades of light phase exports of extraction plant, three grades of phosphoric acid inlets of three grades of mulser inlets of extraction plant and extraction plant and three grades of colvent inlets of extraction plant are connected, and three grades of mixed phase inlets of three grades of mulser outlets of extraction plant and extraction plant are connected; Three grades of colvent inlets of extraction plant secondary light phase export and extraction plant are connected, and three grades of heavy outs of extraction plant are connected with extraction plant secondary phosphoric acid inlet, and three grades of light phase exports of extraction plant are connected with washing device one-level colvent inlet;

Washing device comprises washing device mixing tank B and washing device phase splitting device C, washing device mixing tank B is provided with washing device mixing tank B continuous phase fluid inlet, washing device mixing tank B dispersed phase fluid inlet and the outlet of washing device mixing tank B mixed phase fluid, washing device phase splitting device C is provided with washing device phase splitting device C mixed phase inlet, washing device phase splitting device C light phase export and washing device phase splitting device C heavy out, and the outlet of washing device mixing tank B mixed phase fluid is connected with washing device phase splitting device C mixed phase inlet; Washing device phase splitting device B light phase export is connected with washing device mixing tank B continuous phase fluid inlet, washing device phase splitting device C heavy out is connected with washing device mixing tank A dispersed phase fluid inlet, and washing device phase splitting device C light phase export is connected with back extraction device one-level colvent 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 colvent inlets of back extraction device, three grades of reverse-extraction agent inlets of back extraction device 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 back extraction device three grades of mixed phase inlets, 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 inlets of three grades of mixed phase fluid outlets of back extraction device and back extraction device are connected; Three grades of colvent 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 reverse-extraction agent inlet, and three grades of light phase exports of back extraction device are connected with extraction plant one-level colvent inlet.

Washing device comprises washing device mulser B and washing device phase splitting device D, washing device mulser B is provided with washing device mulser B inlet, washing device mulser B outlet, washing device phase splitting device D is provided with washing device phase splitting device D mixed phase inlet, washing device phase splitting device D heavy out and washing device phase splitting device D light phase export, three grades of phosphoric acid inlets of washing device mulser B inlet and washing device are connected with three grades of colvent inlets of washing device, and washing device mulser B outlet is connected with washing device phase splitting device D mixed phase inlet; Three grades of colvent inlets of washing device phase splitting device B light phase export and washing device are connected, washing device phase splitting device D heavy out is connected with washing device mixing tank A dispersed phase fluid inlet, and washing device phase splitting device D light phase export is connected with back extraction device one-level colvent inlet;

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

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

The utility model compared with prior art, as can be known from the above technical solutions, require difference according to purifying, constitute extraction plant, washing device and the back extraction device of phosphoric acid purification device, wherein: extraction plant is selected the combination of two-stage group mulser and phase splitting device for use or increase by one group on aforesaid combination and combined by many groups mulser and phase splitting device; Washing device is selected the combination of one group of mixing tank and phase splitting device and one group of mulser and phase splitting device for use, or on aforesaid combination, increasing one or more groups mixing tank and phase splitting device (or mulser and phase splitting device) constitutes, back extraction device is selected the combination of two-stage group mixing tank and phase splitting device for use or is increased one or more groups mixing tank and phase splitting device combines on aforesaid combination.In the phosphoric acid purification process, feed phosphoric acid (fresh phosphoric), de-salted water add by extraction plant final stage phosphoric acid inlet, back extraction device final stage reverse-extraction agent inlet; Washing acid (purifying phosphoric acid), (or the phosphoric acid of mulser inlet adds by washing device final stage mixer disperses phase fluid inlet.The no-load solvent of extraction plant one-level colvent inlet is from back extraction device final stage light phase export, the loaded solvent of washing device one-level colvent inlet is from extraction plant final stage light phase export, and the loaded solvent of back extraction device one-level colvent inlet is from washing device final stage light phase export.Because mixing tank, mulser mass transfer area are big, the mass-transfer efficiency height.The mixed solution that comes out from mixing tank, mulser is easy to phase-splitting, thereby guarantees to divide phase effect.The purifying phosphoric acid foreign matter content that obtains is low, but by refining production food grade and electron-level phosphoric acid.System's material loading level is little, avoids hazardous material (fluids) (as phosphoric acid, organic extractant) to leak in a large number and the peace ring accident that causes; Mixing tank, mulser floor space are little, and appliance arrangement is arranged simple, and factory building can be realized miniaturization; Mixing tank, mulser cost are low, can save facility investment.

Description of drawings

Fig. 1 is embodiment 1 structural representation;

Fig. 2 is embodiment 2 structural representations;

Fig. 3 is embodiment 3 structural representations.

Mark among the figure:

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

Extraction plant comprises extraction plant one-level mulser 1 and extraction plant one-level phase splitting device 2, extraction plant secondary mulser 10 and extraction plant secondary phase splitting device 11, extraction plant one-level mulser 1 is provided with extraction plant one-level mulser inlet 3 and extraction plant one-level mulser outlet 4, extraction plant one-level phase splitting device 2 is provided with extraction plant one-level mixed phase inlet 5, extraction plant one-level heavy out 6 and extraction plant one-level light phase export 7, extraction plant one-level mulser inlet 3 is connected with extraction plant one-level phosphoric acid inlet 8 and extraction plant one-level colvent inlet 9, and the outlet 4 of extraction plant one-level mulser is connected with extraction plant one-level mixed phase inlet 5; Extraction plant secondary mulser 10 is provided with extraction plant secondary mulser inlet 12 and extraction plant secondary mulser outlet 13, extraction plant secondary phase splitting device 11 is provided with extraction plant secondary mixed phase inlet 14, extraction plant secondary heavy out 15 and extraction plant secondary light phase export 16, extraction plant secondary mulser inlet 12 is connected with extraction plant secondary phosphoric acid inlet 17 and extraction plant secondary solvent inlet 18, and the outlet 13 of extraction plant secondary mulser is connected with extraction plant secondary mixed phase inlet 14; Extraction plant one-level light phase export 7 is connected with extraction plant secondary solvent inlet 18, and extraction plant secondary heavy out 15 is connected with extraction plant one-level phosphoric acid inlet 8;

Washing device comprises washing device mulser A28 and washing device phase splitting device A29, washing device mixing tank A37 and washing device phase splitting device B38, washing device mulser A28 is provided with washing device mulser A inlet 30, washing device mulser A outlet 31, washing device phase splitting device A29 is provided with washing device phase splitting device A mixed phase inlet 32, washing device phase splitting device A heavy out 33 and washing device phase splitting device A light phase export 34, washing device mulser A inlet 30 and washing device one-level phosphoric acid inlet 35 are connected with washing device one-level colvent inlet 36, and washing device mulser A exports 31 and enters the mouth with washing device phase splitting device A mixed phase and 32 to be connected; Washing device mixing tank A37 is provided with washing device mixing tank A continuous phase fluid inlet 39, washing device mixing tank A dispersed phase fluid inlet 40 and washing device mixing tank A mixed phase fluid outlet 41, washing device phase splitting device B38 is provided with washing device phase splitting device B mixed phase inlet 42, washing device phase splitting device B light phase export 43 and washing device phase splitting device B heavy out 44, and the outlet 41 of washing device mixing tank A mixed phase fluid is connected with washing device phase splitting device B mixed phase inlet 42; Washing device phase splitting device A light phase export 34 is connected with washing device mixing tank A continuous phase fluid inlet 39, and washing device phase splitting device B heavy out 44 is connected with washing device one-level phosphoric acid inlet 35;

Back extraction device comprises back extraction device one-level mixing tank 62 and back extraction device one-level phase splitting device 63, back extraction device secondary mixing tank 70 and back extraction device secondary phase splitting device 71, back extraction device one-level mixing tank 62 is provided with back extraction device one-level colvent inlet 64, back extraction device one-level reverse-extraction agent inlet 65 and back extraction device one-level mixed phase fluid outlet 66, back extraction device one-level phase splitting device 63 is provided with back extraction device one-level mixed phase inlet 67, back extraction device one-level heavy out 69 and back extraction device one-level light phase export 68, the outlet 66 of back extraction device one-level mixed phase fluid is connected with back extraction device one-level mixed phase inlet 67; Back extraction device secondary mixing tank 70 is provided with back extraction device secondary solvent enter the mouth 72 back extraction device secondary reverse-extraction agents inlet 73 and back extraction device secondary mixed phase fluid outlet 74, back extraction device secondary phase splitting device 71 is provided with back extraction device secondary mixed phase inlet 75, back extraction device secondary heavy out 77 and back extraction device secondary light phase export 76, and the outlet 74 of back extraction device secondary mixed phase fluid is connected with back extraction device secondary mixed phase inlet 75; Back extraction device one-level light phase export 68 is connected with back extraction device secondary solvent inlet 72, and back extraction device secondary heavy out 77 is connected with back extraction device one-level reverse-extraction agent inlet 65.

During use: at extraction plant, the phosphoric acid that extraction plant secondary heavy out 15 comes out, under the effect of pump, enter the mouth 8 from extraction plant one-level phosphoric acid, extraction agent (from the no-load solvent of back extraction device secondary light phase export 76) enters extraction plant one-level mulser 1 from extraction plant one-level colvent inlet 9 by extraction plant one-level mulser inlet 3, extraction agent and phosphoric acid are finished the efficient mass transfer process in extraction plant one-level mulser 1, the mixed phase that forms comes out from extraction plant one-level mulser outlet 4, enters extraction plant one-level phase splitting device 2 by extraction plant one-level mixed phase inlet 5; In extraction plant one-level phase splitting device 2, realize the layering of mixed phase, form light, heavy two-phase; Impurity in the phosphoric acid enters heavy phase becomes raffinate from 6 discharges of extraction plant one-level heavy out; Phosphoric acid is extracted agent extraction to be become loaded solvent and comes out from extraction plant one-level light phase export 7, enters extraction plant secondary mulser 10 through extraction plant secondary solvent inlet 18 by extraction plant secondary mulser inlet 12 under the effect of pump; Feed phosphoric acid (fresh phosphoric) enters extraction plant secondary mulser 10 through extraction plant secondary phosphoric acid inlet 17 by extraction plant secondary mulser inlet 12, efficient mass transfer effect by extraction plant secondary mulser 10, further improve the phosphoric acid extraction rate, the mixed phase that forms comes out from extraction plant secondary mulser outlet 13, enter extraction plant secondary phase splitting device 11 by extraction plant secondary mixed phase inlet 14, in extraction plant secondary phase splitting device 11, realize the layering of mixed phase, form 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 secondary light phase export 16, heavy phase is then returned extraction plant one-level mulser 1 by extraction plant secondary heavy out 15, thereby realizes extracting and separating.

At washing device, the phosphoric acid that comes out from washing device phase splitting device B heavy out 44 enters the mouth 35 from washing device mulser A phosphoric acid under the effect of pump, loaded solvent from extraction plant secondary phase splitting device 11 light phase exports 16 all enters washing device mulser A28 by washing device mulser A inlet 30 from washing device mulser A colvent inlet 36, loaded solvent and washing acid are finished the efficient mass transfer process in washing device mulser A28, the mixed phase that forms comes out from washing device mulser A outlet 31, enters washing device phase splitting device A29 by washing device phase splitting device A mixed phase inlet 32; In washing device phase splitting device A29, realize the layering of mixed phase, light, the heavy two-phase of formation; Impurity in the loaded solvent enters heavy phase to be become and washes spent acid and discharge from washing device phase splitting device A heavy out 33, loaded solvent comes out from washing device phase splitting device A light phase export 34, enters washing device mixing tank A37 through washing device mixing tank A continuous phase fluid inlet 39 under the effect of pump; Purifying phosphoric acid enters washing device mixing tank A37 through washing device mixing tank A dispersed phase fluid inlet 40, efficient mass transfer effect by washing device mixing tank A37, further improve washing effect, the mixed phase that forms comes out from washing device mixing tank B mixed phase fluid outlet 41, enter washing device phase splitting device B38 by washing device phase splitting device B mixed phase inlet 42, in washing device phase splitting device B38, realize the layering of mixed phase, what form is light, heavy two-phase, heavy phase is then returned washing device mulser A28 by washing device phase splitting device B heavy out 44, loaded solvent enters back extraction device one-level colvent inlet 64 from washing device phase splitting device B light phase export 43 after being cleaned phosphoric acid washing, realizes washing, purifying.

At back extraction device, the phosphoric acid that back extraction device back extraction device secondary heavy out 77 comes out, the loaded solvent that return back extraction device back extraction device one-level reverse-extraction agent inlet 65 under the effect of pump, comes from washing device enters back extraction device mixing tank 62 from back extraction device one-level colvent inlet 64, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mixing tank 62, the mixed phase that forms comes out from back extraction device mixed phase fluid outlet 66, enters back extraction device one-level phase splitting device 63 by back extraction device mixed phase inlet 67.In back extraction device one-level phase splitting device 66, 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 69 discharges of back extraction device one-level heavy out, the loaded solvent of being taken off part phosphoric acid comes out from back extraction device one-level light phase export 68, enters back extraction device secondary mixing tank 70 through back extraction device secondary solvent inlet 72 under the effect of pump.De-salted water enters back extraction device secondary mixing tank 70 through back extraction device secondary reverse-extraction agent inlet 73, efficient mass transfer effect by back extraction device secondary mixing tank 70, further improve the back extraction effect of loaded solvent, the mixed phase that forms comes out from back extraction device secondary mixed phase fluid outlet 74, enter back extraction device secondary phase splitting device 71 by back extraction device secondary phase splitting device mixed phase inlet 75, in back extraction device secondary phase splitting device 71, 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 76, and the phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device one-level mixing tank 62 by back extraction device secondary heavy out 77.

Embodiment 2

Referring to Fig. 2, adopt three grades of extractions, the phosphoric acid purification device of washing, comprise extraction plant, washing device and back extraction device, wherein: extraction plant comprises three grades of mulsers 19 of extraction plant and three grades of phase-splitting equipment 20 of extraction plant, three grades of mulsers 19 of extraction plant are provided with three grades of mulser inlets 21 of extraction plant and three grades of mulser outlets 22 of extraction plant, three grades of phase-splitting equipment 20 of extraction plant are provided with three grades of mixed phase inlets 23 of extraction plant, three grades of heavy outs 24 of extraction plant and three grades of light phase exports 25 of extraction plant, three grades of phosphoric acid inlets 26 of three grades of mulser inlets 21 of extraction plant and extraction plant and three grades of colvent inlets 27 of extraction plant are connected, and three grades of mixed phase inlets 23 of three grades of mulser outlets 22 of extraction plant and extraction plant are connected; Three grades of colvent inlets 27 of extraction plant secondary light phase export 16 and extraction plant are connected, and three grades of heavy outs 24 of extraction plant are connected with extraction plant secondary phosphoric acid inlet 17, and three grades of light phase exports 25 of extraction plant are connected with washing device one-level colvent inlet 36;

Washing device comprises washing device mixing tank B45 and washing device phase splitting device C46, washing device mixing tank B45 is provided with washing device mixing tank B continuous phase fluid inlet 47, washing device mixing tank B dispersed phase fluid inlet 48 and washing device mixing tank B mixed phase fluid outlet 49, washing device phase splitting device C46 is provided with washing device phase splitting device C mixed phase inlet 50, washing device phase splitting device C light phase export 51 and washing device phase splitting device C heavy out 52, the outlet 49 of washing device mixing tank B mixed phase fluid is connected with washing device phase splitting device C mixed phase inlet 50; Washing device phase splitting device B light phase export 43 is connected with washing device mixing tank B continuous phase fluid inlet 47, washing device phase splitting device C heavy out 52 is connected with washing device mixing tank A dispersed phase fluid inlet 40, and washing device phase splitting device C light phase export 51 is connected with back extraction device one-level colvent inlet 64;

Back extraction device comprises three grades of mixing tanks 78 of back extraction device and three grades of phase-splitting equipment 79 of back extraction device, three grades of mixing tanks 78 of back extraction device are provided with three grades of colvent inlets 80 of back extraction device, three grades of reverse-extraction agent inlets 81 of back extraction device and three grades of mixed phase fluid outlets 82 of back extraction device, three grades of phase-splitting equipment 79 of back extraction device are provided with back extraction device three grades of mixed phase inlets 83, three grades of heavy outs 85 of back extraction device and three grades of light phase exports 84 of back extraction device, and three grades of mixed phase inlets 83 of three grades of mixed phase fluid outlets 82 of back extraction device and back extraction device are connected; Three grades of colvent inlets 80 of back extraction device secondary light phase export 76 and back extraction device are connected, and three grades of heavy outs 85 of back extraction device are connected with back extraction device secondary reverse-extraction agent inlet 73, and three grades of light phase exports 84 of back extraction device are connected with extraction plant one-level colvent inlet 9.

During use, at extraction plant, the phosphoric acid that extraction plant secondary heavy out 15 comes out, under the effect of pump, enter the mouth 8 from extraction plant one-level phosphoric acid, extraction agent (from the no-load solvent of three grades of phase-splitting equipment of back extraction device light phase export 84) enters extraction plant one-level mulser 1 from extraction plant one-level colvent inlet 9 by extraction plant one-level mulser inlet 3, extraction agent and phosphoric acid are finished the efficient mass transfer process in extraction plant one-level mulser 1, the mixed phase that forms comes out from extraction plant one-level mulser outlet 4, enters extraction plant one-level phase splitting device 2 by extraction plant one-level mixed phase inlet 5; In extraction plant one-level phase splitting device 2, realize the layering of mixed phase, form light, heavy two-phase; Impurity in the phosphoric acid enters heavy phase becomes raffinate from 6 discharges of extraction plant one-level heavy out; Phosphoric acid is extracted agent extraction to be become loaded solvent and comes out from extraction plant one-level light phase export 7, enters extraction plant secondary mulser 10 through extraction plant secondary solvent inlet 18 by extraction plant secondary mulser inlet 12 under the effect of pump; Feed phosphoric acid enters extraction plant secondary mulser 10 through extraction plant secondary phosphoric acid inlet 17 by extraction plant secondary mulser inlet 12, efficient mass transfer effect by extraction plant secondary mulser 10, further improve the phosphoric acid extraction rate, the mixed phase that forms comes out from extraction plant secondary mulser outlet 13, enter extraction plant secondary phase splitting device 11 by extraction plant secondary mixed phase inlet 14, in extraction plant secondary phase splitting device 11, realize the layering of mixed phase, what form is light, heavy two-phase, impurity in the phosphoric acid enters heavy phase, come out from heavy out 15, at the effect of pump extraction plant one-level phosphoric acid inlet 8 next time, most of phosphoric acid is extracted the agent extraction and enters and gently form loaded solvent mutually and enter three grades of mulsers 19 of extraction plant from extraction plant secondary light phase export 16 by three grades of mulsers inlets 27 of extraction plant; Feed phosphoric acid (fresh phosphoric) enters three grades of mulsers 19 of extraction plant through three grades of phosphoric acid inlets 26 of extraction plant by three grades of mulser inlets 21 of extraction plant, efficient mass transfer effect by three grades of mulsers 19 of extraction plant, further improve the phosphoric acid extraction rate, the mixed phase that forms comes out from three grades of mulser outlets 22 of extraction plant, enter three grades of phase-splitting equipment 20 of extraction plant by three grades of mixed phase inlets 23 of extraction plant, in three grades of phase-splitting equipment 20 of extraction plant, realize the layering of mixed phase, form 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 three grades of light phase exports 25 of extraction plant, heavy phase is then returned extraction plant secondary mulser 10 by three grades of heavy outs 24 of extraction plant, thereby realizes extracting and separating.

At washing device, the loaded solvent that comes out from washing device phase splitting device B light phase export 43, enter washing device mixing tank B45 through washing device mixing tank B continuous phase fluid inlet 47 under the effect of pump, washing acid (purifying phosphoric acid) enters washing device mixing tank B45 through washing device mixing tank B dispersed phase fluid inlet 48; The mixed phase that forms comes out from washing device mixing tank B mixed phase fluid outlet 49, enter washing device phase splitting device C46 by washing device phase splitting device C mixed phase inlet 50, in washing device phase splitting device C46, realize the layering of mixed phase, form light, heavy two-phase, loaded solvent comes out to enter back extraction device from washing device phase splitting device C light phase export 51 after being washed pickling impurity removal matter; Heavy phase is then come out by washing device phase splitting device C heavy out 52, returns washing device mixing tank A37 by washing device mixing tank A dispersed phase fluid inlet 40 under the effect of pump; Loaded solvent comes out from the light phase export 34 of washing device phase splitting device A, under the effect of pump, enter washing device mixing tank A37 through washing device mixing tank A continuous phase fluid inlet 39, efficient mass transfer effect by washing device mixing tank A37, the mixed phase that forms comes out from washing device mixing tank A37 mixed phase fluid outlet 41, enter washing device phase splitting device B38 by washing device phase splitting device B mixed phase inlet 42, in washing device phase splitting device B38, realize the layering of mixed phase, form light, heavy two-phase, loaded solvent enters washing device mixing tank B45 from washing device phase splitting device B light phase export 43, heavy phase then enters the mouth 35 from washing device mulser A phosphoric acid by washing device phase splitting device B heavy out 44 under the effect of pump, loaded solvent all enters washing device mulser A28 by washing device mulser A inlet 30 from washing device mulser A colvent inlet 36, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device mulser A28, the mixed phase that forms comes out from washing device mulser A outlet 31, enters washing device phase splitting device A29 by mixed phase inlet 32; In washing device phase splitting device A29, 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 phase splitting device A heavy out 33, and loaded solvent comes out to enter washing device mixing tank A37 from light phase export 34.

At back extraction device, the phosphoric acid that back extraction device secondary heavy out 77 comes out, the loaded solvent that return back extraction device one-level reverse-extraction agent inlet 65 under the effect of pump, comes from washing device enters back extraction device one-level mixing tank 62 from back extraction device one-level colvent inlet 64, loaded solvent and reverse-extraction agent are finished the efficient mass transfer process in back extraction device one-level mixing tank 62, the mixed phase that forms comes out from back extraction device one-level mixed phase fluid outlet 66, enters back extraction device one-level phase splitting device 63 by back extraction device one-level mixed phase inlet 67.In back extraction device one-level phase splitting device 63, realize the layering of mixed phase, light, the heavy two-phase of formation.Phosphoric acid in the loaded solvent enters heavy phase becomes purifying phosphoric acid from 69 discharges of back extraction device one-level heavy out, the loaded solvent of being taken off part phosphoric acid comes out from back extraction device one-level light phase export 68, enters back extraction device secondary mixing tank 70 through back extraction device secondary solvent inlet 72 under the effect of pump.Reverse-extraction agent enters back extraction device secondary mixing tank 70 through back extraction device secondary reverse-extraction agent inlet 73, efficient mass transfer effect by back extraction device secondary mixing tank 70, 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 74, enter back extraction device secondary phase splitting device 71 by back extraction device secondary phase splitting device mixed phase inlet 75, in back extraction device secondary phase splitting device 71, realize the layering of mixed phase, what form is light, heavy two-phase, loaded solvent comes out from back extraction device secondary light phase export 76 after removing part phosphoric acid, enters three grades of mixing tanks 78 of back extraction device through three grades of colvent inlets 80 of back extraction device under the effect of pump.Reverse-extraction agent enters three grades of mixing tanks 78 of back extraction device through three grades of reverse-extraction agent inlets 81 of back extraction device, efficient mass transfer effect by three grades of mixing tanks 78 of back extraction device, further improve the molten back extraction effect of load, the mixed phase that forms comes out from three grades of mixed phase fluid outlets 82 of back extraction device, enter three grades of phase-splitting equipment 79 of back extraction device by three grades of phase-splitting equipment of back extraction device mixed phase inlet 83, in three grades of phase-splitting equipment 79 of back extraction device, realize the layering of mixed phase, what form is light, heavy two-phase, loaded solvent comes out from three grades of phase-splitting equipment of back extraction device light phase export 84 after removing part phosphoric acid, return extraction plant under the effect of pump, the phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device secondary mixing tank 70 by back extraction device heavy out 85.

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 three grades of mulsers 19 of extraction plant and three grades of phase-splitting equipment 20 of extraction plant, three grades of mulsers 19 of extraction plant are provided with three grades of mulser inlets 21 of extraction plant and three grades of mulser outlets 22 of extraction plant, three grades of phase-splitting equipment 20 of extraction plant are provided with three grades of mixed phase inlets 23 of extraction plant, three grades of heavy outs 24 of extraction plant and three grades of light phase exports 25 of extraction plant, three grades of phosphoric acid inlets 26 of three grades of mulser inlets 21 of extraction plant and extraction plant and three grades of colvent inlets 27 of extraction plant are connected, and three grades of mixed phase inlets 23 of three grades of mulser outlets 22 of extraction plant and extraction plant are connected; Three grades of colvent inlets 27 of extraction plant secondary light phase export 16 and extraction plant are connected, and three grades of heavy outs 24 of extraction plant are connected with extraction plant secondary phosphoric acid inlet 17, and three grades of light phase exports 25 of extraction plant are connected with washing device one-level colvent inlet 36;

Washing device comprises washing device mulser B53 and washing device phase splitting device D54, washing device mulser B53 is provided with washing device mulser B inlet 55, washing device mulser B outlet 56, washing device phase splitting device D54 is provided with washing device phase splitting device D mixed phase inlet 57, washing device phase splitting device D heavy out 59 and washing device phase splitting device D light phase export 58, three grades of phosphoric acid inlets of washing device mulser B inlet 55 and washing device 60 are connected with three grades of colvent inlets 61 of washing device, and washing device mulser B exports 56 and enters the mouth with washing device phase splitting device D mixed phase and 57 to be connected; Three grades of colvent inlets 61 of washing device phase splitting device B light phase export 43 and washing device are connected, washing device phase splitting device D heavy out 59 is connected with washing device mixing tank A dispersed phase fluid inlet 40, and washing device phase splitting device D light phase export 58 is connected with back extraction device one-level colvent inlet 64;

At washing device, the phosphoric acid that washing device phase splitting device D heavy out 59 comes out returns washing device mixing tank A37 under the effect of pump; Loaded solvent from washing device phase splitting device B light phase export 43 come out, under the effect of pump through three grades of colvent inlets 61 of washing device, washing acid (purifying phosphoric acid) enters washing device mulser B53 through three grades of phosphoric acid of washing device inlet 60 by washing device mulser B inlet 55; The mixed phase that forms comes out from washing device mulser B outlet 56, enter washing device phase splitting device D54 by washing device phase splitting device D mixed phase inlet 57, in washing device phase splitting device D54, realize the layering of mixed phase, form light, heavy two-phase, loaded solvent comes out to enter back extraction device from washing device phase splitting device D light phase export 58 after being washed pickling impurity removal matter; Heavy phase is then returned washing device mixing tank A37 by washing device phase splitting device D heavy out 59, with washing device mixing tank A continuous phase fluid inlet 39 loaded solvents that enter, efficient mass transfer effect by washing device mixing tank A37, the mixed phase that forms comes out from washing device mixing tank A mixed phase fluid outlet 41, enter washing device phase splitting device B38 by washing device phase splitting device B mixed phase inlet 42, in washing device phase splitting device B38, realize the layering of mixed phase, form light, heavy two-phase, loaded solvent enters washing device mulser B53 from washing device phase splitting device B light phase export 43, heavy phase then enters the mouth 35 from washing device mulser A phosphoric acid by washing device phase splitting device B heavy out 44 under the effect of pump, loaded solvent from extraction plant all enters washing device mulser A28 by washing device mulser A inlet 30 from washing device mulser A colvent inlet 36, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device mulser A28, the mixed phase that forms comes out from washing device mulser A outlet 31, enters washing device phase splitting device A29 by washing device phase splitting device A mixed phase inlet 32; In washing device phase splitting device A29, 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 phase splitting device A heavy out 33; Loaded solvent comes out from washing device phase splitting device A light phase export 34, enters washing device mixing tank A37 through washing device mixing tank A continuous phase fluid inlet 39 under the effect of pump.

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 CN1658807A, 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 secondary light phase export (16) is connected with washing device mulser A colvent inlet (36), washing device phase splitting device B light phase export (43) is connected with back extraction device one-level colvent inlet (64), and back extraction device secondary light phase export (76) is connected with extraction plant one-level colvent inlet (9);

Extraction plant comprises extraction plant one-level mulser (1) and extraction plant one-level phase splitting device (2), extraction plant secondary mulser (10) and extraction plant secondary phase splitting device (11), extraction plant one-level mulser (1) is provided with extraction plant one-level mulser inlet (3) and extraction plant one-level mulser outlet (4), extraction plant one-level phase splitting device (2) is provided with extraction plant one-level mixed phase inlet (5), extraction plant one-level heavy out (6) and extraction plant one-level light phase export (7), extraction plant one-level mulser inlet (3) is connected with extraction plant one-level phosphoric acid inlet (8) and extraction plant one-level colvent inlet (9), and extraction plant one-level mulser outlet (4) is connected with extraction plant one-level mixed phase inlet (5); Extraction plant secondary mulser (10) is provided with extraction plant secondary mulser inlet (12) and extraction plant secondary mulser outlet (13), extraction plant secondary phase splitting device (11) is provided with extraction plant secondary mixed phase inlet (14), extraction plant secondary heavy out (15) and extraction plant secondary light phase export (16), extraction plant secondary mulser inlet (12) is connected with extraction plant secondary phosphoric acid inlet (17) and extraction plant secondary solvent inlet (18), and extraction plant secondary mulser outlet (13) is connected with extraction plant secondary mixed phase inlet (14); Extraction plant one-level light phase export (7) is connected with extraction plant secondary solvent inlet (18), and extraction plant secondary heavy out (15) is connected with extraction plant one-level phosphoric acid inlet (8);

Washing device comprises washing device mulser A (28) and washing device phase splitting device A (29), washing device mixing tank A (37) and washing device phase splitting device B (38), washing device mulser A (28) is provided with washing device mulser A inlet (30), washing device mulser A exports (31), washing device phase splitting device A (29) is provided with washing device phase splitting device A mixed phase inlet (32), washing device phase splitting device A heavy out (33) and washing device phase splitting device A light phase export (34), washing device mulser A inlet (30) is connected with washing device one-level colvent inlet (36) with washing device one-level phosphoric acid inlet (35), and washing device mulser A outlet (31) is connected with washing device phase splitting device A mixed phase inlet (32); Washing device mixing tank A (37) is provided with washing device mixing tank A continuous phase fluid inlet (39), washing device mixing tank A dispersed phase fluid inlet (40) and washing device mixing tank A mixed phase fluid outlet (41), washing device phase splitting device B (38) is provided with washing device phase splitting device B mixed phase inlet (42), washing device phase splitting device B light phase export (43) and washing device phase splitting device B heavy out (44), and washing device mixing tank A mixed phase fluid outlet (41) is connected with washing device phase splitting device B mixed phase inlet (42); Washing device phase splitting device A light phase export (34) is connected with washing device mixing tank A continuous phase fluid inlet (39), and washing device phase splitting device B heavy out (44) is connected with washing device one-level phosphoric acid inlet (35);

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

2. phosphoric acid purification device as claimed in claim 1, it is characterized in that: extraction plant comprises three grades of mulsers of extraction plant (19) and three grades of phase-splitting equipment of extraction plant (20), three grades of mulsers of extraction plant (19) are provided with three grades of mulser inlets of extraction plant (21) and three grades of mulser outlets of extraction plant (22), three grades of phase-splitting equipment of extraction plant (20) are provided with three grades of mixed phase inlets of extraction plant (23), three grades of light phase exports of three grades of heavy outs of extraction plant (24) and extraction plant (25), three grades of mulser inlets of extraction plant (21) are connected with three grades of phosphoric acid inlets of extraction plant (26) and three grades of colvent inlets of extraction plant (27), and three grades of mulser outlets of extraction plant (22) are connected with three grades of mixed phase inlets of extraction plant (23); Extraction plant secondary light phase export (16) is connected with three grades of colvent inlets of extraction plant (27), three grades of heavy outs of extraction plant (24) are connected with extraction plant secondary phosphoric acid inlet (17), and three grades of light phase exports of extraction plant (25) are connected with washing device one-level colvent inlet (36);

Washing device comprises washing device mixing tank B (45) and washing device phase splitting device C (46), washing device mixing tank B (45) is provided with washing device mixing tank B continuous phase fluid inlet (47), washing device mixing tank B dispersed phase fluid inlet (48) and washing device mixing tank B mixed phase fluid outlet (49), washing device phase splitting device C (46) is provided with washing device phase splitting device C mixed phase inlet (50), washing device phase splitting device C light phase export (51) and washing device phase splitting device C heavy out (52), washing device mixing tank B mixed phase fluid outlet (49) is connected with washing device phase splitting device C mixed phase inlet (50); Washing device phase splitting device B light phase export (43) is connected with washing device mixing tank B continuous phase fluid inlet (47), washing device phase splitting device C heavy out (52) is connected with washing device mixing tank A dispersed phase fluid inlet (40), and washing device phase splitting device C light phase export (51) is connected with back extraction device one-level colvent inlet (64);

Back extraction device comprises three grades of mixing tanks of back extraction device (78) and three grades of phase-splitting equipment of back extraction device (79), three grades of mixing tanks of back extraction device (78) are provided with three grades of colvent inlets of back extraction device (80), three grades of mixed phase fluid outlets of three grades of reverse-extraction agent inlets of back extraction device (81) and back extraction device (82), three grades of phase-splitting equipment of back extraction device (79) are provided with three grades of mixed phase inlets of back extraction device (83), three grades of light phase exports of three grades of heavy outs of back extraction device (85) and back extraction device (84), three grades of mixed phase fluid outlets of back extraction device (82) are connected with three grades of mixed phase inlets of back extraction device (83); Back extraction device secondary light phase export (76) is connected with three grades of colvent inlets of back extraction device (80), three grades of heavy outs of back extraction device (85) are connected with back extraction device secondary reverse-extraction agent inlet (73), and three grades of light phase exports of back extraction device (84) are connected with extraction plant one-level colvent inlet (9).

3. phosphoric acid purification device as claimed in claim 1, it is characterized in that: extraction plant comprises three grades of mulsers of extraction plant (19) and three grades of phase-splitting equipment of extraction plant (20), three grades of mulsers of extraction plant (19) are provided with three grades of mulser inlets of extraction plant (21) and three grades of mulser outlets of extraction plant (22), three grades of phase-splitting equipment of extraction plant (20) are provided with three grades of mixed phase inlets of extraction plant (23), three grades of light phase exports of three grades of heavy outs of extraction plant (24) and extraction plant (25), three grades of mulser inlets of extraction plant (21) are connected with three grades of phosphoric acid inlets of extraction plant (26) and three grades of colvent inlets of extraction plant (27), and three grades of mulser outlets of extraction plant (22) are connected with three grades of mixed phase inlets of extraction plant (23); Extraction plant secondary light phase export (16) is connected with three grades of colvent inlets of extraction plant (27), three grades of heavy outs of extraction plant (24) are connected with extraction plant secondary phosphoric acid inlet (17), and three grades of light phase exports of extraction plant (25) are connected with washing device one-level colvent inlet (36);

Washing device comprises washing device mulser B (53) and washing device phase splitting device D (54), washing device mulser B (53) is provided with washing device mulser B inlet (55), washing device mulser B exports (56), washing device phase splitting device D (54) is provided with washing device phase splitting device D mixed phase inlet (57), washing device phase splitting device D heavy out (59) and washing device phase splitting device D light phase export (58), washing device mulser B inlet (55) is connected with three grades of colvent inlets of washing device (61) with three grades of phosphoric acid inlets of washing device (60), and washing device mulser B outlet (56) is connected with washing device phase splitting device D mixed phase inlet (57); Washing device phase splitting device B light phase export (43) is connected with three grades of colvent inlets of washing device (61), washing device phase splitting device D heavy out (59) is connected with washing device mixing tank A dispersed phase fluid inlet (40), and washing device phase splitting device D light phase export (58) is connected with back extraction device one-level colvent inlet (64);

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

5. as the described phosphoric acid purification device of one of claim 1-3, wherein: mulser divides mulser for the pipeline high-shear.