CN201427861Y

CN201427861Y - Phosphoric acid purification device

Info

Publication number: CN201427861Y
Application number: CN2009201254847U
Authority: CN
Inventors: 王邵东; 李红林; 骆广生; 闵胜益
Original assignee: Wengfu Group Co Ltd
Current assignee: Wengfu Group Co Ltd
Priority date: 2009-06-24
Filing date: 2009-06-24
Publication date: 2010-03-24
Anticipated expiration: 2019-06-24

Abstract

The utility model discloses a phosphoric acid purification device which comprises an extraction device, a cleaning device and a back-extraction device, wherein the extraction device and the cleaning device select a single stage formed by a group of emulsifying machines and phase separation facilities, or multiple stages formed by combining multiple groups of emulsifying machines and phase separation facilities; the back-extraction device selects a single stage formed by a group of mixers and phase separation facilities, or multiple stages formed by combining multiple groups of mixers and phaseseparation facilities; a one-stage solvent inlet of the extraction device is connected with a light phase outlet of a final-stage phase separation facility of the back-extraction device; a one-stagesolvent inlet of the cleaning device is connected with a light phase outlet of a final-stage phase separation facility of the extraction device; and a continuous phase fluid inlet of the back-extraction device is connected with a light phase outlet of a final-stage phase separation facility of the cleaning device. Due to the adoption of the phosphoric acid purification device, the mass transfer performance can be enhanced, the purification efficiency is improved, the facility investment and the operation cost are reduced, and the occupied area is small.

Description

Phosphoric acid purification device

Technical field

The utility model relates to this chemical industry equipment field, relates in particular to a kind of phosphoric acid purification device.

Background technology

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

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

Mixing tank has important application in numerous hybrid reactions fields such as chemistry, chemical industry, petrochemical industry, medicine and food.This equipment mass transfer area is big, the reaction conversion ratio height; Cost of equipment is low, and is simple to operate; Regulate single passage width and parallel access volume and accomplish scale production, the device processes amount is big.Chinese patent publication number 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.

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 one-level light phase export is connected with washing device one-level solvent inlet, the phase splitting device light phase export is connected with back extraction device continuous phase fluid inlet in the washing device, and the phase splitting device light phase export in the back extraction device is connected with extraction plant one-level solvent inlet;

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

Washing device comprises washing device one-level mulser and washing device one-level phase splitting device, washing device one-level mulser is provided with mulser import of washing device one-level and the outlet of washing device one-level mulser, washing device one-level phase splitting device is provided with the import of washing device one-level mixed phase, washing device one-level heavy out and washing device one-level light phase export, the import of washing device one-level mulser is connected with washing device one-level detergent inlet and washing device one-level solvent inlet, and the outlet of washing device one-level mulser is connected with the import of washing device one-level mixed phase;

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

Above-mentioned phosphoric acid purification device, wherein: extraction plant one-level light phase export, be connected with the import of extraction plant secondary solvent by the pipeline that is provided with pump, extraction plant secondary heavy out, be connected with the import of extraction plant one-level phosphoric acid by the pipeline that is provided with pump, extraction plant secondary light phase export is connected with washing device one-level solvent inlet; Washing device one-level light phase export, be connected with the secondary solvent import by the pipeline that is provided with pump, washing device secondary heavy out, be connected with washing device one-level detergent inlet by the pipeline that is provided with pump, washing device secondary light phase export and back extraction device continuous phase fluid inlet is connected, and the phase splitting device light phase export in the back extraction device, entering the mouth with back extraction device secondary continuous phase fluid by the pipeline that is provided with pump is connected; The phase splitting device heavy out of secondary phase splitting device, the pipeline by being provided with pump are connected with back extraction device dispersed phase fluid inlet, and the secondary light phase export is connected with extraction plant one-level solvent inlet.

Above-mentioned phosphoric acid purification device, wherein: three grades of solvent inlets of extraction plant secondary light phase export and extraction plant are connected, three grades of heavy outs of extraction plant are connected with the import of extraction plant secondary phosphoric acid by the pipeline that is provided with pump, and three grades of phase-splitting equipment of extraction plant light phase export is connected with washing device one-level solvent inlet; Three grades of solvent inlets of washing device secondary light phase export and washing device are connected, three grades of heavy outs of washing device are connected with washing device secondary detergent inlet by the pipeline that is provided with pump, three grades of phase-splitting equipment of washing device light phase export is connected with back extraction device continuous phase fluid inlet, three grades of continuous phase fluid inlets of secondary light phase export and back extraction device are connected in the back extraction device, three grades of phase-splitting equipment heavy outs are connected with back extraction device secondary dispersed phase fluid inlet, and three grades of phase-splitting equipment light phase exports are connected with extraction plant one-level solvent inlet.

The utility model compared with prior art, as can be known from the above technical solutions, different according to purify requiring, constitute in the phosphoric acid purification device, extraction plant, washing device select for use single-stage that one group of mulser and phase splitting device constitute or by many groups mulser and phase splitting device combine multistage; Back extraction device select for use single-stage that one group of mixing tank and phase splitting device constitute or by multiple mixer and phase splitting device combine multistage.In the phosphoric acid purification process, feed phosphoric acid (fresh phosphoric), washing acid (purifying phosphoric acid) are added by extraction plant final stage mulser respective inlets, washing device final stage mulser respective inlets respectively, and de-salted water is added by back extraction device final stage mixer disperses phase fluid inlet.The no-load solvent of extraction plant one-level solvent inlet is from the light phase export of back extraction device final stage phase splitting device, the loaded solvent of washing device one-level solvent inlet is from the light phase export of extraction plant final stage phase splitting device, and the loaded solvent of back extraction device continuous phase fluid inlet is from the light phase export of washing device final stage phase splitting device.Because the mass transfer area of mulser, mixing tank is big, the mass-transfer efficiency height.Be easy to phase-splitting from the mixed solution that comes out, thereby guarantee 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; And mulser, mixing tank floor space are little, and appliance arrangement is arranged simple, and factory building can be realized miniaturization; Mulser, mixing tank cost are low, can save facility investment.

Description of drawings

Fig. 1 is the single step arrangement synoptic diagram of utility model;

Fig. 2 is the secondary structure synoptic diagram of utility model;

Fig. 3 is the tertiary structure synoptic diagram of utility model.

Mark among the figure:

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

Embodiment

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

Embodiment 1

Referring to Fig. 1, adopt the phosphoric acid purification device of single-stage extraction, washing and back extraction, comprise extraction plant, washing device and back extraction device, wherein: extraction plant one-level light phase export 7 is connected with washing device one-level solvent inlet 36, washing device one-level light phase export 34 is connected with back extraction device continuous phase fluid inlet 57, and back extraction device light phase export 61 is connected with extraction plant one-level solvent inlet 9;

Extraction plant comprises extraction plant one-level mulser 1 and extraction plant one-level phase splitting device 2, extraction plant one-level mulser 1 is provided with extraction plant one-level mulser import 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 import 5, extraction plant one-level heavy out 6 and extraction plant one-level light phase export 7, extraction plant one-level mulser import 3 is connected with extraction plant one-level phosphoric acid import 8 and extraction plant one-level solvent inlet 9, and extraction plant one-level mulser outlet 4 is connected with extraction plant one-level mixed phase import 5;

Washing device comprises washing device one-level mulser 28 and washing device one-level phase splitting device 29, washing device one-level mulser 28 is provided with washing device one-level mulser import 30 and washing device one-level mulser outlet 31, washing device one-level phase splitting device 29 is provided with washing device one-level mixed phase import 32, washing device one-level heavy out 33 and washing device one-level light phase export 34, washing device one-level mulser import 30 is connected with washing device one-level detergent inlet 35 and washing device one-level solvent inlet 36, and washing device one-level mulser outlet 31 is connected with washing device one-level mixed phase import 32;

Back extraction device comprises back extraction device mixing tank 55 and back extraction device phase splitting device 56, back extraction device mixing tank 55 is provided with back extraction device continuous phase fluid inlet 57, back extraction device dispersed phase fluid inlet 58 and back extraction device mixed phase fluid outlet 59, back extraction device phase splitting device 56 is provided with back extraction device mixed phase import 60, back extraction device heavy out 62 and back extraction device light phase export 61, and back extraction device mixed phase fluid outlet 59 is connected with back extraction device mixed phase import 60.

Wherein: mulser adopts the pipeline high-shearing dispersion emulsifying machine, and phase splitting device adopts phase-splitting groove, clarifying tank etc. to reach the equipment of phase-splitting purpose.

During use, phosphoric acid enters extraction plant one-level mulser 1 from extraction plant one-level solvent inlet 9 by extraction plant one-level mulser import 3 from extraction plant one-level phosphoric acid import 8, extraction agent (from the no-load solvent of back extraction device light phase export 61), 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 import 5.In extraction plant one-level phase splitting device 2, realize the layering of mixed phase, light, the heavy two-phase that forms, phosphoric acid is extracted agent extraction to be become loaded solvent and enters washing device from extraction plant one-level light phase export 7, impurity in the phosphoric acid enters heavy phase becomes raffinate from 6 discharges of extraction plant one-level heavy out, thereby realizes extracting and separating.

At washing device, purifying phosphoric acid enters washing device one-level mulser 28 from washing device one-level solvent inlet 36 by washing device one-level mulser import 30 from washing device one-level detergent inlet 35, the loaded solvent that comes from extraction plant, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device one-level mulser 28, the mixed phase that forms comes out from washing device one-level mulser outlet 31, enters washing device one-level phase splitting device 29 by washing device one-level mixed phase import 32.In washing device one-level phase splitting device 29, realize the layering of mixed phase, light, the heavy two-phase that forms, impurity in the loaded solvent enters heavy phase to be become and washes spent acid and discharge from washing device one-level heavy out 33, be washed the loaded solvent that has purified and enter back extraction device, thereby realize washing, purifying from washing device one-level light phase export 34.

At back extraction device, de-salted water is from back extraction device dispersed phase fluid inlet 58, enter back extraction device mixing tank 55 from the loaded solvent of washing device from back extraction device continuous phase fluid inlet 57, loaded solvent and de-salted water are finished the efficient mass transfer process in back extraction device mixing tank 55, the mixed phase that forms comes out from back extraction device mixed phase fluid outlet 59, enters back extraction device phase splitting device 56 by back extraction device mixed phase import 60.In back extraction device phase splitting device 56, realize the layering of mixed phase, light, the heavy two-phase that forms, phosphoric acid in the loaded solvent enters heavy phase becomes purifying phosphoric acid from 62 discharges of back extraction device heavy out, loaded solvent removes and then becomes no-load solvent behind the phosphoric acid and return extraction plant from back extraction device light phase export 61, thereby realizes recycling of extraction agent.

Embodiment 2

Referring to Fig. 2, adopt the phosphoric acid purification device of secondary extraction, washing and back extraction, comprise extraction plant, washing device and back extraction device, wherein: extraction plant one-level light phase export 7, be connected with extraction plant secondary solvent import 18 by the pipeline that is provided with pump, extraction plant secondary heavy out 15, be connected with extraction plant one-level phosphoric acid import 8 by the pipeline that is provided with pump, extraction plant secondary light phase export 16 is connected with washing device one-level solvent inlet 36; Washing device one-level light phase export 34 is connected with secondary solvent import 45 by the pipeline that is provided with pump, washing device secondary heavy out 42 is connected with washing device one-level detergent inlet 35 by the pipeline that is provided with pump, and washing device secondary light phase export 43 is connected with back extraction device continuous phase fluid inlet 57; Back extraction device light phase export 61, the pipeline by being provided with pump and back extraction device secondary continuous phase fluid inlet 65 are connected; Back extraction device secondary heavy out 70, the pipeline by being provided with pump and back extraction device dispersed phase fluid inlet 58 are connected, and back extraction device secondary light phase export 69 is connected with extraction plant one-level solvent inlet 9.All the other are with embodiment 1.

During use, the phosphoric acid that extraction plant secondary heavy out 15 comes out, under the effect of pump, enter extraction plant one-level mulser 1 from extraction plant one-level solvent inlet 9 by extraction plant one-level mulser import 3 from extraction plant one-level phosphoric acid import 8, extraction agent (from the no-load solvent of back extraction device secondary light phase export 69), 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 import 5.In extraction plant one-level 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 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 import 18 by extraction plant secondary mulser import 12 under the effect of pump.Feed phosphoric acid (fresh phosphoric) enters extraction plant secondary mulser 10 through extraction plant secondary phosphoric acid import 17 by extraction plant secondary mulser import 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 import 14, in extraction plant secondary phase splitting device 11, realize the layering of mixed phase, what form is light, heavy two-phase, most of phosphoric acid is extracted the agent extraction and enters and gently form loaded solvent mutually and enter washing device from extraction plant 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 washing device secondary heavy out 42 comes out, under the effect of pump, enter washing device one-level mulser 28 from washing device one-level solvent inlet 36 by washing device one-level mulser import 30 from washing device one-level detergent inlet 35, the loaded solvent that comes from extraction plant, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device one-level mulser 28, the mixed phase that forms comes out from washing device one-level mulser outlet 31, enters washing device one-level phase splitting device 29 by washing device one-level mixed phase import 32.In washing device one-level phase splitting device 29, realize the layering of mixed phase, light, the heavy two-phase of formation.Impurity in the loaded solvent enters heavy phase to be become and washes spent acid and discharge from washing device one-level heavy out 33, be washed the loaded solvent that has purified and come out, under the effect of pump, enter washing device secondary mulser 37 by washing device secondary mulser import 39 through washing device secondary solvent import 45 from washing device one-level light phase export 34.Washing acid (purifying phosphoric acid) enters washing device secondary mulser 37 through washing device secondary detergent inlet 44 by washing device secondary mulser import 39, efficient mass transfer effect by washing device secondary mulser 37, further improve the molten washing effect of load, the mixed phase that forms comes out from washing device secondary mulser outlet 40, enter washing device secondary phase splitting device 38 by washing device secondary mixed phase import 41, in two washing device secondary phase splitting devices 38, realize the layering of mixed phase, what form is light, heavy two-phase, be washed the loaded solvent that has purified and enter back extraction device from washing device secondary light phase export 43, impurity in the loaded solvent enters heavy phase and returns washing device one-level mulser 28 by washing device secondary heavy out 42, thereby realizes washing, purifying.

At back extraction device, the phosphoric acid that back extraction device back extraction device secondary heavy out 70 comes out, the loaded solvent that return back extraction device back extraction device dispersed phase fluid inlet 58 under the effect of pump, comes from washing device enters back extraction device mixing tank 55 from back extraction device continuous phase fluid inlet 57, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mixing tank 55, the mixed phase that forms comes out from back extraction device mixed phase fluid outlet 59, enters back extraction device phase splitting device 56 by back extraction device mixed phase import 60.In back extraction device phase splitting device 56, 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 62 discharges of back extraction device heavy out, the loaded solvent of being taken off part phosphoric acid comes out from back extraction device light phase export 61, enters back extraction device secondary mixing tank 63 through back extraction device secondary continuous phase fluid inlet 65 under the effect of pump.De-salted water enters back extraction device secondary mixing tank 63 through back extraction device secondary dispersed phase fluid inlet 66, efficient mass transfer effect by back extraction device secondary mixing tank 63, 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 67, enter back extraction device secondary phase splitting device 64 by back extraction device secondary mixed phase import 68, in back extraction device secondary phase splitting device 64, 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 69, and the phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device mixing tank 55 by back extraction device heavy out 70.

Embodiment 3

Referring to Fig. 3, adopt the phosphoric acid purification device of three grades of extractions, washing and back extractions, comprise extraction plant, washing device and back extraction device, three grades of solvent inlets 27 of extraction plant secondary light phase export 16 and extraction plant are connected, three grades of heavy outs 24 of extraction plant, be connected with extraction plant secondary phosphoric acid import 17 by the pipeline that is provided with pump, three grades of phase-splitting equipment of extraction plant light phase export 25 is connected with washing device one-level solvent inlet 36;

Three grades of solvent inlets 54 of washing device secondary light phase export 43 and washing device are connected, three grades of heavy outs 51 of washing device are connected with washing device secondary detergent inlet 44 by the pipeline that is provided with pump, three grades of phase-splitting equipment of washing device light phase export 52 is connected with back extraction device continuous phase fluid inlet 57, three grades of continuous phase fluid inlets 73 of back extraction device secondary light phase export 69 and back extraction device are connected, three grades of heavy outs 78 of back extraction device are connected with back extraction device secondary dispersed phase fluid inlet 66, and three grades of light phase exports 77 of back extraction device are connected with extraction plant one-level solvent inlet 9.All the other are with embodiment 2.

During use, the phosphoric acid that three grades of heavy outs 24 of extraction plant come out returns extraction plant secondary mulser 10 under the effect of pump; Loaded solvent comes out from extraction plant secondary light phase export 16, under the effect of pump, enter three grades of mulsers 19 of extraction plant through three grades of phosphoric acid imports 26 of extraction plant by three grades of mulser imports 21 of extraction plant through three grades of solvent inlets 27 of extraction plant, feed phosphoric acid (fresh phosphoric), efficient mass transfer effect by multistage mulser has improved the phosphoric acid extraction rate as much as possible; 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 imports 23 of extraction plant, in three grades of phase-splitting equipment 20 of extraction plant, realize the layering of mixed phase, light, the heavy two-phase that forms, most of phosphoric acid is extracted the agent extraction and enters and gently form loaded solvent mutually and come out to enter washing device from three grades of light phase exports of extraction plant 25, 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, loaded solvent comes out from washing device secondary light phase export 43, enters washing device three grade mulsers 46 through three grades of detergent inlet 53 of washing device by three grades of mulser imports 48 of washing device through three grades of solvent inlets 54 of washing device, washing acid (purifying phosphoric acid) under the effect of pump.Efficient mass transfer effect by multistage mulser has improved the phosphoric acid washing effect as much as possible; The mixed phase that forms comes out from three grades of mulser outlets 49 of washing device, enter three grades of phase-splitting equipment 47 of washing device by three grades of mixed phase imports 50 of washing device, in three grades of phase-splitting equipment 47 of washing device, realize the layering of mixed phase, light, the heavy two-phase that forms, be washed the loaded solvent that has purified and come out to enter back extraction device from three grades of light phase exports of washing device 52, the impurity in the loaded solvent enters heavy phase and returns washing device secondary mulser 37 by three grades of heavy outs 51 of washing device.By three grades of washings, the impurity major part in the loaded solvent is entered heavy phase by phosphoric acid washing and finally discharges from washing device one-level heavy out 33, thereby realizes washing, purifying.

At back extraction device, the phosphoric acid that back extraction device back extraction device secondary heavy out 70 comes out, the loaded solvent that return back extraction device back extraction device dispersed phase fluid inlet 58 under the effect of pump, comes from washing device enters back extraction device mixing tank 55 from back extraction device continuous phase fluid inlet 57, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mixing tank 55, the mixed phase that forms comes out from back extraction device mixed phase fluid outlet 59, enters back extraction device phase splitting device 56 by back extraction device mixed phase import 60.In back extraction device phase splitting device 56, 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 62 discharges of back extraction device heavy out, the loaded solvent of being taken off part phosphoric acid comes out from back extraction device light phase export 61, enters back extraction device mixing tank 63 through back extraction device secondary continuous phase fluid inlet 65 under the effect of pump.The phosphoric acid that three grades of heavy outs 78 of back extraction device come out, under the effect of pump, return back extraction device secondary mixing tank 63, efficient mass transfer effect by back extraction device secondary mixing tank 63, the mixed phase that forms comes out from back extraction device secondary mixed phase fluid outlet 67, enter back extraction device secondary phase splitting device 64 by back extraction device secondary mixed phase import 68, in back extraction device secondary phase splitting device 64, realize the layering of mixed phase, light, the heavy two-phase that forms, the phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device mixing tank 55 by back extraction device heavy out 70.The loaded solvent that also contains part phosphoric acid comes out from back extraction device secondary light phase export 69, under the effect of pump, disperse phase fluid inlet 74 to enter three grades of mixing tanks 71 of back extraction device through three grades of back extraction devices through three grades of continuous phase fluid inlets 73 of back extraction device, de-salted water, by the efficient mass transfer effect of multistage back extraction device mixing tank, improved phosphoric acid back extraction effect as much as possible; The mixed phase that forms comes out from three grades of mixed phase fluid outlets 75 of back extraction device, enter three grades of phase-splitting equipment 72 of back extraction device by three grades of mixed phase imports 76 of back extraction device, in three grades of phase-splitting equipment 72 of back extraction device, realize the layering of mixed phase, light, the heavy two-phase that forms, loaded solvent removes and then becomes no-load solvent behind the phosphoric acid and come out to return extraction plant from three grades of light phase exports of back extraction device 77, and the phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device secondary mixing tank 63 by three grades of heavy outs 78 of back extraction device.By three grades of back extractions, the phosphoric acid in the loaded solvent is desalted the water back extraction and enters heavy phase finally from the discharge of back extraction device phase splitting device heavy phase mouth, becomes purifying phosphoric acid.All the other principle of work are with embodiment 2.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, any technical solutions of the utility model content that do not break away from,, all still belong in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present utility model.

Claims

1, a kind of phosphoric acid purification device, comprise extraction plant, washing device and back extraction device, it is characterized in that: extraction plant one-level light phase export (7) is connected with washing device one-level solvent inlet (36), washing device one-level light phase export (34) is connected with back extraction device continuous phase fluid inlet (57), and back extraction device light phase export (61) is connected with extraction plant one-level solvent inlet (9);

Extraction plant comprises extraction plant one-level mulser (1) and extraction plant one-level phase splitting device (2), extraction plant one-level mulser (1) is provided with extraction plant one-level mulser import (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 import (5), extraction plant one-level heavy out (6) and extraction plant one-level light phase export (7), extraction plant one-level mulser import (3) is connected with extraction plant one-level phosphoric acid import (8) and extraction plant one-level solvent inlet (9), and extraction plant one-level mulser outlet (4) is connected with extraction plant one-level mixed phase import (5);

Washing device comprises washing device one-level mulser (28) and washing device one-level phase splitting device (29), washing device one-level mulser (28) is provided with washing device one-level mulser import (30) and washing device one-level mulser outlet (31), washing device one-level phase splitting device (29) is provided with washing device one-level mixed phase import (32), washing device one-level heavy out (33) and washing device one-level light phase export (34), washing device one-level mulser import (30) is connected with washing device one-level detergent inlet (35) and washing device one-level solvent inlet (36), and washing device one-level mulser outlet (31) is connected with washing device one-level mixed phase import (32);

Back extraction device comprises back extraction device mixing tank (55) and back extraction device phase splitting device (56), back extraction device mixing tank (55) is provided with back extraction device continuous phase fluid inlet (57), back extraction device dispersed phase fluid inlet (58) and back extraction device mixed phase fluid outlet (59), back extraction device phase splitting device (56) is provided with back extraction device mixed phase import (60), back extraction device heavy out (62) and back extraction device light phase export (61), and back extraction device mixed phase fluid outlet (59) is connected with back extraction device mixed phase import (60).

2, phosphoric acid purification device as claimed in claim 1, it is characterized in that: extraction plant one-level light phase export (7) is connected with extraction plant secondary solvent import (18) by pipeline, extraction plant secondary heavy out (15) is connected with extraction plant one-level phosphoric acid import (8) by pipeline, and extraction plant secondary light phase export (16) is connected with washing device one-level solvent inlet (36);

Washing device one-level light phase export (34) is connected with secondary solvent import (45) by pipeline, washing device secondary heavy out (42), be connected with washing device one-level detergent inlet (35) by pipeline, washing device secondary light phase export (43) back extraction device continuous phase fluid inlet (57) connects;

Back extraction device light phase export (61) is connected with back extraction device secondary continuous phase fluid inlet (65) by pipeline; Back extraction device secondary heavy out (70), be connected by pipeline and back extraction device dispersed phase fluid inlet (58), back extraction device secondary light phase export (69) is connected with extraction plant one-level solvent inlet (9).

3, phosphoric acid purification device as claimed in claim 2, it is characterized in that: extraction plant secondary light phase export (16) is connected with three grades of solvent inlets of extraction plant (27), three grades of heavy outs of extraction plant (24) are connected with extraction plant secondary phosphoric acid import (17) by pipeline, and three grades of phase-splitting equipment of extraction plant light phase export (25) is connected with washing device one-level solvent inlet (36);

Washing device secondary light phase export (43) is connected with three grades of solvent inlets of washing device (54), three grades of heavy outs of washing device (51) are connected with washing device secondary detergent inlet (44) by pipeline, and three grades of phase-splitting equipment of washing device light phase export (52) back extraction device continuous phase fluid inlet (57) connects;

Back extraction device secondary light phase export (69) is connected with three grades of continuous phase fluid inlets of back extraction device (73), three grades of heavy outs of back extraction device (78) are connected with back extraction device secondary dispersed phase fluid inlet (66), and three grades of light phase exports of back extraction device (77) are connected with extraction plant one-level solvent inlet (9).