CN201762105U

CN201762105U - Phosphoric acid purifying device

Info

Publication number: CN201762105U
Application number: CN2010205110698U
Authority: CN
Inventors: 王邵东; 王平; 吕阳成; 孙应伦
Original assignee: Wengfu Group Co Ltd
Current assignee: Wengfu Group Co Ltd
Priority date: 2010-08-31
Filing date: 2010-08-31
Publication date: 2011-03-16
Anticipated expiration: 2020-08-31

Abstract

The utility model discloses a phosphoric acid purifying device. The device comprises an extraction device, a cleaning device and a back extraction device; the extraction device selects a pulsed sieve plate column as a mass transfer device; the cleaning device selects a two-stage device formed by two groups of mixers and phase splitting devices or a multistage device formed by a plurality of groups of mixers and phase splitting devices; the back extraction device comprises a group of emulsifying machines and phase splitting devices and a group of mixers and phase splitting devices, or also comprises a group or a plurality groups of emulsifying machines and phase splitting devices (or mixers and phase splitting devices); the light phase inlet of the sieve plate column of the extraction device is connected with the light phase outlet of the last-stage phase splitting device of the back extraction device; the continuous phase fluid inlet of the cleaning device is connected with the light phase outlet of the sieve plate column of the extraction device; and the first-stage solvent inlet of the back extraction device is connected with the light phase outlet of the last-stage phase splitting device of the cleaning device. The device has the advantages of intensified mass transfer performance, improvement in purifying efficiency, reduction of investment in equipment and running cost and less occupied space.

Description

Phosphoric acid purification device

Technical field

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

Background technology

Realize that with solvent extraction technology phosphoric acid purification is a phosphoric acid purification technology commonly used at present, solvent extraction technology generally comprises extraction, washing, reaches the back extraction operation.The chemical industry equipment that can realize extraction, washing, back extraction function at present is mainly as follows: multistage mixing-clarifying tank, it is a kind of typically contact liquid liquid mass transfer apparatus step by step, wherein every grade comprises mixing tank and clarifying tank two portions, this equipment main drawback has: horizontal multistage mixing-tempering tank floor space is bigger, be equipped with whipping appts in each level, fluid generally needs to use pump delivery flowing of inter-stage, and cost of equipment and process cost are all bigger; Pulse plate ring tower and oscillating screen plate tower, pulse plate ring tower need be done the tower body size very big in order to reach higher mass transfer effect, needs to fill a large amount of materials when carrying out production operation in the tower, and system's start-stop car time is long, and it is big that spillage risk takes place; And sieve plate is fixed on the central shaft in the oscillating screen plate tower, is driven by toggle, and this tower is limited by equipment material, the equipment failure rate height, and working cost is higher.For addressing the above problem, Chinese patent publication number CN2325567 discloses a kind of " sieve-tray tower that is used for pulse extraction " on 02 20th, 2002, but it can only finish mixed processes, material goes out also need enter proprietary phase splitting device behind the tower and carry out phase-splitting, and system device is many, and sieve diameter is too little, when being used for the phosphoric acid by wet process extraction, cause clogging of screen easily because of there being more precipitation to separate out, inconvenient operation is unfavorable for the phosphoric acid by wet process extraction.

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 CN1571427A, disclosed on 02 22nd, 2006 " a kind of multi-channeled micro-structured reactor ", continuous phase fluid enters reactor from the inlet tube distribution chamber in this reactor, dispersed phase fluid is passed dispersion medium and is entered the external phase parallel channels, under continuous phase fluid flows shear action, be dispersed into fine droplet or bubble, contact, realize short mix and reaction between two-phase fluid with continuous phase fluid.

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

Summary of the invention

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

A kind of phosphoric acid purification device of the present utility model, comprise extraction plant, washing device and back extraction device, wherein: extraction plant sieve-tray tower light phase export is connected with washing device continuous phase fluid inlet, washing device secondary light phase export is connected with the back extraction device solvent inlet, and back extraction device phase splitting device B light phase export connects with the light import mutually of extraction plant sieve-tray tower;

Extraction plant comprises sieve-tray tower and surge generator, and sieve-tray tower is made of the last clarifying chamber at top, the body of the tower at middle part and the following clarifying chamber of bottom, and it is some that sieve plate is housed in the body of the tower; Last clarifying chamber is provided with heavy phase import of extraction plant sieve-tray tower and extraction plant sieve-tray tower light phase export, and the heavy phase distribution plate in the import of extraction plant sieve-tray tower heavy phase and the body of the tower is communicated with; Following clarifying chamber is provided with the light phase import of extraction plant sieve-tray tower, the peripheral hardware liquidometer, and the bottom is provided with extraction plant sieve-tray tower raffinate relief outlet, light phase import of extraction plant sieve-tray tower and the interior light connection of distribution plate mutually of body of the tower; Surge generator is connected with following clarifying chamber;

Washing device comprises washing device mixing tank and washing device phase splitting device, washing device secondary mixing tank and washing device secondary phase splitting device, the washing device mixing tank is provided with washing device continuous phase fluid inlet, washing device dispersed phase fluid inlet and the outlet of washing device mixed phase fluid, the washing device phase splitting device is provided with the import of washing device mixed phase, washing device heavy out and washing device light phase export, and the outlet of washing device mixed phase fluid is connected with the import of washing device mixed phase; Washing device secondary mixing tank is provided with washing device secondary continuous phase fluid inlet, washing device secondary dispersed phase fluid inlet and the outlet of washing device secondary mixed phase fluid, washing device secondary phase splitting device is provided with the import of washing device secondary mixed phase, washing device secondary heavy out and washing device secondary light phase export, and the outlet of washing device secondary mixed phase fluid is connected with the import of washing device secondary mixed phase; The washing device light phase export is connected with washing device secondary continuous phase fluid inlet, and washing device secondary heavy out is connected with washing device dispersed phase fluid inlet;

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

Above-mentioned phosphoric acid purification device, wherein: washing device comprises three grades of mixing tanks of washing device and three grades of phase-splitting equipment of washing device, three grades of mixing tanks of washing device are provided with three grades of continuous phase fluid inlets of washing device, washing device disperses phase fluid inlet and three grades of mixed phase fluid outlets of washing device for three grades, three grades of phase-splitting equipment of washing device are provided with three grades of mixed phase imports of washing device, three grades of heavy outs of washing device and three grades of light phase exports of washing device, and three grades of mixed phase fluid outlets of washing device are connected with three grades of mixed phase imports of washing device; Three grades of continuous phase fluid inlets of washing device secondary light phase export and washing device are connected, and three grades of heavy outs of washing device are connected with washing device secondary dispersed phase fluid inlet, and three grades of light phase exports of washing device are connected with the back extraction device solvent inlet;

Back extraction device comprises back extraction device mulser B and back extraction device phase splitting device C, back extraction device mulser B is provided with back extraction device mulser B import, back extraction device mulser B outlet, back extraction device phase splitting device C is provided with the import of back extraction device phase splitting device C mixed phase, back extraction device phase splitting device C heavy out and back extraction device phase splitting device C light phase export, three grades of phosphoric acid imports of back extraction device mulser B import and back extraction device are connected with three grades of solvent inlets of back extraction device, and back extraction device mulser B outlet is connected with the import of back extraction device phase splitting device C mixed phase; Three grades of solvent inlets of back extraction device phase splitting device B light phase export and back extraction device are connected, back extraction device phase splitting device C heavy out is connected with back extraction device mixing tank A dispersed phase fluid inlet, and back extraction device phase splitting device C light phase export connects with the light import mutually of extraction plant sieve-tray tower.

Back extraction device comprises back extraction device mixing tank B and back extraction device phase splitting device D, back extraction device mixing tank B is provided with back extraction device mixing tank B continuous phase fluid inlet, back extraction device mixing tank B dispersed phase fluid inlet and the outlet of back extraction device mixing tank B mixed phase fluid, back extraction device phase splitting device D is provided with the import of back extraction device phase splitting device D mixed phase, back extraction device phase splitting device D light phase export and back extraction device phase splitting device D heavy out, and the outlet of back extraction device mixing tank B mixed phase fluid is connected with the import of back extraction device phase splitting device D mixed phase; Back extraction device phase splitting device B light phase export is connected with back extraction device mixing tank B continuous phase fluid inlet, back extraction device phase splitting device D heavy out is connected with back extraction device mixing tank A dispersed phase fluid inlet, and back extraction device phase splitting device D light phase export connects with the light import mutually of extraction plant sieve-tray tower.

Above-mentioned phosphoric acid purification device, wherein: sieve diameter is 7-18mm.

The utility model compared with prior art as can be known from the above technical solutions, requires difference according to purifying, and extraction plant selects for use pulsed sieve plate column as mass transfer apparatus; Washing device select for use secondary that two groups of mixing tanks and phase splitting device constitute or by multiple mixer and phase splitting device combine multistage; Back extraction device comprises one group of mulser and phase splitting device and one group of mixing tank and phase splitting device, or increases one or more groups mulser and phase splitting device (or mixing tank and phase splitting device) on aforesaid combination.In the phosphoric acid purification process, feed phosphoric acid (fresh phosphoric) is added by the import of extraction plant sieve-tray tower heavy phase, washing acid (purifying phosphoric acid), de-salted water is entered the mouth by washing device final stage mixer disperses phase fluid, back extraction device final stage reverse-extraction agent import (or mixer disperses phase fluid inlet) adds, the no-load solvent of the light phase import of extraction plant sieve-tray tower is from the light phase export of back extraction device final stage phase splitting device, the loaded solvent of washing device continuous phase fluid inlet is from extraction plant sieve-tray tower light phase export, and the loaded solvent of back extraction device solvent inlet is from the light phase export of washing device final stage phase splitting device.As can be known from the above technical solutions, add surge generator because of adopting sieve-tray tower, contact with material in the tower as pulsating medium with air, and surge generator does not directly contact with material, paired pulses generation equipment material is less demanding, and equipment amplifies easily; Sieve plate can effectively improve the material contact surface, the lift technique mass-transfer performance, thus can reduce equipment size, promptly can reduce the fill material amount, reduce system's start-stop car time; The design of clarifying chamber has up and down realized that mixing and phase-splitting finish in an equipment.Tower lower section sieve diameter and distance between plates can avoid a large amount of solid impurities to cause clogging of screen in the lower panel deposition from bigger than middle part and upper segment, influence mass-transfer efficiency.Sieve diameter can satisfy mass transfer effect in the 7-18mm scope, can reduce to stop up probability again; The liquidometer that connects outside the following clarifying chamber can help operator to understand the system interface changing conditions at any time, and the system of keeping balances each other, and makes things convenient for system to regulate.

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; 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, goes up the clarifying chamber, 2, extraction plant sieve-tray tower light phase export, 3, the import of extraction plant sieve-tray tower heavy phase, 4, the heavy phase distribution plate, 5, body of the tower, 6, sieve plate, 7, light phase distribution plate, 8, liquidometer, 9, following clarifying chamber, 10, extraction plant sieve-tray tower raffinate relief outlet, 11, the light phase import of extraction plant sieve-tray tower, 12, surge generator.13, the washing device mixing tank, 14, the washing device phase splitting device, 15, washing device continuous phase fluid inlet, 16, washing device dispersed phase fluid inlet, 17, the outlet of washing device mixed phase fluid, 18, the import of washing device mixed phase, 19, the washing device light phase export, 20, the washing device heavy out, 21, washing device secondary mixing tank, 22, washing device secondary phase splitting device, 23, washing device secondary continuous phase fluid inlet, 24, washing device secondary dispersed phase fluid inlet, 25, the outlet of washing device secondary mixed phase fluid, 26, the import of washing device secondary mixed phase, 27, washing device secondary light phase export, 28, washing device secondary heavy out, 29, three grades of mixing tanks of washing device, 30, three grades of phase-splitting equipment of washing device, 31, three grades of continuous phase fluid inlets of washing device, 32, washing device disperses the phase fluid inlet for three grades, 33, three grades of mixed phase fluid outlets of washing device, 34, three grades of mixed phase imports of washing device, 35, three grades of light phase exports of washing device, 36, three grades of heavy outs of washing device, 37, back extraction device mulser A, 38, back extraction device phase splitting device A, 39, back extraction device mulser A import, 40, back extraction device mulser A outlet, 41, the import of back extraction device mixed phase, 42, the back extraction device heavy out, 43, the back extraction device light phase export, 44, the import of back extraction device phosphoric acid, 45, the back extraction device solvent inlet, 46, back extraction device mixing tank A, 47, back extraction device phase splitting device B, 48, back extraction device mixing tank A continuous phase fluid inlet, 49, back extraction device mixing tank A dispersed phase fluid inlet, 50, the outlet of back extraction device mixing tank A mixed phase fluid, 51, the import of back extraction device phase splitting device B mixed phase, 52, back extraction device phase splitting device B light phase export, 53, back extraction device phase splitting device B heavy out, 54, back extraction device mulser B, 55, back extraction device phase splitting device C, 56, back extraction device mulser B import, 57, back extraction device mulser B outlet, 58, the import of back extraction device phase splitting device C mixed phase, 59, back extraction device phase splitting device C heavy out, 60, back extraction device phase splitting device C light phase export, 61, three grades of phosphoric acid imports of back extraction device, 62, three grades of solvent inlets of back extraction device, 63, back extraction device mixing tank B, 64, back extraction device phase splitting device D, 65, back extraction device mixing tank B continuous phase fluid inlet, 66, back extraction device mixing tank B dispersed phase fluid inlet, 67, the outlet of back extraction device mixing tank B mixed phase fluid, 68, the import of back extraction device phase splitting device D mixed phase, 69, back extraction device phase splitting device D light phase export, 70, back extraction device phase splitting device D heavy out.

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 secondary washing and back extraction, comprise extraction plant, washing device and back extraction device, wherein: extraction plant sieve-tray tower light phase export 2 is connected with washing device continuous phase fluid inlet 15, washing device secondary light phase export 27 is connected with back extraction device solvent inlet 45, and back extraction device phase splitting device B light phase export 52 connects with the light import mutually 11 of extraction plant sieve-tray tower;

Extraction plant comprises sieve-tray tower and surge generator 12, and sieve-tray tower is made of the last clarifying chamber 1 at top, the body of the tower 5 at middle part and the following clarifying chamber 9 of bottom, and it is some that sieve plate 6 is housed in the body of the tower 5; Last clarifying chamber 1 is provided with extraction plant sieve-tray tower heavy phase import 3 and extraction plant sieve-tray tower light phase export 2, and the heavy phase distribution plate 4 in the import 3 of extraction plant sieve-tray tower heavy phase and the body of the tower 5 is communicated with; Following clarifying chamber 9 is provided with the light phase import 11 of extraction plant sieve-tray tower, peripheral hardware liquidometer 8, and the bottom is provided with extraction plant sieve-tray tower raffinate relief outlet 10, and the light distribution plate mutually 7 in the light phase import 11 of extraction plant sieve-tray tower and the body of the tower 5 is communicated with; Surge generator 12 is connected with following clarifying chamber 9;

The sieve diameter 10-18mm of body of the tower 5 hypomere sieve plates 6, pitch of holes 20-36mm; The sieve diameter 8-16mm of body of the tower 5 stage casing sieve plates 6, pitch of holes 16-32mm: the sieve diameter 7-14mm of body of the tower 5 epimere sieve plates 6, pitch of holes 14-28mm.Body of the tower 5 hypomere sieve plate spacings are 100-150mm; Body of the tower 5 stage casings, epimere sieve plate spacing are 70-120mm.

Washing device comprises washing device mixing tank 13 and washing device phase splitting device 14, washing device secondary mixing tank 21 and washing device secondary phase splitting device 22, washing device mixing tank 13 is provided with washing device continuous phase fluid inlet 15, washing device dispersed phase fluid inlet 16 and washing device mixed phase fluid outlet 17, washing device phase splitting device 14 is provided with washing device mixed phase import 18, washing device heavy out 20 and washing device light phase export 19, and washing device mixed phase fluid outlet 17 is connected with washing device mixed phase import 18; Washing device secondary mixing tank 21 is provided with washing device secondary continuous phase fluid inlet 23, washing device secondary dispersed phase fluid inlet 24 and washing device secondary mixed phase fluid outlet 25, washing device secondary phase splitting device 22 is provided with washing device secondary mixed phase import 26, washing device secondary heavy out 28 and washing device secondary light phase export 27, and washing device secondary mixed phase fluid outlet 25 is connected with washing device secondary mixed phase import 26; Washing device light phase export 19 is connected with washing device secondary continuous phase fluid inlet 23, and washing device secondary heavy out 28 is connected with washing device dispersed phase fluid inlet 16;

Back extraction device comprises back extraction device mulser A37 and back extraction device phase splitting device A38, back extraction device mixing tank A46 and back extraction device phase splitting device B47, back extraction device mulser A37 is provided with back extraction device mulser A import 39, back extraction device mulser A outlet 40, back extraction device phase splitting device A38 is provided with back extraction device mixed phase import 41, back extraction device heavy out 42 and back extraction device light phase export 43, back extraction device mulser A import 39 is connected with back extraction device phosphoric acid import 44 and back extraction device solvent inlet 45, and back extraction device mulser A outlet 40 is connected with back extraction device mixed phase import 41; Back extraction device mixing tank A46 is provided with back extraction device mixing tank A continuous phase fluid inlet 48, back extraction device mixing tank A dispersed phase fluid inlet 49 and back extraction device mixing tank A mixed phase fluid outlet 50, back extraction device phase splitting device B47 is provided with back extraction device phase splitting device B mixed phase import 51, back extraction device phase splitting device B light phase export 52 and back extraction device phase splitting device B heavy out 53, and back extraction device mixing tank A mixed phase fluid outlet 50 is connected with back extraction device phase splitting device B mixed phase import 51; Back extraction device light phase export 43 is connected with back extraction device mixing tank A continuous phase fluid inlet 48, and back extraction device phase splitting device B heavy out 53 is connected with back extraction device phosphoric acid import 44.

During use, feed phosphoric acid (fresh phosphoric) enters body of the tower 5 from extraction plant sieve-tray tower heavy phase import 3 by heavy phase distribution plate 4, organic solvent enters body of the tower 5 from the light phase import 11 of extraction plant sieve-tray tower by light phase distribution plate 7, two materials are reverse contact in body of the tower 5, provide pulse power by surge generator 12, two materials are realized efficient mass transfer in tower.Phosphoric acid is entered by organic solvent extraction gently to be become the extraction loaded solvent mutually and rises to clarifying chamber 1 on the extraction plant sieve-tray tower, flows out from extraction plant sieve-tray tower light phase export 2 to enter washing device.Impurity in the phosphoric acid then enters heavy phase to be become raffinate and sinks to down clarifying chamber 9, discharges from extraction plant sieve-tray tower raffinate relief outlet 10, thereby realizes extracting and separating.

At washing device, the phosphoric acid that washing device secondary secondary heavy out 28 comes out, the loaded solvent that return washing device dispersed phase fluid inlet 16 under the effect of pump, comes from extraction plant enters washing device mixing tank 13 from washing device continuous phase fluid inlet 15, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device mixing tank 13, the mixed phase that forms comes out from washing device mixed phase fluid outlet 17, enters washing device phase splitting device 14 by washing device phase splitting device mixed phase import 18.In washing device phase splitting device 14, realize the layering of mixed phase, light, the heavy two-phase of formation.Impurity in the loaded solvent enters heavy phase to be become and washes spent acid and discharge from washing device heavy out 20, be washed the loaded solvent that has purified and come out, under the effect of pump, enter washing device secondary mixing tank 21 through washing device secondary continuous phase fluid inlet 23 from washing device light phase export 19.Washing acid (purifying phosphoric acid) enters washing device secondary mixing tank 21 through washing device secondary dispersed phase fluid inlet 24, efficient mass transfer effect by washing device secondary mixing tank 21, further improve the molten washing effect of load, the mixed phase that forms comes out from washing device secondary mixed phase fluid outlet 25, enter washing device secondary phase splitting device 22 by washing device secondary phase splitting device mixed phase import 26, in washing device secondary phase splitting device 22, 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 27, impurity in the loaded solvent enters heavy phase and returns washing device mixing tank 13 by washing device secondary heavy out 28, thereby realizes washing, purifying.

At back extraction device, the phosphoric acid that comes out from back extraction device phase splitting device B heavy out 53 under the effect of pump from back extraction device phosphoric acid import 44, all enter back extraction device mulser A37 from back extraction device solvent inlet 45 by back extraction device mulser import 39 from the washing device loaded solvent, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mulser A37, the mixed phase that forms comes out from back extraction device mulser A outlet 40, enters back extraction device phase splitting device A38 by back extraction device mixed phase import 41; In back extraction device phase splitting device A38, 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 42 discharges of back extraction device heavy out, the loaded solvent that also contains part phosphoric acid comes out from back extraction device light phase export 43, enters back extraction device mixing tank A46 through back extraction device mixing tank A continuous phase fluid inlet 48 under the effect of pump; De-salted water enters back extraction device mixing tank A46 through back extraction device mixing tank A dispersed phase fluid inlet 49, efficient mass transfer effect by back extraction device mixing tank A46, further improve the back extraction effect, the mixed phase that forms comes out from back extraction device mixing tank A mixed phase fluid outlet 50, enter back extraction device phase splitting device B47 by back extraction device phase splitting device B mixed phase import 51, in back extraction device phase splitting device B47, realize the layering of mixed phase, what form is light, heavy two-phase, heavy phase is then returned back extraction device mulser A37 by back extraction device phase splitting device B heavy out 53, loaded solvent is desalted and becomes no-load solvent after the water back extraction and enter the light phase import 11 of extraction plant sieve-tray tower from back extraction device phase splitting device B light phase export 52, realizes the recycle of extraction agent.

Embodiment 2

Referring to Fig. 2, adopt the phosphoric acid purification device of three grades of washings and back extraction, comprise extraction plant, washing device and back extraction device, wherein: extraction plant is with embodiment 1.

Washing device comprises three grades of mixing tanks 29 of washing device and three grades of phase-splitting equipment 30 of washing device, three grades of mixing tanks 29 of washing device are provided with three grades of continuous phase fluid inlets 31 of washing device, washing device disperses phase fluid inlet 32 and three grades of mixed phase fluid outlets 33 of washing device for three grades, three grades of phase-splitting equipment 30 of washing device are provided with three grades of mixed phase imports 34 of washing device, three grades of heavy outs 35 of washing device and three grades of light phase exports 36 of washing device, and three grades of mixed phase fluid of washing device outlet 33 is connected with three grades of mixed phase imports 34 of washing device; Three grades of continuous phase fluid inlets 31 of washing device secondary light phase export 27 and washing device are connected, three grades of heavy outs 36 of washing device are connected with washing device secondary dispersed phase fluid inlet 24, and three grades of light phase exports 35 of washing device are connected with back extraction device solvent inlet 45;

Back extraction device comprises back extraction device mulser B54 and back extraction device phase splitting device C55, back extraction device mulser B54 is provided with back extraction device mulser B import 56, back extraction device mulser B outlet 57, back extraction device phase splitting device C55 is provided with back extraction device phase splitting device C mixed phase import 58, back extraction device phase splitting device C heavy out 59 and back extraction device phase splitting device C light phase export 60, three grades of phosphoric acid imports 61 of back extraction device mulser B import 56 and back extraction device are connected with three grades of solvent inlets 62 of back extraction device, and back extraction device mulser B outlet 57 is connected with back extraction device phase splitting device C mixed phase import 58; Three grades of solvent inlets 62 of back extraction device phase splitting device B light phase export 52 and back extraction device are connected, back extraction device phase splitting device C heavy out 59 is connected with back extraction device mixing tank A dispersed phase fluid inlet 49, when back extraction device phase splitting device C light phase export 60 connects use with the light import mutually 11 of extraction plant sieve-tray tower, at extraction plant, with embodiment 1.

At washing device, the phosphoric acid that washing device washing device secondary secondary heavy out 28 comes out, under the effect of pump, return washing device dispersed phase fluid inlet 16, enter washing device mixing tank 13 from washing device continuous phase fluid inlet 15 from the loaded solvent of extraction plant, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device mixing tank 13, the mixed phase that forms comes out from washing device mixed phase fluid outlet 17, enters washing device phase splitting device 14 by washing device phase splitting device mixed phase import 18.In washing device phase splitting device 14, realize the layering of mixed phase, light, the heavy two-phase of formation.Impurity in the loaded solvent enters heavy phase to be become and washes spent acid and discharge from washing device heavy out 20, be washed the loaded solvent that has purified and come out, under the effect of pump, enter washing device secondary mixing tank 21 through washing device secondary continuous phase fluid inlet 23 from washing device light phase export 19.The phosphoric acid that comes out from three grades of heavy outs 36 of washing device returns washing device secondary dispersed phase fluid inlet 24, effect of mass transmitting by washing device secondary mixing tank 21, the mixed phase that forms comes out from washing device secondary mixed phase fluid outlet 25, enter washing device secondary phase splitting device 22 by washing device secondary phase splitting device mixed phase import 26, in washing device secondary phase splitting device 22, realize the layering of mixed phase, what form is light, heavy two-phase, loaded solvent comes out from washing device secondary light phase export 27, enters three grades of mixing tanks 29 of washing device through three grades of continuous phase fluid inlets 31 of washing device under the effect of pump.Washing acid (purifying phosphoric acid) disperses phase fluid inlet 32 to enter three grades of mixing tanks 29 of washing device through three grades of washing devices, and the efficient mass transfer effect by multistage washing device mixing tank has improved the phosphoric acid washing effect as much as possible; The mixed phase that forms comes out from three grades of mixed phase fluid outlets 33 of washing device, enter three grades of phase-splitting equipment 30 of washing device by three grades of phase-splitting equipment of washing device mixed phase import 34, in three grades of phase-splitting equipment 30 of washing device, realize the layering of mixed phase, light, the heavy two-phase that forms, be washed the loaded solvent that has purified and come out to enter the back extraction device preface from three grades of light phase exports of washing device 35, the impurity in the loaded solvent enters heavy phase and returns washing device secondary mixing tank 21 by three grades of heavy outs 36 of washing device.By three grades of washings, the impurity major part in the loaded solvent is entered heavy phase by phosphoric acid washing and finally discharges from washing device phase splitting device heavy phase mouth, thereby realizes washing, purifying.

At back extraction device, the phosphoric acid that back extraction device phase splitting device C heavy out 59 comes out returns back extraction device mixing tank A46 under the effect of pump; Loaded solvent from back extraction device phase splitting device B light phase export 52 come out, under the effect of pump through three grades of solvent inlets 62 of back extraction device, reverse-extraction agent (de-salted water) enters back extraction device mulser B54 through three grades of phosphoric acid imports 61 of back extraction device by back extraction device mulser B import 56; The mixed phase that forms comes out from back extraction device mulser B outlet 57, enter back extraction device phase splitting device C55 by back extraction device phase splitting device C mixed phase import 58, in back extraction device phase splitting device C55, realize the layering of mixed phase, light, the heavy two-phase that forms, loaded solvent is become no-load solvent by reverse-extraction agent (de-salted water) back extraction and comes out to return extraction plant from back extraction device phase splitting device C light phase export 60; Heavy phase is then returned back extraction device mixing tank A46 by back extraction device phase splitting device C heavy out 59, with back extraction device mixing tank A continuous phase fluid inlet 48 loaded solvents that enter, efficient mass transfer effect by back extraction device mixing tank A46, the mixed phase that forms comes out from back extraction device mixing tank A mixed phase fluid outlet 50, and all the other are with embodiment 1.

Embodiment 3

Referring to Fig. 3, adopt the phosphoric acid purification device of three grades of washings and back extraction, comprise extraction plant, washing device and back extraction device, extraction plant, washing device are with embodiment 2;

Back extraction device comprises back extraction device mixing tank B63 and back extraction device phase splitting device D64, back extraction device mixing tank B63 is provided with back extraction device mixing tank B continuous phase fluid inlet 65, back extraction device mixing tank B dispersed phase fluid inlet 66 and back extraction device mixing tank B mixed phase fluid outlet 67, back extraction device phase splitting device D64 is provided with back extraction device phase splitting device D mixed phase import 68, back extraction device phase splitting device D light phase export 69 and back extraction device phase splitting device D heavy out 70, back extraction device mixing tank B mixed phase fluid outlet 67 are connected with back extraction device phase splitting device D mixed phase import 68; Back extraction device phase splitting device B light phase export 52 is connected with back extraction device mixing tank B continuous phase fluid inlet 65, back extraction device phase splitting device D heavy out 70 is connected with back extraction device mixing tank A dispersed phase fluid inlet 49, and back extraction device phase splitting device D light phase export 69 connects with the light import mutually 11 of extraction plant sieve-tray tower.

All the other are with embodiment 2.

During use, at extraction plant, washing device is with embodiment 2.

At back extraction device, the loaded solvent that comes out from back extraction device phase splitting device B light phase export 52, enter back extraction device mixing tank B63 through back extraction device mixing tank B continuous phase fluid inlet 65 under the effect of pump, reverse-extraction agent (de-salted water) enters back extraction device mixing tank B63 through back extraction device mixing tank B dispersed phase fluid inlet 66; The mixed phase that forms comes out from back extraction device mixing tank B mixed phase fluid outlet 67, enter back extraction device phase splitting device D64 by back extraction device phase splitting device D mixed phase import 68, in back extraction device phase splitting device D64, realize the layering of mixed phase, light, the heavy two-phase that forms, loaded solvent is become no-load solvent by reverse-extraction agent (de-salted water) back extraction and comes out to return extraction plant from back extraction device phase splitting device D light phase export 69; Heavy phase is then come out by back extraction device phase splitting device D heavy out 70, returns back extraction device mixing tank A 46 by back extraction device mixing tank A dispersed phase fluid inlet 49 under the effect of pump; Loaded solvent comes out from the light phase export 43 of back extraction device phase splitting device A38, under the effect of pump, enter back extraction device mixing tank A46 through back extraction device mixing tank A continuous phase fluid inlet 48, efficient mass transfer effect by back extraction device mixing tank A46, the mixed phase that forms comes out from back extraction device mixing tank A mixed phase fluid outlet 50, enter back extraction device phase splitting device B47 by back extraction device phase splitting device B mixed phase import 51, in back extraction device phase splitting device B47, realize the layering of mixed phase, what form is light, heavy two-phase, the loaded solvent that also contains part phosphoric acid enters back extraction device mixing tank B63 from back extraction device phase splitting device B light phase export 52, heavy phase then by back extraction device phase splitting device B heavy out 75 under the effect of pump from back extraction device phosphoric acid import 53, loaded solvent all enters back extraction device mulser A37 by back extraction device mulser import 39 from back extraction device solvent inlet 44, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mulser A37, the mixed phase that forms comes out from back extraction device mulser A outlet 40, enters back extraction device phase splitting device A38 by mixed phase import 41; In back extraction device phase splitting device A38, realize the layering of mixed phase, light, the heavy two-phase of formation; The phosphoric acid of loaded solvent enters heavy phase becomes purifying phosphoric acid from 42 discharges of back extraction device heavy out, and loaded solvent comes out to enter back extraction device mixing tank A46 from light phase export 43.

More than among three embodiment: 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 CN1571427A, open day: on 02 22nd, 2006, disclosed " a kind of multi-channeled micro-structured reactor ", mulser all adopts the pipeline high-shearing dispersion emulsifying machine.

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 sieve-tray tower light phase export (2) is connected with washing device continuous phase fluid inlet (15), washing device secondary light phase export (27) is connected with back extraction device solvent inlet (45), and back extraction device phase splitting device B light phase export (52) connects with the light import mutually of extraction plant sieve-tray tower (11);

Extraction plant comprises sieve-tray tower and surge generator (12), and sieve-tray tower is made of the last clarifying chamber (1) at top, the body of the tower (5) at middle part and the following clarifying chamber (9) of bottom, and it is some that sieve plate (6) is housed in the body of the tower (5); Last clarifying chamber (1) is provided with extraction plant sieve-tray tower heavy phase import (3) and extraction plant sieve-tray tower light phase export (2), and the heavy phase distribution plate (4) in extraction plant sieve-tray tower heavy phase import (3) and the body of the tower (5) is communicated with; Following clarifying chamber (9) is provided with the light phase import of extraction plant sieve-tray tower (11), peripheral hardware liquidometer (8), the bottom is provided with extraction plant sieve-tray tower raffinate relief outlet (10), light phase import of extraction plant sieve-tray tower (11) and interior light distribution plate mutually (7) connection of body of the tower (5); Surge generator (12) is connected with following clarifying chamber (9);

Washing device comprises washing device mixing tank (13) and washing device phase splitting device (14), washing device secondary mixing tank (21) and washing device secondary phase splitting device (22), washing device mixing tank (13) is provided with washing device continuous phase fluid inlet (15), washing device dispersed phase fluid inlet (16) and washing device mixed phase fluid outlet (17), washing device phase splitting device (14) is provided with washing device mixed phase import (18), washing device heavy out (20) and washing device light phase export (19), washing device mixed phase fluid outlet (17) is connected with washing device mixed phase import (18); Washing device secondary mixing tank (21) is provided with washing device secondary continuous phase fluid inlet (23), washing device secondary dispersed phase fluid inlet (24) and washing device secondary mixed phase fluid outlet (25), washing device secondary phase splitting device (22) is provided with washing device secondary mixed phase import (26), washing device secondary heavy out (28) and washing device secondary light phase export (27), and washing device secondary mixed phase fluid outlet (25) is connected with washing device secondary mixed phase import (26); Washing device light phase export (19) is connected with washing device secondary continuous phase fluid inlet (23), and washing device secondary heavy out (28) is connected with washing device dispersed phase fluid inlet (16);

Back extraction device comprises back extraction device mulser A (37) and back extraction device phase splitting device A (38), back extraction device mixing tank A (46) and back extraction device phase splitting device B (47), back extraction device mulser A (37) is provided with back extraction device mulser A import (39), back extraction device mulser A exports (40), back extraction device phase splitting device A (38) is provided with back extraction device mixed phase import (41), back extraction device heavy out (42) and back extraction device light phase export (43), back extraction device mulser A import (39) is connected with back extraction device phosphoric acid import (44) and back extraction device solvent inlet (45), and back extraction device mulser A outlet (40) is connected with back extraction device mixed phase import (41); Back extraction device mixing tank A (46) is provided with back extraction device mixing tank A continuous phase fluid inlet (48), back extraction device mixing tank A dispersed phase fluid inlet (49) and back extraction device mixing tank A mixed phase fluid outlet (50), back extraction device phase splitting device B (47) is provided with back extraction device phase splitting device B mixed phase import (51), back extraction device phase splitting device B light phase export (52) and back extraction device phase splitting device B heavy out (53), and back extraction device mixing tank A mixed phase fluid outlet (50) is connected with back extraction device phase splitting device B mixed phase import (51); Back extraction device light phase export (43) is connected with back extraction device mixing tank A continuous phase fluid inlet (48), and back extraction device phase splitting device B heavy out (53) is connected with back extraction device phosphoric acid import (44).

2. phosphoric acid purification device as claimed in claim 1 is characterized in that:

Washing device comprises three grades of mixing tanks of washing device (29) and three grades of phase-splitting equipment of washing device (30), three grades of mixing tanks of washing device (29) are provided with three grades of continuous phase fluid inlets of washing device (31), washing device disperses phase fluid inlet (32) and three grades of mixed phase fluid outlets of washing device (33) for three grades, three grades of phase-splitting equipment of washing device (30) are provided with three grades of mixed phase imports of washing device (34), three grades of light phase exports of three grades of heavy outs of washing device (35) and washing device (36), three grades of mixed phase fluid outlets of washing device (33) are connected with three grades of mixed phase imports of washing device (34); Washing device secondary light phase export (27) is connected with three grades of continuous phase fluid inlets of washing device (31), three grades of heavy outs of washing device (36) are connected with washing device secondary dispersed phase fluid inlet (24), and three grades of light phase exports of washing device (35) are connected with back extraction device solvent inlet (45);

Back extraction device comprises back extraction device mulser B (54) and back extraction device phase splitting device C (55), back extraction device mulser B (54) is provided with back extraction device mulser B import (56), back extraction device mulser B exports (57), back extraction device phase splitting device C (55) is provided with back extraction device phase splitting device C mixed phase import (58), back extraction device phase splitting device C heavy out (59) and back extraction device phase splitting device C light phase export (60), back extraction device mulser B import (56) is connected with three grades of solvent inlets of three grades of phosphoric acid imports of back extraction device (61) and back extraction device (62), and back extraction device mulser B outlet (57) is connected with back extraction device phase splitting device C mixed phase import (58); Back extraction device phase splitting device B light phase export (52) is connected with three grades of solvent inlets of back extraction device (62), back extraction device phase splitting device C heavy out (59) is connected with back extraction device mixing tank A dispersed phase fluid inlet (49), and back extraction device phase splitting device C light phase export (60) connects with the light import mutually of extraction plant sieve-tray tower (11).

3. phosphoric acid purification device as claimed in claim 1 is characterized in that:

Back extraction device comprises back extraction device mixing tank B (63) and back extraction device phase splitting device D (64), back extraction device mixing tank B (63) is provided with back extraction device mixing tank B continuous phase fluid inlet (65), back extraction device mixing tank B dispersed phase fluid inlet (66) and back extraction device mixing tank B mixed phase fluid outlet (67), back extraction device phase splitting device D (64) is provided with back extraction device phase splitting device D mixed phase import (68), back extraction device phase splitting device D light phase export (69) and back extraction device phase splitting device D heavy out (70), back extraction device mixing tank B mixed phase fluid outlet (67) is connected with back extraction device phase splitting device D mixed phase import (68); Back extraction device phase splitting device B light phase export (52) is connected with back extraction device mixing tank B continuous phase fluid inlet (65), back extraction device phase splitting device D heavy out (70) is connected with back extraction device mixing tank A dispersed phase fluid inlet (49), and back extraction device phase splitting device D light phase export (69) connects with the light import mutually of extraction plant sieve-tray tower (11).

4. phosphoric acid purification device as claimed in claim 3 is characterized in that: sieve diameter is 7-18mm.