CN201882912U - Device for purifying phosphoric acid - Google Patents

Abstract

The utility model discloses a device for purifying phosphoric acid, which comprises an extraction device, a washing device and a back extraction device, wherein the extraction device takes a pulse sieve-plate tower as mass transfer equipment; the washing device comprises a group of emulsifying machine and phase splitting equipment and a group of mixer and phase splitting equipment, or more groups of emulsifying machines and phase splitting equipment and one group of mixer and phase splitting equipment or one group of emulsifying machine and phase splitting equipment and multiple groups of mixers and phase splitting equipment are added in the combination; and the back extraction device comprises two groups of mixers and phase splitting equipment, or is formed by combining more groups of mixers and phase splitting equipment. A light phase inlet of the sieve-plate tower of the extraction device is connected with a light phase outlet of the last-stage phase splitting equipment of the back extraction device; a solvent inlet of the washing device is connected with a light phase outlet of the sieve-plate tower of the extraction device; and a continuous phase fluid inlet of the back extraction device is connected with the light phase outlet of the last-stage phase splitting equipment of the washing device. According to the utility model, the mass transfer performance can be strengthened, the purifying efficiency can be improved and the investment for the equipment and the operation expense can be reduced.

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.

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 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.

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 the washing device solvent inlet, washing device phase splitting device B light phase export is connected with back extraction device continuous phase fluid inlet, and back extraction device secondary 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;

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

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

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

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

Back extraction device comprises three grades of mixing tanks of back extraction device and three grades of phase-splitting equipment of back extraction device, three grades of mixing tanks of back extraction device are provided with back extraction device three grades of continuous phase fluid inlets, back extraction devices and connect three grades of dispersion phase fluid inlets and three grades of mixed phase fluid outlets of back extraction device, three grades of phase-splitting equipment of back extraction device are provided with three grades of mixed phase imports of back extraction device, three grades of heavy outs of back extraction device and three grades of light phase exports of back extraction device, and three grades of mixed phase fluid outlets of back extraction device are connected with three grades of mixed phase imports of back extraction device; Three grades of continuous phase fluid inlets of back extraction device secondary light phase export and back extraction device are connected, and three grades of heavy outs of back extraction device are connected with back extraction device secondary dispersed phase fluid inlet, and three grades of light phase exports of back extraction device connect with the light import mutually of extraction plant sieve-tray tower.

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

Back extraction device comprises three grades of mixing tanks of back extraction device and three grades of phase-splitting equipment of back extraction device, three grades of mixing tanks of back extraction device are provided with back extraction device three grades of continuous phase fluid inlets, back extraction devices and connect three grades of dispersion phase fluid inlets and three grades of mixed phase fluid outlets of back extraction device, three grades of phase-splitting equipment of back extraction device are provided with three grades of mixed phase imports of back extraction device, three grades of heavy outs of back extraction device and three grades of light phase exports of back extraction device, and three grades of mixed phase fluid outlets of back extraction device are connected with three grades of mixed phase imports of back extraction device; Three grades of continuous phase fluid inlets of back extraction device secondary light phase export and back extraction device are connected, and three grades of heavy outs of back extraction device are connected with back extraction device secondary dispersed phase fluid inlet, and three grades of light phase exports of back extraction device connect with the light import mutually of extraction plant sieve-tray tower.

The utility model compared with prior art as can be known from the above technical solutions, requires difference according to purifying, and wherein: extraction plant selects for use pulsed sieve plate column as mass transfer apparatus; Washing 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; Back extraction device comprises two groups of mixing tanks and phase splitting device or is combined by multiple mixer and phase splitting device.In the phosphoric acid purification process, feed phosphoric acid (fresh phosphoric) adds by the import of extraction plant sieve-tray tower heavy phase, washing acid (purifying phosphoric acid) adds by final stage washing device phosphoric acid import (or disperse phase import), and de-salted water adds by the import of back extraction device final stage disperse phase.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 solvent inlet is from extraction plant sieve-tray tower light phase export, 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.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.

Mulser, mixing tank mass transfer area are big, the mass-transfer efficiency height.The mixed solution that comes out from mulser, mixing tank 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; The mulser cost is low, can save facility investment.

Description of drawings

Fig. 1 is the secondary structure synoptic diagram of utility model;

Fig. 2 is the tertiary 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, washing device mulser A, 14, washing device phase splitting device A, 15, washing device mulser A import, 16, washing device mulser A outlet, 17, the import of washing device mixed phase, 18, the washing device heavy out, 19, the washing device light phase export, 20, the import of washing device phosphoric acid, 21, the washing device solvent inlet, 22, washing device mixing tank A, 23, washing device phase splitting device B, 24, washing device mixing tank A continuous phase fluid inlet, 25, washing device mixing tank A dispersed phase fluid inlet, 26, the outlet of washing device mixing tank A mixed phase fluid, 27, the import of washing device phase splitting device B mixed phase, 28, washing device phase splitting device B light phase export, 29, washing device phase splitting device B heavy out, 30, washing device mulser B, 31, washing device phase splitting device C, 32, washing device mulser B import, 33, washing device mulser B outlet, 34, the import of washing device phase splitting device C mixed phase, 35, washing device phase splitting device C heavy out, 36, washing device phase splitting device C light phase export, 37, three grades of phosphoric acid imports of washing device, 38, three grades of solvent inlets of washing device, 39, washing device mixing tank B, 40, washing device phase splitting device D, 41, washing device mixing tank B continuous phase fluid inlet, 42, washing device mixing tank B dispersed phase fluid inlet, 43, the outlet of washing device mixing tank B mixed phase fluid, 44, the import of washing device phase splitting device D mixed phase, 45, washing device phase splitting device D light phase export, 46, washing device phase splitting device D heavy out, 47, the back extraction device mixing tank, 48, the back extraction device phase splitting device, 49, back extraction device continuous phase fluid inlet, 50, back extraction device dispersed phase fluid inlet, 51, the outlet of back extraction device mixed phase fluid, 52, the import of back extraction device mixed phase, 53, the back extraction device light phase export, 54, the back extraction device heavy out, 55, back extraction device secondary mixing tank, 56, back extraction device secondary phase splitting device, 57, back extraction device secondary continuous phase fluid inlet, 58, back extraction device secondary dispersed phase fluid inlet, 59, the outlet of back extraction device secondary mixed phase fluid, 60, the import of back extraction device secondary mixed phase, 61, back extraction device secondary light phase export, 62, back extraction device secondary heavy out, 63, three grades of mixing tanks of back extraction device, 64, three grades of phase-splitting equipment of back extraction device, 65, three grades of continuous phase fluid inlets of back extraction device, 66, back extraction device disperses the phase fluid inlet for three grades, 67, three grades of mixed phase fluid outlets of back extraction device, 68, three grades of mixed phase imports of back extraction device, 69, three grades of light phase exports of back extraction device, 70, 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 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 solvent inlet 21, washing device phase splitting device B light phase export 28 is connected with back extraction device continuous phase fluid inlet 49, and back extraction device secondary light phase export 61 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 extraction plant sieve-tray tower and gently enters the mouth 11 mutually, peripheral hardware liquidometer 8, the bottom is provided with extraction plant sieve-tray tower raffinate relief outlet 10, the extraction plant sieve-tray tower gently enter the mouth mutually 11 with body of the tower 5 in light distribution plate mutually 7 be 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 mulser A13 and washing device phase splitting device A14, washing device mixing tank A22 and washing device phase splitting device B23, washing device mulser A13 is provided with washing device mulser A import 15, washing device mulser A outlet 16, washing device phase splitting device A14 is provided with washing device mixed phase import 17, washing device heavy out 18 and washing device light phase export 19, washing device mulser A import 15 is connected with washing device solvent inlet 21 with washing device phosphoric acid import 20, and washing device mulser A outlet 16 is connected with washing device mixed phase import 17; Washing device mixing tank A22 is provided with washing device mixing tank A continuous phase fluid inlet 24, washing device mixing tank A dispersed phase fluid inlet 25 and washing device mixing tank A mixed phase fluid outlet 26, washing device phase splitting device B23 is provided with washing device phase splitting device B mixed phase import 27, washing device phase splitting device B light phase export 28 and washing device phase splitting device B heavy out 29, and washing device mixing tank A mixed phase fluid outlet 26 is connected with washing device phase splitting device B mixed phase import 27; Washing device light phase export 19 is connected with washing device mixing tank A continuous phase fluid inlet 24, and washing device phase splitting device B heavy out 29 is connected with washing device phosphoric acid import 20;

Back extraction device comprises back extraction device mixing tank 47 and back extraction device phase splitting device 48, back extraction device secondary mixing tank 55 and back extraction device secondary phase splitting device 56, back extraction device mixing tank 47 is provided with back extraction device continuous phase fluid inlet 49, back extraction device connects dispersed phase fluid inlet 50 and back extraction device mixed phase fluid outlet 51, back extraction device phase splitting device 48 is provided with back extraction device mixed phase import 52, back extraction device heavy out 54 and back extraction device light phase export 53, and back extraction device mixed phase fluid outlet 51 is connected with back extraction device mixed phase import 52; Back extraction device secondary mixing tank 55 is provided with back extraction device secondary continuous phase fluid inlet 57, back extraction device connects secondary dispersed phase fluid inlet 58 and back extraction device secondary mixed phase fluid outlet 59, back extraction device secondary phase splitting device 56 is provided with back extraction device secondary mixed phase import 60, back extraction device secondary heavy out 62 and back extraction device secondary light phase export 61, and back extraction device secondary mixed phase fluid outlet 59 is connected with back extraction device secondary mixed phase import 60; Back extraction device light phase export 53 is connected with back extraction device secondary continuous phase fluid inlet 57, and back extraction device secondary heavy out 62 connects dispersed phase fluid inlet 50 by pipeline and back extraction device and is connected.

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 comes out from washing device phase splitting device B heavy out 29 under the effect of pump from washing device phosphoric acid import 20, all enter washing device mulser A13 from washing device solvent inlet 21 by washing device mulser import 15 from the loaded solvent of extraction plant, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device mulser A13, the mixed phase that forms comes out from washing device mulser A outlet 16, enters washing device phase splitting device A14 by washing device mixed phase import 17; In washing device phase splitting device A14, 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 18, loaded solvent comes out from washing device light phase export 19, enters washing device mixing tank A22 through washing device mixing tank A continuous phase fluid inlet 24 under the effect of pump; Purifying phosphoric acid enters washing device mixing tank A22 through washing device mixing tank A dispersed phase fluid inlet 25, efficient mass transfer effect by washing device mixing tank A22, further improve washing effect, the mixed phase that forms comes out from washing device mixing tank A mixed phase fluid outlet 26, enter washing device phase splitting device B23 by washing device phase splitting device B mixed phase import 27, in washing device phase splitting device B23, realize the layering of mixed phase, what form is light, heavy two-phase, heavy phase is then returned washing device mulser A13 by washing device phase splitting device B heavy out 29, loaded solvent enters back extraction device continuous phase fluid inlet 49 from washing device phase splitting device B light phase export 28 after being cleaned phosphoric acid washing, realizes washing, purifying.

At back extraction device, the phosphoric acid that back extraction device back extraction device secondary heavy out 62 comes out, the loaded solvent that return back extraction device back extraction device dispersed phase fluid inlet 50 under the effect of pump, comes from washing device enters back extraction device mixing tank 47 from back extraction device continuous phase fluid inlet 49, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mixing tank 47, the mixed phase that forms comes out from back extraction device mixed phase fluid outlet 51, enters back extraction device phase splitting device 48 by back extraction device mixed phase import 52.In back extraction device phase splitting device 48, 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 54 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 53, enters back extraction device secondary mixing tank 55 through back extraction device secondary continuous phase fluid inlet 57 under the effect of pump.De-salted water enters back extraction device secondary mixing tank 55 through back extraction device secondary dispersed phase fluid inlet 58, efficient mass transfer effect by back extraction device secondary mixing tank 55, 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 59, enter back extraction device secondary phase splitting device 56 by back extraction device secondary phase splitting device mixed phase import 60, in back extraction device secondary phase splitting device 56, 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 61, and the phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device mixing tank 47 by back extraction device heavy out 62.Realize 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 washing device mulser B30 and washing device phase splitting device C31, washing device mulser B30 is provided with washing device mulser B import 32, washing device mulser B outlet 33, washing device phase splitting device C31 is provided with washing device phase splitting device C mixed phase import 34, washing device phase splitting device C heavy out 35 and washing device phase splitting device C light phase export 36, three grades of phosphoric acid imports 37 of washing device mulser B import 32 and washing device are connected with three grades of solvent inlets 38 of washing device, and washing device mulser B outlet 33 is connected with washing device phase splitting device C mixed phase import 34; Washing device phase splitting device B light phase export 28 is by being connected with three grades of solvent inlets 38 of washing device, washing device phase splitting device C heavy out 35 is connected with washing device mixing tank A dispersed phase fluid inlet 25, and washing device phase splitting device C light phase export 36 is connected with back extraction device continuous phase fluid inlet 49;

Back extraction device comprises three grades of mixing tanks 63 of back extraction device and three grades of phase-splitting equipment 64 of back extraction device, three grades of mixing tanks 63 of back extraction device are provided with back extraction device three grades of continuous phase fluid inlets 65, back extraction devices and connect three grades of dispersion phase fluid inlets 66 and three grades of mixed phase fluid outlets 67 of back extraction device, three grades of phase-splitting equipment 64 of back extraction device are provided with three grades of mixed phase imports 68 of back extraction device, three grades of heavy outs 70 of back extraction device and three grades of light phase exports 69 of back extraction device, and three grades of mixed phase fluid of back extraction device outlet 67 is connected with three grades of mixed phase imports 68 of back extraction device; Three grades of continuous phase fluid inlets 65 of back extraction device secondary light phase export 61 and back extraction device are connected, three grades of heavy outs 70 of back extraction device are connected with back extraction device secondary dispersed phase fluid inlet 58, and three grades of light phase exports 69 of back extraction device connect with the light import mutually 11 of extraction plant sieve-tray tower.

All the other are with embodiment 1.

During use, at extraction plant, with embodiment 1.

At washing device, the phosphoric acid that washing device phase splitting device C heavy out 35 comes out returns washing device mixing tank A22 under the effect of pump; Loaded solvent from washing device phase splitting device B light phase export 28 come out, under the effect of pump through three grades of solvent inlets 38 of washing device, washing acid (purifying phosphoric acid) enters washing device mulser B30 through three grades of phosphoric acid imports 37 of washing device by washing device mulser B import 32; The mixed phase that forms comes out from washing device mulser B outlet 33, enter washing device phase splitting device C31 by washing device phase splitting device C mixed phase import 34, in washing device phase splitting device C31, realize the layering of mixed phase, light, the heavy two-phase that forms, loaded solvent comes out to enter back extraction device from washing device phase splitting device C light phase export 36 after being washed acid (purifying phosphoric acid) eccysis impurity; Heavy phase is then returned washing device mixing tank A22 by washing device phase splitting device C heavy out 35, with washing device mixing tank A continuous phase fluid inlet 24 loaded solvents that enter, efficient mass transfer effect by washing device mixing tank A22, the mixed phase that forms comes out from washing device mixing tank A mixed phase fluid outlet 26, enter washing device phase splitting device B23 by washing device phase splitting device B mixed phase import 27, in washing device phase splitting device B23, realize the layering of mixed phase, what form is light, heavy two-phase, loaded solvent enters washing device mulser B30 from washing device phase splitting device B light phase export 28, heavy phase is then returned washing device mulser A13 by washing device phase splitting device B heavy out 29, under the effect of pump from washing device phosphoric acid import 20, loaded solvent from extraction plant all enters washing device mulser A13 by washing device mulser import 15 from washing device solvent inlet 21, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device mulser A13, the mixed phase that forms comes out from washing device mulser outlet 16, enters washing device phase splitting device 14 by washing device mixed phase import 17; In washing device phase splitting device 14, realize the layering of mixed phase, light, the heavy two-phase of formation; The impurity of loaded solvent enters heavy phase to be become and washes spent acid and discharge from washing device heavy out 18; Loaded solvent comes out from washing device light phase export 19, enters washing device mixing tank A22 through washing device mixing tank A continuous phase fluid inlet 24 under the effect of pump.

At back extraction device, the phosphoric acid that back extraction device back extraction device secondary heavy out 62 comes out, the loaded solvent that return back extraction device back extraction device dispersed phase fluid inlet 50 under the effect of pump, comes from washing device enters back extraction device mixing tank 47 from back extraction device continuous phase fluid inlet 49, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mixing tank 47, the mixed phase that forms comes out from back extraction device mixed phase fluid outlet 51, enters back extraction device phase splitting device 48 by back extraction device mixed phase import 52.In back extraction device phase splitting device 48, 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 54 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 53, enters back extraction device secondary mixing tank 55 through back extraction device secondary continuous phase fluid inlet 57 under the effect of pump.The phosphoric acid that three grades of heavy outs 70 of back extraction device come out, under the effect of pump, return back extraction device secondary mixing tank 55, efficient mass transfer effect by back extraction device secondary mixing tank 55, the mixed phase that forms comes out from back extraction device secondary mixed phase fluid outlet 59, enter back extraction device secondary phase splitting device 56 by back extraction device secondary phase splitting device mixed phase import 60, in back extraction device secondary phase splitting device 56, realize the layering of mixed phase, what form is light, heavy two-phase, the phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device mixing tank 47 by back extraction device heavy out 62.The loaded solvent that also contains part phosphoric acid comes out from back extraction device secondary light phase export 61, under the effect of pump, disperse phase fluid inlet 66 to enter three grades of mixing tanks 63 of back extraction device through three grades of back extraction devices through three grades of continuous phase fluid inlets 65 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 67 of back extraction device, enter three grades of phase-splitting equipment 64 of back extraction device by three grades of phase-splitting equipment of back extraction device mixed phase import 68, in three grades of phase-splitting equipment 64 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 69, and the phosphoric acid in the loaded solvent enters heavy phase and returns back extraction device secondary mixing tank 55 by three grades of heavy outs 70 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 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, wherein: extraction plant is with embodiment 1;

Washing device comprises washing device mixing tank B39 and washing device phase splitting device D40, washing device mixing tank B39 is provided with washing device mixing tank B continuous phase fluid inlet 41, washing device mixing tank B dispersed phase fluid inlet 42 and washing device mixing tank B mixed phase fluid outlet 43, washing device phase splitting device D40 is provided with washing device phase splitting device D mixed phase import 44, washing device phase splitting device D light phase export 45 and washing device phase splitting device D heavy out 46, washing device mixing tank B mixed phase fluid outlet 43 are connected with washing device phase splitting device D mixed phase import 44; Washing device phase splitting device B light phase export 28 is connected with washing device mixing tank B continuous phase fluid inlet 41, washing device phase splitting device D heavy out 46 is connected with washing device mixing tank A dispersed phase fluid inlet 25, and washing device phase splitting device D light phase export 45 is connected with back extraction device continuous phase fluid inlet 49;

Back extraction device is with embodiment 2.

During use, at extraction plant, with embodiment 1.

At washing device, the loaded solvent that comes out from washing device phase splitting device B light phase export 28, enter washing device mixing tank B39 through washing device mixing tank B continuous phase fluid inlet 41 under the effect of pump, washing acid (purifying phosphoric acid) enters washing device mixing tank B39 through washing device mixing tank B dispersed phase fluid inlet 42; The mixed phase that forms comes out from washing device mixing tank B mixed phase fluid outlet 43, enter washing device phase splitting device D40 by washing device phase splitting device D mixed phase import 44, in washing device phase splitting device D40, realize the layering of mixed phase, light, the heavy two-phase that forms, loaded solvent comes out to enter back extraction device from washing device phase splitting device D light phase export 45 after being washed acid (purifying phosphoric acid) eccysis impurity; Heavy phase is then come out by washing device phase splitting device D heavy out 46, returns washing device mixing tank A 22 by washing device mixing tank A dispersed phase fluid inlet 25 under the effect of pump; Loaded solvent comes out from the light phase export 19 of washing device phase splitting device A, under the effect of pump, enter washing device mixing tank A22 through washing device mixing tank A continuous phase fluid inlet 24, efficient mass transfer effect by washing device mixing tank A22, the mixed phase that forms comes out from washing device mixing tank A mixed phase fluid outlet 26, enter washing device phase splitting device B23 by washing device phase splitting device B mixed phase import 27, in washing device phase splitting device B23, realize the layering of mixed phase, what form is light, heavy two-phase, loaded solvent enters washing device mixing tank B39 from washing device phase splitting device B light phase export 28, heavy phase then by washing device phase splitting device B heavy out 29 under the effect of pump from washing device phosphoric acid import 20, loaded solvent all enters washing device mulser A13 by washing device mulser import 15 from washing device solvent inlet 21, loaded solvent and phosphoric acid are finished the efficient mass transfer process in washing device mulser A13, the mixed phase that forms comes out from washing device mulser A outlet 16, enters washing device phase splitting device A14 by mixed phase import 17; In washing device phase splitting device A14, realize the layering of mixed phase, light, the heavy two-phase of formation; The impurity of loaded solvent enters heavy phase to be become and washes spent acid and discharge from washing device heavy out 18, and loaded solvent comes out to enter washing device mixing tank A22 from light phase export 19.

At back extraction device, with embodiment 2.

Above mulser all adopts the pipeline high-shearing dispersion emulsifying machine.

Mixing tank adopts Chinese patent publication number CN1571427A, discloses on 02 22nd, 2006 " a kind of multi-channeled micro-structured reactor ".

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

Claims (4)

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 solvent inlet (21), washing device phase splitting device B light phase export (28) is connected with back extraction device continuous phase fluid inlet (49), and back extraction device secondary light phase export (61) 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) be provided with the extraction plant sieve-tray tower gently mutually the inlet (11), peripheral hardware liquidometer (8), the bottom is provided with extraction plant sieve-tray tower raffinate relief outlet (10), and the light distribution plate mutually (7) that the extraction plant sieve-tray tower gently enters the mouth (11) mutually and body of the tower (5) is interior is communicated with; Surge generator (12) is connected with following clarifying chamber (9);

Washing device comprises washing device mulser A (13) and washing device phase splitting device A (14), washing device mixing tank A (22) and washing device phase splitting device B (23), washing device mulser A (13) is provided with washing device mulser A import (15), washing device mulser A exports (16), washing device phase splitting device A (14) is provided with washing device mixed phase import (17), washing device heavy out (18) and washing device light phase export (19), washing device mulser A import (15) is connected with washing device solvent inlet (21) with washing device phosphoric acid import (20), and washing device mulser A outlet (16) is connected with washing device mixed phase import (17); Washing device mixing tank A (22) is provided with washing device mixing tank A continuous phase fluid inlet (24), washing device mixing tank A dispersed phase fluid inlet (25) and washing device mixing tank A mixed phase fluid outlet (26), washing device phase splitting device B (23) is provided with washing device phase splitting device B mixed phase import (27), washing device phase splitting device B light phase export (28) and washing device phase splitting device B heavy out (29), and washing device mixing tank A mixed phase fluid outlet (26) is connected with washing device phase splitting device B mixed phase import (27); Washing device light phase export (19) is connected with washing device mixing tank A continuous phase fluid inlet (24), and washing device phase splitting device B heavy out (29) is connected with washing device phosphoric acid import (20);

Back extraction device comprises back extraction device mixing tank (47) and back extraction device phase splitting device (48), back extraction device secondary mixing tank (55) and back extraction device secondary phase splitting device (56), back extraction device mixing tank (47) is provided with back extraction device continuous phase fluid inlet (49), back extraction device connects dispersed phase fluid inlet (50) and back extraction device mixed phase fluid outlet (51), back extraction device phase splitting device (48) is provided with back extraction device mixed phase import (52), back extraction device heavy out (54) and back extraction device light phase export (53), back extraction device mixed phase fluid outlet (51) is connected with back extraction device mixed phase import (52); Back extraction device secondary mixing tank (55) is provided with back extraction device secondary continuous phase fluid inlet (57), back extraction device connects secondary dispersed phase fluid inlet (58) and back extraction device secondary mixed phase fluid outlet (59), back extraction device secondary phase splitting device (56) is provided with back extraction device secondary mixed phase import (60), back extraction device secondary heavy out (62) and back extraction device secondary light phase export (61), and back extraction device secondary mixed phase fluid outlet (59) is connected with back extraction device secondary mixed phase import (60); Back extraction device light phase export (53) is connected with back extraction device secondary continuous phase fluid inlet (57), and back extraction device secondary heavy out (62) connects dispersed phase fluid inlet (50) with back extraction device and is connected.

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

Washing device comprises washing device mulser B (30) and washing device phase splitting device C (31), washing device mulser B (30) is provided with washing device mulser B import (32), washing device mulser B exports (33), washing device phase splitting device C (31) is provided with washing device phase splitting device C mixed phase import (34), washing device phase splitting device C heavy out (35) and washing device phase splitting device C light phase export (36), washing device mulser B import (32) is connected with three grades of solvent inlets of three grades of phosphoric acid imports of washing device (37) and washing device (38), and washing device mulser B outlet (33) is connected with washing device phase splitting device C mixed phase import (34); Washing device phase splitting device B light phase export (28) is connected with three grades of solvent inlets of washing device (38), washing device phase splitting device C heavy out (35) is connected with washing device mixing tank A dispersed phase fluid inlet (25), and washing device phase splitting device C light phase export (36) is connected with back extraction device continuous phase fluid inlet (49);

Back extraction device comprises three grades of mixing tanks of back extraction device (63) and three grades of phase-splitting equipment of back extraction device (64), three grades of mixing tanks of back extraction device (63) are provided with three grades of continuous phase fluid inlets of back extraction device (65), back extraction device connects three grades and disperses phase fluid inlet (66) and three grades of mixed phase fluid outlets of back extraction device (67), three grades of phase-splitting equipment of back extraction device (64) are provided with three grades of mixed phase imports of back extraction device (68), three grades of light phase exports of three grades of heavy outs of back extraction device (70) and back extraction device (69), three grades of mixed phase fluid outlets of back extraction device (67) are connected with three grades of mixed phase imports of back extraction device (68); Back extraction device secondary light phase export (61) is connected with three grades of continuous phase fluid inlets of back extraction device (65), three grades of heavy outs of back extraction device (70) are connected with back extraction device secondary dispersed phase fluid inlet (58), and three grades of light phase exports of back extraction device (69) connect 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:

Washing device comprises washing device mixing tank B (39) and washing device phase splitting device D (40), washing device mixing tank B (39) is provided with washing device mixing tank B continuous phase fluid inlet (41), washing device mixing tank B dispersed phase fluid inlet (42) and washing device mixing tank B mixed phase fluid outlet (43), washing device phase splitting device D (40) is provided with washing device phase splitting device D mixed phase import (44), washing device phase splitting device D light phase export (45) and washing device phase splitting device D heavy out (46), washing device mixing tank B mixed phase fluid outlet (43) is connected with washing device phase splitting device D mixed phase import (44); Washing device phase splitting device B light phase export (28) is connected with washing device mixing tank B continuous phase fluid inlet (41), washing device phase splitting device D heavy out (46) is connected with washing device mixing tank A dispersed phase fluid inlet (25), and washing device phase splitting device D light phase export (45) is connected with back extraction device continuous phase fluid inlet (49);

Back extraction device comprises three grades of mixing tanks of back extraction device (63) and three grades of phase-splitting equipment of back extraction device (64), three grades of mixing tanks of back extraction device (63) are provided with three grades of continuous phase fluid inlets of back extraction device (65), back extraction device connects three grades and disperses phase fluid inlet (66) and three grades of mixed phase fluid outlets of back extraction device (67), three grades of phase-splitting equipment of back extraction device (64) are provided with three grades of mixed phase imports of back extraction device (68), three grades of light phase exports of three grades of heavy outs of back extraction device (70) and back extraction device (69), three grades of mixed phase fluid outlets of back extraction device (67) are connected with three grades of mixed phase imports of back extraction device (68); Back extraction device secondary light phase export (61) is connected with three grades of continuous phase fluid inlets of back extraction device (65), three grades of heavy outs of back extraction device (70) are connected with back extraction device secondary dispersed phase fluid inlet (58), and three grades of light phase exports of back extraction device (69) connect with the light import mutually of extraction plant sieve-tray tower (11).

4. as the described phosphoric acid purification device of one of claim 1-3, it is characterized in that: the sieve diameter 10-18mm of body of the tower (5) hypomere sieve plate (6), pitch of holes 20-36mm; The sieve diameter 8-16mm of body of the tower (5) stage casing sieve plate (6), pitch of holes 16-32mm: the sieve diameter 7-14mm of body of the tower (5) epimere sieve plate (6), pitch of holes 14-28mm; Body of the tower (5) hypomere sieve plate spacing is 100-150mm; Body of the tower (5) stage casing, epimere sieve plate spacing are 70-120mm.

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