CN201825734U - Phosphoric acid purifier - Google Patents

Abstract

The utility model discloses a phosphoric acid purifier which comprises an extracting device, a washing device and a back extracting device, wherein pulse sieve-plate columns are selected to be mass transfer equipment by the extracting device and the washing device; and the back extracting device comprises a set of emulsifying machine and phase splitting apparatus, and a set of mixer and phase splitting apparatus, or one or more sets of emulsifying machine and phase splitting apparatus (or mixer and phase splitting apparatus) are additionally arranged on the combination. A light-phase inlet of the sieve-plate column of the extracting device is connected with a light-phase outlet of the final-stage phase splitting apparatus of the back extracting apparatus, a light-phase inlet of the sieve-plate column of the washing device is connected with a light-phase outlet of the sieve-plate column of the extracting device, and a primary solvent inlet of the back extracting device is connected with a light-phase outlet of the sieve-plate column of the washing device. With the phosphoric acid purifier, the mass transfer capacity can be strengthened, the purifying efficiency is improved, the investment of apparatus and the running cost are lowered, and the occupied area is 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 mulser and clarifying tank two portions, this equipment main drawback has: horizontal multistage mixing-tempering tank floor space is bigger, be equipped with whipping appts in each level, fluid generally needs to use pump delivery flowing of inter-stage, and cost of equipment and process cost are all bigger; 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 CN2324367 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 tower that is used at present washing procedure in wet phosphoric acid purifying is basic identical or similar to the tower structure that is used for extraction process, and operating method is also basic identical.But the mechanism of action of extraction and washing has very big difference in wet phosphoric acid purifying, require phosphoric acid as much as possible to be diffused in the organic phase as soon as possible in the extraction process, and cation impurity enters water realization separation, so general extracting operation requires organic phase as external phase, water is as disperse phase, and generally to have more precipitation to separate out in the extraction process, and equipment is resulted in blockage easily, to the structure of tower particular requirement to be arranged; Washing is that the impurity in the wash load solvent is further washed out outside the system, experiment showed, that water more can reach washing effect than organic phase is continuous continuously in washing tower.If as washing tower, the plate ring structure in the pulse plate ring tower is unfavorable for having water continuous with pulse plate ring tower, because when carrying out the water operate continuously, organic phase is easy to generate the coalescence effect and influences washing effect as disperse phase; If with vibration washing device sieve-tray tower is washing tower, this tower is limited by equipment material, the equipment failure rate height, and working cost is higher.

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

Mixing tank has important application in numerous hybrid reactions fields such as chemistry, chemical industry, petrochemical industry, medicine and food.This equipment mass transfer area is big, the reaction conversion ratio height; Cost of equipment is low, and is simple to operate; Regulate single passage width and parallel access volume and accomplish scale production, the device processes amount is big.Chinese patent publication number CN1451307A, 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 connects with the light import mutually of washing device sieve-tray tower, washing device sieve-tray tower light phase export is connected with back extraction device one-level solvent 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 extraction plant surge generator, and sieve-tray tower is made of clarifying chamber under the extraction plant of the extraction plant body of the tower at clarifying chamber, middle part on the extraction plant at top and bottom, and it is some in the extraction plant body of the tower sieve plate to be housed; The clarifying chamber is provided with heavy phase import of extraction plant sieve-tray tower and extraction plant sieve-tray tower light phase export on the extraction plant, and the extraction plant heavy phase distribution plate in the import of extraction plant sieve-tray tower heavy phase and the extraction plant body of the tower is communicated with; Under the extraction plant clarifying chamber be provided with the extraction plant sieve-tray tower gently mutually the inlet, peripheral hardware extraction plant liquidometer, the bottom is provided with extraction plant sieve-tray tower raffinate relief outlet, light inlet mutually of extraction plant sieve-tray tower and the interior light connection of distribution plate mutually of extraction plant of extraction plant body of the tower; The extraction plant surge generator is connected with clarifying chamber under the extraction plant;

The sieve diameter 10-18mm of extraction plant body of the tower hypomere sieve plate, pitch of holes 20-36mm; The sieve diameter 8-16mm of extraction plant body of the tower stage casing sieve plate, pitch of holes 16-32mm: the sieve diameter 7-14 light phase export of extraction plant body of the tower epimere sieve plate, the washing device liquidometer is arranged outward, washing device detergent inlet pipe is connected with the washing composition distribution plate; Be provided with the light phase import of washing device sieve-tray tower under the washing device in the clarifying chamber, the spent acid relief outlet is washed in the bottom, and the light phase import of washing device sieve-tray tower is connected with wash load solvent distribution plate; Washing device body of the tower bottom connects the washing device surge generator, and pulse is imported in the tower.

Washing device comprises sieve-tray tower and washing device surge generator, the washing device sieve-tray tower is made of clarifying chamber under the washing device of the washing device body of the tower at clarifying chamber, middle part on the washing device of top and bottom, and it is some that the washing device sieve plate is housed in the washing device body of the tower; The clarifying chamber is provided with washing device detergent inlet pipe and washing device sieve-tray tower light phase export on the washing device, and the washing device liquidometer is arranged outward, and washing device detergent inlet pipe is connected with the washing composition distribution plate; Be provided with the light phase import of washing device sieve-tray tower under the washing device in the clarifying chamber, the spent acid relief outlet is washed in the bottom, and the light phase import of washing device sieve-tray tower is connected with wash load solvent distribution plate; Washing device body of the tower bottom connects the washing device surge generator, and pulse is imported in the tower.

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 groove 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 by the pipeline that is provided with pump, and back extraction device phase-splitting groove B heavy out is connected with the import of back extraction device phosphoric acid by the pipeline that is provided with pump.

Above-mentioned phosphoric acid purification device, wherein: 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; Back extraction device phase splitting device B light phase export is connected by the three grades of solvent inlets of pipeline and back extraction device that are provided with pump, back extraction device phase splitting device C heavy out is connected with back extraction device mixing tank A dispersed phase fluid inlet by the pipeline that is provided with pump, and back extraction device phase splitting device C light phase export connects with the light import mutually of extraction plant sieve-tray tower.

Above-mentioned phosphoric acid purification device, wherein: 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, 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 by the pipeline that is provided with pump, back extraction device phase splitting device D heavy out is connected with back extraction device mixing tank A dispersed phase fluid inlet by the pipeline that is provided with pump, and back extraction device phase splitting device D light phase export connects 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 extraction plant, washing device select for use pulsed sieve plate column as mass transfer apparatus; 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) is added by washing device detergent inlet pipe, de-salted water is added by back extraction device final stage reverse-extraction agent import (or mixer disperses phase fluid inlet), 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 the light phase import of washing device sieve-tray tower is from extraction plant sieve-tray tower light phase export, and the loaded solvent of back extraction device one-level solvent inlet is from washing device sieve-tray tower light phase export.As can be known from the above technical solutions, because of adopting sieve-tray tower to add the extraction plant surge generator, contact with material in the tower as pulsating medium with air, and the extraction plant surge generator does not directly contact with material, less demanding to extraction plant pulsing equipment material, 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 under the last extraction plant has 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 extraction plant liquidometer that connects outside the clarifying chamber under the extraction plant 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.

This washing device sieve-tray tower can take the water continuous mode to carry out washing operation, does not produce organic phase coalescence effect, can effectively improve washing effect.The washing device liquidometer that connects outside the clarifying chamber on the washing device can help operator that phase interface is controlled at clarifying chamber on the washing device, promptly conveniently realizes that water is continuous, and the maintenance system 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 be little, appliance arrangement is arranged simple, 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, clarifying chamber on the extraction plant, 2, extraction plant sieve-tray tower light phase export, 3, the import of extraction plant sieve-tray tower heavy phase, 4, extraction plant heavy phase distribution plate, 5, extraction plant body of the tower, 6, sieve plate, 7, the light phase distribution plate of extraction plant, 8, the extraction plant liquidometer, 9, clarifying chamber under the extraction plant, 10, extraction plant sieve-tray tower raffinate relief outlet, 11, the light phase import of extraction plant sieve-tray tower, 12, the extraction plant surge generator.13, clarifying chamber on the washing device, 14, washing device sieve-tray tower light phase export, 15, washing device detergent inlet pipe, 16, the washing composition distribution plate, 17, the washing device body of the tower, 18, the washing device sieve plate, 19, wash load solvent distribution plate, 20, clarifying chamber under the washing device, 21, wash the spent acid relief outlet, 22, the light phase import of washing device sieve-tray tower, 23, the washing device liquidometer, 24, the washing device surge generator, 25, back extraction device mulser A, 26, back extraction device phase splitting device A, 27, back extraction device mulser A import, 28, back extraction device mulser A outlet, 29, the import of back extraction device mixed phase, 30, the back extraction device heavy out, 31, the back extraction device light phase export, 32, the import of back extraction device phosphoric acid, 33, the back extraction device solvent inlet, 34, back extraction device mixing tank A, 35, back extraction device phase splitting device B, 36, back extraction device mixing tank A continuous phase fluid inlet, 37, back extraction device mixing tank A dispersed phase fluid inlet, 38, the outlet of back extraction device mixing tank A mixed phase fluid, 39, the import of back extraction device phase splitting device B mixed phase, 40, back extraction device phase splitting device B light phase export, 41, back extraction device phase-splitting groove B heavy out, 42, back extraction device mulser B, 43, back extraction device phase splitting device C, 44, back extraction device mulser B import, 45, back extraction device mulser B outlet, 46, the import of back extraction device phase splitting device C mixed phase, 47, back extraction device phase splitting device C heavy out, 48, back extraction device phase splitting device C light phase export, 49, three grades of phosphoric acid imports of back extraction device, 50, three grades of solvent inlets of back extraction device, 51, back extraction device mixing tank B, 52, back extraction device phase splitting device D, 53, back extraction device mixing tank B continuous phase fluid inlet, 54, back extraction device mixing tank B dispersed phase fluid inlet, 55, the outlet of back extraction device mixing tank B mixed phase fluid, 56, the import of back extraction device phase splitting device D mixed phase, 57, back extraction device phase splitting device D light phase export, 58, 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 back extraction, comprise extraction plant, washing device and back extraction device, wherein: extraction plant sieve-tray tower light phase export 2 connects with the light import mutually 22 of washing device sieve-tray tower, washing device sieve-tray tower light phase export 14 is connected with back extraction device one-level solvent inlet 33, and back extraction device secondary light phase export 40 connects with the light import mutually 11 of extraction plant sieve-tray tower;

Extraction plant comprises sieve-tray tower and extraction plant surge generator 12, and sieve-tray tower is made of clarifying chamber 9 under the extraction plant of the extraction plant body of the tower 5 at clarifying chamber 1, middle part on the extraction plant at top and bottom, and it is some that sieve plate 6 is housed in the extraction plant body of the tower 5; 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 on the extraction plant, and the extraction plant heavy phase distribution plate 4 in the import 3 of extraction plant sieve-tray tower heavy phase and the extraction plant body of the tower 5 is communicated with; Clarifying chamber 9 is provided with the extraction plant sieve-tray tower and gently enters the mouth 11 mutually under the extraction plant, peripheral hardware extraction plant 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 extraction plant body of the tower 5 in light 7 connections of distribution plate mutually of extraction plant; Extraction plant surge generator 12 is connected with clarifying chamber 9 under the extraction plant;

The sieve diameter 10-18mm of extraction plant body of the tower 5 hypomere sieve plates 6, pitch of holes 20-36mm; The sieve diameter 8-16mm of extraction plant body of the tower 5 stage casing sieve plates 6, pitch of holes 16-32mm: the sieve diameter 7-14mm of extraction plant body of the tower 5 epimere sieve plates 6, pitch of holes 14-28mm.Extraction plant body of the tower 5 hypomere sieve plate spacings are 100-138mm; Extraction plant body of the tower 5 stage casings, epimere sieve plate spacing are 70-120mm.

Washing device comprises sieve-tray tower and washing device surge generator 24, the washing device sieve-tray tower is made of clarifying chamber 20 under the washing device of the washing device body of the tower 17 at clarifying chamber 13, middle part on the washing device of top and bottom, and it is some that washing device sieve plate 18 is housed in the washing device body of the tower; Clarifying chamber 13 is provided with washing device detergent inlet pipe 15 and washing device sieve-tray tower light phase export 14 on the washing device, and washing device liquidometer 23 is arranged outward, and washing device detergent inlet pipe 15 is connected with washing composition distribution plate 16; Be provided with the light phase import 22 of washing device sieve-tray tower under the washing device in the clarifying chamber 20, spent acid relief outlet 21 is washed in the bottom, and the light phase import 22 of washing device sieve-tray tower is connected with wash load solvent distribution plate 19; Washing device body of the tower bottom connects washing device surge generator 24, and pulse is imported in the tower.

Back extraction device comprises back extraction device mulser A25 and back extraction device phase splitting device A26, back extraction device mixing tank A34 and back extraction device phase splitting device B35, back extraction device mulser A25 is provided with back extraction device mulser A import 27, back extraction device mulser A outlet 28, back extraction device phase splitting device A26 is provided with back extraction device mixed phase import 29, back extraction device heavy out 30 and back extraction device light phase export 31, back extraction device mulser A import 27 is connected with back extraction device phosphoric acid import 32 and back extraction device solvent inlet 33, and back extraction device mulser A outlet 28 is connected with back extraction device mixed phase import 29; Back extraction device mixing tank A34 is provided with back extraction device mixing tank A continuous phase fluid inlet 36, back extraction device mixing tank A dispersed phase fluid inlet 37 and back extraction device mixing tank A mixed phase fluid outlet 38, back extraction device phase splitting device B35 is provided with back extraction device phase splitting device B mixed phase import 39, back extraction device phase splitting device B light phase export 40 and back extraction device phase-splitting groove B heavy out 41, and back extraction device mixing tank A mixed phase fluid outlet 38 is connected with back extraction device phase splitting device B mixed phase import 39; Back extraction device light phase export 31 is connected with back extraction device mixing tank A continuous phase fluid inlet 36 by the pipeline that is provided with pump, and back extraction device phase-splitting groove B heavy out 41 is connected with back extraction device phosphoric acid import 32 by the pipeline that is provided with pump.

During use, feed phosphoric acid (fresh phosphoric) enters extraction plant body of the tower 5 from extraction plant sieve-tray tower heavy phase import 3 by extraction plant heavy phase distribution plate 4, organic solvent enters extraction plant body of the tower 5 from the light phase import 11 of extraction plant sieve-tray tower by the light phase distribution plate 7 of extraction plant, two materials are reverse contact in extraction plant body of the tower 5, provide pulse power by extraction plant 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 extraction plant, 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 clarifying chamber 9 under the extraction plant, discharges from extraction plant sieve-tray tower raffinate relief outlet 10, thereby realizes extracting and separating.

At washing device, purifying phosphoric acid enters washing device body of the tower 17 and is full of the washing device body of the tower from washing device detergent inlet pipe 15, the wash load solvent enters washing device body of the tower 17 as disperse phase from the light phase import 22 of washing device sieve-tray tower, by the dispersion of sieve aperture and the pulse action of washing device surge generator 24 generations, two materials are realized efficient mass transfers at washing device body of the tower 17.The wash load solvent rises to clarifying chamber 13 on the washing device after being washed the agent washing, purifying, flows out from washing device sieve-tray tower light phase export 14 to enter phosphoric acid purification back extraction operation.Impurity in the wash load solvent then enters water to be become and washes spent acid and sink to clarifying chamber 20 under the washing device, discharges from washing spent acid relief outlet 21, thereby realizes washing, purifying.

At back extraction device, the phosphoric acid that comes out from back extraction device phase splitting device B heavy out 41 under the effect of pump from back extraction device phosphoric acid import 32, all enter back extraction device mulser A25 from back extraction device solvent inlet 33 by back extraction device mulser import 27 from the washing device loaded solvent, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mulser A25, the mixed phase that forms comes out from back extraction device mulser A outlet 28, enters back extraction device phase splitting device A26 by back extraction device mixed phase import 29; In back extraction device phase splitting device A26, 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 30 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 31, enters back extraction device mixing tank A34 through back extraction device mixing tank A continuous phase fluid inlet 36 under the effect of pump; De-salted water enters back extraction device mixing tank A34 through back extraction device mixing tank A dispersed phase fluid inlet 37, efficient mass transfer effect by back extraction device mixing tank A34, further improve the back extraction effect, the mixed phase that forms comes out from back extraction device mixing tank A mixed phase fluid outlet 38, enter back extraction device phase splitting device B35 by back extraction device phase splitting device B mixed phase import 39, in back extraction device phase splitting device B35, realize the layering of mixed phase, what form is light, heavy two-phase, heavy phase is then returned back extraction device mulser A25 by back extraction device phase splitting device B heavy out 41, 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 40, realizes the recycle of extraction agent.

Embodiment 2

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

Back extraction device comprises back extraction device mulser B42 and back extraction device phase splitting device C43, back extraction device mulser B42 is provided with back extraction device mulser B import 44, back extraction device mulser B outlet 45, back extraction device phase splitting device C43 is provided with back extraction device phase splitting device C mixed phase import 46, back extraction device phase splitting device C heavy out 47 and back extraction device phase splitting device C light phase export 48, three grades of phosphoric acid imports 49 of back extraction device mulser B import 44 and back extraction device are connected with three grades of solvent inlets 50 of back extraction device, and back extraction device mulser B outlet 45 is connected with back extraction device phase splitting device C mixed phase import 46; Back extraction device phase splitting device B light phase export 40 is connected by the three grades of solvent inlets 50 of pipeline and back extraction device that are provided with pump, back extraction device phase splitting device C heavy out 47 is connected with back extraction device mixing tank A dispersed phase fluid inlet 37 by the pipeline that is provided with pump, and back extraction device phase splitting device C light phase export 48 connects with the light import mutually 11 of extraction plant sieve-tray tower.

During use, at extraction plant, with embodiment 1.

At washing device, with embodiment 1.

At back extraction device, the phosphoric acid that back extraction device phase splitting device C heavy out 47 comes out returns back extraction device mixing tank A34 under the effect of pump; Loaded solvent from back extraction device phase splitting device B light phase export 40 come out, under the effect of pump through three grades of solvent inlets 50 of back extraction device, reverse-extraction agent (de-salted water) enters back extraction device mulser B42 through three grades of phosphoric acid imports 49 of back extraction device by back extraction device mulser B import 44; The mixed phase that forms comes out from back extraction device mulser B outlet 45, enter back extraction device phase splitting device C43 by back extraction device phase splitting device C mixed phase import 46, in back extraction device phase splitting device C43, 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 48; Heavy phase is then returned back extraction device mixing tank A34 by back extraction device phase splitting device C heavy out 47, with back extraction device mixing tank A continuous phase fluid inlet 36 loaded solvents that enter, efficient mass transfer effect by back extraction device mixing tank A34, the mixed phase that forms comes out from back extraction device mixing tank A mixed phase fluid outlet 38, and all the other are with embodiment 1.

Embodiment 3

Referring to Fig. 3, adopt the phosphoric acid purification device of three grades of back extractions, comprise extraction plant, washing device and back extraction device, wherein: extraction plant and washing device are with embodiment 1.

Back extraction device comprises back extraction device mixing tank B51 and back extraction device phase splitting device D52, back extraction device mixing tank B51 is provided with back extraction device mixing tank B continuous phase fluid inlet 53, back extraction device mixing tank B dispersed phase fluid inlet 54 and back extraction device mixing tank B mixed phase fluid outlet 55, back extraction device phase splitting device D52 is provided with back extraction device phase splitting device D mixed phase import 56, back extraction device phase splitting device D light phase export 57 and back extraction device phase splitting device D heavy out 58, back extraction device mixing tank B mixed phase fluid outlet 55 are connected with back extraction device phase splitting device D mixed phase import 56; Back extraction device phase splitting device B light phase export 40 is connected with back extraction device mixing tank B continuous phase fluid inlet 53 by the pipeline that is provided with pump, back extraction device phase splitting device D heavy out 58 is connected with back extraction device mixing tank A dispersed phase fluid inlet 37 by the pipeline that is provided with pump, and back extraction device phase splitting device D light phase export 57 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, with embodiment 1.

At washing device, with embodiment 1.

At back extraction device, the loaded solvent that comes out from back extraction device phase splitting device B light phase export 40, enter back extraction device mixing tank B51 through back extraction device mixing tank B continuous phase fluid inlet 53 under the effect of pump, reverse-extraction agent (de-salted water) enters back extraction device mixing tank B51 through back extraction device mixing tank B dispersed phase fluid inlet 54; The mixed phase that forms comes out from back extraction device mixing tank B mixed phase fluid outlet 55, enter back extraction device phase splitting device D52 by back extraction device phase splitting device D mixed phase import 56, in back extraction device phase splitting device D52, 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 57; Heavy phase is then come out by back extraction device phase splitting device D heavy out 58, returns back extraction device mixing tank A34 by back extraction device mixing tank A dispersed phase fluid inlet 37 under the effect of pump; Loaded solvent comes out from the light phase export 31 of back extraction device phase splitting device A26, under the effect of pump, enter back extraction device mixing tank A34 through back extraction device mixing tank A continuous phase fluid inlet 36, efficient mass transfer effect by back extraction device mixing tank A34, the mixed phase that forms comes out from back extraction device mixing tank A mixed phase fluid outlet 38, enter back extraction device phase splitting device B35 by back extraction device phase splitting device B mixed phase import 39, in back extraction device phase splitting device B35, 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 B51 from back extraction device phase splitting device B light phase export 40, 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 41, loaded solvent all enters back extraction device mulser A25 by back extraction device mulser import 27 from back extraction device solvent inlet 32, loaded solvent and phosphoric acid are finished the efficient mass transfer process in back extraction device mulser A25, the mixed phase that forms comes out from back extraction device mulser A outlet 28, enters back extraction device phase splitting device A26 by mixed phase import 29; In back extraction device phase splitting device A26, 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 30 discharges of back extraction device heavy out, and loaded solvent comes out to enter back extraction device mixing tank A34 from light phase export 31.All the other principle of work are with embodiment 2

More than among three embodiment: phase splitting device adopts phase-splitting groove, clarifying tank etc. to reach the equipment of phase-splitting purpose; Mulser all adopts the pipeline high-shearing dispersion emulsifying machine.Mixing tank adopts Chinese patent publication number CN1451307A, open day: on 02 22nd, 2006,

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) connects with the light import mutually of washing device sieve-tray tower (22), washing device sieve-tray tower light phase export (14) is connected with back extraction device one-level solvent inlet (33), and back extraction device secondary light phase export (40) connects with the light import mutually of extraction plant sieve-tray tower (11);

Extraction plant comprises sieve-tray tower and extraction plant surge generator (12), sieve-tray tower is made of clarifying chamber (9) under the extraction plant of the extraction plant body of the tower (5) at clarifying chamber (1), middle part on the extraction plant at top and bottom, and it is some that sieve plate (6) is housed in the extraction plant body of the tower (5); Clarifying chamber on the extraction plant (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 extraction plant heavy phase distribution plate (4) in extraction plant sieve-tray tower heavy phase import (3) and the extraction plant body of the tower (5) is communicated with; Clarifying chamber under the extraction plant (9) be provided with the extraction plant sieve-tray tower gently mutually the inlet (11), peripheral hardware extraction plant liquidometer (8), the bottom is provided with extraction plant sieve-tray tower raffinate relief outlet (10), and the light distribution plate mutually of extraction plant (7) that the extraction plant sieve-tray tower gently enters the mouth (11) mutually and extraction plant body of the tower (5) is interior is communicated with; Extraction plant surge generator (12) is connected with clarifying chamber (9) under the extraction plant;

Washing device comprises sieve-tray tower and washing device surge generator (24), the washing device sieve-tray tower is made of clarifying chamber (20) under the washing device of the washing device body of the tower (17) at clarifying chamber (13), middle part on the washing device of top and bottom, and it is some that washing device sieve plate (18) is housed in the washing device body of the tower; Clarifying chamber on the washing device (13) is provided with washing device detergent inlet pipe (15) and washing device sieve-tray tower light phase export (14), and washing device liquidometer (23) is arranged outward, and washing device detergent inlet pipe (15) is connected with washing composition distribution plate (16); Be provided with the light phase import of washing device sieve-tray tower (22) in the clarifying chamber under the washing device (20), spent acid relief outlet (21) is washed in the bottom, and the light phase import of washing device sieve-tray tower (22) is connected with wash load solvent distribution plate (19); Washing device body of the tower bottom connects washing device surge generator (24);

Back extraction device comprises back extraction device mulser A (25) and back extraction device phase splitting device A (26), back extraction device mixing tank A (34) and back extraction device phase splitting device B (35), back extraction device mulser A (25) is provided with back extraction device mulser A import (27), back extraction device mulser A exports (28), back extraction device phase splitting device A (26) is provided with back extraction device mixed phase import (29), back extraction device heavy out (30) and back extraction device light phase export (31), back extraction device mulser A import (27) is connected with back extraction device phosphoric acid import (32) and back extraction device solvent inlet (33), and back extraction device mulser A outlet (28) is connected with back extraction device mixed phase import (29); Back extraction device mixing tank A (34) is provided with back extraction device mixing tank A continuous phase fluid inlet (36), back extraction device mixing tank A dispersed phase fluid inlet (37) and back extraction device mixing tank A mixed phase fluid outlet (38), back extraction device phase splitting device B (35) is provided with back extraction device phase splitting device B mixed phase import (39), back extraction device phase splitting device B light phase export (40) and back extraction device phase-splitting groove B heavy out (41), and back extraction device mixing tank A mixed phase fluid outlet (38) is connected with back extraction device phase splitting device B mixed phase import (39); Back extraction device light phase export (31) is connected with back extraction device mixing tank A continuous phase fluid inlet (36), and back extraction device phase-splitting groove B heavy out (41) is connected with back extraction device phosphoric acid import (32) by the pipeline that is provided with pump.

2. phosphoric acid purification device as claimed in claim 1 is characterized in that: the sieve diameter 10-18mm of extraction plant body of the tower (5) hypomere sieve plate (6), pitch of holes 20-36mm; The sieve diameter 8-16mm of extraction plant body of the tower (5) stage casing sieve plate (6), pitch of holes 16-32mm: the sieve diameter 7-14mm of extraction plant body of the tower (5) epimere sieve plate (6), pitch of holes 14-28mm; Extraction plant body of the tower (5) hypomere sieve plate spacing is 100-138mm; Extraction plant body of the tower (5) stage casing, epimere sieve plate spacing are 70-120mm.

3. phosphoric acid purification device as claimed in claim 1 or 2, it is characterized in that: back extraction device comprises back extraction device mulser B (42) and back extraction device phase splitting device C (43), back extraction device mulser B (42) is provided with back extraction device mulser B import (44), back extraction device mulser B exports (45), back extraction device phase splitting device C (43) is provided with back extraction device phase splitting device C mixed phase import (46), back extraction device phase splitting device C heavy out (47) and back extraction device phase splitting device C light phase export (48), back extraction device mulser B import (44) is connected with three grades of solvent inlets of three grades of phosphoric acid imports of back extraction device (49) and back extraction device (50), and back extraction device mulser B outlet (45) is connected with back extraction device phase splitting device C mixed phase import (46); Back extraction device phase splitting device B light phase export (40) is connected with three grades of solvent inlets of back extraction device (50), back extraction device phase splitting device C heavy out (47) is connected with back extraction device mixing tank A dispersed phase fluid inlet (37), and back extraction device phase splitting device C light phase export (48) connects with the light import mutually of extraction plant sieve-tray tower (11).

4. phosphoric acid purification device as claimed in claim 1 or 2, it is characterized in that: back extraction device comprises back extraction device mixing tank B (51) and back extraction device phase splitting device D (52), back extraction device mixing tank B (51) is provided with back extraction device mixing tank B continuous phase fluid inlet (53), back extraction device mixing tank B dispersed phase fluid inlet (54) and back extraction device mixing tank B mixed phase fluid outlet (55), back extraction device phase splitting device D (52) is provided with back extraction device phase splitting device D mixed phase import (56), back extraction device phase splitting device D light phase export (57) and back extraction device phase splitting device D heavy out (58), back extraction device mixing tank B mixed phase fluid outlet (55) is connected with back extraction device phase splitting device D mixed phase import (56); Back extraction device phase splitting device B light phase export (40) is connected with back extraction device mixing tank B continuous phase fluid inlet (53), back extraction device phase splitting device D heavy out (58) is connected with back extraction device mixing tank A dispersed phase fluid inlet (37), and back extraction device phase splitting device D light phase export (57) connects with the light import mutually of extraction plant sieve-tray tower (11).

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