CN202107534U - Phosphoric acid purifying device - Google Patents

Abstract

The utility model discloses a phosphoric acid purifying device. The phosphoric acid purifying device comprises an extraction device, a washing device and a back extraction device, wherein a single-stage extraction device formed by a mixer and phase splitting equipment or a multi-stage extraction device formed by combining mixers and phase splitting equipment is selected and used as the extraction device; a pulsed sieve plate tower is selected and used as mass transfer equipment for the washing device; and a single-stage back extraction device formed by an emulsifying machine and phase splitting equipment or a multi-stage back extraction device formed by combining emulsifying machines and phase splitting equipment is selected and used as the back extraction device. The one-stage continuous phase fluid inlet of the extraction device is connected with the light phase outlet of the final-stage phase splitting equipment of the back extraction device, the light phase inlet of the sieve plate tower of the washing device is connected with the final-stage light phase outlet of the extraction device, and the one-stage solvent inlet of the back extraction device is connected with the light phase outlet of the sieve plate tower of the washing device. Through the phosphoric acid purifying device, the mass transfer performance can be intensified, the purifying efficiency can be improved, the investment and the operating cost of the equipment can be lowered, and the occupied area is small.

Description

Phosphoric acid purification device

Technical field

The utility model relates to this chemical plant 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 plant that can realize extraction, washing, back extraction function at present is mainly following: 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, and this equipment main drawback has: horizontal multistage mixing-tempering tank floor space is bigger, is 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; Packing tower, the packing tower structure is simple relatively, but efficient is lower, the material that can not be used to that solid particulate is arranged and be prone to fouling; Sieve plate is fixed on the hub in the oscillating screen plate tower, oscillating screen plate tower, is driven by toggle, and this tower is limited by equipment material, the very difficulty that maximizes, and working cost is higher.

Mixing tank has important application in numerous hybrid reactions fields such as chemistry, chemical industry, petrochemical industry, medicine and food.This equipment mass transfer area is big, and reaction conversion ratio is high; 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 CN1516577A; Disclosed " a kind of multi-channeled micro-structured reactor " on 02 22nd, 2006, continuous phase fluid gets into reactor drum from the inlet pipe distribution chamber in this reactor drum, and dispersed phase fluid is passed dispersion medium and got into the external phase parallel channels; Under continuous phase fluid flows shear action; Be dispersed into fine droplet or bubble, contact, realize short mix and reaction between two-phase fluid with continuous phase fluid.

The rotor of mulser and stator are under the high-speed driving of motor; Bear the inferior shearing action of hundreds of thousands of at short notice; Because the powerful kinetic energy that high linear speed that the rotor high-speed rotation is produced and high frequency machinery effect belt come; Make that material receives 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 division down such as turbulent flow, 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.

The pulse plate ring tower that in wet phosphoric acid purifying, is used at present washing procedure all adopts oil phase continuous; Washing is further to wash out the impurity in the wash load solvent 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 as disperse phase and influences washing and back extraction effect; If use oscillating screen plate tower to be washing tower and back extraction tower, this tower is limited by equipment material, and equipment failure rate is high, and working cost is higher.

Summary of the invention

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

A kind of phosphoric acid purification device of the utility model; Comprise extraction plant, washing device and back extraction device; Wherein: extraction plant one-level 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 one-level light phase export is connected with the import of extraction plant one-level continuous phase fluid;

Extraction plant comprises extraction plant one-level mixing tank and extraction plant one-level phase splitting device; Extraction plant one-level mixing tank is provided with the import of extraction plant one-level continuous phase fluid, the dispersed phase fluid import of extraction plant one-level and the outlet of extraction plant one-level mixed phase fluid; Extraction plant one-level phase splitting device is provided with the import of extraction plant one-level mixed phase fluid, extraction plant one-level heavy out and extraction plant one-level light phase export, and the outlet of extraction plant one-level mixed phase fluid is connected with the import of extraction plant one-level mixed phase fluid;

Washing device comprises sieve-tray tower and washing device surge generator; The washing device sieve-tray tower is attend by the top washing device that the clarifying chamber constitutes under the washing device of washing device body of the tower and bottom at clarifying chamber, middle part, and it is some that the washing device sieve plate is housed in the washing device body of the tower; Washing device is attend the clarifying chamber and is provided with washing device detergent inlet pipe and washing device sieve-tray tower light phase export, 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 one-level mulser and back extraction device one-level phase splitting device; Back extraction device one-level mulser is provided with mulser import of back extraction device one-level and the outlet of back extraction device one-level mulser; Back extraction device one-level phase splitting device is provided with the import of back extraction device one-level mixed phase, back extraction device one-level heavy out and back extraction device one-level light phase export; The import of back extraction device one-level mulser is connected with reverse-extraction agent import of back extraction device one-level and back extraction device one-level solvent inlet, and the outlet of back extraction device one-level mulser is connected with the import of back extraction device one-level mixed phase.

Above-mentioned phosphoric acid purification device; Wherein: extraction plant comprises extraction plant secondary mixing tank and extraction plant secondary phase splitting device; Extraction plant secondary mixing tank is provided with the import of extraction plant secondary continuous phase fluid, the dispersed phase fluid import of extraction plant secondary and the outlet of extraction plant secondary mixed phase fluid; Extraction plant secondary phase splitting device is provided with the import of extraction plant secondary mixed phase fluid, extraction plant secondary heavy out and extraction plant secondary light phase export, and the outlet of extraction plant secondary mixed phase fluid is connected with the import of extraction plant secondary mixed phase fluid; Extraction plant one-level light phase export is connected with the import of extraction plant secondary continuous phase fluid, and extraction plant secondary heavy out is connected with the import of extraction plant one-level dispersed phase fluid, and extraction plant secondary light phase export connects with the light import mutually of washing device sieve-tray tower;

Back extraction device comprises back extraction device secondary mulser and back extraction device secondary phase splitting device; Back extraction device secondary mulser is provided with mulser import of back extraction device secondary and the outlet of back extraction device secondary mulser; 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; The import of back extraction device secondary mulser is connected with reverse-extraction agent import of back extraction device secondary and the import of back extraction device secondary solvent, and the outlet of back extraction device secondary mulser is connected with the import of back extraction device secondary mixed phase; Back extraction device one-level light phase export is connected with the import of back extraction device secondary solvent, and back extraction device secondary heavy out is connected with the import of back extraction device one-level reverse-extraction agent, and back extraction device secondary light phase export connects with the light import mutually of extraction plant sieve-tray tower.

Above-mentioned phosphoric acid purification device; Wherein: extraction plant comprises three grades of mixing tanks of extraction plant and three grades of phase splitting devices of extraction plant; Three grades of mixing tanks of extraction plant are provided with three grades of continuous phase fluid imports of extraction plant, three grades of dispersed phase fluid imports of extraction plant and three grades of mixed phase fluid outlets of extraction plant; Three grades of phase splitting devices of extraction plant are provided with three grades of mixed phase fluid imports of extraction plant, three grades of heavy outs of extraction plant and three grades of light phase exports of extraction plant, and three grades of mixed phase fluid outlets of extraction plant are connected with three grades of mixed phase fluid imports of extraction plant; Three grades of continuous phase fluid imports of extraction plant secondary light phase export and extraction plant are connected, and three grades of heavy outs of extraction plant are connected with the import of extraction plant secondary dispersed phase fluid, and three grades of light phase exports of extraction plant connect with the light import mutually of washing device sieve-tray tower;

Back extraction device comprises three grades of mulsers of back extraction device and three grades of phase splitting devices of back extraction device; Three grades of mulsers of back extraction device are provided with three grades of mulser imports of back extraction device and three grades of mulser outlets of back extraction device; Three grades of phase splitting devices 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; Three grades of reverse-extraction agent imports of three grades of mulser imports of back extraction device and back extraction device and three grades of solvent inlets of back extraction device are connected, and three grades of mulser outlets of back extraction device are connected with three grades of mixed phase imports of back extraction device; Three grades of solvent 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 the import of back extraction device secondary reverse-extraction agent, and three grades of phase-splittings of back extraction device are established light phase export and connected with the light import mutually of extraction plant sieve-tray tower.

The utility model compared with prior art; Have obvious beneficial effect, can know, require difference according to purifying from above technical scheme; Constitute in the phosphoric acid purification device; Extraction plant select for use single-stage that one group of mixing tank and phase splitting device constitute or by multiple mixer and phase splitting device combine multistage, washing device selects for use pulsed sieve plate column as mass transfer apparatus, back extraction device select for use single-stage that one group of mulser and phase splitting device constitute or by many groups mulser and phase splitting device combine multistage.In the phosphoric acid purification process, feed phosphoric acid (fresh phosphoric) is added by the import of back extraction device final stage reverse-extraction agent by the adding of washing device sieve-tray tower detergent inlet, reverse-extraction agent (de-salted water) by extraction plant final stage dispersed phase fluid import adding, washing acid (purifying phosphoric acid).The no-load solvent of extraction plant one-level continuous phase fluid import 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 final stage 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.

Liquidometer is installed by the clarifying chamber of attending at the pulse washing tower, and helps realizing the water operate continuously, is beneficial to the raising washing effect.Because the mixed solution that mixing tank comes out is easy to phase-splitting, thereby guarantee to divide phase effect.The purifying phosphoric acid foreign matter content that obtains is low, but through refining production food grade and electron-level phosphoric acid.System's material loading level is little, avoids hazardous material (fluids) (like 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 miniaturized; Mulser, mixing tank cost are low, can save facility investment.

Description of drawings

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

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

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

Mark among the figure:

1, extraction plant one-level mixing tank, 2, extraction plant one-level phase splitting device, 3, the import of extraction plant one-level continuous phase fluid, 4, the import of extraction plant one-level dispersed phase fluid, 5, the outlet of extraction plant one-level mixed phase fluid; 6, extraction plant one-level mixed phase fluid import, 7, extraction plant one-level light phase export, 8, extraction plant one-level heavy out, 9, extraction plant secondary mixing tank; 10, extraction plant secondary phase splitting device, 11, the import of extraction plant secondary continuous phase fluid, 12, the import of extraction plant secondary dispersed phase fluid, 13, the outlet of extraction plant secondary mixed phase fluid; 14, extraction plant secondary mixed phase fluid import, 15, extraction plant secondary light phase export, 16, extraction plant secondary heavy out, 17, three grades of mixing tanks of extraction plant; 18, three grades of phase splitting devices of extraction plant, 19, three grades of continuous phase fluid imports of extraction plant, 20, three grades of dispersed phase fluid imports of extraction plant, 21, three grades of mixed phase fluid outlets of extraction plant; 22, three grades of mixed phase fluid imports of extraction plant, 23, three grades of light phase exports of extraction plant, 24, three grades of heavy outs of extraction plant, 25, washing device attendes the clarifying chamber; 26, washing device sieve-tray tower light phase export, 27, washing device detergent inlet pipe, 28, the washing composition distribution plate, 29, the washing device body of the tower; 30, washing device sieve plate, 31, wash load solvent distribution plate, 32, clarifying chamber under the washing device; 33, wash the spent acid relief outlet, 34, the light phase import of washing device sieve-tray tower, 35, the washing device liquidometer; 36, washing device surge generator, 37, back extraction device one-level mulser, 38, back extraction device one-level phase splitting device, 39, the import of back extraction device one-level mulser; 40, back extraction device one-level mulser outlet, 41, the import of back extraction device one-level mixed phase, 42, back extraction device one-level heavy out; 43, back extraction device one-level light phase export, 44, the import of back extraction device one-level reverse-extraction agent, 45, back extraction device one-level solvent inlet; 46, back extraction device secondary mulser, 47, back extraction device secondary phase splitting device, 48, the import of back extraction device secondary mulser; 49, back extraction device secondary mulser outlet, 50, the import of back extraction device secondary mixed phase, 51, back extraction device secondary heavy out; 52, back extraction device secondary light phase export, 53, the import of back extraction device secondary reverse-extraction agent, 54, the import of back extraction device secondary solvent; 55, three grades of mulsers of back extraction device, 56, three grades of phase splitting devices of back extraction device, 57, three grades of mulser imports of back extraction device; 58, three grades of mulser outlets of back extraction device; 59, three grades of mixed phase imports of back extraction device, 60, three grades of heavy outs of back extraction device, 61, three grades of light phase exports of back extraction device; 62, three grades of reverse-extraction agent imports of back extraction device, 63, three grades of solvent inlets of back extraction device.

Embodiment

Below in conjunction with accompanying drawing,, specify as follows its embodiment of phosphoric acid purification device, structure, characteristic and the effect thereof that proposes according to the utility model:

Embodiment 1

Referring to Fig. 1; Adopt the phosphoric acid purification device of single-stage extraction and back extraction device; Comprise extraction plant, washing device and back extraction device; Wherein: extraction plant one-level light phase export 7 connects with the light import mutually 34 of washing device sieve-tray tower, and washing device sieve-tray tower light phase export 26 is connected with back extraction device one-level solvent inlet 45, and back extraction device one-level light phase export 43 is connected with extraction plant one-level continuous phase fluid import 3;

Extraction plant comprises extraction plant one-level mixing tank 1 and extraction plant one-level phase splitting device 2; Extraction plant one-level mixing tank 1 is provided with extraction plant one-level continuous phase fluid import 3, extraction plant one-level dispersed phase fluid import 4 and extraction plant one-level mixed phase fluid outlet 5; Extraction plant one-level phase splitting device 2 is provided with extraction plant one-level mixed phase fluid import 6, extraction plant one-level heavy out 8 and extraction plant one-level light phase export 7, and extraction plant one-level mixed phase fluid outlet 5 is connected with extraction plant one-level mixed phase fluid import 6;

Washing device comprises sieve-tray tower and washing device surge generator 36; The washing device sieve-tray tower is attend by the top washing device that clarifying chamber 32 constitutes under the washing device of washing device body of the tower 29 and bottom at clarifying chamber 25, middle part, and it is some that washing device sieve plate 30 is housed in the washing device body of the tower; Washing device is attend clarifying chamber 25 and is provided with washing device detergent inlet pipe 27 and washing device sieve-tray tower light phase export 26, and washing device liquidometer 35 is arranged outward, and washing device detergent inlet pipe 27 is connected with washing composition distribution plate 28; Be provided with the light phase import 34 of washing device sieve-tray tower under the washing device in the clarifying chamber 32, spent acid relief outlet 33 is washed in the bottom, and the light phase import 34 of washing device sieve-tray tower is connected with wash load solvent distribution plate 31; Washing device body of the tower bottom connects washing device surge generator 36, and pulse is imported in the tower.

Back extraction device comprises back extraction device one-level mulser 37 and back extraction device one-level phase splitting device 38; Back extraction device one-level mulser 37 is provided with back extraction device one-level mulser import 39 and back extraction device one-level mulser outlet 40; Back extraction device one-level phase splitting device 38 is provided with back extraction device one-level mixed phase import 41, back extraction device one-level heavy out 42 and back extraction device one-level light phase export 43; Back extraction device one-level mulser import 39 is connected with back extraction device one-level reverse-extraction agent import 44 and back extraction device one-level solvent inlet 45, and back extraction device one-level mulser outlet 40 is connected with back extraction device one-level mixed phase import 41.

During use; At extraction plant; Phosphoric acid gets into extraction plant one-level mixing tank 1 from extraction plant one-level dispersed phase fluid import 4, extraction agent (from the no-load solvent of back extraction device one-level light phase export 43) from extraction plant one-level continuous phase fluid import 3; Extraction agent and phosphoric acid are accomplished the efficient mass transfer process in extraction plant one-level mixing tank 1; The mixed phase that forms comes out from extraction plant one-level mixed phase fluid outlet 5, gets into extraction plant one-level phase splitting device 2 through extraction plant one-level mixed phase fluid import 6.In extraction plant one-level phase splitting device 2, realize the layering of mixed phase, formation light, weigh two phases.Phosphoric acid is extracted the agent extraction becomes loaded solvent from extraction plant one-level light phase export 7 entering washing devices, and the impurity in the phosphoric acid gets into heavy phase becomes raffinate from 8 discharges of extraction plant one-level heavy out, thereby realizes extracting and separating.

At washing device; Purifying phosphoric acid gets into washing device body of the tower 29 and is full of the washing device body of the tower from washing device detergent inlet pipe 27; The wash load solvent gets into washing device body of the tower 29 as disperse phase from the light phase import 34 of washing device sieve-tray tower; Through the dispersion of sieve aperture and the pulse action of washing device surge generator 36 generations, two materials are realized efficient mass transfers at washing device body of the tower 29.The wash load solvent is washed and rises to washing device behind the agent washing, purifying and attend clarifying chamber 25, flows out from washing device sieve-tray tower light phase export 26 to get into phosphoric acid purification back extraction operations.Impurity in the wash load solvent then gets into water to be become and washes spent acid and sink to clarifying chamber 32 under the washing device, discharges from washing spent acid relief outlet 33, thereby realizes washing, purifying.

At back extraction device; De-salted water is from back extraction device one-level reverse-extraction agent import 44, get into back extraction device one-level mulsers 37 from back extraction device one-level solvent inlet 45 through back extraction device one-level mulser import 39 from the loaded solvent of washing device; Loaded solvent and de-salted water are accomplished the efficient mass transfer process in back extraction device one-level mulser 37; The mixed phase that forms comes out from back extraction device one-level mulser outlet 40, gets into back extraction device one-level phase splitting device 38 through back extraction device one-level mixed phase import 41.In back extraction device one-level phase splitting device 38, realize the layering of mixed phase; Form light, weigh two phases; Phosphoric acid in the loaded solvent gets into heavy phase becomes purifying phosphoric acid from 42 discharges of back extraction device one-level heavy out; Loaded solvent removes and then becomes no-load solvent behind the phosphoric acid and return extraction plant from back extraction device one-level light phase export 43, thereby realizes recycling of extraction agent.

Embodiment 2

Referring to Fig. 2; Adopt the phosphoric acid purification device of secondary extraction back extraction; Comprise extraction plant, washing device and back extraction device; Wherein: extraction plant comprises extraction plant secondary mixing tank 9 and extraction plant secondary phase splitting device 10; Extraction plant secondary mixing tank 9 is provided with extraction plant secondary continuous phase fluid import 11, extraction plant secondary dispersed phase fluid import 12 and extraction plant secondary mixed phase fluid outlet 13; Extraction plant secondary phase splitting device 10 is provided with extraction plant secondary mixed phase fluid import 14, extraction plant secondary heavy out 16 and extraction plant secondary light phase export 15, and extraction plant secondary mixed phase fluid outlet 13 is connected with extraction plant secondary mixed phase fluid import 14; Extraction plant one-level light phase export 7 is connected with extraction plant secondary continuous phase fluid import 11; Extraction plant secondary heavy out 16 is connected with extraction plant one-level dispersed phase fluid import 4, and extraction plant secondary light phase export 15 connects with the light import mutually 34 of washing device sieve-tray tower;

Washing device is with embodiment 1.

Back extraction device comprises back extraction device secondary mulser 46 and back extraction device secondary phase splitting device 47; Back extraction device secondary mulser 46 is provided with back extraction device secondary mulser import 48 and back extraction device secondary mulser outlet 49; Back extraction device secondary phase splitting device 47 is provided with back extraction device secondary mixed phase import 50, back extraction device secondary heavy out 51 and back extraction device secondary light phase export 52; Back extraction device secondary mulser import 48 is connected with back extraction device secondary reverse-extraction agent import 53 and back extraction device secondary solvent import 54, and back extraction device secondary mulser outlet 49 is connected with back extraction device secondary mixed phase import 50; Back extraction device one-level light phase export 43 is connected with back extraction device secondary solvent import 54; Back extraction device secondary heavy out 51 is connected with back extraction device one-level reverse-extraction agent import 44, and back extraction device secondary light phase export 52 is connected with extraction plant one-level continuous phase fluid import 3.

All the other are with embodiment 1.

During use; The phosphoric acid that extraction plant secondary heavy out 16 comes out; Under the effect of pump, return extraction plant one-level dispersed phase fluid import 4, extraction agent (from the no-load solvent of back extraction device secondary light phase export 52) from extraction plant one-level continuous phase fluid import 3 entering extraction plant one-level mixing tanks 1; Extraction agent and phosphoric acid are accomplished the efficient mass transfer process in extraction plant one-level mixing tank 1; The mixed phase that forms comes out from extraction plant one-level mixed phase fluid outlet 5, gets into extraction plant one-level phase splitting device 2 through extraction plant one-level mixed phase fluid import 6.In extraction plant one-level phase splitting device 2, realize the layering of mixed phase, formation light, weigh two phases.Impurity in the phosphoric acid gets into heavy phase becomes raffinate from 8 discharges of extraction plant one-level heavy out.Phosphoric acid is extracted agent extraction to be become loaded solvent and comes out from extraction plant one-level light phase export 7, under the effect of pump, gets into extraction plant secondary mixing tanks 9 through extraction plant secondary continuous phase fluid import 11.Feed phosphoric acid (fresh phosphoric) gets into extraction plant secondary mixing tank 9 through extraction plant secondary dispersed phase fluid import 12; Efficient mass transfer effect through extraction plant secondary mixing tank 9; Further improve the phosphoric acid extraction rate; The mixed phase that forms comes out from extraction plant secondary mixed phase fluid outlet 13, gets into extraction plant secondary phase splitting device 10 through extraction plant secondary mixed phase fluid import 14, in extraction plant secondary phase splitting device 10, realizes the layering of mixed phase; Form light, weigh two phases; Most of phosphoric acid is extracted agent extraction entering and gently forms loaded solvent mutually from extraction plant secondary light phase export 15 entering washing devices, and heavy phase is then returned extraction plant one-level mixing tank 1 through extraction plant one-level heavy out 16, thereby realizes extracting and separating.

At washing device, with embodiment 1.

At back extraction device; The phosphoric acid that back extraction device secondary heavy out 51 comes out; Under the effect of pump, get into back extraction device one-level mulsers 37 from back extraction device one-level solvent inlet 45 through back extraction device one-level mulser import 39 from back extraction device one-level reverse-extraction agent import 44, the loaded solvent that comes from washing device; Loaded solvent and phosphoric acid are accomplished the efficient mass transfer process in back extraction device one-level mulser 37; The mixed phase that forms comes out from back extraction device one-level mulser outlet 40, gets into back extraction device one-level phase splitting device 38 through back extraction device one-level mixed phase import 41.In back extraction device one-level phase splitting device 38, realize the layering of mixed phase, formation light, weigh two phases.Phosphoric acid in the loaded solvent gets into heavy phase becomes purifying phosphoric acid from 42 discharges of back extraction device one-level heavy out; The loaded solvent of being taken off part phosphoric acid comes out from back extraction device one-level light phase export 43, under the effect of pump, gets into back extraction device secondary mulser 46 through back extraction device secondary solvent import 54 through back extraction device secondary mulser import 48.De-salted water gets into back extraction device secondary mulser 46 through back extraction device secondary reverse-extraction agent import 53 through back extraction device secondary mulser import 48; Efficient mass transfer effect through back extraction device secondary mulser 46; Further improve the back extraction effect that load is dissolved; The mixed phase that forms comes out from back extraction device secondary mulser outlet 49; Get into back extraction device secondary phase splitting devices 47 through back extraction device secondary mixed phase import 50, the layering of realization mixed phase back extraction device secondary phase splitting device 47 in, formation light, weigh two phases; 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 52, and the phosphoric acid in the loaded solvent gets into heavy phase and returns back extraction device one-level mulser 37 through back extraction device secondary heavy out 51.

Embodiment 3

Referring to Fig. 3; Adopt the phosphoric acid purification device of three grades of extractions, washing and back extractions; Comprise extraction plant, washing device and back extraction device; Wherein: extraction plant comprises three grades of mixing tanks 17 of extraction plant and three grades of phase splitting devices 18 of extraction plant; Three grades of mixing tanks 17 of extraction plant are provided with the continuous phase fluid import of three grades of extraction plants 19, three grades of dispersed phase fluid imports 20 of extraction plant and three grades of mixed phase fluid outlets 21 of extraction plant; Three grades of phase splitting devices 18 of extraction plant are provided with three grades of mixed phase fluid imports 22 of extraction plant, three grades of heavy outs 24 of extraction plant and three grades of light phase exports 23 of extraction plant, and three grades of mixed phase fluid of extraction plant outlet 21 is connected with three grades of mixed phase fluid imports 22 of extraction plant; Three grades of continuous phase fluid imports 19 of extraction plant secondary light phase export 15 and extraction plant are connected; Three grades of heavy outs 24 of extraction plant are connected with extraction plant secondary dispersed phase fluid import 12, and three grades of light phase exports 23 of extraction plant connect with the light import mutually 34 of washing device sieve-tray tower;

Washing device and back extraction device are with embodiment 2.

Back extraction device comprises three grades of mulsers 55 of back extraction device and three grades of phase splitting devices 56 of back extraction device; Three grades of mulsers 55 of back extraction device are provided with three grades of mulser outlets 58 of three grades of mulser imports of back extraction device 57 and back extraction device; Three grades of phase splitting devices 56 of back extraction device are provided with three grades of mixed phase imports 59 of back extraction device, three grades of heavy outs 60 of back extraction device and three grades of light phase exports 61 of back extraction device; Three grades of reverse-extraction agent imports 62 of three grades of mulser imports 57 of back extraction device and back extraction device and three grades of solvent inlets 63 of back extraction device are connected, and three grades of mulsers of back extraction device outlet 58 is connected with three grades of mixed phase imports 59 of back extraction device; Three grades of solvent inlets 63 of back extraction device secondary light phase export 52 and back extraction device are connected; Three grades of phase splitting device heavy outs 60 of back extraction device are connected with back extraction device secondary reverse-extraction agent import 53, and three grades of phase-splittings of back extraction device are established light phase export 61 and are connected with extraction plant one-level continuous phase fluid import 3.All the other are with embodiment 2.

During use; The phosphoric acid that extraction plant secondary extraction plant one-level heavy out 16 comes out; Under the effect of pump, return extraction plant one-level dispersed phase fluid import 4, extraction agent (from the no-load solvent of three grades of light phase exports 61 of back extraction device) from extraction plant one-level continuous phase fluid import 3 entering extraction plant one-level mixing tanks 1; Extraction agent and phosphoric acid are accomplished the efficient mass transfer process in extraction plant one-level mixing tank 1; The mixed phase that forms comes out from extraction plant one-level mixed phase fluid outlet 5, gets into extraction plant one-level phase splitting device 2 through extraction plant one-level mixed phase fluid import 6.In extraction plant one-level phase splitting device 2, realize the layering of mixed phase, formation light, weigh two phases.Impurity in the phosphoric acid gets into heavy phase becomes raffinate from 8 discharges of extraction plant one-level heavy out.Phosphoric acid is extracted agent extraction to be become loaded solvent and comes out from extraction plant one-level light phase export 7, under the effect of pump, gets into extraction plant secondary mixing tanks 9 through extraction plant secondary continuous phase fluid import 11.The phosphoric acid that three grades of heavy outs 24 of extraction plant come out; Under the effect of pump, return extraction plant secondary mixing tank 9; Loaded solvent and phosphoric acid get into extraction plant secondary phase splitting device 10 after in extraction plant secondary mixing tank 9, accomplishing mass transfer; After extraction plant secondary phase splitting device 10 is realized phase-splitting; Heavy phase is returned extraction plant one-level mixing tank 1 from extraction plant secondary heavy out 16, and loaded solvent comes out from extraction plant secondary light phase export 15, under the effect of pump, gets into three grades of mixing tanks 17 of extraction plants through the continuous phase fluid import of three grades of extraction plant extraction plants 19, feed phosphoric acid (fresh phosphoric) through three grades of dispersed phase fluid imports of extraction plant 20; Efficient mass transfer effect through multi-level mixer has improved the phosphoric acid extraction rate as much as possible; The mixed phase that forms comes out from three grades of mixed phase fluid outlets 21 of extraction plant; Get into three grades of phase splitting devices 18 of extraction plant through three grades of mixed phase fluid imports of extraction plant 22; In three grades of phase splitting devices 18 of extraction plant, realize the layering of mixed phase; Form light, weigh two phases; Most of phosphoric acid is extracted the agent extraction and gets into and gently form loaded solvent mutually and come out to get into washing device from three grades of light phase exports of extraction plant 23, and heavy phase is then returned extraction plant secondary mixing tank 9 through three grades of heavy outs 24 of extraction plant, thereby realizes extracting and separating.

At washing device, with embodiment 1.

At back extraction device, the phosphoric acid that three grades of heavy outs 60 of back extraction device come out returns back extraction device secondary mulser 46 under the effect of pump; The loaded solvent that contains part phosphoric acid comes out from back extraction device secondary phase splitting device 47 light phase exports; Under the effect of pump, get into three grades of mulsers 55 of back extraction device through three grades of reverse-extraction agent imports of back extraction device 62 through three grades of mulser imports of back extraction device 57 through three grades of solvent inlets 63 of back extraction device, de-salted water; Through the efficient mass transfer effect of multistage mulser, improved phosphoric acid back extraction effect as much as possible; The mixed phase that forms comes out from three grades of mulser outlets 58 of back extraction device; Get into three grades of phase splitting devices 56 of back extraction device through three grades of mixed phase imports of back extraction device 59; In three grades of phase splitting devices 56 of back extraction device, realize the layering of mixed phase; Form light, weigh two phases; 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 61, and the phosphoric acid in the loaded solvent gets into heavy phase and returns back extraction device secondary mulser 46 through back extraction device heavy out 60.Through three grades of back extractions, the phosphoric acid in the loaded solvent is got into heavy phase by the de-salted water back extraction and finally discharges from back extraction device one-level heavy out 42, becomes purifying phosphoric acid.All the other principle of work are with embodiment 2

More than among three embodiment: mixing tank adopts Chinese patent publication number CN1516577A, open day: on 02 22nd, 2006, disclosed " a kind of multi-channeled micro-structured reactor ".

The above; It only is the preferred embodiment of the utility model; Be not that the utility model is done any pro forma restriction; Any the utility model technical scheme content that do not break away from, all still belongs in the scope of the utility model technical scheme any simple modification, equivalent variations and modification that above embodiment did according to the technical spirit of the utility model.

Claims (3)

1. phosphoric acid purification device; Comprise extraction plant, washing device and back extraction device; It is characterized in that: extraction plant one-level light phase export (7) connects with the light import mutually of washing device sieve-tray tower (34); Washing device sieve-tray tower light phase export (26) is connected with back extraction device one-level solvent inlet (45), and back extraction device one-level light phase export (43) is connected with extraction plant one-level continuous phase fluid import (3);

Extraction plant comprises extraction plant one-level mixing tank (1) and extraction plant one-level phase splitting device (2); Extraction plant one-level mixing tank (1) is provided with extraction plant one-level continuous phase fluid import (3), extraction plant one-level dispersed phase fluid import (4) and extraction plant one-level mixed phase fluid outlet (5); Extraction plant one-level phase splitting device (2) is provided with extraction plant one-level mixed phase fluid import (6), extraction plant one-level heavy out (8) and extraction plant one-level light phase export (7), and extraction plant one-level mixed phase fluid outlet (5) is connected with extraction plant one-level mixed phase fluid import (6);

Washing device comprises sieve-tray tower and washing device surge generator (36); The washing device sieve-tray tower is attend by the top washing device that clarifying chamber (32) constitutes under the washing device of washing device body of the tower (29) and bottom at clarifying chamber (25), middle part, and it is some that washing device sieve plate (30) is housed in the washing device body of the tower; Washing device is attend clarifying chamber (25) and is provided with washing device detergent inlet pipe (27) and washing device sieve-tray tower light phase export (26); Washing device liquidometer (35) is arranged outward, and washing device detergent inlet pipe (27) is connected with washing composition distribution plate (28); Be provided with the light phase import of washing device sieve-tray tower (34) in the clarifying chamber under the washing device (32), spent acid relief outlet (33) is washed in the bottom, and the light phase import of washing device sieve-tray tower (34) is connected with wash load solvent distribution plate (31); Washing device body of the tower bottom connects washing device surge generator (36);

Back extraction device comprises back extraction device one-level mulser (37) and back extraction device one-level phase splitting device (38); Back extraction device one-level mulser (37) is provided with back extraction device one-level mulser import (39) and back extraction device one-level mulser outlet (40); Back extraction device one-level phase splitting device (38) is provided with back extraction device one-level mixed phase import (41), back extraction device one-level heavy out (42) and back extraction device one-level light phase export (43); Back extraction device one-level mulser import (39) is connected with back extraction device one-level reverse-extraction agent import (44) and back extraction device one-level solvent inlet (45), and back extraction device one-level mulser outlet (40) is connected with back extraction device one-level mixed phase import (41).

2. phosphoric acid purification device as claimed in claim 1; It is characterized in that: extraction plant comprises extraction plant secondary mixing tank (9) and extraction plant secondary phase splitting device (10); Extraction plant secondary mixing tank (9) is provided with extraction plant secondary continuous phase fluid import (11), extraction plant secondary dispersed phase fluid import (12) and extraction plant secondary mixed phase fluid outlet (13); Extraction plant secondary phase splitting device (10) is provided with extraction plant secondary mixed phase fluid import (14), extraction plant secondary heavy out (16) and extraction plant secondary light phase export (15), and extraction plant secondary mixed phase fluid outlet (13) is connected with extraction plant secondary mixed phase fluid import (14); Extraction plant one-level light phase export (7) is connected with extraction plant secondary continuous phase fluid import (11); Extraction plant secondary heavy out (16) is connected with extraction plant one-level dispersed phase fluid import (4), and extraction plant secondary light phase export (15) connects with the light import mutually of washing device sieve-tray tower (34);

Back extraction device comprises back extraction device secondary mulser (46) and back extraction device secondary phase splitting device (47); Back extraction device secondary mulser (46) is provided with back extraction device secondary mulser import (48) and back extraction device secondary mulser outlet (49); Back extraction device secondary phase splitting device (47) is provided with back extraction device secondary mixed phase import (50), back extraction device secondary heavy out (51) and back extraction device secondary light phase export (52); Back extraction device secondary mulser import (48) is connected with back extraction device secondary reverse-extraction agent import (53) and back extraction device secondary solvent import (54), and back extraction device secondary mulser outlet (49) is connected with back extraction device secondary mixed phase import (50); Back extraction device one-level light phase export (43) is connected with back extraction device secondary solvent import (54); Back extraction device secondary heavy out (51) is connected with back extraction device one-level reverse-extraction agent import (44), and back extraction device secondary light phase export (52) is connected with extraction plant one-level continuous phase fluid import (3).

3. phosphoric acid purification device as claimed in claim 2; It is characterized in that: extraction plant comprises three grades of mixing tanks of extraction plant (17) and three grades of phase splitting devices of extraction plant (18); Three grades of mixing tanks of extraction plant (17) are provided with three grades of continuous phase fluid imports of extraction plant (19), three grades of dispersed phase fluid imports of extraction plant (20) and three grades of mixed phase fluid outlets of extraction plant (21); Three grades of phase splitting devices of extraction plant (18) are provided with three grades of mixed phase fluid imports of extraction plant (22), three grades of heavy outs of extraction plant (24) and three grades of light phase exports of extraction plant (23), and three grades of mixed phase fluid outlets of extraction plant (21) are connected with three grades of mixed phase fluid imports of extraction plant (22); Extraction plant secondary light phase export (15) is connected with three grades of continuous phase fluid imports of extraction plant (19); Three grades of heavy outs of extraction plant (24) are connected with extraction plant secondary dispersed phase fluid import (12), and three grades of light phase exports of extraction plant (23) connect with the light import mutually of washing device sieve-tray tower (34);

Back extraction device comprises three grades of mulsers of back extraction device (55) and three grades of phase splitting devices of back extraction device (56); Three grades of mulsers of back extraction device (55) are provided with three grades of mulser imports of back extraction device (57) and three grades of mulser outlets of back extraction device (58); Three grades of phase splitting devices of back extraction device (56) are provided with three grades of mixed phase imports of back extraction device (59), three grades of heavy outs of back extraction device (60) and three grades of light phase exports of back extraction device (61); Three grades of mulser imports of back extraction device (57) are connected with three grades of reverse-extraction agent imports of back extraction device (62) and three grades of solvent inlets of back extraction device (63), and three grades of mulser outlets of back extraction device (58) are connected with three grades of mixed phase imports of back extraction device (59); Back extraction device secondary light phase export (52) is connected with three grades of solvent inlets of back extraction device (63); Three grades of heavy outs of back extraction device (60) are connected with back extraction device secondary reverse-extraction agent import (53), and three grades of phase-splittings of back extraction device are established light phase export (61) and are connected with extraction plant one-level continuous phase fluid import (3).

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