CN202116314U

CN202116314U - Phosphoric acid purifying device

Info

Publication number: CN202116314U
Application number: CN2011202061088U
Authority: CN
Inventors: 李红林; 吴邦文; 骆广生; 明聪
Original assignee: Wengfu Group Co Ltd
Current assignee: Wengfu Group Co Ltd
Priority date: 2011-06-19
Filing date: 2011-06-19
Publication date: 2012-01-18
Anticipated expiration: 2021-06-19

Abstract

The utility model discloses a phosphoric acid purifying device which comprises an extraction device, a cleaning device and a back extraction device, wherein the extraction device selects a pulse sieve-plate tower as a mass transfer device; the cleaning device selects a single stage structure composed of a group of mixers and split-phase devices or a multiple-stage structure combined by multiple groups of mixers and split-phase devices; and the back extraction device selects a pulse sieve-plate tower as the mass transfer device. A light phase inlet of the sieve-plate tower of the extraction device is connected with a light phase outlet of the sieve-plate tower of the back extraction device, a continuous phase fluid inlet of the cleaning device is connected with a light phase outlet of the sieve-plate tower of the extraction device, and a light phase inlet of the sieve-plate tower of the back extraction device is connected with a light phase outlet of a final stage split-phase device of the cleaning device. The phosphoric acid purifying device can strengthen the mass transfer performance, improve the purification efficiency, reduce the device investment and operation expense, and is small in area occupation.

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; 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, when carrying out production operation, needs in the tower to fill a large amount of materials, and system's start-stop car time is long, and it is big that spillage risk property takes place; And sieve plate is fixed on the hub in the oscillating screen plate tower, is driven by toggle, and this tower is limited by equipment material, and equipment failure rate is high, and working cost is higher.For addressing the above problem, Chinese patent publication number CN2325567 discloses a kind of " sieve-tray tower that is used for pulse extraction " on 02 20th, 2002, but it can only accomplish mixed processes; Material goes out also need get into 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 deposition to separate out, inconvenient operation is unfavorable for the phosphoric acid by wet process extraction.

Mixing tank has important application in numerous hybrid reactions fields such as chemistry, chemical industry, petrochemical industry, medicine and food.This equipment mass transfer area is big, 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 CN1571427A; Disclosed " a kind of multi-channeled micro-structured reactor " on 02 22nd, 2006, continuous phase fluid gets into reactor drum from the inlet tube 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.

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 the phosphoric acid purification device of facility investment and working cost.

A kind of phosphoric acid purification device of the utility model; Comprise extraction plant, washing device and back extraction device; Wherein: extraction plant sieve-tray tower light phase export is connected with washing device continuous phase fluid inlet; The washing device light phase export connects with the light import mutually of back extraction device sieve-tray tower, and back extraction device sieve-tray tower light phase export connects with the light import mutually of extraction plant sieve-tray tower;

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

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

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

Back extraction device comprises sieve-tray tower and back extraction device surge generator; The back extraction device sieve-tray tower is attend by the top back extraction device that the clarifying chamber constitutes under the back extraction device of back extraction device body of the tower and bottom at clarifying chamber, middle part, and it is some that the back extraction device sieve plate is housed in the back extraction device body of the tower; Back extraction device is attend the clarifying chamber and is provided with back extraction device reverse-extraction agent inlet pipe and back extraction device sieve-tray tower light phase export, and the back extraction device liquidometer is arranged outward, and back extraction device reverse-extraction agent inlet pipe is connected with the washing composition distribution plate; Be provided with the light phase import of back extraction device sieve-tray tower under the back extraction device in the clarifying chamber, back extraction acid relief outlet is arranged at the bottom, and the light phase import of back extraction device sieve-tray tower is connected with back extraction loaded solvent distribution plate; Back extraction device body of the tower bottom connects the back extraction device surge generator, and pulse is imported in the tower.

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

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

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

The tower that in wet phosphoric acid purifying, is used at present the back extraction operation is basic identical or similar with the tower structure that is used for extraction process, and operating method is also basic identical.But the mechanism of action of extraction and back extraction 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 get into water realization separation, so general extracting operation requires organic phase as external phase; Water is as disperse phase; And generally to have more deposition to separate out in the extraction process, and equipment is resulted in blockage easily, to the structure of tower particular requirement to be arranged; Back extraction is that the phosphoric acid in the back extraction loaded solvent is diffused into aqueous phase as soon as possible, experiment showed, that water more can reach the back extraction effect than organic phase is continuous continuously in the back extraction tower.If as the back extraction 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 the back extraction effect as disperse phase; If use vibration back extraction device sieve-tray tower to be the back extraction tower, this tower is limited by equipment material, and equipment failure rate is high, and working cost is higher.

The mixing tank mass transfer area is big, and mass-transfer efficiency is high.The mixed solution that comes out from 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 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; , the mixing tank floor space is little, appliance arrangement is arranged simple, factory building can be realized miniaturized; The mixing tank cost is 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, attendes the clarifying chamber, 2, extraction plant sieve-tray tower light phase export, 3, the import of extraction plant sieve-tray tower heavy phase; 4, heavy phase distribution plate, 5, body of the tower, 6, sieve plate; 7, light phase distribution plate, 8, liquidometer, 9, clarifying chamber down; 10, extraction plant sieve-tray tower raffinate relief outlet, 11, the light phase import of extraction plant sieve-tray tower, 12, surge generator.13, washing device mixing tank, 14, washing device phase splitting device, 15, washing device continuous phase fluid inlet, 16, washing device dispersed phase fluid inlet, 17, the outlet of washing device mixed phase fluid; 18, washing device mixed phase import, 19, the washing device light phase export, 20, the washing device heavy out, 21, washing device secondary mixing tank; 22, washing device secondary phase splitting device, 23, washing device secondary continuous phase fluid inlet, 24, washing device secondary dispersed phase fluid inlet, 25, the outlet of washing device secondary mixed phase fluid; 26, washing device secondary mixed phase import, 27, washing device secondary light phase export, 28, washing device secondary heavy out, 29, three grades of mixing tanks of washing device; 30, three grades of phase splitting devices of washing device, 31, the continuous phase fluids inlet of three grades of washing devices, 32, three grades of dispersed phase fluid inlets of washing device, 33, three grades of mixed phase fluid outlets of washing device; 34, three grades of mixed phase imports of washing device, 35, three grades of light phase exports of washing device, 36, three grades of heavy outs of washing device; 37, back extraction device is attend the clarifying chamber, and 38, back extraction device sieve-tray tower light phase export, 39, back extraction device reverse-extraction agent inlet pipe; 40, reverse-extraction agent distribution plate, 41, the back extraction device body of the tower, 42, the back extraction device sieve plate; 43, back extraction loaded solvent distribution plate, 44, clarifying chamber under the back extraction device, 45, back extraction acid relief outlet; 46, the light phase import of back extraction device sieve-tray tower, 47, the back extraction device liquidometer, 48, the back extraction device surge generator

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 washing; Comprise extraction plant, washing device and back extraction device; Wherein: extraction plant sieve-tray tower light phase export 2 is connected with washing device continuous phase fluid inlet 15, and washing device light phase export 19 connects with the light import mutually 46 of back extraction device sieve-tray tower, and back extraction device sieve-tray tower light phase export 38 connects with the light import mutually 11 of extraction plant sieve-tray tower;

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

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

Washing device comprises washing device mixing tank 13 and washing device phase splitting device 14; Washing device mixing tank 13 is provided with washing device continuous phase fluid inlet 15, washing device dispersed phase fluid inlet 16 and washing device mixed phase fluid outlet 17; Washing device phase splitting device 14 is provided with washing device mixed phase import 18, washing device heavy out 20 and washing device light phase export 19, and washing device mixed phase fluid outlet 17 is connected with washing device mixed phase import 18;

Back extraction device comprises sieve-tray tower and back extraction device surge generator 48; The back extraction device sieve-tray tower is attend by the top back extraction device that clarifying chamber 44 constitutes under the back extraction device of back extraction device body of the tower 41 and bottom at clarifying chamber 37, middle part, and it is some that back extraction device sieve plate 42 is housed in the back extraction device body of the tower; Back extraction device is attend clarifying chamber 37 and is provided with back extraction device reverse-extraction agent inlet pipe 39 and back extraction device sieve-tray tower light phase export 38, and back extraction device liquidometer 47 is arranged outward, and back extraction device reverse-extraction agent inlet pipe 39 is connected with washing composition distribution plate 40; Be provided with the light phase import 46 of back extraction device sieve-tray tower under the back extraction device in the clarifying chamber 44, back extraction acid relief outlet 45 is arranged at the bottom, and the light phase import 46 of back extraction device sieve-tray tower is connected with back extraction loaded solvent distribution plate 43; Back extraction device body of the tower bottom connects back extraction device surge generator 48, and pulse is imported in the tower.

During use; Feed phosphoric acid (fresh phosphoric) gets into body of the tower 5 from extraction plant sieve-tray tower heavy phase import 3 through heavy phase distribution plate 4; Organic solvent gets into body of the tower 5 from the light phase import 11 of extraction plant sieve-tray tower through light phase distribution plate 7; Two materials are reverse contact in body of the tower 5, through surge generator 12 pulse power is provided, and two materials are realized efficient mass transfer in tower.Phosphoric acid is risen to the extraction plant sieve-tray tower by organic solvent extraction entering gently becoming mutually extraction loaded solvent and attendes clarifying chamber 1, flows out from extraction plant sieve-tray tower light phase export 2 to get into washing devices.Impurity in the phosphoric acid then gets into heavy phase to be become raffinate and sinks to down clarifying chamber 9, discharges from extraction plant sieve-tray tower raffinate relief outlet 10, thereby realizes extracting and separating.

At washing device; Purifying phosphoric acid gets into washing device mixing tanks 13 from washing device dispersed phase fluid inlet 16, the loaded solvent that comes from extraction plant from washing device continuous phase fluid inlet 15; Loaded solvent and phosphoric acid are accomplished the efficient mass transfer process in washing device mixing tank 13; The mixed phase that forms comes out from washing device mixed phase fluid outlet 17, gets into washing device phase splitting device 14 through washing device phase splitting device mixed phase import 18.In washing device phase splitting device 14, realize the layering of mixed phase; Form light, weigh two phases; Impurity entering heavy phase in the loaded solvent becomes washes spent acid from 20 discharges of washing device heavy out; Be washed the loaded solvent that has purified and get into back extraction devices, thereby realize washing, purifying from washing device light phase export 19.

At back extraction device; De-salted water gets into back extraction device body of the tower 41 and is full of the back extraction device body of the tower from back extraction device reverse-extraction agent inlet pipe 39; The wash load solvent gets into back extraction device body of the tower 41 as disperse phase from the light phase import 46 of back extraction device sieve-tray tower; Through the dispersion of sieve aperture and the pulse action of back extraction device surge generator 48 generations, two materials are realized efficient mass transfers at back extraction device body of the tower 41.The wash load solvent becomes no-load solvent after by the de-salted water back extraction and rises to back extraction device and attend clarifying chamber 37, flows out from back extraction device sieve-tray tower light phase export 38 and returns the phosphoric acid purification extraction process.Phosphoric acid in the wash load solvent then gets into water to be become back extraction acid and sinks to clarifying chamber 44 under the back extraction device, discharges from back extraction acid relief outlet 45.

Embodiment 2

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

Washing device also comprises washing device secondary mixing tank 21 and washing device secondary phase splitting device 22; Washing device secondary mixing tank 21 is provided with washing device secondary continuous phase fluid inlet 23, washing device secondary dispersed phase fluid inlet 24 and washing device secondary mixed phase fluid outlet 25; Washing device secondary phase splitting device 22 is provided with washing device secondary mixed phase import 26, washing device secondary heavy out 28 and washing device secondary light phase export 27, and washing device secondary mixed phase fluid outlet 25 is connected with washing device secondary mixed phase import 26; Washing device light phase export 19 is connected with washing device secondary continuous phase fluid inlet 23; Washing device secondary heavy out 28 is connected with washing device dispersed phase fluid inlet 16, and washing device secondary light phase export 27 connects with the light import mutually 46 of back extraction device sieve-tray tower;

During use, at extraction plant, with embodiment 1.

At washing device; The phosphoric acid that washing device secondary secondary heavy out 28 comes out; The loaded solvent that under the effect of pump, return washing device dispersed phase fluid inlet 16, comes from extraction plant gets into washing device mixing tank 13 from washing device continuous phase fluid inlet 15; Loaded solvent and phosphoric acid are accomplished the efficient mass transfer process in washing device mixing tank 13; The mixed phase that forms comes out from washing device mixed phase fluid outlet 17, gets into washing device phase splitting device 14 through washing device phase splitting device mixed phase import 18.In washing device phase splitting device 14, realize the layering of mixed phase, formation light, weigh two phases.Impurity entering heavy phase in the loaded solvent becomes washes spent acid from 20 discharges of washing device heavy out; Be washed the loaded solvent that has purified and come out, under the effect of pump, get into washing device secondary mixing tanks 21 through washing device secondary continuous phase fluid inlet 23 from washing device light phase export 19.Washing acid (purifying phosphoric acid) gets into washing device secondary mixing tank 21 through washing device secondary dispersed phase fluid inlet 24; Efficient mass transfer effect through washing device secondary mixing tank 21; Further improve the washing effect that load is dissolved; The mixed phase that forms comes out from washing device secondary mixed phase fluid outlet 25, gets into washing device secondary phase splitting device 22 through washing device secondary phase splitting device mixed phase import 26, in washing device secondary phase splitting device 22, realizes the layering of mixed phase; Form light, weigh two phases; Be washed the loaded solvent that has purified and get into back extraction devices from washing device secondary light phase export 27, the impurity in the loaded solvent gets into heavy phase and returns washing device mixing tank 13 through washing device secondary heavy out 28, thereby realizes washing, purifying.

At back extraction device, with embodiment 1.

Embodiment 3

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

Washing device comprises three grades of mixing tanks of washing device 29 and three grades of phase splitting devices 30 of washing device; Three grades of mixing tanks 29 of washing device are provided with the continuous phase fluids inlet of three grades of washing devices 31, three grades of dispersed phase fluid inlets 32 of washing device and three grades of mixed phase fluid outlets 33 of washing device; Three grades of phase splitting devices 30 of washing device are provided with three grades of mixed phase imports 34 of washing device, three grades of heavy outs 35 of washing device and three grades of light phase exports 36 of washing device, and three grades of mixed phase fluid of washing device outlet 33 is connected with three grades of mixed phase imports 34 of washing device; Three grades of continuous phase fluid inlets 31 of washing device secondary light phase export 27 and washing device are connected; Three grades of heavy outs 36 of washing device are connected with washing device secondary dispersed phase fluid inlet 24, and three grades of light phase exports 35 of washing device connect with the light import mutually 46 of back extraction device sieve-tray tower;

During use, at extraction plant, with embodiment 2.

At washing device; The phosphoric acid that washing device washing device secondary secondary heavy out 28 comes out; Under the effect of pump, return washing device dispersed phase fluid inlet 16, get into washing device mixing tanks 13 from washing device continuous phase fluid inlet 15 from the loaded solvent of extraction plant; Loaded solvent and phosphoric acid are accomplished the efficient mass transfer process in washing device mixing tank 13; The mixed phase that forms comes out from washing device mixed phase fluid outlet 17, gets into washing device phase splitting device 14 through washing device phase splitting device mixed phase import 18.In washing device phase splitting device 14, realize the layering of mixed phase, formation light, weigh two phases.Impurity entering heavy phase in the loaded solvent becomes washes spent acid from 20 discharges of washing device heavy out; Be washed the loaded solvent that has purified and come out, under the effect of pump, get into washing device secondary mixing tanks 21 through washing device secondary continuous phase fluid inlet 23 from washing device light phase export 19.The phosphoric acid that comes out from three grades of heavy outs 36 of washing device returns washing device secondary dispersed phase fluid inlet 24; Effect of mass transmitting through washing device secondary mixing tank 21; The mixed phase that forms comes out from washing device secondary mixed phase fluid outlet 25; Get into washing device secondary phase splitting devices 22 through washing device secondary phase splitting device mixed phase import 26, the layering of realization mixed phase washing device secondary phase splitting device 22 in, formation light, weigh two phases; Loaded solvent comes out from washing device secondary light phase export 27, under the effect of pump, gets into three grades of mixing tanks 29 of washing device through three grades of continuous phase fluid inlets 31 of washing device.Washing acid (purifying phosphoric acid) gets into three grades of mixing tanks 29 of washing device through three grades of dispersed phase fluid inlets 32 of washing device, and the efficient mass transfer effect through multistage washing device mixing tank has improved the phosphoric acid washing effect as much as possible; The mixed phase that forms comes out from three grades of mixed phase fluid outlets 33 of washing device; Get into three grades of phase splitting devices 30 of washing device through three grades of phase splitting device mixed phase of washing device import 34; In three grades of phase splitting devices 30 of washing device, realize the layering of mixed phase; Form light, weigh two phases; Be washed the loaded solvent that has purified and come out to get into the back extraction device preface from three grades of light phase exports of washing device 35, the impurity in the loaded solvent gets into heavy phase and returns washing device secondary mixing tank 21 through three grades of heavy outs 36 of washing device.Through three grades of washings, the impurity major part in the loaded solvent is got into heavy phase by phosphoric acid washing and finally discharges from washing device phase splitting device heavy phase mouth, thereby realizes washing, purifying.

At back extraction device, 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; Mixing tank adopts Chinese patent publication number CN1571427A, open day: on 02 22nd, 2006, disclosed " a kind of multi-channeled micro-structured reactor ".

The above only is the preferred embodiment of the utility model, is not that the utility model is appointed

What pro forma restriction, any the utility model technical scheme content that do not break away from, according to the utility model

Technical spirit all still belongs to this to any simple modification, equivalent variations and modification that above embodiment did

In the scope of utility model technical scheme.

Claims

1. phosphoric acid purification device; Comprise extraction plant, washing device and back extraction device; It is characterized in that: extraction plant sieve-tray tower light phase export (2) is connected with washing device continuous phase fluid inlet (15); Washing device light phase export (19) connects with the light import mutually of back extraction device sieve-tray tower (46), and back extraction device sieve-tray tower light phase export (38) connects with the light import mutually of extraction plant sieve-tray tower (11);

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

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

Back extraction device comprises sieve-tray tower and back extraction device surge generator (48); The back extraction device sieve-tray tower is attend by the top back extraction device that clarifying chamber (44) constitutes under the back extraction device of back extraction device body of the tower (41) and bottom at clarifying chamber (37), middle part, and it is some that back extraction device sieve plate (42) is housed in the back extraction device body of the tower; Back extraction device is attend clarifying chamber (37) and is provided with back extraction device reverse-extraction agent inlet pipe (39) and back extraction device sieve-tray tower light phase export (38); Back extraction device liquidometer (47) is arranged outward, and back extraction device reverse-extraction agent inlet pipe (39) is connected with washing composition distribution plate (40); Be provided with the light phase import of back extraction device sieve-tray tower (46) in the clarifying chamber under the back extraction device (44), back extraction acid relief outlet (45) is arranged at the bottom, and the light phase import of back extraction device sieve-tray tower (46) is connected with back extraction loaded solvent distribution plate (43); Back extraction device body of the tower bottom connects back extraction device surge generator (48).

2. phosphoric acid purification device as claimed in claim 1; It is characterized in that: washing device comprises washing device secondary mixing tank (21) and washing device secondary phase splitting device (22); Washing device secondary mixing tank (21) is provided with washing device secondary continuous phase fluid inlet (23), washing device secondary dispersed phase fluid inlet (24) and washing device secondary mixed phase fluid outlet (25); Washing device secondary phase splitting device (22) is provided with washing device secondary mixed phase import (26), washing device secondary heavy out (28) and washing device secondary light phase export (27), and washing device secondary mixed phase fluid outlet (25) is connected with washing device secondary mixed phase import (26); Washing device light phase export (19) is connected with washing device secondary continuous phase fluid inlet (23); Washing device secondary heavy out (28) is connected with washing device dispersed phase fluid inlet (16), and washing device secondary light phase export (27) connects with the light import mutually of back extraction device sieve-tray tower (46).

3. phosphoric acid purification device as claimed in claim 2; It is characterized in that: washing device comprises three grades of mixing tanks of washing device (29) and three grades of phase splitting devices of washing device (30); Three grades of mixing tanks of washing device (29) are provided with three grades of continuous phase fluid inlets of washing device (31), three grades of dispersed phase fluid inlets of washing device (32) and three grades of mixed phase fluid outlets of washing device (33); Three grades of phase splitting devices of washing device (30) are provided with three grades of mixed phase imports of washing device (34), three grades of heavy outs of washing device (36) and three grades of light phase exports of washing device (35), and three grades of mixed phase fluid outlets of washing device (33) are connected with three grades of mixed phase imports of washing device (34); Washing device secondary light phase export (27) is connected with three grades of continuous phase fluid inlets of washing device (31); Three grades of heavy outs of washing device (36) are connected with washing device secondary dispersed phase fluid inlet (24), and three grades of light phase exports of washing device (35) connect with the light import mutually of back extraction device sieve-tray tower (46).