CN102424373A - Concentration apparatus for wet method phosphoric acid refinement - Google Patents
Concentration apparatus for wet method phosphoric acid refinement Download PDFInfo
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- CN102424373A CN102424373A CN2011104234936A CN201110423493A CN102424373A CN 102424373 A CN102424373 A CN 102424373A CN 2011104234936 A CN2011104234936 A CN 2011104234936A CN 201110423493 A CN201110423493 A CN 201110423493A CN 102424373 A CN102424373 A CN 102424373A
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Abstract
The invention relates to a concentration apparatus for wet method phosphoric acid refinement. The concentration apparatus comprises a flash evaporation chamber, a forced circulation pump, a heater, a concentration material liquid outlet pipe, a concentration material fluid inner pipe, a foam removing pipe, a cyclone separator and a steam pipe. A secondary steam outlet and a lower circulation pipe are respectively arranged on the upper end and the lower end of the flash evaporation chamber. An upper circulation pipe and the concentration material liquid outlet pipe are respectively arranged on the left side and the right side of the flash evaporation chamber. The height of the inner pipe opening on the concentration material fluid inner pipe is less than the height of the pipe opening of the upper circulation pipe. One end of an atmospheric pressure synchronization pipe is communicated with the concentration material liquid outlet pipe, and the other end of the atmospheric pressure synchronization pipe is communicated with the flash evaporation chamber or atmosphere. The foam removing pipe is connected with the secondary steam outlet. The other end of the secondary steam outlet is connected with the cyclone separator. The other end of the cyclone separator is connected with a condensate groove by a condenser. The steam pipe is arranged on a position close to the bottom of the flash evaporation chamber. With the design of the present invention, the flash evaporation effect is achieved, the siphon is prevented, it is ensured that the tiny droplet of the material liquid does not easily escape along with the secondary steam, such that the requirement of steam stripping defluoridation or steam stripping extractant recovery can be met so as to form a continuous production.
Description
Technical field
The present invention relates to a kind of concentrating unit, relate in particular to a kind of concentrating unit that is used for wet phosphoric acid refining, specifically be applicable to and improve evaporation effect, prevent siphonic effect, foam removal and satisfy the stripping defluorinate or stripping reclaims the needs of extraction agent.
Background technology
At present, vaporizer is widely used in fields such as chemical industry, pharmacy, food, generally comprises two kinds of natural-circulation evaporator and pump feed evaporators, and wherein, pump feed evaporator generally is used for concentrating of dense thick or band crystalline feed liquid.
The Chinese patent Granted publication number is CN101391784B, and Granted publication day is that the patent of invention on April 20th, 2011 discloses a kind of full forced circulation type evaporator, and the internal structure of boiling-house is too complicated in this full forced circulation type evaporator; A lot of baffle plates and traverse baffle have been added; Be unfavorable for evaporation, hinder the realization of flash distillation effect, simultaneously; The discharge port height is the same basically with opening for feed; Not only can further reduce evaporation effect, hinder the realization of flash distillation effect, and be prone to cause by concentrated feed liquid short circuit and by directly discharge.This shows that this kind full forced circulation type evaporator not only is difficult to realize the flash distillation effect, and can cause by concentrated feed liquid short circuit and directly discharged.
The Chinese patent patent No. is ZL93231051.6, and Granted publication day is that the utility model patent on March 23rd, 1994 discloses a kind of standard type pump feed evaporator, and this kind standard type pump feed evaporator has carried out second-heating; Heating for the first time is at the loop exit of evaporator room, and heating here can make recycle pump produce cavitation erosion, and the feed liquid after the second-heating is distributed in the evaporator room through distribution plate; In the hope of evenly evaporating feed liquid; Hardly realize and can cause big resistance like this, and since the recycle feed mouth up, thereby the drop that produces when being prone to cause evaporating; Be the tiny liquid pearl of feed liquid, upwards go out evaporator room with secondary steam.This shows that this kind standard type pump feed evaporator not only can make recycle pump produce cavitation erosion, and can cause the tiny liquid pearl of feed liquid to be overflowed with secondary steam.
The Chinese patent publication No. is CN102008829A; Date of publication is the method that the patent of invention on April 13rd, 2011 discloses a kind of vacuum multiple-effect forced circulation evaporation device and concentrated material thereof; This kind vacuum multiple-effect forced circulation evaporation device attempts to utilize vacuum to realize the transfer of feed liquid; But, cause to form serialization production because operation is too complicated, and needs to form or vacuum breaker.This shows that this kind vacuum multiple-effect forced circulation evaporation device can't form serialization production.
Summary of the invention
The objective of the invention is to overcome being difficult to of existing in the prior art realizes that flash distillation effect, the tiny liquid pearl of feed liquid are prone to overflow, can't form defective and problem that serialization is produced with secondary steam, provides a kind of and can realize that flash distillation effect, the tiny liquid pearl of feed liquid are difficult for overflowing, forming the concentrating unit that is used for wet phosphoric acid refining that serialization is produced with secondary steam.
For realizing above purpose; Technical solution of the present invention is: a kind of concentrating unit that is used for wet phosphoric acid refining; Comprise flashing chamber, forced circulation pump and well heater, the two ends up and down of said flashing chamber are respectively arranged with secondary steam outlet and following circulation tube, and the left and right sides is respectively arranged with upper circular tube and concentrated feed liquid outlet pipe; The other end that concentrates the feed liquid outlet pipe communicates with the concentrate feed liquid bath; The said the other end of circulation tube down is connected with forced circulation pump, and the other end of forced circulation pump is connected with well heater, and the other end of well heater is connected with upper circular tube; The upper circular tube mouth of pipe of the upper circular tube the other end is connected with flashing chamber, and the position of nearly forced circulation pump is provided with opening for feed on following circulation tube;
Said concentrating unit also comprises being arranged in the inner concentrated feed liquid of flashing chamber manages; One end that should concentrate pipe in the feed liquid is connected with concentrated feed liquid outlet pipe; The other end is the inner spout after extending below, and the nearly flashing chamber of inner spout bottom is provided with, and the height of inner spout is lower than the upper circular tube mouth of pipe.
Pipe is along the inwall setting of flashing chamber in the said concentrated feed liquid.
The position of nearly flashing chamber is provided with the air pressure lock-in tube, the other end of this air pressure lock-in tube and flashing chamber inside or atmosphere on the said concentrated feed liquid outlet pipe.
The other end of said air pressure lock-in tube is provided with the lock-in tube inner spout that communicates with flashing chamber inside, and the height of this lock-in tube inner spout is higher than the upper circular tube mouth of pipe.
Said concentrating unit also comprises the cyclonic separator that is arranged at the inner skimmer tube of flashing chamber and is arranged at the flashing chamber outside; Skimmer tube is connected with the secondary steam outlet; The other end of secondary steam outlet is connected with cyclonic separator; The other end of cyclonic separator is connected with the condensation liquid bath through condensing surface, and the condensation liquid bath is provided with and connects vacuum port.
Said skimmer tube comprises interconnective pipe portion and conus portion, and conus portion is connected with the bottom of pipe portion, and the top of pipe portion is connected with the secondary steam outlet, and on the tube wall of pipe portion, evenly is provided with a plurality of pipe taps.
Said pipe tap be shaped as circle, ellipse, trilateral or Polygons.
Said concentrating unit also comprises the vapour pipe that nearly flashing chamber bottom is provided with; This vapour pipe comprises interconnective straight tube and endless tube; One end of the straight tube endless tube inner with being positioned at flashing chamber is connected, and the other end extends to the outside of flashing chamber, and on endless tube, evenly is provided with a plurality of steam holes.
Said steam hole be shaped as circle, ellipse, trilateral or Polygons.
Compared with prior art, beneficial effect of the present invention is:
1, a kind of concentrating unit that is used for wet phosphoric acid refining of the present invention has in the concentrated feed liquid in the set inside of flashing chamber and manages, and an end of pipe is connected with concentrated feed liquid outlet pipe in this concentrated feed liquid, and the other end is the inner spout after extending below; The nearly flashing chamber of inner spout bottom is provided with; The height of inner spout is lower than the upper circular tube mouth of pipe, during use, a difference of altitude is arranged between the upper circular tube mouth of pipe and the inner spout; This difference of altitude can guarantee that the solution that flows to from the upper circular tube mouth of pipe, heating is just come out can be arranged in the surface of flashing chamber liquid level; And the evaporation on liquid level surface is violent more than liquid level inside, thereby evaporation effect that should design will be fine, generally in solution arrives flashing chamber in the middle part of the liquid level time; Solvent in the solution evaporates basically, and this moment, the concentration of effusive concentrated feed liquid just can evenly and reach requirement.Therefore the present invention can realize the flash distillation effect.
2, a kind of concentrating unit that is used for wet phosphoric acid refining of the present invention is provided with the air pressure lock-in tube at the position that concentrates nearly flashing chamber on the feed liquid outlet pipe; The other end of this air pressure lock-in tube and flashing chamber inside or atmosphere; When this device was applied to negative pressure forced circulation evaporation system, the other end of air pressure lock-in tube communicated with flashing chamber inside; When this device is applied to normal pressure forced circulation evaporation system, the other end of air pressure lock-in tube and atmosphere; This air pressure lock-in tube can be avoided concentrating the feed liquid outlet pipe flashing chamber is produced siphonic effect, promptly prevents to concentrate the feed liquid outlet pipe feed liquid in the flashing chamber is aspirated away, thereby guarantee normally carrying out of forced circulation evaporation.Therefore the present invention can effectively prevent the generation of siphonic effect.
3, a kind of concentrating unit that is used for wet phosphoric acid refining of the present invention is respectively arranged with skimmer tube and cyclonic separator inside and outside flashing chamber; Skimmer tube is connected with the secondary steam outlet; The other end of secondary steam outlet is connected with cyclonic separator, and the other end of cyclonic separator is connected with the condensation liquid bath through condensing surface, and the condensation liquid bath is provided with and connects vacuum port; During use; Through skimmer tube the tiny liquid pearl of feed liquid of overflowing is run foul of each other earlier and fall after rise in the flashing chamber to become big drop, avoid the tiny liquid pearl of feed liquid to overflow with secondary steam, this be preliminary collection feed liquid foam; Collect the feed liquid foam once more to reclaim the pump circulation system through the cyclonic separator that increases on the pipeline between secondary steam outlet, the condensing surface again, this is two steps to collect the feed liquid foam; Through these two collection steps, can effectively avoid the tiny liquid pearl of feed liquid to overflow with secondary steam, avoid waste.Therefore the tiny liquid pearl of feed liquid among the present invention is difficult for overflowing with secondary steam.
4, a kind of concentrating unit that is used for wet phosphoric acid refining of the present invention is provided with vapour pipe in nearly flashing chamber bottom; This vapour pipe comprises interconnective straight tube and endless tube; One end of the straight tube endless tube inner with being positioned at flashing chamber is connected; The other end extends to the outside of flashing chamber; And on endless tube, evenly be provided with a plurality of steam holes, the purpose of this vapour pipe design is to feed steam when needed, thereby satisfies the needs of wet phosphoric acid refining technology normal pressure or negative pressure recover solvent, evaporation concentration, stripping defluorinate or stripping recovery extraction agent.Therefore the present invention can satisfy the needs of wet phosphoric acid refining technology normal pressure or negative pressure recover solvent, evaporation concentration, stripping defluorinate or stripping recovery extraction agent.
5, a kind of concentrating unit that is used for wet phosphoric acid refining of the present invention can be realized the negative pressure forced circulation evaporation, can realize the normal pressure forced circulation evaporation again, and in wet phosphoric acid refining technology; Usually need the consecutive evaporation operation of normal pressure, negative pressure, the present invention need not change structure formation, only needs the adjustment operating parameters; Just can tackle different evaporation demands; As carry out normal pressure earlier and reclaim solvent, after the end, carry out negative pressure again and concentrate; Meet the job requirement of wet phosphoric acid refining technology fully, so can form serialization production.Therefore the present invention can adapt to normal pressure and negative pressure evaporation operation, and can realize continuous operation.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of flashing chamber among Fig. 1.
Fig. 3 is the structural representation of skimmer tube among Fig. 2.
Fig. 4 is the upward view of Fig. 2 middle steam tube.
Fig. 5 is the structural representation of embodiment 2 among the present invention.
Among the figure: flashing chamber 1; Forced circulation pump 2; Well heater 3; Secondary steam outlet 4; Following circulation tube 5; Opening for feed 51; Upper circular tube 6; The upper circular tube mouth of pipe 61; Concentrate feed liquid outlet pipe 7; Concentrate feed liquid bath 71; Concentrate pipe 8 in the feed liquid; Inner spout 81; Air pressure lock-in tube 9; Lock-in tube inner spout 91; Skimmer tube 10; Pipe portion 101; Conus portion 102; Pipe tap 103; Cyclonic separator 11; Condensing surface 12; Condensation liquid bath 13; Connect vacuum port 131; Vapour pipe 14; Straight tube 141; Endless tube 142; Steam hole 143.
Embodiment
Below in conjunction with description of drawings and embodiment the present invention is done further detailed explanation.
Referring to figure 1 – Fig. 5; A kind of concentrating unit that is used for wet phosphoric acid refining; Comprise flashing chamber 1, forced circulation pump 2 and well heater 3, the two ends up and down of said flashing chamber 1 are respectively arranged with secondary steam outlet 4 and following circulation tube 5, and the left and right sides is respectively arranged with upper circular tube 6 and concentrated feed liquid outlet pipe 7; The other end that concentrates feed liquid outlet pipe 7 communicates with concentrate feed liquid bath 71; The said the other end of circulation tube 5 down is connected with forced circulation pump 2, and the other end of forced circulation pump 2 is connected with well heater 3, and the other end of well heater 3 is connected with upper circular tube 6; The upper circular tube mouth of pipe 61 of upper circular tube 6 the other ends is connected with flashing chamber 1, and the position of nearly forced circulation pump 2 is provided with opening for feed 51 on following circulation tube 5;
Said concentrating unit also comprises pipe 8 in the concentrated feed liquid that is arranged at flashing chamber 1 inside; One end that should concentrate pipe 8 in the feed liquid is connected with concentrated feed liquid outlet pipe 7; The other end is the inner spout 81 after extending below; Inner spout 81 nearly flashing chambers 1 bottom is provided with, and the height of inner spout 81 is lower than the upper circular tube mouth of pipe 61.
The position of nearly flashing chamber 1 is provided with air pressure lock-in tube 9, the other end of this air pressure lock-in tube 9 and flashing chamber 1 inside or atmosphere on the said concentrated feed liquid outlet pipe 7.
The other end of said air pressure lock-in tube 9 is provided with the lock-in tube inner spout 91 that communicates with flashing chamber 1 inside, and the height of this lock-in tube inner spout 91 is higher than the upper circular tube mouth of pipe 61.
Said concentrating unit also comprises skimmer tube 10 that is arranged at flashing chamber 1 inside and the cyclonic separator 11 that is arranged at flashing chamber 1 outside; Skimmer tube 10 is connected with secondary steam outlet 4; The other end of secondary steam outlet 4 is connected with cyclonic separator 11; The other end of cyclonic separator 11 is connected with condensation liquid bath 13 through condensing surface 12, and condensation liquid bath 13 is provided with and connects vacuum port 131.
Said pipe tap 103 be shaped as circle, ellipse, trilateral or Polygons.
Said concentrating unit also comprises the vapour pipe 14 that nearly flashing chamber 1 bottom is provided with; This vapour pipe 14 comprises interconnective straight tube 141 and endless tube 142; One end of straight tube 141 is connected with the endless tube 142 that is positioned at flashing chamber 1 inside; The other end extends to the outside of flashing chamber 1, and on endless tube 142, evenly is provided with a plurality of steam holes 143.
Said steam hole 143 be shaped as circle, ellipse, trilateral or Polygons.
Principle of the present invention is explained as follows:
1, realize the flash distillation effect:
The present invention has in the concentrated feed liquid in the set inside of flashing chamber 1 and manages 8, and an end of pipe 8 is connected with concentrated feed liquid outlet pipe 7 in this concentrated feed liquid, and the other end is the inner spout 81 after extending below; Inner spout 81 nearly flashing chambers 1 bottom is provided with; The height of inner spout 81 is lower than the upper circular tube mouth of pipe 61, during use, has difference of altitude between the upper circular tube mouth of pipe 61 and the inner spout 81; The surface that this difference of altitude can make is 61 that flow to from the upper circular tube mouth of pipe, solution that heating is just come out can be arranged in flashing chamber 1 liquid level (referring to flashing chamber 1 existing feed liquid); Rather than being positioned at the inside of liquid level, the evaporation on liquid level surface is violent more than liquid level inside, opposite after all; If the height of inner spout 81 is higher than the upper circular tube mouth of pipe 61; Then will directly get into the inside of liquid level from the upper circular tube mouth of pipe 61 solution that flow to, that heating is just come out, the top that just flow to solution this moment will be covered by existing feed liquid, and evaporation effect is very poor naturally.Therefore the design's evaporation effect is fine, and generally when just flowing to solution when arriving in the flashing chamber 1 the liquid level middle part, the solvent that has just flow in the solution just evaporates basically, and the concentration of effusive concentrated feed liquid just can evenly and reach requirement at this moment.The design's core is the difference of altitude between the upper circular tube mouth of pipe 61 and the inner spout 81, and this difference of altitude is the bigger the better.
2, prevent siphon:
Concentrate the straight-through concentrate feed liquid bath 71 of extension pipeline of feed liquid outlet pipe 7 among the present invention,, aspirate away the feed liquid in the flashing chamber 1 with regard to being easy to generate siphonic effect like this, hinder normally carrying out of forced circulation evaporation far below the liquid level in the flashing chamber 1.For addressing this problem; Just must avoid the formation of siphonic effect; For this reason, the present invention is provided with air pressure lock-in tube 9, the other end of this air pressure lock-in tube 9 and flashing chamber 1 inside or atmosphere at the position that concentrates nearly flashing chamber 1 on the feed liquid outlet pipe 7; Particular case is: when this device is applied to negative pressure forced circulation evaporation system; The other end of air pressure lock-in tube 9 communicates through the inside of lock-in tube inner spout 91 with flashing chamber 1, makes concentrated feed liquid outlet pipe 7 identical with the air pressure of flashing chamber 1 inside, thereby avoids the formation of siphonic effect; When this device is applied to normal pressure forced circulation evaporation system; The other end of air pressure lock-in tube 9 and atmosphere, and flashing chamber 1 is worked under normal pressure, thereby it is identical with the air pressure of flashing chamber 1 inside to concentrate feed liquid outlet pipe 7 this moment; Be normal pressure all, thereby avoid the formation of siphonic effect.
3, the tiny liquid pearl of feed liquid is difficult for overflowing with secondary steam:
Feed liquid is mobile very fast in the forced circulation evaporation process; The evaporation of feed liquid is also relatively more violent; The tiny liquid integument secondary steam that has feed liquid during evaporation is unavoidably carried secretly away; Thereby cause waste, for preventing the generation of this situation, the present invention is respectively arranged with skimmer tube 10, cyclonic separator 11 to collect the tiny liquid pearl of feed liquid inside and outside flashing chamber 1.Wherein, Skimmer tube 10 is connected with secondary steam outlet 4; The other end of secondary steam outlet 4 is connected with cyclonic separator 11, and the other end of cyclonic separator 11 is connected with condensation liquid bath 13 through condensing surface 12, and condensation liquid bath 13 is provided with and connects vacuum port 131.Owing to evenly be provided with a plurality of pipe taps 103 on the tube wall of skimmer tube 10; Thereby can let evaporative air converge to the center; Thereby can let liquid foam as much as possible run foul of each other like this to become big drop to fall gets back in the flashing chamber 1; The effect of conus portion 102 is exactly to collect these big drops, and this is the preliminary feed liquid foam of collecting; Collect the feed liquid foam once more to reclaim the pump circulation system through the cyclonic separator 11 that increases on the pipeline between secondary steam outlet 4, the condensing surface 12 again, this is two steps to collect the feed liquid foam; Through these two collection steps, can effectively avoid the tiny liquid pearl of feed liquid to overflow with secondary steam, avoid waste.The shape of pipe tap 103 is generally circle, ellipse, trilateral or Polygons, adjusts according to the intelligence-collecting object situation of reality.
4, satisfy stripping defluorinate or stripping and reclaim the extraction agent needs:
The present invention is provided with vapour pipe 14 at the position of nearly flashing chamber 1 bottom; This vapour pipe 14 comprises interconnective straight tube 141 and endless tube 142; One end of straight tube 141 is connected with the endless tube 142 that is positioned at flashing chamber 1 inside, and the other end extends to the outside of flashing chamber 1, and on endless tube 142, evenly is provided with a plurality of steam holes 143; The purpose of these vapour pipe 14 designs is to feed steam when needed; Utilize steam in feed liquid, to produce bubble, and these bubbles can impel solvent or fluorine in the feed liquid to overflow with bubble, thereby satisfy the needs of wet phosphoric acid refining technology normal pressure or negative pressure recover solvent, evaporation concentration, stripping defluorinate or stripping recovery extraction agent.The shape of steam hole 143 is generally circle, ellipse, trilateral or Polygons, adjusts according to actual needs.
5, can form serialization production:
In wet phosphoric acid refining technology, need handle various feed liquids through the mode that normal pressure reclaims solvent and negative pressure concentrated phosphoric acid.Such as, the solvent in extraction tail washings, wash water and the strip liquor is reclaimed and need under normal pressure, carry out; To then need under negative pressure, carrying out through the concentrating of strip liquor of reclaiming solvent; When the vaporizing extract process defluorinate, both can adopt normal pressure also can adopt negative pressure.This evaporation unit that just requires to be applied to wet phosphoric acid refining technology must can be realized the negative pressure forced circulation evaporation, can realize the normal pressure forced circulation evaporation again.The present invention can address that need fully, no matter is under normal pressure, still under negative pressure; Need not change structure formation; Only need the adjustment operating parameters, that just can guarantee to evaporate carries out smoothly, can not only realize the flash distillation effect, prevent siphon; And can guarantee that the stripping defluorinate is not overflowed, can be satisfied to the tiny liquid pearl of feed liquid with secondary steam or stripping reclaims the extraction agent needs, thereby form serialization production.Thereby the present invention can adapt to normal pressure and negative pressure evaporation is operated, can be realized continuous operation, satisfies the requirement of wet phosphoric acid refining technology fully.
Referring to Fig. 1; The vacuum port 131 that connects on the condensation liquid bath 13 is connected also open vacuum system with vacuum system; Need to concentrate feed liquid and get into the forced circulation evaporation system through opening for feed 51; After forced circulation pump 2 is sent into well heater 3 heating, is heated to certain temperature, get into flashing chamber 1, in flashing chamber 1, discharge secondary steam through the feed liquid that heats; Secondary steam after skimmer tube 10 preliminary collection liquid foams, cyclonic separator 11 secondary foam removals, is condensed into phlegma and flows into phlegma groove 13 successively in condensing surface 12.Remove fluorine, chlorine like need, then open the logical steam of the feed liquid of vapour pipe 14 in flashing chamber 1, can impel the effusion of fluorine, chlorine.
Feed liquid is after pervaporation; The feed liquid that reaches desired concn is owing to the suction of forced circulation pump 2 flows downward, and major part flows back to forced circulation pump 2 again and circulates once more, and few part then goes out flashing chamber 1 through concentrating 7 overflows of feed liquid outlet pipe; Get into concentrate feed liquid bath 71, accomplish concentrating.Because (air pressure lock-in tube 9 is provided with the lock-in tube inner spout 91 that communicates with flashing chamber 1 inside to air pressure lock-in tube 9 at this moment; And the height of lock-in tube inner spout 91 is higher than the liquid level and the upper circular tube mouth of pipe 61) effect; Feed liquid in the flashing chamber 1 can not taken away because of siphonic effect, thereby has stablized the liquid level in the flashing chamber 1.
Referring to Fig. 5; Need to concentrate feed liquid and get into the forced circulation evaporation system through opening for feed 51; After forced circulation pump 2 is sent into well heater 3 heating, is heated to certain temperature, get into flashing chamber 1, in flashing chamber 1, discharge secondary steam through the feed liquid that heats; Secondary steam after skimmer tube 10 preliminary collection liquid foams, cyclonic separator 11 secondary foam removals, is condensed into phlegma and flows into phlegma groove 13 successively in condensing surface 12.Remove fluorine, chlorine or reclaim extraction agent like need, then open the logical steam of the feed liquid of vapour pipe 14 in flashing chamber 1, can impel the effusion of fluorine, chlorine and extraction agent.
Feed liquid is after pervaporation; The feed liquid that reaches desired concn is owing to the suction of forced circulation pump 2 flows downward, and major part flows back to forced circulation pump 2 again and circulates once more, and few part then goes out flashing chamber 1 through concentrating 7 overflows of feed liquid outlet pipe; Get into concentrate feed liquid bath 71, accomplish concentrating.Because the effect of air pressure lock-in tube 9 (this moment air pressure lock-in tube 9 and atmosphere), the feed liquid in the flashing chamber 1 can not taken away because of siphonic effect, thereby has stablized the liquid level in the flashing chamber 1.
The above is merely preferred embodiments of the present invention; Protection scope of the present invention is not exceeded with above-mentioned embodiment; As long as the equivalence that those of ordinary skills do according to disclosed content is modified or changed, all should include in the protection domain of putting down in writing in claims.
Claims (9)
1. concentrating unit that is used for wet phosphoric acid refining; Comprise flashing chamber (1), forced circulation pump (2) and well heater (3); The two ends up and down of said flashing chamber (1) are respectively arranged with secondary steam outlet (4) and following circulation tube (5); The left and right sides is respectively arranged with upper circular tube (6) and concentrated feed liquid outlet pipe (7); The other end that concentrates feed liquid outlet pipe (7) communicates with concentrate feed liquid bath (71), and the said the other end of circulation tube (5) down is connected with forced circulation pump (2), and the other end of forced circulation pump (2) is connected with well heater (3); The other end of well heater (3) is connected with upper circular tube (6); The upper circular tube mouth of pipe (61) of upper circular tube (6) the other end is connected with flashing chamber (1), and is provided with opening for feed (51) at the position that following circulation tube (5) is gone up nearly forced circulation pump (2), it is characterized in that:
Said concentrating unit also comprises being arranged in the inner concentrated feed liquid of flashing chamber (1) manages (8); One end that should concentrate pipe (8) in the feed liquid is connected with concentrated feed liquid outlet pipe (7); The other end is the inner spout (81) after extending below; The bottom of the nearly flashing chamber (1) of inner spout (81) is provided with, and the height of inner spout (81) is lower than the upper circular tube mouth of pipe (61).
2. a kind of concentrating unit that is used for wet phosphoric acid refining according to claim 1 is characterized in that: pipe (8) is along the inwall setting of flashing chamber (1) in the said concentrated feed liquid.
3. a kind of concentrating unit that is used for wet phosphoric acid refining according to claim 1 and 2; It is characterized in that: the position that said concentrated feed liquid outlet pipe (7) is gone up nearly flashing chamber (1) is provided with air pressure lock-in tube (9), the other end of this air pressure lock-in tube (9) and flashing chamber (1) inside or atmosphere.
4. a kind of concentrating unit that is used for wet phosphoric acid refining according to claim 3; It is characterized in that: the other end of said air pressure lock-in tube (9) is provided with the lock-in tube inner spout (91) that communicates with flashing chamber (1) inside, and the height of this lock-in tube inner spout (91) is higher than the upper circular tube mouth of pipe (61).
5. a kind of concentrating unit that is used for wet phosphoric acid refining according to claim 1 and 2; It is characterized in that: said concentrating unit also comprises the cyclonic separator (11) that is arranged at the inner skimmer tube (10) of flashing chamber (1) and is arranged at flashing chamber (1) outside; Skimmer tube (10) is connected with secondary steam outlet (4); The other end of secondary steam outlet (4) is connected with cyclonic separator (11); The other end of cyclonic separator (11) is connected with condensation liquid bath (13) through condensing surface (12), and condensation liquid bath (13) is provided with and connects vacuum port (131).
6. a kind of concentrating unit that is used for wet phosphoric acid refining according to claim 5; It is characterized in that: said skimmer tube (10) comprises interconnective pipe portion (101) and conus portion (102); Conus portion (102) is connected with the bottom of pipe portion (101); The top of pipe portion (101) is connected with secondary steam outlet (4), and on the tube wall of pipe portion (101), evenly is provided with a plurality of pipe taps (103).
7. a kind of concentrating unit that is used for wet phosphoric acid refining according to claim 6 is characterized in that: said pipe tap (103) be shaped as circle, ellipse, trilateral or Polygons.
8. a kind of concentrating unit that is used for wet phosphoric acid refining according to claim 1 and 2; It is characterized in that: said concentrating unit also comprises the vapour pipe (14) that nearly flashing chamber (1) bottom is provided with; This vapour pipe (14) comprises interconnective straight tube (141) and endless tube (142); One end of straight tube (141) endless tube (142) inner with being positioned at flashing chamber (1) is connected; The other end extends to the outside of flashing chamber (1), and on endless tube (142), evenly is provided with a plurality of steam holes (143).
9. a kind of concentrating unit that is used for wet phosphoric acid refining according to claim 8 is characterized in that: said steam hole (143) be shaped as circle, ellipse, trilateral or Polygons.
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| CN102674281A (en) * | 2012-05-14 | 2012-09-19 | 瓮福（集团）有限责任公司 | Phosphoric acid refining device |
| CN102863267A (en) * | 2012-09-08 | 2013-01-09 | 湖北三宁化工股份有限公司 | Method for producing monoammonium phosphate and coproducing N-P binary compound fertilizer by using wet-process phosphoric acid |
| CN103523763A (en) * | 2013-10-11 | 2014-01-22 | 徐州天正活性炭厂 | Energy saving apparatus and method for rapid concentration of dilute phosphoric acid |
| CN104555976A (en) * | 2014-12-24 | 2015-04-29 | 瓮福（集团）有限责任公司 | Acidic condensate using method |
| CN107128888A (en) * | 2017-04-17 | 2017-09-05 | 中国五环工程有限公司 | Technical grade polyphosphoric acid production technology and its system |
| CN108992951A (en) * | 2018-09-18 | 2018-12-14 | 贵州兰鑫石墨机电设备制造有限公司 | A kind of phosphoric acid vacuum concentrating apparatus |
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| CN107445229A (en) * | 2017-08-05 | 2017-12-08 | 周维民 | A kind of feces of livestock and poultry penetrating fluid reclaims enrichment facility |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102674281A (en) * | 2012-05-14 | 2012-09-19 | 瓮福（集团）有限责任公司 | Phosphoric acid refining device |
| CN102674281B (en) * | 2012-05-14 | 2013-08-07 | 瓮福（集团）有限责任公司 | Phosphoric acid refining device |
| CN102863267A (en) * | 2012-09-08 | 2013-01-09 | 湖北三宁化工股份有限公司 | Method for producing monoammonium phosphate and coproducing N-P binary compound fertilizer by using wet-process phosphoric acid |
| CN103523763A (en) * | 2013-10-11 | 2014-01-22 | 徐州天正活性炭厂 | Energy saving apparatus and method for rapid concentration of dilute phosphoric acid |
| CN103523763B (en) * | 2013-10-11 | 2017-04-05 | 徐州天正活性炭厂 | A kind of energy saver and method of rapid concentration of dilute phosphoric acid |
| CN104555976A (en) * | 2014-12-24 | 2015-04-29 | 瓮福（集团）有限责任公司 | Acidic condensate using method |
| CN107128888A (en) * | 2017-04-17 | 2017-09-05 | 中国五环工程有限公司 | Technical grade polyphosphoric acid production technology and its system |
| CN108992951A (en) * | 2018-09-18 | 2018-12-14 | 贵州兰鑫石墨机电设备制造有限公司 | A kind of phosphoric acid vacuum concentrating apparatus |
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