CN108671571A - Phosphoric Acid Concentration system and technique - Google Patents
Phosphoric Acid Concentration system and technique Download PDFInfo
- Publication number
- CN108671571A CN108671571A CN201810761762.1A CN201810761762A CN108671571A CN 108671571 A CN108671571 A CN 108671571A CN 201810761762 A CN201810761762 A CN 201810761762A CN 108671571 A CN108671571 A CN 108671571A
- Authority
- CN
- China
- Prior art keywords
- phosphoric acid
- falling film
- knockout drum
- acid concentration
- film evaporator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/234—Purification; Stabilisation; Concentration
- C01B25/2343—Concentration concomitant with purification, e.g. elimination of fluorine
- C01B25/2346—Concentration
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The present invention relates to chemical fields, in particular to Phosphoric Acid Concentration system and technique.Phosphoric Acid Concentration system includes：Stage falling-film evaporation section is delivered to the charging of falling film evaporator top by circulating pump, and phosphoric acid,diluted enters heat exchanger tube after distributor is uniformly distributed, heated through saturated vapor, and phosphoric acid,diluted declines and vaporizes in heat exchanger tube, finally carries out gas-liquid separation in knockout drum.The phosphoric acid of initial concentration enters the knockout drum of two level falling film evaporation workshop section through cycle concentration pipeline, and the charging of two level falling film evaporator top is delivered to by circulating pump；Dual evaporation operates under vacuum, can reduce the operation temperature of high-concentration phosphoric acid evaporation.Phosphoric Acid Concentration system operation context is good, especially evaporates after the gas phase condensed device condensation of generation almost without three waste discharge, environmental emission reduction.It is concentrated by stage falling-film evaporation section, vacuumizing coordinates the cooperation of two level falling film evaporation workshop section, and forced circulation falling film evaporation can be by Phosphoric Acid Concentration to 100%.
Description
Technical field
The present invention relates to chemical fields, in particular to a kind of Phosphoric Acid Concentration system and technique.
Background technology
Its production capacity of two wet technologies production phosphoric acid accounts for about the 88% of phosphoric acid by wet process total productive capacity, but product design is only
Have 26%~32% (with P2O5Meter), and it is 45% (with P that while producing high concentration fertilizer, which requires phosphoric acid concentration,2O5Meter) more than, therefore
Phosphoric acid,diluted has to pass through concentration.
The concentration of phosphoric acid is considered as a kind of technique of difficulty, has impurity constantly to increase and analyse with phosphoric acid concentration in phosphoric acid,diluted
Go out, and be deposited on wall surface, in addition there is also exhaust-gas treatment and final phosphoric acid concentration be not high during Phosphoric Acid Concentration
Problem.
Invention content
The purpose of the present invention is to provide a kind of Phosphoric Acid Concentration system and technique, it is intended to improve existing Phosphoric Acid Concentration mistake
It there is a problem that exhaust-gas treatment and final phosphoric acid concentration be not high in journey.
The present invention provides a kind of technical solution：
A kind of Phosphoric Acid Concentration system, Phosphoric Acid Concentration system include：
Stage falling-film evaporation section, stage falling-film evaporation section include the first falling film evaporator, the
One knockout drum, first circulation pump, the first knockout drum pass through first circulation pump and the first falling film evaporator
Connection, the outlet of the first falling film evaporator is connected to the first knockout drum；
Two level falling film evaporation workshop section, two level falling film evaporation workshop section include the second falling film evaporator, the second knockout drum, the
Two circulating pumps, vacuum subassembly, the second knockout drum are pumped by second circulation and are connect with the second falling film evaporator, and the second falling liquid film steams
The outlet of hair device is connected to the second knockout drum；Vacuum subassembly is connect with the second knockout drum；
First circulation pump is connect by pipeline with the second knockout drum.
In other embodiments of the invention, above-mentioned stage falling-film evaporation section further includes the first condenser, the first condensation
Device is connect with the gas vent of the first falling film evaporator.
In other embodiments of the invention, spray assemblies are provided at the gas access of above-mentioned first condenser, it is described
Spray assemblies are connect with condensate pump.
In other embodiments of the invention, above-mentioned two level falling film evaporation workshop section further includes the second condenser, the second condensation
Device is connect with the second knockout drum.
In other embodiments of the invention, spray assemblies are provided at the gas access of above-mentioned second condenser, it is described
Spray assemblies are connect with condensate pump.
In other embodiments of the invention, above-mentioned vacuum subassembly is connect with the gas vent of the second condenser.
In other embodiments of the invention, above-mentioned first falling film evaporator, the second falling film evaporator heat exchanger tube be
Silicon carbide layer heat exchanger tube.
In other embodiments of the invention, the outlet of above-mentioned second circulation pump is connected with phosphoric acid outlet conduit.
In other embodiments of the invention, above-mentioned first circulation pump, second circulation pump are PFA alloy pumps.
The present invention also provides a kind of technical solutions：
A kind of Phosphoric Acid Concentration technique includes mainly：
Phosphoric acid,diluted is detached by the first knockout drum, and liquid phase is delivered to the first falling film evaporator by first circulation pump and steams
Hair, liquid phase turn again to the separation of the first knockout drum, are recycled；
After recycling a period of time, the liquid phase of the first knockout drum enters the second knockout drum point by first circulation pump
From, liquid phase is delivered to the second falling film evaporator by second circulation pump and evaporates, and liquid phase turns again to the separation of the second knockout drum,
Second knockout drum is connected with vacuum subassembly, carries out being evaporated in vacuo cycle concentration.
The advantageous effect of Phosphoric Acid Concentration system and technique provided in an embodiment of the present invention is：
Use silicon carbide heat exchanger tube for the film evaporator of main heat exchange element, silicon carbide material thermal conductivity is high, comprehensive resistance to
Corrosive nature can completely avoid the corrosion containing other strong corrosive medias such as sulfuric acid, fluosilicic acid in phosphoric acid, which is it
His material heat exchanger is irreplaceable.
Low temperature cold condensate is delivered to condenser inlet pipeline by condensate pump, and is sprayed to gas phase pipeline by atomizer
Leaching can directly reduce the gas inlet temperature of condenser, protect condenser relatively low corrosion rate under acid working condition, prolong
The service life of long equipment.The indirect steam that Phosphoric Acid Concentration evaporation generates cooling down before entering condenser, while to two
The impurity such as the fluosilicic acid of secondary entrainment with steam have the effect of washing, purifying.
Two level falling film evaporation workshop section operates under vacuum, can reduce the operation temperature of high-concentration phosphoric acid evaporation, make
More phosphoric acid enter liquid phase when vapor liquid equilibrium, increase thickening efficiency.
Phosphoric Acid Concentration system operation context is good, especially evaporates after the gas phase condensed device condensation of generation almost without the three wastes
Discharge, environmental emission reduction.It is concentrated by stage falling-film evaporation section, vacuumizing coordinates the cooperation of two level falling film evaporation workshop section, by force
System cycle falling film evaporation can be by Phosphoric Acid Concentration to 100%.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows Phosphoric Acid Concentration system process figure provided in an embodiment of the present invention,
Fig. 2 shows the process flow chart of stage falling-film evaporation section provided in an embodiment of the present invention,
Fig. 3 shows the process flow chart of two level falling film evaporation provided in an embodiment of the present invention workshop section,
Fig. 4 shows the structural schematic diagram of vacuum subassembly provided in an embodiment of the present invention.
Icon：100- Phosphoric Acid Concentration systems；110- stage falling-film evaporation sections；The first falling film evaporators of 111-；112-
One knockout drum；113- first circulations pump；The first condensers of 114-；120- two level falling film evaporations workshop section；The second falling liquid films of 121-
Evaporator；The second knockout drums of 122-；123- second circulations pump；The second condensers of 124-；125- vacuum subassemblies.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the embodiment of the present invention, it is to be understood that the orientation or positional relationship of instruction is based on attached drawing institute
The orientation or positional relationship the shown invention product using when the orientation or positional relationship or ability usually put
The orientation or positional relationship that field technique personnel usually understand, is merely for convenience of description of the present invention and simplification of the description, without referring to
Show or imply that signified equipment or element must have a particular orientation, with specific azimuth configuration and operation, therefore cannot manage
Solution is limitation of the present invention.
In addition, term " first ", " second " etc. are only used for distinguishing description, it is not understood to indicate or imply relatively important
Property.
In the description of the embodiment of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term
" setting ", " installation ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be directly connected, can also can be indirectly connected through an intermediary the connection inside two elements.
For the ordinary skill in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Embodiment
During Phosphoric Acid Concentration, with P2O5The raising of concentration, sludge fouling and equipment pipe are rotten on heater heating surface
Erosion problem, influences heat transfer property and service life of equipment；Phosphoric acid by wet process has forced circulation vacuum evaporation using steam indirectly heat
Tubular heat exchanger concentrates, and phosphoric acid quality score is in 0~76%P2O5When, vapor is only existed in balance gas phase when boiling, is managed
By above can be by Phosphoric Acid Concentration to very high concentration, but with the raising of phosphoric acid concentration, while certain impurity compositions in dilute sulfuric acid
Precipitation is precipitated since solubility reduces, as a result the viscosity of phosphoric acid rises so that Phosphoric Acid Concentration is become difficult.Existing phosphorus
Dilute sulfuric acid can not be concentrated into 100% concentration by sour concentration technique.Therefore, the embodiment of the present invention provides a kind of Phosphoric Acid Concentration system
100。
Fig. 1 shows 100 process flow chart of Phosphoric Acid Concentration system provided in an embodiment of the present invention, please refers to Fig.1.This implementation
Example provides a kind of Phosphoric Acid Concentration system 100, is mainly used for Phosphoric Acid Concentration.
Phosphoric Acid Concentration system 100 includes stage falling-film evaporation section 110, two level falling film evaporation workshop section 120, and stage falling-film steams
Hair workshop section 110 is connect by pipeline with two level falling film evaporation workshop section 120.
Fig. 2 shows the process flow charts of stage falling-film evaporation section 110 provided in an embodiment of the present invention, please refer to Fig. 2.
Stage falling-film evaporation section 110 includes the first falling film evaporator 111, the first knockout drum 112, first circulation pump
113, the first knockout drum 112 is connect by first circulation pump 113 with the first falling film evaporator 111, the first falling film evaporator
111 outlet is connected to the first knockout drum 112.
In the present embodiment, the heat exchanger tube of the first falling film evaporator 111 is silicon carbide heat exchanger tube, stage falling-film evaporation section
110 use silicon carbide heat exchanger tube for the first falling film evaporator 111 of main heat exchange element, and silicon carbide material thermal conductivity is high, comprehensively
Corrosion resistance can completely avoid the corrosion containing other strong corrosive medias such as sulfuric acid, fluosilicic acid in phosphoric acid, the advantage
It is that other materials heat exchanger is irreplaceable.
The liquid outlet of first knockout drum 112 is delivered to the first falling film evaporator 111 by first circulation pump 113,
Phosphoric acid,diluted enters silicon carbide heat exchanger tube after the distributor of the first falling film evaporator 111 is uniformly distributed, and is heated through saturated vapor, dilute
Phosphoric acid declines and vaporizes in silicon carbide heat exchanger tube, finally in 112 gas-liquid separation of the first knockout drum.
Further, in the present embodiment, stage falling-film evaporation section 110 further includes the first condenser 114, the first condensation
Device 114 is connect with the gas vent of the first falling film evaporator 111.
From the above, the vapor that the evaporation of the first falling film evaporator 111 generates enters the first condenser through gas phase pipeline
114, enter condensate water pot (not marked in figure) after vapor condensation, on-condensible gas is by exhausting pipeline discharge system.
In the present embodiment, be provided with spray assemblies at the gas access of the first condenser 114, the spray assemblies with it is cold
Lime set pump connection.In the present embodiment, condensate liquid is condensed water, and in other embodiments of the invention, condensate liquid may be
Other cooling mediums.
Spray assemblies are provided at the gas access of first condenser 114, in other words, the gas of the first condenser 114 enters
Mouth is provided with condensate liquid spray assemblies, and condensate liquid cools down to the gas phase for entering the first condenser 114 in the form of being atomized, after atomization
Condensate liquid directly mixed with gas phase.It is directly cooling to the gas of the first falling film evaporator 111.
Low temperature cold condensate is delivered to 114 inlet pipeline of the first condenser by condensate pump, and by atomizer to gas
Phase pipeline sprays, and can directly reduce the gas inlet temperature of the first condenser 114, protection condenser is under acid working condition
Relatively low corrosion rate extends the service life of equipment.
In the present embodiment, first circulation pump 113 is PFA alloy pumps.In other embodiments of the invention, first circulation
Pump 113 or other pumps.
Big flow circulating and evaporating is forced using PFA alloy pumps, vaporization rate when reducing Phosphoric Acid Concentration evaporation, it is possible to reduce dilute phosphorus
Acid is in concentration process because in vaporization entrainment to gas phase.
Phosphoric acid,diluted can be concentrated to 65% by stage falling-film evaporation section 110.
Fig. 3 shows the process flow chart of two level falling film evaporation provided in an embodiment of the present invention workshop section 120, please refers to Fig. 3.
Two level falling film evaporation workshop section 120 includes the second falling film evaporator 121, the second knockout drum 122, second circulation pump
123, vacuum subassembly 125, the second knockout drum 122 are connect by second circulation pump 123 with the second falling film evaporator 121, the
The outlet of two falling film evaporators 121 is connected to the second knockout drum 122.Vacuum subassembly 125 and the second knockout drum 122 connect
It connects；Vacuum subassembly 125 makes two level falling film evaporation workshop section 120 be run under two fixed vacuum degrees.
First circulation pump 113 is connect by pipeline with the second knockout drum 122.In other words, stage falling-film evaporation section
After 110 cycle a period of times, the liquid phase of the first knockout drum 112 is delivered to the second gas-liquid separation by first circulation pump 113
Tank 122.
In the present embodiment, the heat exchanger tube of the second falling film evaporator 121 is silicon carbide heat exchanger tube, two level falling film evaporation workshop section
120 use silicon carbide heat exchanger tube for the second falling film evaporator 121 of main heat exchange element, and silicon carbide material thermal conductivity is high, comprehensively
Corrosion resistance can completely avoid the corrosion containing other strong corrosive medias such as sulfuric acid, fluosilicic acid in phosphoric acid, the advantage
It is that other materials heat exchanger is irreplaceable.
The liquid outlet of second knockout drum 122 is delivered to the second falling film evaporator 121 by second circulation pump 123,
Phosphoric acid,diluted enters silicon carbide heat exchanger tube after the distributor of the second falling film evaporator 121 is uniformly distributed, and is heated through saturated vapor, dilute
Phosphoric acid declines and vaporizes in silicon carbide heat exchanger tube, finally in 122 gas-liquid separation of the second knockout drum.
Vacuum subassembly 125 makes two level falling film evaporation workshop section 120 be run under two fixed vacuum degrees.Two level falling film evaporation workshop section
120 operate under vacuum, can reduce the operation temperature of high-concentration phosphoric acid evaporation, when making vapor liquid equilibrium more phosphoric acid into
Enter liquid phase, increases thickening efficiency.
Further, in the present embodiment, two level falling film evaporation workshop section 120 further includes the second condenser 124, the second condensation
Device 124 is connect with the gas vent of the second falling film evaporator 121.
From the above, the vapor that the evaporation of the second falling film evaporator 121 generates enters the second condenser through gas phase pipeline
124, enter condensate water pot (not marked in figure) after vapor condensation, on-condensible gas is by exhausting pipeline discharge system.Liquid phase phosphoric acid
Required concentration is concentrated by second circulation 123 continuous forced-circulation evaporations of pump and is drained into out-of-bounds.
Further, vacuum subassembly 125 is connect with the gas vent of the second condenser 124.On-condensible gas enters vacuum group
Part 125 makes the second condenser 124 have the function of vacuum buffer.
In the present embodiment, be provided with spray assemblies at the gas access of the second condenser 124, the spray assemblies with it is cold
Lime set pump connection.In the present embodiment, condensate liquid is condensed water, and in other embodiments of the invention, condensate liquid may be
Other cooling mediums.
Spray assemblies are provided at the gas access of second condenser 124, in other words, the gas of the second condenser 124 enters
Mouth is provided with condensate liquid spray assemblies, and condensate liquid cools down to the gas phase for entering the second condenser 124 in the form of being atomized, after atomization
Condensate liquid directly mixed with gas phase.It is directly cooling to the gas of the second falling film evaporator 121.
Low temperature cold condensate is delivered to 124 inlet pipeline of the second condenser by condensate pump, and by atomizer to gas
Phase pipeline sprays, and can directly reduce the gas inlet temperature of the second condenser 124, protection condenser is under acid working condition
Relatively low corrosion rate extends the service life of equipment.In addition, the indirect steam that Phosphoric Acid Concentration evaporation generates is entering the second condensation
Cooling down before device 124, while having the effect of washing, purifying to impurity such as the fluosilicic acid of indirect steam entrainment.
In the present embodiment, second circulation pump 123 is PFA alloy pumps.In other embodiments of the invention, second circulation
Pump 123 or other pumps.
Big flow circulating and evaporating is forced using PFA alloy pumps, vaporization rate when reducing Phosphoric Acid Concentration evaporation, it is possible to reduce dilute phosphorus
Acid is in concentration process because in vaporization entrainment to gas phase.
In the present embodiment, the outlet of second circulation pump 123 is connected with phosphoric acid outlet conduit.
Phosphoric acid 65% can be concentrated into 100% by two level falling film evaporation workshop section 120.It should be noted that in other implementations
In example, final concentration can be selected according to the demand of final phosphoric acid concentration.
In the present embodiment, the first knockout drum 112, the second knockout drum 122 use steel lining polytetrafluoroethylene (PTFE) material
Matter can also use Hastelloy material in other embodiments.
In an embodiment of the present invention, the distributor and tube sheet of the first falling film evaporator 111, the second falling film evaporator 121
Polytetrafluoroethylene (PTFE) making, which may be used, can also use Hastelloy.
In the present embodiment, those skilled in the art can be according to the settings such as topography, temperature pump, valve, looped pipeline, detection
Common element in the techniques such as point, liquid level gauge, thermometer, flowmeter, the present embodiment will be no longer to needing in Phosphoric Acid Concentration system 100
The primary elements such as control valve, shut-off valve, the control point wanted are repeated.
Fig. 4 shows the structural schematic diagram of vacuum subassembly 125 provided in an embodiment of the present invention, please refers to Fig. 4.
From the above, vacuum subassembly 125 is connect with the gas vent of the second condenser 124.On-condensible gas enters vacuum group
Part 125 makes the second condenser 124 have the function of vacuum buffer.
In the present embodiment, vacuum subassembly 125 includes the vacuum pump being connected with each other, heat exchanger.
The major advantage of Phosphoric Acid Concentration system 100 provided in an embodiment of the present invention is：
100 good operational environment of Phosphoric Acid Concentration system, especially evaporate after the gas phase condensed device condensation of generation almost without
Three waste discharge, environmental emission reduction.It is concentrated by stage falling-film evaporation section 110, vacuumizing coordinates two level falling film evaporation workshop section 120
Cooperation, forced circulation falling film evaporation can be by Phosphoric Acid Concentration to 100%.
The present invention also provides a kind of technical solutions：
A kind of Phosphoric Acid Concentration technique includes mainly：
Phosphoric acid,diluted is detached by the first knockout drum 112, and liquid phase is delivered to the first falling liquid film by first circulation pump 113 and steams
It sends out device 111 to evaporate, liquid phase turns again to the separation of the first knockout drum 112, is recycled；
After recycling a period of time, the liquid phase of the first knockout drum 112 enters the second gas-liquid point by first circulation pump 113
It is detached from tank 122, liquid phase is delivered to the second falling film evaporator 121 by second circulation pump 123 and evaporates, and liquid phase turns again to second
Knockout drum 122 detaches, and the second knockout drum 122 is connected with vacuum subassembly 125, carries out being evaporated in vacuo cycle concentration.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of Phosphoric Acid Concentration system, which is characterized in that the Phosphoric Acid Concentration system includes：
Stage falling-film evaporation section, the stage falling-film evaporation section include the first falling film evaporator, the first knockout drum, the
One circulating pump, first knockout drum are pumped by the first circulation and are connect with first falling film evaporator, and described the
The outlet of one falling film evaporator is connected to first knockout drum；
Two level falling film evaporation workshop section, two level falling film evaporation workshop section include the second falling film evaporator, the second knockout drum, the
Two circulating pumps, vacuum subassembly, second knockout drum are connected by second circulation pump with second falling film evaporator
It connects, the outlet of second falling film evaporator is connected to second knockout drum；The vacuum subassembly and second gas
Liquid knockout drum connects；
The first circulation pump is connect by pipeline with second knockout drum.
2. Phosphoric Acid Concentration system according to claim 1, which is characterized in that the stage falling-film evaporation section further includes
One condenser, first condenser are connect with the gas vent of first falling film evaporator.
3. Phosphoric Acid Concentration system according to claim 2, which is characterized in that set at the gas access of first condenser
Spray assemblies are equipped with, the spray assemblies are connect with condensate pump.
4. Phosphoric Acid Concentration system according to claim 1, which is characterized in that two level falling film evaporation workshop section further includes
Two condensers, second condenser are connect with second knockout drum.
5. Phosphoric Acid Concentration system according to claim 4, which is characterized in that set at the gas access of second condenser
Spray assemblies are equipped with, the spray assemblies are connect with condensate pump.
6. Phosphoric Acid Concentration system according to claim 4, which is characterized in that the vacuum subassembly and second condenser
Gas vent connection.
7. Phosphoric Acid Concentration system according to claim 1, which is characterized in that first falling film evaporator, described second
The heat exchanger tube of falling film evaporator is silicon carbide layer heat exchanger tube.
8. Phosphoric Acid Concentration system according to claim 1, which is characterized in that the outlet of the second circulation pump is connected with phosphorus
Sour outlet conduit.
9. Phosphoric Acid Concentration system according to claim 1, which is characterized in that the first circulation pump, the second circulation
Pump is PFA alloy pumps.
10. a kind of Phosphoric Acid Concentration technique, which is characterized in that include mainly：
Phosphoric acid,diluted is detached by the first knockout drum, and liquid phase is delivered to the first falling film evaporator by first circulation pump and evaporates,
Liquid phase turns again to the first knockout drum separation, is recycled；
After recycling a period of time, the liquid phase of first knockout drum enters the second gas-liquid separation by first circulation pump
Tank detaches, and liquid phase is delivered to the second falling film evaporator by second circulation pump and evaporates, and liquid phase turns again to second gas-liquid point
It is detached from tank, second knockout drum is connected with vacuum subassembly, carries out being evaporated in vacuo cycle concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810761762.1A CN108671571A (en) | 2018-07-12 | 2018-07-12 | Phosphoric Acid Concentration system and technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810761762.1A CN108671571A (en) | 2018-07-12 | 2018-07-12 | Phosphoric Acid Concentration system and technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108671571A true CN108671571A (en) | 2018-10-19 |
Family
ID=63813684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810761762.1A Pending CN108671571A (en) | 2018-07-12 | 2018-07-12 | Phosphoric Acid Concentration system and technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108671571A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110562943A (en) * | 2019-09-05 | 2019-12-13 | 云南云天化以化磷业研究技术有限公司 | Method for continuously preparing superphosphoric acid |
| CN113233434A (en) * | 2021-07-13 | 2021-08-10 | 联仕(昆山)化学材料有限公司 | Production process and production device of electronic-grade nitric acid |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0250382A2 (en) * | 1986-06-19 | 1987-12-23 | Sandvik Aktiebolag | Metallic heat exchanger used in the forced-circulation process for the evaporation of phosphoric acid |
| CN1201401A (en) * | 1996-07-10 | 1998-12-09 | 雷声工程师及建造者公司 | Method of recovering fluorine compounds from vapors exiting wet process phosphoric acid evaporators |
| CN205084431U (en) * | 2015-11-04 | 2016-03-16 | 山东三星机械制造有限公司 | Multiple -effect falling film evaporation ware |
| CN106829899A (en) * | 2017-01-10 | 2017-06-13 | 四川大学 | Wet Processes of Phosphoric Acid and fluosilicic acid processing method without fluorinated tail gas discharge |
| CN106882777A (en) * | 2017-04-06 | 2017-06-23 | 南通三圣石墨设备科技股份有限公司 | A kind of purifying phosphoric acid concentration technology |
| CN107161965A (en) * | 2017-04-21 | 2017-09-15 | 宜昌东圣磷复肥有限责任公司 | A kind of wet-process phosphoric acid concentration waste gas recovering device and its technique |
| CN107670315A (en) * | 2017-09-30 | 2018-02-09 | 无锡英罗唯森科技有限公司 | Sulphuric acid concentration system and technique |
-
2018
- 2018-07-12 CN CN201810761762.1A patent/CN108671571A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0250382A2 (en) * | 1986-06-19 | 1987-12-23 | Sandvik Aktiebolag | Metallic heat exchanger used in the forced-circulation process for the evaporation of phosphoric acid |
| CN1201401A (en) * | 1996-07-10 | 1998-12-09 | 雷声工程师及建造者公司 | Method of recovering fluorine compounds from vapors exiting wet process phosphoric acid evaporators |
| CN205084431U (en) * | 2015-11-04 | 2016-03-16 | 山东三星机械制造有限公司 | Multiple -effect falling film evaporation ware |
| CN106829899A (en) * | 2017-01-10 | 2017-06-13 | 四川大学 | Wet Processes of Phosphoric Acid and fluosilicic acid processing method without fluorinated tail gas discharge |
| CN106882777A (en) * | 2017-04-06 | 2017-06-23 | 南通三圣石墨设备科技股份有限公司 | A kind of purifying phosphoric acid concentration technology |
| CN107161965A (en) * | 2017-04-21 | 2017-09-15 | 宜昌东圣磷复肥有限责任公司 | A kind of wet-process phosphoric acid concentration waste gas recovering device and its technique |
| CN107670315A (en) * | 2017-09-30 | 2018-02-09 | 无锡英罗唯森科技有限公司 | Sulphuric acid concentration system and technique |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110562943A (en) * | 2019-09-05 | 2019-12-13 | 云南云天化以化磷业研究技术有限公司 | Method for continuously preparing superphosphoric acid |
| CN113233434A (en) * | 2021-07-13 | 2021-08-10 | 联仕(昆山)化学材料有限公司 | Production process and production device of electronic-grade nitric acid |
| CN113233434B (en) * | 2021-07-13 | 2021-10-22 | 联仕(昆山)化学材料有限公司 | Production process and production device of electronic-grade nitric acid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205699515U (en) | A kind of dilute sulfuric acid waste liquid 3+1 negative pressure evaporation enrichment facility | |
| CN205699506U (en) | A kind of electronics acid pickle electron-level phosphoric acid recycling and processing device | |
| US11192802B2 (en) | Desalinization device and method of using the same | |
| CN107789851B (en) | Triple-effect vacuum evaporation system for improving evaporation efficiency of electrolyte stock solution | |
| CN104027993B (en) | A kind of function of mechanical steam recompression vapo(u)rization system and power-economizing method | |
| CN103613155A (en) | Heat pipe type low temperature two-effect sea water desalting device | |
| CN205730408U (en) | A kind of dilute sulfuric acid waste liquid enrichment facility containing peroxide and hydrogen peroxide | |
| CN205730415U (en) | A kind of recycling and processing device of photoelectric material pickle liquor | |
| CN108671571A (en) | Phosphoric Acid Concentration system and technique | |
| CN105536277A (en) | Evaporation and concentration technology and device for cellosolve NMMO (N-methylmorpholine-N-oxide) aqueous solution | |
| JP2013523439A (en) | Vapor absorption system | |
| CN204138355U (en) | Flow-reversing dual-purpose ammonia concentrating unit | |
| CN207575810U (en) | Sulphuric acid concentration system | |
| CN208465212U (en) | Phosphoric Acid Concentration system and phosphoric acid production system | |
| CN106587238A (en) | Sea water desalination system and method with low temperature exhaust heat utilization function | |
| CN204675941U (en) | A kind of equipment of microwave purifying process heavy metal ion-containing waste water | |
| CN108516603A (en) | A kind of saliferous process for treating acidic sewage and system | |
| CN106621424A (en) | Wastewater treater | |
| CN103185362A (en) | Low-position straight heating machine | |
| CN205973788U (en) | Regard as heat source to be used for device of hydrogen peroxide solution concentration production with steam heat pump | |
| CN104368167A (en) | Triple-effect titanium liquid concentration device and concentration process | |
| CN205391766U (en) | Evaporative concentration device of cellulose solvent NMMO aqueous solution | |
| CN105347413B (en) | A kind of board-like hydrophobic polymer economic benefits and social benefits MVR systems and Waste water concentrating method | |
| CN212214644U (en) | Solvent recovery device | |
| CN210993050U (en) | Evaporative cooling integrated equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181019 |