CN108992951A - A kind of phosphoric acid vacuum concentrating apparatus - Google Patents
A kind of phosphoric acid vacuum concentrating apparatus Download PDFInfo
- Publication number
- CN108992951A CN108992951A CN201811090129.0A CN201811090129A CN108992951A CN 108992951 A CN108992951 A CN 108992951A CN 201811090129 A CN201811090129 A CN 201811090129A CN 108992951 A CN108992951 A CN 108992951A
- Authority
- CN
- China
- Prior art keywords
- phosphoric acid
- section
- evaporation
- concentrated
- tower reactor
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
Abstract
The invention discloses a kind of phosphoric acid vacuum concentrating apparatus, it includes evaporation tower reactor and phosphoric acid reboiler, evaporation tower reactor includes mist segregation section (1), phosphoric acid evaporation and concentration section (2) and phosphoric acid fillter section (3), mist segregation section (1), phosphoric acid are concentrated by evaporation section (2) and phosphoric acid fillter section (3) is from top to bottom set gradually, phosphoric acid reboiler one end is connected to phosphoric acid fillter section (3), and the phosphoric acid reboiler other end is concentrated by evaporation section (2) with phosphoric acid and is connected to.The object of the present invention is to provide a kind of phosphoric acid vacuum concentrating apparatus.Mechanical performance of the present invention is high, and vacuum-resistant degree and corrosion resistance and good, service life of equipment is longer, improves Phosphoric Acid Concentration effect, is able to satisfy the requirement of high temperature and pressure high vacuum condition continuous operation.
Description
Technical field
The present invention relates to Phosphoric Acid Concentration equipment, especially a kind of phosphoric acid vacuum concentrating apparatus.
Background technique
For high concentration phosphoric acid≤61.5%(in terms of P2O5) corrosivity is strong, and fluorine-containing, phosphate radical in acid, and this is more exacerbated
Corrosivity.When Lin Suan Nong Du≤61.5, the metal ion (mainly calcium ion) in phosphoric acid is largely precipitated from acid, in acid solution
Middle formation solid suspension generates abrasive action to concentrator.Common Phosphoric Acid Concentration kettle material steel-lined rubber works in height
Temperature, condition of high vacuum degree, high concentration phosphorus acid corrosion working condition under, it is difficult to meet wanting for modern industry requirement continuous operation
It asks.
Current country's wet-process phosphoric acid concentration technology be mostly use single-stage or multi-stage vacuum concentration technology 24% ~ 28%(with
P2O5 meter) the phosphoric acid method that uses indirect heating be concentrated into 50% ~ 54%(in terms of P2O5) technical grade concentrated phosphoric acid, further use
It is manufactured in processing, such as prepares phosphate fertilizer.
Nowadays, in some food industry, fine chemistry industry to Nong Lin Suan≤61.5%(in terms of P2O5) demand it is increasing,
But the highly concentrated phosphoric acid of the concentration of Phosphoric Acid Concentration Zhi≤61.5% be considered as it is relatively difficult, when this is mainly Lin Suan Nong Du≤61.5,
Metal ion in phosphoric acid is largely precipitated from acid, while the viscosity of acid increases, and general enrichment facility is difficult to continuously
Industrialize steady production.
What another influenced highly concentrated phosphoric acid concentration operation is that highly concentrated phosphoric acid boiling point is high, and enrichment facility operating temperature is high, to dense
The corrosion resistance of contracting tower, mechanical performance propose higher performance requirement.
Therefore, at present during Phosphoric Acid Concentration there are highly concentrated phosphoric acid processing request is higher, it is dense that phosphoric acid is difficult to continuous-stable
The problem of contracting, for existing enrichment facility in concentration, precipitate concentrator easy to wear in phosphoric acid, service life of equipment is shorter,
And the equipment intensity of existing enrichment facility is lower, under high temperature and pressure high vacuum condition, it is difficult to meet continuous operation
It is required that.
Summary of the invention
The object of the present invention is to provide a kind of phosphoric acid vacuum concentrating apparatus.Mechanical performance of the present invention is high, vacuum-resistant degree and
Corrosion resistance and good, service life of equipment is longer, improves Phosphoric Acid Concentration effect, and it is continuous to be able to satisfy high temperature and pressure high vacuum condition
Change the requirement of operation.
Technical solution of the present invention: a kind of phosphoric acid vacuum concentrating apparatus, including evaporation tower reactor and phosphoric acid reboiler, evaporating column
Kettle includes mist segregation section, phosphoric acid evaporation and concentration section and phosphoric acid fillter section, and mist segregation section, phosphoric acid are concentrated by evaporation section and phosphoric acid mistake
Filter section is from top to bottom set gradually, and phosphoric acid reboiler one end is connected to phosphoric acid fillter section, and the phosphoric acid reboiler other end and phosphoric acid steam
Send out enriching section connection.
In a kind of phosphoric acid vacuum concentrating apparatus above-mentioned, the mist segregation section includes being located at evaporation tower reactor kettle wall upper end
Evaporation steam outlet, be equipped with mesh mist eliminator below evaporation steam outlet, wash spray be equipped with below mesh mist eliminator
Pipe.
In a kind of phosphoric acid vacuum concentrating apparatus above-mentioned, set on the evaporation tower reactor kettle wall there are two pressure gauge, pressure gauge
It is connect by pressure gauge port with evaporation tower reactor kettle wall, the pressure gauge port is separately positioned on mesh mist eliminator upper and lower ends.
In a kind of phosphoric acid vacuum concentrating apparatus above-mentioned, the wash spray pipe includes spray head, water-supply-pipe and connection nozzle,
The nozzle is located on evaporation tower reactor kettle wall, and spray head is connected by water-supply-pipe with nozzle is connect.
In a kind of phosphoric acid vacuum concentrating apparatus above-mentioned, the mesh mist eliminator is made of PVDF material.
In a kind of phosphoric acid vacuum concentrating apparatus above-mentioned, it includes being located at evaporation tower reactor kettle wall one that the phosphoric acid, which is concentrated by evaporation section,
The circulation concentrated phosphoric acid import of side, the evaporation tower reactor kettle wall other side are exported equipped with finished product phosphoric acid, and setting height in finished product phosphoric acid outlet is high
In circulation concentrated phosphoric acid import；The phosphoric acid reboiler is concentrated by evaporation section with phosphoric acid by circulation concentrated phosphoric acid import and is connected to.
In a kind of phosphoric acid vacuum concentrating apparatus above-mentioned, the phosphoric acid fillter section includes the taper for being located at evaporating column bottom portion
Bottom, conical bottom middle position are equipped with the outlet of circulation concentrated phosphoric acid, and circulation concentrated phosphoric acid outlet top is equipped with filter device, phosphoric acid reboiler
It is connected to by the outlet of circulation concentrated phosphoric acid with phosphoric acid fillter section；The filter device is the porous plate side of being spliced into of graphite material manufacture
Shape or round filter basket.
In a kind of phosphoric acid vacuum concentrating apparatus above-mentioned, steel tower base is equipped with below the evaporation tower reactor.
In a kind of phosphoric acid vacuum concentrating apparatus above-mentioned, the evaporation tower reactor tower body integrally uses highly corrosion resistant, high rigidity
The manufacture of impermeable graphite material.
In a kind of phosphoric acid vacuum concentrating apparatus above-mentioned, the phosphoric acid reboiler by conduit respectively with phosphoric acid fillter section and
Phosphoric acid is concentrated by evaporation section connection, and phosphoric acid reboiler and phosphoric acid fillter section junction are equipped with forced circulation pump.
Compared with prior art, evaporation tower reactor of the invention is broadly divided into three functional areas, is from bottom to top phosphoric acid respectively
Fillter section, phosphoric acid are concentrated by evaporation section and mist segregation section；Can be continuously 70% ~ 75%(50 ~ 54% of high concentration in terms of P2O5) it is dense
Phosphoric acid continuous concentration Zhi≤85%(61.5% is in terms of P2O5)；Due to the deep-etching characteristic of high temperature concentrated phosphoric acid (fluorine-containing), tower body is whole
It is manufactured using highly corrosion resistant, high rigidity impermeable graphite material, it is resistance to true compared with conventional steel-lined rubber or steel lining PTFE material
Empty performance and corrosion resistance are more preferable, solve reliability, and take into account economy；Utilize the phosphoric acid of concentrated phosphoric acid at various pressures
The different physical property design of boiling point, such as the boiling point of 85% phosphoric acid is 158 DEG C under normal pressure；When pressure reduction to 15KPaA
When, the boiling point of 85% phosphoric acid is reduced to 92 DEG C, thus part water can be evaporated by heating under reduced pressure concentrated phosphoric acid, from
And concentrated phosphoric acid is concentrated.
The tower is broadly divided into three functional areas, is from bottom to top phosphoric acid fillter section, phosphoric acid evaporation and concentration section and mist respectively
Segregation section；Due to the deep-etching characteristic of high temperature concentrated phosphoric acid (fluorine-containing), tower body and the distribution of tower internals material use different impermeability
Graphite material and the manufacture of PVDF material, solve reliability, and take into account economy；The high concentration (70% phosphoric acid) for needing to be concentrated
Entered in tower after phosphoric acid metering by circulating-heating phosphoric acid inlet tube, it is relatively low under the conditions of certain vacuum degree (- 0.09MPa)
The water vapour part of boiling point is stripped out phosphoric acid solution, with mixed vapour rise mist segregation section, big drop gravity settling separation,
Middle droplet (being greater than 5 microns) is condensed into big drop separation after being intercepted by PVDF silk screen；Finally meet the water vapour of process goal
Tower is evaporated by steam outlet with a small amount of phosphoric acid mist.To be concentrated into process goal concentration (≤85% in tower reactor) concentrate
Phosphoric acid, which largely isolates the precipitation solids of bulk by filter device, and filter device is graphite material manufacture
Porous plate splices squarely or round filter basket, its advantage is that corrosion resistance and good, structural strength is high, does not need to replace, reliability
It is high；Concentrated phosphoric acid provides power continuous circulating-heating between evaporation tower reactor and phosphoric acid reboiler by forced circulation pump, continuous to guarantee
Phosphoric acid to be concentrated in metered tower keeps the temperature of boiling；Extra 85% concentrated phosphoric acid flows out phosphoric acid by overflow in tower reactor
Tower reactor is concentrated.By the way that wash spray pipe is arranged, it can be used for washing mesh mist eliminator, prevent from blocking.
In conclusion the object of the present invention is to provide a kind of phosphoric acid vacuum concentrating apparatus.Mechanical performance of the present invention is high,
Vacuum-resistant degree and corrosion resistance and good, service life of equipment is longer, improves Phosphoric Acid Concentration effect, is able to satisfy high temperature and pressure Gao Zhen
The requirement of empty condition continuous operation.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of mist segregation section；
Fig. 3 is the structural schematic diagram that phosphoric acid is concentrated by evaporation section；
Fig. 4 is the structural schematic diagram of sour fillter section；
Fig. 5 is the structural schematic diagram of wash spray pipe.
The label in accompanying drawing is: 1- mist segregation section, 2- phosphoric acid is concentrated by evaporation section, 3- phosphoric acid fillter section, and 4- evaporates water and steams
Gas outlet, 5- mesh mist eliminator, 6- wash spray pipe, 7- pressure gauge port, 8- spray head, 9- water-supply-pipe, 10- connection nozzle, 11- are followed
Ring concentrated phosphoric acid import, the outlet of 12- finished product phosphoric acid, 13- conical bottom, 14- recycle concentrated phosphoric acid outlet, 15- filter device, 16- steel
Tower base.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples, but be not intended as to the present invention limit according to
According to.
Embodiment.A kind of phosphoric acid vacuum concentrating apparatus, as shown in Figures 1 to 5, including evaporation tower reactor and phosphoric acid reboiler,
Evaporation tower reactor includes mist segregation section 1, phosphoric acid evaporation and concentration section 2 and phosphoric acid fillter section 3, and mist segregation section 1, phosphoric acid are concentrated by evaporation
Section 2 and phosphoric acid fillter section 3 are from top to bottom set gradually, and phosphoric acid reboiler one end is connected to phosphoric acid fillter section 3, and phosphoric acid reboiler is another
One end is concentrated by evaporation section 2 with phosphoric acid and is connected to.
The mist segregation section 1 includes the evaporation steam outlet 4 for being located at evaporation tower reactor kettle wall upper end, evaporates vapor
4 lower section of outlet is equipped with mesh mist eliminator 5, is equipped with wash spray pipe 6 below mesh mist eliminator 5；It is set on the evaporation tower reactor kettle wall
There are two pressure gauge, pressure gauge is connect by pressure gauge port 7 with evaporation tower reactor kettle wall, and the pressure gauge port 7 is separately positioned on silk
5 upper and lower ends of net demister；The wash spray pipe 6 includes spray head 8, and water-supply-pipe 9 and connection nozzle 10, the nozzle are located at steaming
It sends out on tower reactor kettle wall, spray head 8 is connected by water-supply-pipe 9 with nozzle 10 is connect；The mesh mist eliminator 5 is by PVDF material system
At；It includes being located at the circulation concentrated phosphoric acid import 11 of evaporation tower reactor kettle wall side that the phosphoric acid, which is concentrated by evaporation section 2, evaporates tower reactor kettle wall
The other side is equipped with finished product phosphoric acid outlet 12, and 12 setting height of finished product phosphoric acid outlet is higher than circulation concentrated phosphoric acid import 11；The phosphoric acid
Reboiler is concentrated by evaporation section 2 with phosphoric acid by circulation concentrated phosphoric acid import 11 and is connected to；The phosphoric acid fillter section 3 includes being located at evaporating column
The conical bottom 13 in bottom portion, 13 middle position of conical bottom are equipped with circulation concentrated phosphoric acid outlet 14, and 14 top of circulation concentrated phosphoric acid outlet is set
There is filter device 15, phosphoric acid reboiler is connected to by circulation concentrated phosphoric acid outlet 14 with phosphoric acid fillter section 3；The filter device 15 is
Steel tower base 16 is equipped with below evaporation tower reactor described in the porous plate splicing squarely of graphite material manufacture or round filter basket；It is described
Evaporation tower reactor tower body integrally uses highly corrosion resistant, the manufacture of high rigidity impermeable graphite material；The phosphoric acid reboiler passes through conduit
It is concentrated by evaporation section 2 with phosphoric acid fillter section 3 and phosphoric acid respectively to be connected to, phosphoric acid reboiler and 3 junction of phosphoric acid fillter section are equipped with and force
Circulating pump.
Working principle: entered after the phosphoric acid metering for the high concentration (70%) for needing to be concentrated by circulating-heating phosphoric acid inlet tube
In tower, under the conditions of certain vacuum degree, relatively low-boiling water vapour part is stripped out phosphoric acid solution, rises with mixed vapour
Mist segregation section 1, big drop gravity settling separation, middle droplet (being greater than 5 microns) are condensed into big liquid after being intercepted by PVDF silk screen
Drop separation；The water vapour and a small amount of phosphoric acid mist for finally meeting process goal by steam outlet evaporate tower.It is in tower reactor
Be concentrated into process goal concentration (≤85%) concentrate phosphoric acid, which largely isolates the precipitation of bulk by filter device 15
Solids provides power continuous circulating-heating between evaporation tower reactor and phosphoric acid reboiler by forced circulation pump, to guarantee in terms of continuously
The phosphoric acid to be concentrated that amount is added in tower keeps the temperature of boiling.Extra 85% concentrated phosphoric acid is filled by liquid automatic control in tower reactor
It sets automatic overflow and goes out Phosphoric Acid Concentration tower reactor.
Claims (10)
1. a kind of phosphoric acid vacuum concentrating apparatus, it is characterised in that: including evaporation tower reactor and phosphoric acid reboiler, evaporation tower reactor includes mist
Foam segregation section (1), phosphoric acid are concentrated by evaporation section (2) and phosphoric acid fillter section (3), and mist segregation section (1), phosphoric acid are concentrated by evaporation section (2)
It is from top to bottom set gradually with phosphoric acid fillter section (3), phosphoric acid reboiler one end is connected to phosphoric acid fillter section (3), phosphoric acid reboiler
The other end is concentrated by evaporation section (2) with phosphoric acid and is connected to.
2. a kind of phosphoric acid vacuum concentrating apparatus according to claim 1, it is characterised in that: mist segregation section (1) packet
The evaporation steam outlet (4) for being located at evaporation tower reactor kettle wall upper end is included, is equipped with silk screen demisting below evaporation steam outlet (4)
Device (5), mesh mist eliminator (5) lower section are equipped with wash spray pipe (6).
3. a kind of phosphoric acid vacuum concentrating apparatus according to claim 2, it is characterised in that: set on the evaporation tower reactor kettle wall
There are two pressure gauge, pressure gauge is connect by pressure gauge port (7) with evaporation tower reactor kettle wall, and the pressure gauge port (7) is respectively set
In mesh mist eliminator (5) upper and lower ends.
4. a kind of phosphoric acid vacuum concentrating apparatus according to claim 2, it is characterised in that: wash spray pipe (6) packet
It includes spray head (8), water-supply-pipe (9) and connection nozzle (10), the nozzle are located on evaporation tower reactor kettle wall, and spray head (8) passes through water delivery
Pipe (9) is connected with nozzle (10) are connect.
5. a kind of phosphoric acid vacuum concentrating apparatus according to claim 2, it is characterised in that: the mesh mist eliminator (5) is
It is made of PVDF material.
6. a kind of phosphoric acid vacuum concentrating apparatus according to claim 1, it is characterised in that: the phosphoric acid is concentrated by evaporation section
It (2) include the circulation concentrated phosphoric acid import (11) for being located at evaporation tower reactor kettle wall side, the evaporation tower reactor kettle wall other side is equipped with finished product phosphorus
Acid outlet (12), finished product phosphoric acid export (12) setting height and are higher than circulation concentrated phosphoric acid import (11)；The phosphoric acid reboiler passes through
Circulation concentrated phosphoric acid import (11) is concentrated by evaporation section (2) with phosphoric acid and is connected to.
7. a kind of phosphoric acid vacuum concentrating apparatus according to claim 1, it is characterised in that: phosphoric acid fillter section (3) packet
The conical bottom (13) for being located at evaporating column bottom portion is included, conical bottom (13) middle position is equipped with circulation concentrated phosphoric acid outlet (14), circulation
Concentrated phosphoric acid exports and is equipped with filter device (15) above (14), and phosphoric acid reboiler is filtered by circulation concentrated phosphoric acid outlet (14) and phosphoric acid
Section (3) connection；The filter device (15) is that the porous plate of graphite material manufacture splices squarely or round filter basket.
8. a kind of phosphoric acid vacuum concentrating apparatus according to claim 1, it is characterised in that: be equipped with below the evaporation tower reactor
Steel tower base (16).
9. a kind of phosphoric acid vacuum concentrating apparatus according to claim 1, it is characterised in that: the evaporation tower reactor tower body is whole
It is manufactured using highly corrosion resistant, high rigidity impermeable graphite material.
10. a kind of phosphoric acid vacuum concentrating apparatus according to claim 1, it is characterised in that: the phosphoric acid reboiler passes through
Conduit is concentrated by evaporation section (2) with phosphoric acid fillter section (3) and phosphoric acid respectively and is connected to, and phosphoric acid reboiler is connect with phosphoric acid fillter section (3)
Place is equipped with forced circulation pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811090129.0A CN108992951A (en) | 2018-09-18 | 2018-09-18 | A kind of phosphoric acid vacuum concentrating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811090129.0A CN108992951A (en) | 2018-09-18 | 2018-09-18 | A kind of phosphoric acid vacuum concentrating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108992951A true CN108992951A (en) | 2018-12-14 |
Family
ID=64592286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811090129.0A Pending CN108992951A (en) | 2018-09-18 | 2018-09-18 | A kind of phosphoric acid vacuum concentrating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108992951A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1502038A1 (en) * | 1986-11-17 | 1989-08-23 | Воскресенский филиал Научно-исследовательского института по удобрениям и инсектофунгицидам им.проф.Я.В.Самойлова Научно-производственного объединения "Минудобрения" | Plant for concentrating phosphoric acid |
| CN102424373A (en) * | 2011-12-16 | 2012-04-25 | 吴杰 | Concentration apparatus for wet method phosphoric acid refinement |
| CN103100282A (en) * | 2013-02-16 | 2013-05-15 | 西安超滤化工有限责任公司 | Ammonium nitrate technology steam demisting apparatus |
| CN203678059U (en) * | 2013-08-30 | 2014-07-02 | 甘肃瓮福化工有限责任公司 | Circulating filter |
-
2018
- 2018-09-18 CN CN201811090129.0A patent/CN108992951A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1502038A1 (en) * | 1986-11-17 | 1989-08-23 | Воскресенский филиал Научно-исследовательского института по удобрениям и инсектофунгицидам им.проф.Я.В.Самойлова Научно-производственного объединения "Минудобрения" | Plant for concentrating phosphoric acid |
| CN102424373A (en) * | 2011-12-16 | 2012-04-25 | 吴杰 | Concentration apparatus for wet method phosphoric acid refinement |
| CN103100282A (en) * | 2013-02-16 | 2013-05-15 | 西安超滤化工有限责任公司 | Ammonium nitrate technology steam demisting apparatus |
| CN203678059U (en) * | 2013-08-30 | 2014-07-02 | 甘肃瓮福化工有限责任公司 | Circulating filter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104667579B (en) | Method and device for strengthening oil-water separation and coupled desalting functions in cold low pressure separator | |
| CN109943359A (en) | A kind of electric field-enhanced fibre module unit and its application | |
| CN209033770U (en) | A kind of phosphoric acid vacuum concentrating apparatus | |
| CN108992951A (en) | A kind of phosphoric acid vacuum concentrating apparatus | |
| CN112915569A (en) | Bubble column for acid defluorination of phosphoric acid residue by wet method and defluorination method thereof | |
| CN206730537U (en) | A kind of three-effect evaporation and condensation device | |
| CN214763403U (en) | Bubble-cap tower for acid defluorination of phosphoric acid residues by wet method | |
| CN211665028U (en) | Oil-water separation device for extracting essential oil | |
| CN208493276U (en) | A kind of condensing plant and liquor production system | |
| CN205127435U (en) | TBA feeding fractionating tower | |
| CN208586062U (en) | A kind of phosphorus thiochloride extraction system | |
| CN206214819U (en) | A kind of rectifying cut circulating treating system | |
| CN203700278U (en) | Vacuum flash evaporator | |
| CN215427351U (en) | Secondary defoaming device of forced circulation evaporation crystallization system | |
| CN219239596U (en) | Volatile oil extraction element | |
| CN220633685U (en) | Hexafluoropropylene removes methyl alcohol equipment | |
| CN205252556U (en) | Vacuum concentrating apparatus | |
| US1192987A (en) | Method and apparatus for obtaining wood-alcohol and calcium acetate from acetate liquor. | |
| CN219209032U (en) | Deoiling tower structure of propane dehydrogenation device | |
| CN209422993U (en) | A kind of mother liquor recovering device producing nano zine oxide | |
| CN207307224U (en) | The decompression distillation system of hexamethyldisiloxane and hexamethyldisilazane | |
| CN216395555U (en) | Wet process phosphoric acid semi-water filtration system | |
| CN212282937U (en) | Drainage device for rectification system | |
| CN208641809U (en) | A kind of rectifying tower reboiler circulatory system | |
| CN209500826U (en) | A kind of flash distillation hoist type rectifier unit |
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 |