CN207913468U - A kind of device for recovering tail gas in fluosilicic acid concentration process - Google Patents
A kind of device for recovering tail gas in fluosilicic acid concentration process Download PDFInfo
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- CN207913468U CN207913468U CN201721880830.3U CN201721880830U CN207913468U CN 207913468 U CN207913468 U CN 207913468U CN 201721880830 U CN201721880830 U CN 201721880830U CN 207913468 U CN207913468 U CN 207913468U
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- absorption tower
- drainage trough
- collecting pit
- active carbon
- carbon filtering
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Abstract
The utility model belongs to technical field of fluorine chemical industry, more particularly to a kind of device for recovering tail gas in fluosilicic acid concentration process, including several concatenated absorption tower, active carbon filtering device and chimneys, the air inlet on the absorption tower of front end connects offgas duct in several concatenated absorption towers, gas outlet is connect with the air inlet on next absorption tower, the air inlet of the gas outlet connection active carbon filtering device on the last one absorption tower, the gas outlet of the active carbon filtering device connects chamber inlet；The liquid outlet that the absorption tower, active carbon filtering device bottom are arranged is connect by pipeline with collecting pit, and the collection device is connect by pipeline and compression pump with the inlet above absorption tower；The offgas duct is 15 45 degree with absorption tower angle a.Device for recovering tail gas in the utility model fluosilicic acid concentration process is realized by concatenated absorption tower, active carbon filter, collector and removes inert compound in tail gas, the purpose of metal impurities such as boron, phosphorus and calcium compound.
Description
Technical field
The utility model belongs to a kind of dress of the tail gas recycle in technical field of fluorine chemical industry more particularly to fluosilicic acid concentration process
It sets.
Background technology
Dilute fluosilicic acid from phosphate fertilizer plant removes objectionable impurities arsenic by dearsenification, subsequently into fluosilicic acid concentration systems, warp
Concentration is crossed, certain density dense fluosilicic acid is obtained, after being separated by filtration, dense fluosilicic acid enters reactor and mixed with the concentrated sulfuric acid.
During concentrating fluosilicic acid, there is a large amount of fluosilicic acid to be decomposed to form ocratation and hydrogen fluoride, the two and water vapour enter together
Gas phase causes damages, and additionally includes inert compound, metal impurities such as a large amount of impurity such as boron, phosphorus and calcium compound, therefore need
Tail gas handle and then recycled, improve the rate of recovery of hydrogen fluoride.
Invention content
To solve the above problems, the utility model provides the device for recovering tail gas in a kind of fluosilicic acid concentration process, it can
Tail gas is effectively treated, it is ensured that qualified discharge, and fluorine-containing product therein can be recycled.
Technical solutions of the utility model：
A kind of device for recovering tail gas in fluosilicic acid concentration process, including several concatenated absorption towers, activated carbon filtering
Device and chimney, the air inlet on the absorption tower of front end connects offgas duct in several concatenated absorption towers, gas outlet with it is next
The air inlet on absorption tower connects, the air inlet of the gas outlet connection active carbon filtering device on the last one absorption tower, the activity
The gas outlet of charcoal filter device connects chamber inlet；The absorption tower, the liquid outlet of active carbon filtering device bottom setting are logical
Piping is connect with collecting pit, and the collection device is connect by pipeline and compression pump with the inlet above absorption tower；It is described
Offgas duct is 15-45 degree with absorption tower angle a.
Preferably, the collection device is equipped with the first drainage trough, several second drainage troughs and multistage collecting pit, and described the
One drainage trough is connect with the second drainage trough, and the collecting pit is connected in series with by the second drainage trough, and the collecting pit draws with second
The angle b of chute is 30-50 degree；
The liquid outlet that the absorption tower, active carbon filtering device bottom are arranged is connect by pipeline with the first drainage trough, institute
The one side closed of the collecting pit far from the first drainage trough is stated, and the collecting pit of separate first drainage trough passes through pipeline and pressure
Pump is connect with the inlet above absorption tower.
It is further preferred that the junction of the collecting pit and the second drainage trough is equipped with strainer, the aperture of the strainer with
The series increase for collecting pit tapers into.
Preferably, it is equipped with escape pipe above the absorption tower, spray is equipped with inside the absorption tower and below escape pipe
The inlet of shower device, the absorption tower connects spray equipment and collection device by pipeline.
Preferably, several concatenated filter layers, the Z-shape distribution of filter layer, institute are equipped with below the spray equipment
It states spray equipment and is at least one layer, each layer is equipped with several spray nozzles, a diameter of 30-60nm of spray nozzle.
The utility model advantageous effect：
1, the device for recovering tail gas in the utility model fluosilicic acid concentration process passes through concatenated absorption tower, activated carbon mistake
Filter, collector, which are realized, removes inert compound in tail gas, the purpose of metal impurities such as boron, phosphorus and calcium compound.
2, collection device, by the first drainage trough of setting, the second drainage trough drainage trough, multistage collecting pit, described first
Drainage trough is connect with the second drainage trough, and the collecting pit is connected in series with by the second drainage trough, the collecting pit and the second drainage
The angle b of slot be 30-50 degree, reduce liquid collecting pit flowing velocity, extend flow distance, by collection liquid grit,
Cigarette ash fully settles, and detaches step by step, and can reduce collecting pit floor space, and strainer blocks the other collecting pit endoparticle of upper level
It cuts, aperture is tapered into the series increase of collecting pit, improves purification efficiency, and the water of afterbody is used directly for inhaling
The spray equipment water in tower is received, prevents equipment from blocking, influences the orderly progress of biochemical reaction in tower.
3, the outlet pipe is connected to drainage trough, and the third collecting pit is connect by pipeline with spray equipment, needs to sink
The water of drop enters drainage trough, and by settling and detaching layer by layer, finally complete desulfurization and the dedusting in third collecting pit, third is received
Collection pond in water may be directly applied to spray equipment device water, further concentration production hydrogen fluoride, reach recycling and
The effect of deep layer concentration.
4, the uniform rapid dispersion of spray liquid can be come by spray system, come into full contact with reacting with exhaust gas, carries
High efficiency.
5, apparatus structure provided by the utility model is simple, easy to operate, at low cost, will not introduce other impurities and pollution
Object.
Description of the drawings
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the utility model absorption tower structural schematic diagram；
Fig. 3 is the utility model collection device structural schematic diagram；
Wherein：Absorption tower A, active carbon filtering device B, chimney C, collection device D, the first drainage trough D-1, the second drainage trough
D-2, collecting pit D-3, strainer D-4, offgas duct 1, escape pipe 2, spray equipment 3, filter layer 4, absorption tower gas outlet 5, absorption tower
Air inlet 6.
Specific implementation mode
Embodiment 1
A kind of device for recovering tail gas in fluosilicic acid concentration process, including the filtering of several concatenated absorption tower A, activated carbon
Device B and chimney C, the air inlet on the absorption tower of front end connects offgas duct 1 in several concatenated absorption towers, and gas outlet is under
The air inlet on one absorption tower connects, the air inlet of the gas outlet connection active carbon filtering device B on the last one absorption tower, the work
Property charcoal filter device B gas outlet connect chimney C air inlets；What the absorption tower A, the bottoms active carbon filtering device B were arranged goes out
Liquid mouth is connect by pipeline with collecting pit D, and the collection device D passes through pipeline and compression pump and the inlet above the A of absorption tower
Connection；The offgas duct 1 and absorption tower A angles a is 15-45 degree.Angle a can allow tail gas approach axis to be directed toward tower bottom, prolong
Residence time of the tail gas in absorption tower is grown.
Preferably, the collection device D is equipped with the first drainage trough D-1, several the second drainage trough D-2 and multistage collecting pit
D-3, the first drainage trough D-1 are connect with the second drainage trough D-2, and the collecting pit D-3 is connected by the second drainage trough D-2 series connection
It connects, the angle b of the collecting pit D-3 and the second drainage trough D-2 are 30-50 degree；Angle b settings can delay the flowing of collection liquid
Speed fully precipitates.
The liquid outlet that the absorption tower A, the bottoms active carbon filtering device B are arranged passes through pipeline and the first drainage trough D-1 connects
It connects, the collecting pit D-3's of the separate first drainage trough D-1 is one side closed, and the collecting pit of the separate first drainage trough D-1
D-3 is connect by pipeline and compression pump with the inlet above the A of absorption tower.
It is further preferred that the junction of the collecting pit D-3 and the second drainage trough D-2 are equipped with strainer D-4, the strainer
The aperture of D-4 is tapered into the series increase of collecting pit D-3.
Preferably, the tops absorption tower A are set equipped with escape pipe 2, the inside absorption tower A and positioned at 2 lower section of escape pipe
There are spray equipment 3, the inlet of the absorption tower A to connect spray equipment 3 and collection device D by pipeline.
Preferably, the lower section of the spray equipment 3 is equipped with several concatenated filter layers 4,4 Z-shape distribution of the filter layer,
The spray equipment 4 is at least one layer, and each layer is equipped with several spray nozzles, a diameter of 30-60nm of spray nozzle.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as the limitation for the present invention, this Shen
Please in embodiment and embodiment in feature in the absence of conflict, mutually can arbitrarily combine.The protection model of the present invention
Enclose the equivalent replacement side of technical characteristic in the technical solution that should be recorded with claim, including the technical solution of claim record
Case is protection domain.Equivalent replacement i.e. within this range is improved, also within protection scope of the present invention.
Claims (5)
1. the device for recovering tail gas in a kind of fluosilicic acid concentration process, it is characterised in that：Including several concatenated absorption towers
（A）, active carbon filtering device（B）And chimney（C）, the air inlet connection on the absorption tower of front end in several concatenated absorption towers
Offgas duct（1）, gas outlet connect with the air inlet on next absorption tower, the gas outlet connection activated carbon filtering on the last one absorption tower
Device（B）Air inlet, the active carbon filtering device（B）Gas outlet connect chimney（C）Air inlet；The absorption tower（A）、
Active carbon filtering device（B）The liquid outlet of bottom setting passes through pipeline and collection device（D）Connection, the collection device（D）It is logical
Piping and compression pump and absorption tower（A）The inlet of top connects；The offgas duct（1）With absorption tower（A）Angle a is 15-
45 degree.
2. the apparatus according to claim 1, it is characterised in that：The collection device（D）Equipped with the first drainage trough（D-1）、
Several second drainage troughs（D-2）With multistage collecting pit（D-3）, first drainage trough（D-1）With the second drainage trough（D-2）Even
It connects, the collecting pit（D-3）Pass through the second drainage trough（D-2）It is connected in series with, the collecting pit（D-3）With the second drainage trough（D-
2）Angle b be 30-50 degree；
The absorption tower（A）, active carbon filtering device（B）The liquid outlet of bottom setting passes through pipeline and the first drainage trough（D-1）
Connection, separate first drainage trough（D-1）Collecting pit（D-3）One side closed, and separate first drainage trough（D-1）
Collecting pit（D-3）Pass through pipeline and compression pump and absorption tower（A）The inlet of top connects.
3. the apparatus of claim 2, it is characterised in that：The collecting pit（D-3）With the second drainage trough（D-2）Company
It meets place and is equipped with strainer（D-4）, the strainer（D-4）Aperture with collecting pit（D-3）Series increase taper into.
4. the apparatus according to claim 1, it is characterised in that：The absorption tower（A）Top is equipped with escape pipe（2）, described
Absorption tower（A）It is internal and be located at escape pipe（2）Lower section is equipped with spray equipment（3）, the absorption tower（A）Inlet pass through pipeline
Connect spray equipment（3）And collection device（D）.
5. device according to claim 4, it is characterised in that：The spray equipment（3）It is concatenated that lower section is equipped with several
Filter layer（4）, the filter layer（4）Z-shape distribution, the spray equipment（3）At least one layer, each layer is sprayed equipped with several
Spray head, a diameter of 30-60nm of spray nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721880830.3U CN207913468U (en) | 2017-12-28 | 2017-12-28 | A kind of device for recovering tail gas in fluosilicic acid concentration process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721880830.3U CN207913468U (en) | 2017-12-28 | 2017-12-28 | A kind of device for recovering tail gas in fluosilicic acid concentration process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207913468U true CN207913468U (en) | 2018-09-28 |
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ID=63615561
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721880830.3U Active CN207913468U (en) | 2017-12-28 | 2017-12-28 | A kind of device for recovering tail gas in fluosilicic acid concentration process |
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| CN (1) | CN207913468U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024040659A1 (en) * | 2022-08-22 | 2024-02-29 | 福建省龙氟新材料有限公司 | Tail gas adsorption tower specially adapted for hydrogen fluoride |
-
2017
- 2017-12-28 CN CN201721880830.3U patent/CN207913468U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024040659A1 (en) * | 2022-08-22 | 2024-02-29 | 福建省龙氟新材料有限公司 | Tail gas adsorption tower specially adapted for hydrogen fluoride |
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