CN106215629A - The washing methods of a kind of phosphoric acid extraction tail gas and device - Google Patents
The washing methods of a kind of phosphoric acid extraction tail gas and device Download PDFInfo
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- CN106215629A CN106215629A CN201610779254.7A CN201610779254A CN106215629A CN 106215629 A CN106215629 A CN 106215629A CN 201610779254 A CN201610779254 A CN 201610779254A CN 106215629 A CN106215629 A CN 106215629A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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Abstract
The present invention relates to phosphoric acid extraction tail gas disposal technique field, the washing methods of a kind of phosphoric acid extraction tail gas and device, by using sluicing pipe to substitute traditional Venturi scrubber, and whole device has been done adaptive adjustment, especially the structure of sluicing pipe is studied, make the gas can be according to the washing principle in Venturi scrubber, straight-through sluicing pipe is washed, ensure that detersive efficiency, make the particulate matter being difficult to form attachment on sluicing pipe inwall, and then avoid washing the phenomenon of tube wall caking blocking；And the shower nozzle combination spray equipment in sluicing pipe carries out the appropriate design of position, make the once washing effect to tail gas preferable, it is to avoid after entering in scrubbing tower a, substantial amounts of crystallization to occur, cause the shower nozzle in scrubbing tower a that the phenomenon of blocking occurs, improve the ability that washing tail gas is purified.
Description
Technical field
The present invention relates to phosphoric acid extraction tail gas disposal technique field, the washing methods of a kind of phosphoric acid extraction tail gas and
Device.
Background technology
At phosphoric acid by wet process extraction process, it is frequently accompanied by substantial amounts of tail gas and produces, and containing substantial amounts of in this tail gas
Fluorine gas and other harmful gas, it is difficult to reach environmental protection index, in order to meet environmental requirement, at phosphoric acid by wet process extraction process
In, after needing the tail gas that extraction is got rid of to carry out carrying out washing treatment, can be discharged in environment.
Traditional exhaust gas treating method and equipment is: use Venturi scrubber to process as the first order of tail gas, then will
Tail gas after process enters in inversely spraying scrubbing tower, carries out multistage carrying out washing treatment so that after it reaches discharge standard, at emptying
Reason；In above-mentioned processing procedure, the source of its washings is mainly slag field backwater, and the recirculated water in scrubbing tower etc. carries out overflow and follows
Washing-round is washed, and after getting rid of finally by the slag-drip opening in each scrubbing tower, is pumped to slag chute.
And in above-mentioned traditional method, the equipment situation that it uses is substantially: Venturi scrubber size: Φ
1000mm/ Φ 560mm × 4210mm, Venturi scrubber configuration two set spray equipment, lay respectively at top and perpendicular tee joint section,
The washing water yield is 130-150m3/h；First scrubbing tower size Φ 2400mm × 16250mm, design temperature 85 DEG C, operate temperature
58.5 DEG C, equipment takes over long 150mm, and first and second scrubbing tower configuration two-layer spray, every layer 6 set hoop is uniform, and endless tube model is
DN150 steel skeleton composite, spray equipment model is: LY20-10-433L:150-820, and shower nozzle model is DN80, washs the water yield
For 300m3/h；First and second cycles of washing pump discharge Q=301m3/ h, lift H=41m, power 75kw, be respectively used to supply one,
Two wash tower two-layer spray；Tail gas the 3rd scrubbing tower size Φ 3400mm × 29900mm (straight section)/Φ 1600mm × 9030mm, joins
Put four layers of DN80 spray；Second scrubbing tower primary cycle pump discharge Q=305m3/ h, lift H=40m, power 75kw, be used for supplying
Two-layer should be descended to spray；Second scrubbing tower secondary cycle pump discharge Q=305m3/ h, lift H=53m, power 110kw, be used for supplying
Upper two-layer sprays.
But, owing to venturi is between the first scrubbing tower and extraction tank, gas temperature is the highest, easily forms crystal
Matter is attached on inner-walls of duct and spray equipment, adds that Venturi throat position diameter is little, in washing process, flows through at a high speed
Can lower the temperature rapidly when high-temperature gas and cleaning mixture are sufficiently mixed, exacerbate the crystallization of silica gel, easily block gas passage, shadow
Ring detersive efficiency.The spray system being additionally, since in scrubbing tower arranges unreasonable so that its solid easily come off on tower wall
Block blocks；In addition, spray system is during spray, and its cleaning mixture is longer at dwell time in the tower so that silica gel
Crystallizing Deng material so that after crystalline material enters spray system, the pipeline of blocking spray system, result in blockage phenomenon.
Summary of the invention
In order to solve above-mentioned technical problem present in prior art, the present invention provides the washing of a kind of phosphoric acid extraction tail gas
Method and apparatus.
It is achieved particular by techniques below scheme:
The wash mill of a kind of phosphoric acid extraction tail gas, including sluicing pipe, scrubbing tower a, scrubbing tower b, scrubbing tower c, filters tail
Trachea, wherein scrubbing tower a is ejected mouth by the tower a being arranged on scrubbing tower a tower body top, is arranged on scrubbing tower a tower body sidewall close
Import at the bottom of the tower a of bottom, is arranged on the tower a slag-drip opening bottom scrubbing tower a tower body, the first spray being arranged in scrubbing tower a tower body
Pouring structure forms；Scrubbing tower b is to be ejected mouth by the tower b being arranged on scrubbing tower b tower body top, is arranged on scrubbing tower b tower body sidewall
Near import at the bottom of the tower b of bottom, it is arranged on the tower b slag-drip opening bottom scrubbing tower b tower body, the be arranged in scrubbing tower b tower body
Two spray structure compositions；Scrubbing tower c, by being arranged on the tower c evacuation port at scrubbing tower c tower body top, is arranged on scrubbing tower c tower body side
Wall, near import at the bottom of the tower c of bottom, is arranged on the tower c slag-drip opening bottom scrubbing tower c tower body, is arranged in scrubbing tower c tower body
3rd spray structure composition；The sidewall of sluicing pipe is provided with extraction gas inlet near top, arranges near bottom at its sidewall
There is gas outlet, be provided with slag-drip opening with gas outlet relative to position, and be internally provided with spray system at sluicing pipe；Wash
Washing inlet communication at the bottom of the tower a of the gas outlet on pipe and scrubbing tower a, the tower a of scrubbing tower a ejects mouth and enters at the bottom of the tower b of scrubbing tower b
Mouthful connection, the tower b of scrubbing tower b ejects inlet communication at the bottom of the tower c of mouth and scrubbing tower c, and import at the bottom of tower b ejects mouth and tower c
Between communicating pipe on be provided with filtration offgas duct.
Described sluicing pipe be internally provided with hang plate, and, the incline direction of hang plate is to slag-drip opening, hang plate
The position contacted with the pipe shaft of sluicing pipe is lower than the position that gas outlet and slag-drip opening are arranged.
Described spray system, it is by being arranged on the jet head sets of sluicing pipe pipe shaft and being arranged on the spray dress at sluicing pipe top
Putting composition, wherein jet head sets is made up of the first shower nozzle, the second shower nozzle, the 3rd shower nozzle.
Described jet head sets, the first shower nozzle therein is positioned at sluicing pipe 2/3rds eminence, and enters less than extraction tail gas
Mouth arranges place；Second shower nozzle is positioned at sluicing pipe 1/2nd eminence；3rd shower nozzle is positioned at sluicing pipe 1/3rd eminence.
A diameter of 2000mm of described sluicing pipe.
The first described spray structure is two-layer, and hoop is uniformly distributed by every layer six, mutually forms staggered 30 ° between two-layer
Angle；The second described spray structure is two-layer, and hoop is uniformly distributed by every layer six, mutually forms staggered 30 ° of angles between two-layer；Institute
The 3rd spray structure stated is four layers, and hoop is uniformly distributed by every layer six, mutually forms staggered 30 ° of angles between adjacent two layers.
Described spray structure, it is by spray thrower, the endless tube connected with spray thrower tail end, the inlet being arranged on endless tube
Composition, wherein spray thrower uses expansion joint to be connected with endless tube.
Described endless tube uses the steel skeleton composite of DN200, utilizes Flange joint so that endless tube is around scrubbing tower
Form octagonal structure.
Described tower b ejects mouth, on communicating pipe between import at the bottom of itself and tower c, is provided with three-way interface, and three connect
Mouth is arranged on the communicating pipe pipe bent position of 90 °, before being positioned at and filtering offgas duct link position；First port of three-way interface and tower
B pushes up outlet；Inlet communication at the bottom of second port and tower c；Third connectivity mouth enters liquid seal trough, and third connectivity mouth be vertical to
Under.
Washing methods is that extraction tank is got rid of the extraction tail gas of coming, through extraction gas inlet entrance sluicing pipe, and simultaneously
Open sluicing pipe top spray device so that the ejecting liquid at extraction tail gas and top moves down after being fully contacted, and by the
One shower nozzle, the second shower nozzle, the 3rd shower nozzle are opened so that it forms level Four spray washing to extraction tail gas；Ejecting liquid is existed
Under the effect of hang plate, to the direction of slag-drip opening, flowing is got rid of, and the gas sprayed is discharged through gas outlet, through at the bottom of tower a
Import enters in scrubbing tower a, from the bottom to top, and is issued to the effect of washing in the effect of the first spray structure, and ejects from tower a
Mouth is discharged；Enter in scrubbing tower b through import at the bottom of tower b, from the bottom to top, and be issued to washing in the effect of the second spray structure
Effect, and eject mouth discharge from tower b；It is directly entered scrubbing tower c through import at the bottom of tower c or gets rid of, with filtering offgas duct, the gas of coming
After body mixing, it is directly entered scrubbing tower c through import at the bottom of tower c, from the bottom to top, and is issued to wash in the effect of the 3rd spray structure
The effect washed, and empty from tower c evacuation port, washing can be completed.
The concrete operations person of the invention import and export at liquid can arrange pump, in the turnover of gas as required
Blower fan is set at Kou, to reach pressurization, improves flow velocity or the flow of gas of liquid, improve clean result.
Compared with prior art, the technique effect of the present invention is embodied in:
By using sluicing pipe to substitute traditional Venturi scrubber, and whole device is done adaptive tune
Whole, especially the structure of sluicing pipe is studied so that gas can according to the washing principle in Venturi scrubber,
Straight-through sluicing pipe is washed, it is ensured that detersive efficiency so that on sluicing pipe inwall, be difficult to be formed the granule of attachment
Thing, and then avoid washing the phenomenon of tube wall caking blocking；And the shower nozzle combination spray equipment in sluicing pipe carries out the conjunction of position
Reason design so that preferable to the once washing effect of tail gas, it is to avoid after entering in scrubbing tower a, substantial amounts of crystallization occurs, causes washing
Wash the shower nozzle in tower a and the phenomenon of blocking occurs, improve the ability that washing tail gas is purified.
The present invention arranges spray equipment by the top at sluicing pipe so that the liquid got off from the top spray of sluicing pipe
Body can be rinsed spray to the jet head sets on sluicing pipe pipe shaft, it is to avoid occurs that crystal blocks in jet head sets, also makes
The tail gas clean-up ability of sluicing pipe strengthens, it is to avoid sluicing pipe tube wall caking causes cleaning difficulty, reduces vent gas treatment
Labor intensity.
In addition, it is to avoid when tail gas enters in scrubbing tower a, scrubbing tower b, scrubbing tower c, wherein remain and be prone to knot in a large number
Brilliant material so that the inventory stop crystallization in scrubbing tower a, scrubbing tower b, scrubbing tower c, precipitating is less, increases device
Processing the ability of tail gas, reduce processing cost, and make the concentration in holding process relatively low, crystallization degree is relatively low, makes
Obtain it to flow along with the pumping flow of liquid, and then avoid clogging.
In addition, the spray structure in scrubbing tower is also improved by this researcher so that liquid is during spray
Stay cycle shorter so that it is more that liquid is in the dynamic time, it is therefore prevented that the cleaning mixture time of staying is longer to cause
Crystallization and precipitation, it is to avoid blocking.
Meanwhile, the structure that some are tiny is also improved by this researcher, expands as used between endless tube and spray thrower
Joint connects so that the impact of the spraying effect of spray system is weakened, even by variations in temperature and operational shock
Avoid and be affected, improve safety in operation.
This researcher is united by the situation that the device of conventional apparatus with the invention carries out extracting vent gas treatment
Meter, its result is as follows:
The cycle that conventional apparatus is run is that 45 days needs are cleared up once, and each parking clearance time is about at about 10h, often
The expense of secondary cleaning, at 4000 yuan, needs to clear up about 8 times the whole year, causes cleaning to spend in 32000 yuan, but also can affect phosphorus
The yield of acid, causes the overall output value to reduce about more than 600 ten thousand yuan；And the cleaning cycle of the invention is more than 90 days, it is seen that its
Enable to cleaning cycle extend, and control at about 4 times so that cleaning up cost decreases 16000 yuan, greatly reduces
The cost of overhaul, but also the cleaning avoiding at least 40h delays so that the yield of phosphoric acid is increased, and increases the output value, has
Imitate reduces disposal costs, decreases stop frequency, reduces energy consumption.
Accompanying drawing explanation
Fig. 1 is phosphoric acid extraction washing tail gas apparatus structure schematic diagram.
Fig. 2 is that in phosphoric acid extraction washing tail gas device, the spray structure in scrubbing tower arranges schematic diagram.
Fig. 3 is the top view that the spray structure of Fig. 2 arranges position.
Fig. 4 is the structural representation of each layer of setting of spray structure.
1-sluicing pipe 2-scrubbing tower a 3-scrubbing tower b 4-scrubbing tower c 5-filters offgas duct 1-1-extraction gas inlet
1-2-spray equipment 1-3-the first shower nozzle 1-4-the second shower nozzle 1-5-the 3rd shower nozzle 1-6-slag-drip opening 1-7-hang plate 1-8-
Gas outlet 2-1-tower a ejects import 2-3-tower a slag-drip opening 2-4-the first spray structure 3-1-tower b top at the bottom of mouthful 2-2-tower a
Import 3-4-tower b slag-drip opening 4-1-tower c evacuation port 4-2-the 3rd spray knot at the bottom of outlet 3-2-the second spray structure 3-3-tower b
Import 6-inlet 7-endless tube 8-spray thrower 8-1-expansion joint at the bottom of structure 4-3-tower c slag-drip opening 4-4-tower c.
Detailed description of the invention
With specific embodiment, technical scheme is further limited below in conjunction with the accompanying drawings, but requirement
The scope of protection is not only limited to description.
Embodiment
As it is shown in figure 1, the wash mill of a kind of phosphoric acid extraction tail gas, including sluicing pipe 1, scrubbing tower a2, scrubbing tower b3, wash
Washing tower c4, filter offgas duct 5, wherein scrubbing tower a2 is ejected a mouthful 2-1 by the tower a being arranged on scrubbing tower a2 tower body top, is arranged on
Scrubbing tower a2 tower body sidewall, near import 2-2 at the bottom of the tower a of bottom, is arranged on the tower a slag-drip opening 2-3 bottom scrubbing tower a2 tower body,
The the first spray structure 2-4 composition being arranged in scrubbing tower a2 tower body；Scrubbing tower b3 is by being arranged on scrubbing tower b3 tower body top
Tower b eject a mouthful 3-1, be arranged on scrubbing tower b3 tower body sidewall near import 3-3 at the bottom of the tower b of bottom, be arranged on scrubbing tower b3 tower
Tower b slag-drip opening 3-4 bottom body, the second spray structure 3-2 composition being arranged in scrubbing tower b3 tower body；Scrubbing tower c4 is by arranging
At the tower c evacuation port 4-1 at scrubbing tower c4 tower body top, it is arranged on scrubbing tower c4 tower body sidewall near import 4-at the bottom of the tower c of bottom
4, it is arranged on the tower c slag-drip opening 4-3 bottom scrubbing tower c4 tower body, is arranged on the 3rd spray structure 4-2 in scrubbing tower c4 tower body
Composition；The sidewall of sluicing pipe 1 is provided with extraction gas inlet 1-1 near top, at its sidewall, bottom is provided with gas and goes out
Mouthful 1-8, is provided with slag-drip opening 1-6, and is internally provided with spray system at sluicing pipe 1 with gas outlet 1-8 relative to position；Wash
Washing import 2-2 at the bottom of gas outlet 1-8 and the tower a of scrubbing tower a2 on pipe 1 to connect, the tower a of scrubbing tower a2 ejects mouthful 2-1 and washing
Import 3-3 connection at the bottom of the tower b of tower b3, the tower b of scrubbing tower b3 ejects import 4-4 at the bottom of mouthful 3-1 and the tower c of scrubbing tower c4 and connects, and
And on communicating pipe between import 4-4 at the bottom of tower b ejects mouthful 3-1 and tower c, it is provided with filtration offgas duct 5.
In order to effectively make the slag in sluicing pipe quickly discharge, it is to avoid the outlet of blocking gas, described washing
Pipe 1 be internally provided with hang plate 1-7, and, the incline direction of hang plate is to slag-drip opening 1-6, hang plate 1-7 and sluicing pipe
The position of the pipe shaft contact of 1 is lower than the position that gas outlet 1-8 and slag-drip opening 1-6 is arranged.
In order to raising spraying effect, reducing spray energy consumption, described spray system, it is managed by being arranged on sluicing pipe 1
The jet head sets of body and the spray equipment 1-2 composition being arranged on sluicing pipe 1 top, wherein jet head sets is by the first shower nozzle 1-3, the second spray
Head 1-4, the 3rd shower nozzle 1-5 composition.
Described jet head sets, the first shower nozzle 1-3 therein is positioned at sluicing pipe 2/1sts three eminence, and less than extraction tail
Gas entrance 1-1 arranges place；Second shower nozzle 1-4 is positioned at sluicing pipe 1/1st two eminence；3rd shower nozzle 1-5 is positioned at sluicing pipe 1 three points
One of eminence.
A diameter of 2000mm of described sluicing pipe 1.
As shown in Figure 2 and Figure 3, the first described spray structure 2-4 is two-layer, and hoop is uniformly distributed by every layer six, two-layer it
Between mutually form staggered 30 ° of angles；The second described spray structure 3-2 is two-layer, and hoop is uniformly distributed, between two-layer by every layer six
Mutually form staggered 30 ° of angles；The 3rd described spray structure 4-2 is four layers, and hoop is uniformly distributed by every layer six, adjacent two layers it
Between mutually form staggered 30 ° of angles.
As shown in Figure 4, described spray structure, it, by spray thrower 8, the endless tube 7 connected with spray thrower 8 tail end, is arranged on
Inlet 6 on endless tube 7 forms, and wherein spray thrower 8 uses expansion joint 8-1 to be connected with endless tube 7.
Described endless tube 7 uses the steel skeleton composite of DN200, utilizes Flange joint so that endless tube 7 is around washing
Tower forms octagonal structure.
Described tower b ejects a mouthful 3-1, on communicating pipe between import 4-4 at the bottom of itself and tower c, is provided with three-way interface, and
Three-way interface is arranged on the communicating pipe pipe bent position of 90 °, before being positioned at and filtering offgas duct 5 link position；The first of three-way interface
Port ejects a mouthful 3-1 with tower b and connects；Second port connects with import 4-4 at the bottom of tower c；Third connectivity mouth enters liquid seal trough, and the 3rd
Port is vertically downward.
Use said apparatus, according to following washing methods, phosphoric acid extraction tail gas is carried out carrying out washing treatment: by extraction tank
Get rid of the extraction tail gas of coming, enter sluicing pipe 1 through extraction gas inlet 1-1, and open sluicing pipe 1 top spray device simultaneously
1-2 so that the ejecting liquid at extraction tail gas and top moves down after being fully contacted, and by the first shower nozzle 1-3, the second shower nozzle 1-
4, the 3rd shower nozzle 1-5 opens so that it forms level Four spray washing to extraction tail gas；Make ejecting liquid at the work of hang plate 7
Under with, to the direction of slag-drip opening 1-6, flowing is got rid of, and the gas sprayed is discharged through gas outlet 1-8, through import at the bottom of tower a
2-2 enters in scrubbing tower a2, from the bottom to top, and is issued to the effect of washing in the effect of the first spray structure 2-4, and from tower a
Eject mouthful 2-1 to discharge；In import 3-3 at the bottom of tower b enters scrubbing tower b3, from the bottom to top, and at the work of the second spray structure 3-2
With being issued to the effect of washing, and eject mouthful 3-1 from tower b and discharge；Through import 4-4 at the bottom of tower c be directly entered scrubbing tower c4 or
Get rid of after the gas come mixes with filtering offgas duct 5, be directly entered scrubbing tower c4 through import 4-4 at the bottom of tower c, from the bottom to top, and
Effect at the 3rd spray structure 4-2 is issued to the effect of washing, and empties from tower c evacuation port 4-1, can complete washing.
Claims (10)
1. the wash mill of a phosphoric acid extraction tail gas, it is characterised in that include sluicing pipe (1), scrubbing tower a (2), scrubbing tower b
(3), scrubbing tower c (4), filter offgas duct (5), wherein scrubbing tower a (2) by be arranged on scrubbing tower a (2) tower body top tower a push up
Outlet (2-1), is arranged on scrubbing tower a (2) tower body sidewall near import at the bottom of the tower a of bottom (2-2), is arranged on scrubbing tower a (2) tower
Tower a slag-drip opening (2-3) bottom body, the first spray structure (2-4) being arranged in scrubbing tower a (2) tower body forms；Scrubbing tower b
(3) it is to be ejected mouth (3-1) by the tower b being arranged on scrubbing tower b (3) tower body top, is arranged on scrubbing tower b (3) tower body sidewall close
Import (3-3) at the bottom of the tower b of bottom, is arranged on tower b slag-drip opening (3-4) bottom scrubbing tower b (3) tower body, is arranged on scrubbing tower b
(3) composition of the second spray structure (3-2) in tower body；Scrubbing tower c (4) is arranged by the tower c being arranged on scrubbing tower c (4) tower body top
Eat dishes without rice or wine (4-1), is arranged on scrubbing tower c (4) tower body sidewall near import at the bottom of the tower c of bottom (4-4), is arranged on scrubbing tower c (4) tower
Tower c slag-drip opening (4-3) bottom body, the 3rd spray structure (4-2) composition being arranged in scrubbing tower c (4) tower body；Sluicing pipe
(1) sidewall is provided with extraction gas inlet (1-1) near top, is provided with gas outlet (1-8) near bottom at its sidewall,
It is provided with slag-drip opening (1-6) with gas outlet (1-8) relative position, and is internally provided with spray system at sluicing pipe (1)；Wash
The gas outlet (1-8) washed on pipe (1) connects with import (2-2) at the bottom of the tower a of scrubbing tower a (2), and the tower a of scrubbing tower a (2) ejects
Mouth (2-1) connects with import (3-3) at the bottom of the tower b of scrubbing tower b (3), and the tower b of scrubbing tower b (3) ejects mouth (3-1) and scrubbing tower c
(4) set in import (4-4) connection, and communicating pipe between import (4-4) at the bottom of tower b ejects mouth (3-1) and tower c at the bottom of tower c
It is equipped with filtration offgas duct (5).
2. the wash mill of phosphoric acid extraction tail gas as claimed in claim 1, it is characterised in that described sluicing pipe (1) interior
Portion is provided with hang plate (1-7), and, the incline direction of hang plate is to slag-drip opening (1-6), hang plate (1-7) and sluicing pipe
(1) position of pipe shaft contact is lower than the position that gas outlet (1-8) and slag-drip opening (1-6) are arranged.
3. the wash mill of phosphoric acid extraction tail gas as claimed in claim 1, it is characterised in that described spray system, its by
The jet head sets being arranged on sluicing pipe (1) pipe shaft and spray equipment (1-2) composition being arranged on sluicing pipe (1) top, wherein shower nozzle
Group is made up of the first shower nozzle (1-3), the second shower nozzle (1-4), the 3rd shower nozzle (1-5).
4. the wash mill of phosphoric acid extraction tail gas as claimed in claim 3, it is characterised in that described jet head sets, therein
First shower nozzle (1-3) is positioned at sluicing pipe (1) 2/3rds eminence, and arranges place less than extraction gas inlet (1-1)；Second spray
Head (1-4) is positioned at sluicing pipe (1) 1/2nd eminence；3rd shower nozzle (1-5) is positioned at sluicing pipe (1) 1/3rd eminence.
5. the wash mill of the phosphoric acid extraction tail gas as described in claim 1 or 2 or 3, it is characterised in that described sluicing pipe
(1) a diameter of 2000mm.
6. the wash mill of phosphoric acid extraction tail gas as claimed in claim 1, it is characterised in that the first described spray structure
(2-4) being two-layer, hoop is uniformly distributed by every layer six, mutually forms staggered 30 ° of angles between two-layer；The second described spray structure
(3-2) being two-layer, hoop is uniformly distributed by every layer six, mutually forms staggered 30 ° of angles between two-layer；The 3rd described spray structure
(4-2) being four layers, hoop is uniformly distributed by every layer six, mutually forms staggered 30 ° of angles between adjacent two layers.
7. the wash mill of phosphoric acid extraction tail gas as claimed in claim 1, it is characterised in that described spray structure, its by
Spray thrower (8), the endless tube (7) connected with spray thrower (8) tail end, the inlet (6) being arranged on endless tube (7) forms, wherein sprays
Drenching device (8) uses expansion joint (8-1) to be connected with endless tube (7).
8. the wash mill of phosphoric acid extraction tail gas as claimed in claim 7, it is characterised in that described endless tube (7) uses
It is the steel skeleton composite of DN200, utilizes Flange joint so that endless tube (7) forms octagonal structure around scrubbing tower.
9. the wash mill of phosphoric acid extraction tail gas as claimed in claim 1, it is characterised in that described tower b ejects mouth (3-
1), on communicating pipe between import (4-4) at the bottom of itself and tower c, it is provided with three-way interface, and three-way interface is arranged on communicating pipe
The pipe bent position of 90 °, before being positioned at and filtering offgas duct (5) link position；First port of three-way interface and tower b eject mouth (3-
1) connection；Second port connects with import (4-4) at the bottom of tower c；Third connectivity mouth enters liquid seal trough, and third connectivity mouth be vertical to
Under.
10. the wash mill of the phosphoric acid extraction tail gas as described in any one of claim 1-9 is for the washing of phosphoric acid extraction tail gas
Method, it is characterised in that extraction tank is got rid of the extraction tail gas of coming, enters sluicing pipe (1) through extraction gas inlet (1-1),
And open sluicing pipe (1) top spray device (1-2) simultaneously so that extraction tail gas is fully contacted backward with the ejecting liquid at top
Lower movement, and the first shower nozzle (1-3), the second shower nozzle (1-4), the 3rd shower nozzle (1-5) are opened so that extraction tail gas is formed by it
Level Four spray washing；Making ejecting liquid under the effect of hang plate (7), to the direction of slag-drip opening (1-6), flowing is got rid of, spray
Complete gas is discharged through gas outlet (1-8), in import at the bottom of tower a (2-2) enters scrubbing tower a (2), from the bottom to top, and
Effect at the first spray structure (2-4) is issued to the effect of washing, and ejects mouth (2-1) discharge from tower a；Through entering at the bottom of tower b
Mouthful (3-3) enters in scrubbing tower b (3), from the bottom to top, and is issued to the effect of washing in the effect of the second spray structure (3-2),
And eject mouth (3-1) discharge from tower b；Through import at the bottom of tower c (4-4) be directly entered scrubbing tower c (4) or with filter offgas duct
(5), after getting rid of the gas mixing come, it is directly entered scrubbing tower c (4) through import at the bottom of tower c (4-4), from the bottom to top, and the 3rd
The effect of spray structure (4-2) is issued to the effect of washing, and empties from tower c evacuation port (4-1), can complete washing.
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| CN201610779254.7A CN106215629A (en) | 2016-08-31 | 2016-08-31 | The washing methods of a kind of phosphoric acid extraction tail gas and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610779254.7A CN106215629A (en) | 2016-08-31 | 2016-08-31 | The washing methods of a kind of phosphoric acid extraction tail gas and device |
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| CN106215629A true CN106215629A (en) | 2016-12-14 |
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Effective date of registration: 20170601 Address after: Guizhou province Guiyang City Kaiyang County 550302 gold town (office building No. 2) Applicant after: Guizhou Kailin group mineral fertilizer limited liability company Address before: No. 237 Jinyang City Kailin Lake District Road 550002 Guizhou city of Guiyang Province Applicant before: Phosphorylcholine group limited-liability company is opened in Guizhou |
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Application publication date: 20161214 |
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