CN207667435U - The absorption plant of sulfur dioxide in a kind of sulfuric-acid production tail gas - Google Patents
The absorption plant of sulfur dioxide in a kind of sulfuric-acid production tail gas Download PDFInfo
- Publication number
- CN207667435U CN207667435U CN201721675211.0U CN201721675211U CN207667435U CN 207667435 U CN207667435 U CN 207667435U CN 201721675211 U CN201721675211 U CN 201721675211U CN 207667435 U CN207667435 U CN 207667435U
- Authority
- CN
- China
- Prior art keywords
- tower
- tail gas
- desulfuration absorbing
- circulating slot
- absorbing tower
- 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.)
- Expired - Fee Related
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 56
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229940032330 sulfuric acid Drugs 0.000 title claims abstract description 28
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 83
- 239000007789 gas Substances 0.000 claims abstract description 58
- 239000007921 spray Substances 0.000 claims abstract description 44
- 239000002002 slurry Substances 0.000 claims abstract description 41
- 230000023556 desulfurization Effects 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 230000003647 oxidation Effects 0.000 claims abstract description 19
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 19
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 28
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 14
- 229910019142 PO4 Inorganic materials 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 5
- 239000010452 phosphate Substances 0.000 claims description 5
- 229910052731 fluorine Inorganic materials 0.000 claims 1
- 239000011737 fluorine Substances 0.000 claims 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052698 phosphorus Inorganic materials 0.000 abstract 1
- 239000011574 phosphorus Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 5
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a kind of absorption plants of sulfur dioxide in sulfuric-acid production tail gas, including desulfuration absorbing tower, defluorinate tower and circulating slot, desulfuration absorbing tower lower end is stretched into circulating slot and liquid valve is arranged on discharge nozzle, desulfuration absorbing tower is internally provided with desulfurization spray equipment, desulfuration absorbing tower side and top are respectively arranged with tail gas air inlet pipe and demister, gas outlet at the top of desulfuration absorbing tower is connected with defluorinate tower, and defluorinate tower is connected with defluorinate liquid bath；The side of circulating slot is connected with oxidation trough by aoxidizing pump, the other side of circulating slot is connected with slurry vessel by four-way connection, first of four-way connection is provided with shurry pump between interface and slurry vessel, second is also equipped with shurry pump between interface and circulating slot, it is connected by pipeline between third interface and circulating slot, the 4th is connected between interface and desulfurization spray equipment by pipeline；The HF gases generated when phosphorus ore desulfurization can be absorbed and utilized in the utility model, while desulfurization degree being made to improve.
Description
Technical field
The utility model is related to apparatus for absorbing SO 2 technical fields, and in particular to dioxy in a kind of sulfuric-acid production tail gas
Change the absorption plant of sulphur.
Background technology
When gas washing in SA production, sulfur dioxide in tail gas is main pollutant in air, not only toxic to human body, simultaneously also
The main reason for being generation acid rain, therefore it is essential, present chemical industry production to carry out desulfurization to sulfuric-acid production tail gas
The device of sulfuric acid and phosphoric acid is organic whole, and in phosphorizing treatment, phosphorous chemical industry enterprise sulfuric acid apparatus tail gas removes SO2Technique master
If absorbing the SO in sulfuric acid apparatus tail gas using ore pulp absorbing liquid2, react and generate sulphite and phosphoric acid, sulphite is in oxygen
Change in dashpot and is oxidized to sulfate.The method does not generate solid waste, non-secondary pollution, the sulfur-bearing mine of sulfur dioxide absorption
Slurry is directly sent to phosphoric acid extraction device phosphoric acid, is a kind of more green flue gas desulfurization technique, there is higher economy, Environmental Effect
Benefit.
But current absorption plant is during reaction, because there are Ca in phosphate ore pulp5F(PO4)3, therefore be discharged to big
Part HF gases can be contained in desulfidation tail gas in gas, and HF gases belong to inorganic gaseous pollutant, a large amount of discharges are necessarily to big
Gas generates harmful effect, and secondly sulfuric acid tail gas enters after desorption receives in sulphur tower in existing absorption plant, air velocity quickly, gas
Stream is directly flushed at the top of desulfuration absorbing tower, is formd the non-uniform rapidly ascending air in part, is unfavorable for complete with spray equipment
Face contacts, and reduces desulfuration efficiency, in addition in absorption plant, when sulphite and phosphoric acid are transported to oxidation trough, still
The spray in desulfuration absorbing tower is so carried out using the slurry reacted, causes once in a while to occur in tail gas in desulfuration absorbing tower gas outlet
SO2Exceeded situation, to make desulfurization degree more decline to a great extent；Therefore, a kind of gas washing in SA production that desulfurization degree is high is developed
The absorption plant of sulfur dioxide in tail gas is desirability.
Utility model content
The purpose of this utility model is to provide a kind of absorption dresses of sulfur dioxide in sulfuric-acid production tail gas that desulfurization degree is high
It sets.
The purpose of this utility model is achieved in that the utility model includes desulfuration absorbing tower, defluorinate tower and circulating slot,
Desulfuration absorbing tower lower part is mounted on the top of circulating slot by holder, and desulfuration absorbing tower lower end is stretched into circulating slot, and desulfurization is inhaled
It receives and liquid valve is set on the discharge nozzle of tower lower end, desulfuration absorbing tower is internally provided with desulfurization spray equipment, desulfurization spray equipment
The desulfuration absorbing tower side of lower section is provided with tail gas air inlet pipe, and the top of desulfuration absorbing tower is provided with demister, desulfuration absorbing tower
The gas outlet at top is connected with the bottom of defluorinate tower, and defluorinate tower is connected with defluorinate liquid bath, defluorinate tower top by defluorinate spray equipment
Portion is provided with exhaust pipe；The side of the circulating slot is connected with oxidation trough by aoxidizing pump, and the other side of circulating slot passes through four-way
Connector is connected with slurry vessel, and first of four-way connection is provided with shurry pump between interface and slurry vessel, second interface with follow
It is also equipped with shurry pump between annular groove, is connected by pipeline between third interface and circulating slot, the 4th interface is sprayed with desulfurization
It is connected by pipeline between shower device.
Further, desulfurization spray equipment includes the spray tube being arranged in parallel from top to bottom in desulfuration absorbing tower and inclination
The down-set airflow-distribution board below spray tube, spray tube are connected by parallel transistor with four-way connection；Airflow-distribution board is handed over
Mistake is arranged on the inner wall of desulfuration absorbing tower；Two mixing components, the setting oxygen supply of mixing component bottom are symmetrical arranged in oxidation trough
Outlet；Demister is more than two layers；Oxidation trough is connected to the extraction tank in phosphoric acid workshop by extracting pump；Slurry vessel is connected to phosphoric acid vehicle
Between phosphate ore pulp production equipment.
The utility model is further processed reaction life in desulfuration absorbing tower by the way that defluorinate tower is arranged in desulfuration absorbing tower side
At HF gases, keep the tail gas after desulfurization more pure, while the spray equipment inside desulfuration absorbing tower being transformed, make into
Tail gas and the spray equipment comprehensive engagement for entering desulfuration absorbing tower lower part, reach better desulfurization effect, the lower end of desulfuration absorbing tower
Being arranged in circulating slot, and between circulating slot and desulfuration absorbing tower is connected to by the discharge nozzle with liquid valve, the one of circulating slot
Side is connected with oxidation trough, and the other side allows the supply of the slurry selectivity in slurry vessel to spray by the setting of two shurry pumps
Shower device and circulating slot, and slurry can also be supplied into spray equipment by circulating slot simultaneously, in this way by sulphite and
When phosphoric acid is extracted into oxidation trough, does not use the slurry reacted to carry out the spray in desulfuration absorbing tower, but use unreacted
The slurry crossed, while liquid valve being closed, the exhaust pipe of such defluorinate tower, which is drained into the sulfuric acid tail gas in air, to be occurred
SO2Exceeded situation, the slurry being newly added in desulfuration absorbing tower will not be mixed with the slurry for completing to react so that entire dress
The desulfurization degree set is greatly improved.
Description of the drawings
Fig. 1 is the utility model overall structure diagram.
In figure：1- slurry vessels, 2- shurry pumps, 21- four-way connections, 3- circulating slots, 4- demisters, 5- desulfuration absorbing towers, 6-
Oxidation pump, 51- airflow-distribution boards, 52- spray tubes, the gas outlets 53-, 54- tail gas air inlet pipe, 55- liquid valves, 7- defluorinate towers, 8-
Defluorinate liquid bath, 9- oxidation troughs, 91- oxygen supplys outlet, 10- extraction pumps.
Specific implementation mode
The utility model will be further described below with reference to the accompanying drawings, but is not subject in any way to the utility model
Limitation belongs to the scope of protection of the utility model based on any changes and modifications made by the utility model introduction.
As shown in Figure 1, the utility model includes desulfuration absorbing tower 5, defluorinate tower 7 and circulating slot 3, it is characterised in that：It is described
5 lower part of desulfuration absorbing tower is mounted on the top of circulating slot 3 by holder, and 5 lower end of desulfuration absorbing tower is stretched into circulating slot 3, takes off
Liquid valve 55 is set on the discharge nozzle of 5 lower end of sulphur absorption tower, and desulfuration absorbing tower 5 is internally provided with desulfurization spray equipment, desulfurization
5 side of desulfuration absorbing tower below spray equipment is provided with tail gas air inlet pipe 54, and the top of desulfuration absorbing tower 5 is provided with demister
4, the gas outlet 53 at 5 top of desulfuration absorbing tower is connected with the bottom of defluorinate tower 7, and defluorinate tower 7 is connected with by defluorinate spray equipment
Defluorinate liquid bath 8,7 top of defluorinate tower are provided with exhaust pipe；The side of the circulating slot 3 is connected with oxidation trough 9 by aoxidizing pump 6,
The other side of the circulating slot 3 is connected with slurry vessel 1, first interface and slurry of the four-way connection 21 by four-way connection
It is provided with shurry pump 2 between slot 1, shurry pump 2, third interface and cycle are also equipped between second interface and circulating slot 3
It is connected by pipeline between slot 3, the 4th is connected between interface and desulfurization spray equipment by pipeline.
The desulfurization spray equipment includes the spray tube 52 being arranged in parallel from top to bottom in desulfuration absorbing tower 5 and is tilted towards
The lower airflow-distribution board 51 being arranged below spray tube 52, each spray tube 52 pass through parallel transistor and 21 phase of four-way connection
Even；51 interlaced arrangement of the airflow-distribution board is on the inner wall of desulfuration absorbing tower 5.
Two mixing components, mixing component bottom setting oxygen supply outlet 91 are symmetrical arranged in oxidation trough 9；Demister 4 is more than
Two layers；Oxidation trough 9 is connected to the extraction tank in phosphoric acid workshop by extracting pump 10；Slurry vessel 1 is connected to the phosphate ore pulp in phosphoric acid workshop
Production equipment.
When device works, the phosphate ore pulp produced in phosphoric acid plant is sent to slurry vessel 1, sulfuric acid is passed through by tail gas air inlet pipe 54
Tail gas, desulfurization spray equipment spray slurry into desulfuration absorbing tower 5, and sulfuric acid tail gas enters behind 5 lower part of desulfuration absorbing tower on rapidly
It rises, it, can only be along the gap between the inner wall and gas distribution grid 51 of desulfuration absorbing tower 5 by the prevention of gas distribution grid 51
It rises, when rising to 51 top of gas distribution grid, comes into full contact with and react with the slurry of 52 inner ejection of spray tube, sulfuric acid tail gas
Rise again, the SO in sulfuric acid tail gas2Desulphurization reaction occurs with slurry again, is sprayed by the spray tube 52 being arranged in parallel up and down
The desulfurization effect of sulfuric acid tail gas is good afterwards, but contains Ca in slurry5F(PO4)3Therefore reaction will produce some HF gases, after desulfurization
Sulfuric acid tail gas leads to defluorinate tower 7 after 4 demisting of demister, and the sulfuric acid tail gas into defluorinate tower 7 is sprayed by defluorinate spray equipment
After processing, HF gases are absorbed, and sulfuric acid tail gas then can be directly drained into from the exhaust pipe at 7 top of defluorinate tower in air；Defluorinate
The defluorinate liquid of spray equipment derives from defluorinate liquid bath 8, and the slurry that desulfurization spray equipment needs is first derived from slurry vessel 1, together
When liquid valve 55 open, the slurry in slurry vessel 1 is transported to desulfurization spray equipment by shurry pump 2, and slurry is filled with sulfuric acid tail gas
It is flowed in circulating slot 3 after point haptoreaction, when the liquid level in circulating slot 3 reaches setting value, slurry vessel 1 is no longer sprayed to desulfurization
Device provides slurry, but provides the slurry reacted from circulating slot 3 to desulfurization spray equipment, when defluorinate tower 7 is discharged in air
SO2Exit concentration drop to setting value, and when the slurry pH value in circulating slot 3 is up to 4.5~5.5, liquid valve 55 is closed, together
When new slurry is provided from slurry vessel 1 to desulfurization spray equipment, the reaction in circulating slot 3 slurry 6 be transported to by aoxidizing pump
In oxidation trough 9, the mixing component in oxidation trough 9 provides oxygen to 9 lower part of oxidation trough while agitating, keeps sulphite thorough
Bottom is oxidized to sulfate, and after the completion of the slurry pipeline transport in circulating slot 3, liquid valve 55 is again turned on, when the liquid level in circulating slot 3 again
It is secondary to provide the slurry reacted from circulating slot 3 to desulfurization spray equipment again when reaching setting value, and the processing of oxidation trough 9 is completed
Slurry be sent directly into phosphoric acid plant through extraction pump 10 and be recycled；So cycle realizes continual processing sulfuric acid tail
Gas.
Claims (7)
1. the absorption plant of sulfur dioxide in a kind of sulfuric-acid production tail gas, including desulfuration absorbing tower（5）, defluorinate tower（7）And cycle
Slot（3）, it is characterised in that：The desulfuration absorbing tower（5）Lower part is mounted on circulating slot by holder（3）Top, and desulfurization inhale
Receive tower（5）Circulating slot is stretched into lower end（3）In, desulfuration absorbing tower（5）Liquid valve is set on the discharge nozzle of lower end（55）, desulfurization absorption
Tower（5）Be internally provided with desulfurization spray equipment, the desulfuration absorbing tower below desulfurization spray equipment（5）Side be provided with tail gas into
Tracheae（54）, desulfuration absorbing tower（5）Top be provided with demister（4）, desulfuration absorbing tower（5）The gas outlet at top（53）With it is de-
Fluorine tower（7）Bottom be connected, defluorinate tower（7）It is connected with defluorinate liquid bath by defluorinate spray equipment（8）, defluorinate tower（7）Top is set
It is equipped with exhaust pipe；The circulating slot（3）Side pass through aoxidize pump（6）It is connected with oxidation trough（9）, the circulating slot（3）It is another
Side is connected with slurry vessel by four-way connection（1）, the four-way connection（21）First interface and slurry vessel（1）Between set
It is equipped with shurry pump（2）, second interface and circulating slot（3）Between be also equipped with shurry pump（2）, third interface and circulating slot
（3）Between connected by pipeline, the 4th is connected between interface and desulfurization spray equipment by pipeline.
2. the absorption plant of sulfur dioxide in a kind of sulfuric-acid production tail gas according to claim 1, it is characterised in that：It is described
Desulfurization spray equipment is included in desulfuration absorbing tower（5）The multiple spray tubes being inside arranged in parallel from top to bottom（52）Be inclined at
Spray tube（52）The airflow-distribution board of lower section（51）, each spray tube（52）Pass through a total delivery pipe and four-way connection
（21）It is connected.
3. the absorption plant of sulfur dioxide in a kind of sulfuric-acid production tail gas according to claim 2, it is characterised in that：It is described
Airflow-distribution board（51）Interlaced arrangement is in desulfuration absorbing tower（5）Inner wall on.
4. the absorption plant of sulfur dioxide in a kind of sulfuric-acid production tail gas according to claim 1, it is characterised in that：It is described
Oxidation trough（9）It is interior to be symmetrical arranged two mixing components, the setting oxygen supply outlet of mixing component bottom（91）.
5. the absorption plant of sulfur dioxide in a kind of sulfuric-acid production tail gas according to claim 1, it is characterised in that：It is described
Demister（4）More than two layers.
6. the absorption plant of sulfur dioxide in a kind of sulfuric-acid production tail gas according to claim 1, it is characterised in that：It is described
Oxidation trough（9）It is pumped by extracting（10）It is connected to the extraction tank in phosphoric acid workshop.
7. the absorption plant of sulfur dioxide in a kind of sulfuric-acid production tail gas according to claim 1, it is characterised in that：It is described
Slurry vessel（1）It is connected to the phosphate ore pulp production equipment in phosphoric acid workshop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721675211.0U CN207667435U (en) | 2017-12-06 | 2017-12-06 | The absorption plant of sulfur dioxide in a kind of sulfuric-acid production tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721675211.0U CN207667435U (en) | 2017-12-06 | 2017-12-06 | The absorption plant of sulfur dioxide in a kind of sulfuric-acid production tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207667435U true CN207667435U (en) | 2018-07-31 |
Family
ID=62966075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721675211.0U Expired - Fee Related CN207667435U (en) | 2017-12-06 | 2017-12-06 | The absorption plant of sulfur dioxide in a kind of sulfuric-acid production tail gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207667435U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111495164A (en) * | 2020-04-26 | 2020-08-07 | 昆明理工大学 | Method and device for desulfurization and denitrification of flue gas by combination of yellow phosphorus excitation and ozone production with ore pulp |
-
2017
- 2017-12-06 CN CN201721675211.0U patent/CN207667435U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111495164A (en) * | 2020-04-26 | 2020-08-07 | 昆明理工大学 | Method and device for desulfurization and denitrification of flue gas by combination of yellow phosphorus excitation and ozone production with ore pulp |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180731 |
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| CF01 | Termination of patent right due to non-payment of annual fee |