CN108079745A - A kind of H acid monosodium salt tail gas alkaline cleaning technique - Google Patents
A kind of H acid monosodium salt tail gas alkaline cleaning technique Download PDFInfo
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- CN108079745A CN108079745A CN201711206693.XA CN201711206693A CN108079745A CN 108079745 A CN108079745 A CN 108079745A CN 201711206693 A CN201711206693 A CN 201711206693A CN 108079745 A CN108079745 A CN 108079745A
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- gas
- passed
- monosodium salt
- tail gas
- acid monosodium
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- 238000004140 cleaning Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 35
- QPILZZVXGUNELN-UHFFFAOYSA-N sodium;4-amino-5-hydroxynaphthalene-2,7-disulfonic acid Chemical compound [Na+].OS(=O)(=O)C1=CC(O)=C2C(N)=CC(S(O)(=O)=O)=CC2=C1 QPILZZVXGUNELN-UHFFFAOYSA-N 0.000 title claims abstract 10
- 239000007789 gas Substances 0.000 claims abstract description 67
- 239000003513 alkali Substances 0.000 claims abstract description 31
- 239000003518 caustics Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000008569 process Effects 0.000 claims abstract description 18
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000010791 quenching Methods 0.000 claims abstract description 13
- 230000000171 quenching effect Effects 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 11
- 239000000292 calcium oxide Substances 0.000 claims abstract description 8
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 8
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 7
- 235000011116 calcium hydroxide Nutrition 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 5
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000428 dust Substances 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 238000002203 pretreatment Methods 0.000 claims abstract description 4
- 230000001681 protective effect Effects 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 17
- 239000012670 alkaline solution Substances 0.000 claims description 10
- 239000002250 absorbent Substances 0.000 claims description 6
- 230000002745 absorbent Effects 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 239000012716 precipitator Substances 0.000 claims description 6
- 239000003500 flue dust Substances 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 239000012266 salt solution Substances 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- ZETCGWYACBNPIH-UHFFFAOYSA-N azane;sulfurous acid Chemical compound N.OS(O)=O ZETCGWYACBNPIH-UHFFFAOYSA-N 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 229940117728 pre milk Drugs 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000002912 waste gas Substances 0.000 abstract description 2
- QPILZZVXGUNELN-UHFFFAOYSA-M sodium;4-amino-5-hydroxynaphthalene-2,7-disulfonate;hydron Chemical compound [Na+].OS(=O)(=O)C1=CC(O)=C2C(N)=CC(S([O-])(=O)=O)=CC2=C1 QPILZZVXGUNELN-UHFFFAOYSA-M 0.000 description 13
- 239000002253 acid Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 6
- 230000007812 deficiency Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- -1 H acid monosodium salts Chemical class 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000000505 pernicious effect Effects 0.000 description 2
- HMNPDEGBVWDHAR-UHFFFAOYSA-N 8-aminonaphthalen-1-ol Chemical class C1=CC(O)=C2C(N)=CC=CC2=C1 HMNPDEGBVWDHAR-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical class Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical class [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000000987 azo dye Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002790 naphthalenes Chemical class 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000985 reactive dye Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- B01D53/1431—Pretreatment by other processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
-
- 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
- B01D53/1431—Pretreatment by other processes
- B01D53/145—Pretreatment by separation of solid or liquid material
-
- 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
- B01D53/1456—Removing acid components
-
- 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
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
-
- 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
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- 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
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D2251/604—Hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D2251/606—Carbonates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D2251/608—Sulfates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
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- Chemical & Material Sciences (AREA)
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- General Chemical & Material Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention provides a kind of H acid monosodium salt tail gas alkaline cleaning technique, belongs to H acid monosodium salt production technical field of waste gas treatment, includes the following steps：S1：Cooling, less than 100 DEG C are cooled to by H acid monosodium salt tail gas through quenching apparatus；S2：Gas is passed through dust removal by filtration in cleaner by dedusting；S3：Gas is passed into water scrubber, dissolves part SO by water-washing pre-treatment2, oxides of nitrogen gas；S4：Alkali cleaning pre-processes：Gas is passed into alkali cleaning pretreatment unit, by milk of lime by from water scrubber come out gas in more than 99% SO2It absorbs；S5：Alkali cleaning is handled, and gas is passed into caustic wash tower and is handled, and the remaining sour gas in alkali cleaning pretreatment unit out is absorbed in caustic wash tower；S6：Protective treatment is purified, residual gas is passed through in solid unit, quick lime is filled in solid unit, removes the steam come out from caustic wash tower in gas, operating status of the present invention is stablized, and technique purifying rate is high, and operating cost is relatively low, and security is more preferable.
Description
Technical field
The invention belongs to H acid monosodium salts to produce technical field of waste gas treatment, and in particular to a kind of H acid monosodium salt tail gas alkaline cleaning
Technique.
Background technology
H acid (1- amino-8-naphthols -3,6- disulfonic acid) is a kind of important naphthalene series dye intermediate, mainly for the production of
Acid, reactive dye and azo dyes, it can also be used to pharmaceuticals industry.Domestic H acid production processes are generally using refined naphthalene as raw material, through sulphur
The processes such as change, nitrification, neutralization, reduction, alkali fusion and acid out are made.Sulfuric acid is added in acid out process or the single sodium of H acid is precipitated in hydrochloric acid
Salt, gained waste liquor after filtering belong to high concentration, highly acidity, the H acid producing waste waters of high salinity and high chroma, and in H acid monosodium salt
In production process, some gases being harmful to for environment are inevitably generated, these pernicious gases are once directly discharged
Into in air, then immeasurable influence can be caused on air, therefore the pernicious gas how eliminated in its production process has
Important research significance, and major pollutants discharged generate for boiler combustion during our known production H acid monosodium salts
Flue dust, SO2、NO2；SO in technical process2, nitrogen oxides etc..
Therefore it is badly in need of a kind of operating status to stablize, technique purifying rate is high, and operating cost is relatively low, and the better H acid of security
Mono-sodium salt tail gas alkaline cleaning technique.
The content of the invention
The object of the present invention is to provide a kind of H acid monosodium salt tail gas alkaline cleaning technique, operating status is stablized, technique purifying rate
Height, operating cost is relatively low, and security is more preferable.
The present invention provides following technical solutions：
A kind of H acid monosodium salt tail gas alkaline cleaning technique, includes the following steps：S1：Cooling, by H acid monosodium salt tail gas by pipeline
After collection less than 100 DEG C are cooled to through quenching apparatus；S2：Gas from quenching apparatus out is passed through cleaner by dedusting
Middle dust removal by filtration, more than 99% flue dust in the tail gas of place to go；S3：Water-washing pre-treatment, by the gas from cleaner out
Water scrubber is passed into, and part SO is dissolved for carrying out water spray processing by gas therein in water scrubber2, nitrogen oxidation
Object gas；S4：Alkali cleaning pre-processes：Gas from water scrubber out is passed into alkali cleaning pretreatment unit, alkali cleaning pretreatment
Milk of lime is inserted in device, by milk of lime by from water scrubber come out gas in more than 99% SO2It absorbs；S5：Alkali cleaning
Gas from alkali cleaning pretreatment unit out is passed into caustic wash tower and handles by processing, will be come out in alkali cleaning pretreatment unit
Remaining sour gas absorbed in caustic wash tower；S6：Protective treatment is purified, the residual gas from caustic wash tower out is passed through
In solid unit, quick lime is filled in solid unit, removes the steam come out from caustic wash tower in gas, and cause not only can be with
For to carry out the gas absorbing state in judgement process unit, and then can be judged by detecting the response situation of quick lime
The response situation of lye solution absorbent that is, once there is sulfur-bearing or the appearance of nitrogenous salt, then reflects alkali in caustic wash tower
The deficiency of property solution, so as to carry out the addition or replacement of alkaline solution much sooner, so as to avoid because of lye not
Enough, the phenomenon that acid tail gas purification is insufficient caused by so that the safety and sealing performance of entire process unit are more preferable.
Preferably, quenching apparatus is the cooling tower for being covered with recirculated cooling water pipeline on inner wall so that cooling tower cooling effect
More preferably.
Preferably, deduster is fiber bag precipitator so that dust removing effects can more optimize with process costs.
Preferably, deduster is water rotation type deduster and the fiber bag precipitator, and the air inlet of water rotation type deduster
It is connected with the air inlet of quenching apparatus, the gas outlet of water rotation type deduster is connected with the air inlet of fiber bag precipitator so that removes
The effect of dirt is more preferable.
Preferably, the absorbent in caustic wash tower is alkaline solution, and alkaline solution is sodium hydroxide, sodium carbonate liquor or sulfurous
Sour hydrogen ammonium salt solution so that alkaline solution is more preferable for the absorption absorbing state of sour gas.
The beneficial effects of the invention are as follows：Before carrying out alkali cleaning operation for tail gas by using caustic wash tower, carry out cooling and remove
Dirt, so as to get rid of the flue dust in tail gas so that be dissolved into the acid in water or in alkali cleaning pretreatment unit or caustic wash tower
Property gas purity higher, convenient for the secondary use of collection liquid, and between caustic wash tower with afterwards respectively set alkali cleaning pre-process fill
It puts and solid unit, so as to realize the use reduced for caustic wash tower neutral and alkali absorbent, it is molten to reduce technical process alkalescence
The danger that the frequent shape of liquid is replaced, and process costs can be also reduced on the basis of tail gas absorption rate is not reduced, and solid
In body device quick lime is set to completely cut off tail gas so that not only can for can by detecting the response situation of quick lime, i.e., one
There is sulfur-bearing in denier or nitrogenous salt occurs, then the deficiency of caustic wash tower neutral and alkali solution is reflected, so as to much sooner
Carry out alkaline solution addition or replacement, so as to avoid because lye deficiency, caused by acid tail gas purification it is insufficient
Phenomenon so that the safety and sealing performance of entire process unit more preferably cause entire process unit safety and sealing performance more
It is good.
Description of the drawings
Attached drawing is used for providing a further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
Example is applied together for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the process flow chart of the present invention；
Specific embodiment
As shown in Figure 1, a kind of process flow chart of H acid monosodium salt tail gas alkaline cleaning technique, in the present embodiment, including as follows
Step：
S1：It is cooled down in quenching apparatus, 50 is cooled to through quenching apparatus after H acid monosodium salt tail gas is collected by pipeline
DEG C, wherein the absorbing quantity of the tail gas in pipeline is 50000-70000Nm3/ h, quenching apparatus are to be covered with recirculated cooling water on inner wall
The cooling tower of pipeline so that cooling tower cooling effect is more preferable；
S2：Dedusting is carried out in bag filter, the gas from quenching apparatus out is passed through in cleaner and is filtered
Dedusting, more than 99% flue dust in the tail gas of place to go, and deduster are fiber bag precipitator so that dust removing effects and process costs
Can more it optimize；
S3：Water-washing pre-treatment is carried out in water scrubber, the gas from cleaner out is passed into water scrubber, and
For carrying out water spray processing by gas therein in water scrubber, part SO is dissolved2, oxides of nitrogen gas；
S4：Alkali cleaning pretreatment is carried out in alkali cleaning pretreatment unit：Gas from water scrubber out is passed into alkali cleaning
In pretreatment unit, milk of lime is inserted in alkali cleaning pretreatment unit, it will be from the gas that water scrubber comes out by milk of lime
More than 99% SO2It absorbs；
S5：Alkali cleaning processing is carried out in caustic wash tower, the gas from alkali cleaning pretreatment unit out is passed into caustic wash tower
Middle processing absorbs the remaining sour gas in alkali cleaning pretreatment unit out, the absorbent in caustic wash tower in caustic wash tower
For alkaline solution, alkaline solution is sodium hydroxide solution；
S6：Purification protective treatment is carried out in solid unit, the residual gas from caustic wash tower out is passed through solid unit
In, quick lime is filled in solid unit, removes the steam come out from caustic wash tower in gas, and cause not only can be for can be with
By detecting the response situation of quick lime, to carry out the gas absorbing state in judgement process unit, and then lye solution is judged
The response situation of absorbent that is, once there is sulfur-bearing or the appearance of nitrogenous salt, then reflects caustic wash tower neutral and alkali solution
Deficiency, so as to carry out the addition or replacement of alkaline solution much sooner, so as to avoid because of lye deficiency, caused by
The phenomenon that acid tail gas purification is insufficient so that the safety and sealing performance of entire process unit are more preferable.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, although with reference to foregoing reality
Example is applied the present invention is described in detail, it for those skilled in the art, still can be to foregoing each implementation
Technical solution recorded in example modifies or carries out equivalent substitution to which part technical characteristic.All essences in the present invention
With within principle, any modifications, equivalent replacements and improvements are made should all be included in the protection scope of the present invention god.
Claims (5)
1. a kind of H acid monosodium salt tail gas alkaline cleaning technique, which is characterized in that include the following steps：
S1：Cooling, less than 100 DEG C are cooled to after H acid monosodium salt tail gas is collected by pipeline through quenching apparatus；
S2：Gas from the quenching apparatus out is passed through dust removal by filtration in cleaner, in the tail gas of place to go by dedusting
More than 99% flue dust；
S3：Gas from the cleaner out is passed into water scrubber by water-washing pre-treatment, and right in the water scrubber
In carrying out water spray processing by gas therein, part SO is dissolved2, oxides of nitrogen gas；
S4：Alkali cleaning pre-processes：Gas from the water scrubber out is passed into alkali cleaning pretreatment unit, the alkali cleaning is pre-
Milk of lime is inserted in processing unit, by the milk of lime by from the water scrubber come out gas in more than 99% SO2
It absorbs；
S5：Alkali cleaning is handled, and the gas from the alkali cleaning pretreatment unit out is passed into caustic wash tower and is handled, by the alkali
The remaining sour gas in pretreatment unit out is washed to absorb in caustic wash tower；
S6：Protective treatment is purified, the residual gas from the caustic wash tower out is passed through in solid unit, the solid unit
In be filled with quick lime, remove from the caustic wash tower come out gas in steam.
2. a kind of H acid monosodium salt tail gas alkaline cleaning technique according to claim 1, which is characterized in that the quenching apparatus is
It is covered with the cooling tower of recirculated cooling water pipeline on inner wall.
3. a kind of H acid monosodium salt tail gas alkaline cleaning technique according to claim 1, which is characterized in that the deduster is cloth
Sack cleaner.
4. a kind of H acid monosodium salt tail gas alkaline cleaning technique according to claim 1, which is characterized in that the deduster is water
Rotating deduster and the fiber bag precipitator, and the air inlet of the air inlet of the water rotation type deduster and the quenching apparatus
It is connected, the gas outlet of the water rotation type deduster is connected with the air inlet of the fiber bag precipitator.
5. a kind of H acid monosodium salt tail gas alkaline cleaning technique according to claim 1, which is characterized in that in the caustic wash tower
Absorbent is alkaline solution, and the alkaline solution is sodium hydroxide, sodium carbonate liquor or bisulfite ammonium salt solution.
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