CN100376472C - Method for utilizing low-concentration waste sulfuric acid through multi-effect concentration and flash evaporation - Google Patents
Method for utilizing low-concentration waste sulfuric acid through multi-effect concentration and flash evaporation Download PDFInfo
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- CN100376472C CN100376472C CNB200610050367XA CN200610050367A CN100376472C CN 100376472 C CN100376472 C CN 100376472C CN B200610050367X A CNB200610050367X A CN B200610050367XA CN 200610050367 A CN200610050367 A CN 200610050367A CN 100376472 C CN100376472 C CN 100376472C
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 238000001704 evaporation Methods 0.000 title claims abstract description 37
- 230000008020 evaporation Effects 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000002699 waste material Substances 0.000 title claims abstract description 14
- 230000000694 effects Effects 0.000 claims abstract description 50
- 238000010438 heat treatment Methods 0.000 claims abstract description 49
- 239000002253 acid Substances 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 238000007701 flash-distillation Methods 0.000 claims description 11
- 230000009102 absorption Effects 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 239000012141 concentrate Substances 0.000 claims description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 8
- 229910052717 sulfur Inorganic materials 0.000 claims description 8
- 239000011593 sulfur Substances 0.000 claims description 8
- 238000009834 vaporization Methods 0.000 claims description 6
- 230000008016 vaporization Effects 0.000 claims description 6
- 239000006200 vaporizer Substances 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 abstract description 3
- 239000002351 wastewater Substances 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000012452 mother liquor Substances 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010842 industrial wastewater Substances 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect 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
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010795 gaseous waste Substances 0.000 description 1
- 230000009395 genetic defect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000032696 parturition Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a method for utilizing low-concentration waste sulfuric acid by multiple-effect concentration and flash evaporation, which comprises the following steps: introducing low-concentration waste sulfuric acid into a multi-effect heating evaporation system, heating dilute sulfuric acid in a first-effect heating chamber by using raw steam, evaporating the dilute sulfuric acid in the first-effect heating chamber by using a first-effect evaporation chamber, heating acid in a second-effect heating chamber by using generated first-effect secondary steam, evaporating the acid in a third-effect heating chamber by using generated second-effect secondary steam, performing gas-liquid separation, and vacuumizing to remove generated steam; in each effect, sulfuric acid in the heating chamber and the evaporator circularly flows; the low-concentration waste sulfuric acid is sequentially subjected to triple-effect, double-effect and single-effect countercurrent evaporation or single-effect, double-effect and triple-effect concurrent evaporation and then concentrated to a concentration of more than 30%; the concentrated sulfuric acid enters a flash evaporation chamber, and is vacuumized and flashed to form sulfuric acid with the concentration of at least 45%. The method has high recovery rate of the waste sulfuric acid, greatly reduces the discharge amount of sewage and has considerable economic benefit.
Description
Technical field
The present invention relates to the wastewater treatment in the field of environment protection, especially relate to the useless vitriolic comprehensive treating process recoverying and utilizing method of a kind of high polluted low concentration.
Background technology
Usually the acid of the sulfur waste of lower concentration adopts following method to handle:
1, adopts the shunting of removing contamination, use in the lime and the method for absorption to the mother liquor material, thereby can produce the solid refuse of a large amount of secondary pollutions, still have a large amount of pollution factors and suspended substance in the waste water after handling simultaneously, and also need with after the washes of certain acidity mixes, again through the degraded of iron carbon tower with carry out a biological disposal upon, thereby bring very big difficulty to wastewater treatment, consumption of natural resource and cost have very big harm to the biochemical treatment bacterial classification significantly.
2, adopt carbon degraded of mother liquor washing lotion blended iron and biochemical treatment process, can consume iron powder and expensive chemical reagent greatly.
3, adopt additive method: as ozone, electrolysis and strong oxidizer method also exist energy consumption big, the cost height, and manpower is wasted problems such as big.
In a word, just at present ubiquity and is had high input in the relevant wastewater processing technology of usefulness, and energy consumption is big, and cost is big, and workload is big, defectives such as poor processing effect, and final treatment effect is not satisfactory.The low concentrated acid of high pollution is unmanned so far to adopt spissated method, mainly is that cost recovery is too high, and in low vitriolic corrodibility too strong.
Summary of the invention
The invention provides a kind of treatment process of lower concentration sulfur waste acid comprehensive reutilization, the recovery utilization rate height significantly reduces the sewage emissions amount, and economic benefit is considerable.
A kind of multiple-effect concentrates and flash distillation utilizes the lower concentration vitriolic method of giving up, and comprising:
(1) with the sulfuric acid of concentration about 10%, i.e. lower concentration sulfur waste acid imports multiple-effect heating evaporation system, and each effect heating evaporation system is made up of a heating chamber and a vaporizer;
(2) with giving birth to the lower concentration sulfur waste acid heating of steam to an effect heating chamber, acid absorbs heat after an effect evaporator room evaporation produces one and imitates secondary steam; One effect secondary steam is to the acid heating of two effect heating chambers, and the two acid heat absorptions of imitating produce two and imitate secondary steams after two effect evaporator rooms evaporate; Two imitate the acid heating of secondary steam to the triple effect heating chamber, and the acid heat absorption of triple effect is after the evaporation of triple effect evaporation chamber after gas-liquid separation, vacuumizes the steam that produces;
(3) during each was imitated, sulfur waste acid circulated between heating chamber and vaporizer;
(4) acid of lower concentration sulfur waste successively through triple effect, two imitate, one imitate countercurrent evaporation after or be more than 30% through one imitating, two imitate, being concentrated into concentration after the triple effect following current evaporation;
(5) sulfuric acid after concentrating enters the flash vaporization chamber, vacuumizes to carry out becoming after the flash distillation concentration and be at least 45% sulfuric acid.
The effect quantity of described multiple-effect heating evaporation system is more than three grades.
Described living vapor pressure is 0.4～0.7MPa.
Described flash vaporization chamber vapor pressure is 0.03～0.01MPa.
Multiple-effect of the present invention concentrates the back sulfuric acid concentration can reach 30～75%, and the sulfuric acid concentration after the flash distillation can reach 45～95%.Present method steam obtains the utilization more than three times, has reduced energy consumption effectively.In general, but concentration is about 45% sulfuric acid has reached utility value.
The inventive method can be saved energy consumption method required when concentrating greatly, solved the discharging that dense sulfur waste acid and pollution factor are hanged down in a large amount of high pollutions in the industrial production at all, reduce the discharging that a large amount of suspended substances exist a large amount of COD, BOD pollutant effluents that contains after handling, avoided using in original treatment process the genetic defects of lime neutralizing treatment, renewable resource such as use lime, iron powder, activated sludge, clorox, PAM have been avoided, can reduce the generation of a large amount of secondary pollutants, reduce the discharging of industrial gaseous waste; Investment and needed raw-material fund have been reduced simultaneously because of the needed a large amount of equipment of Industrial Wastewater Treatment.
The inventive method technology is simple, easy to operate, avoided the realistic problem of biochemical treatment of industrial wastewater difficulty, solved the problem of the high COD of sewage after the traditional industry wastewater treatment, handle waste water by the inventive method and can create a large amount of economic worths, the inventive method is handled waste water, make waste water useless, turn waste into wealth, can recycle, both reduced the discharging of waste water, minimizing can be created a large amount of economic benefits again to the pressure of environmental protection, produces a large amount of social benefits, accomplish the resource circulation utilization, for handling the very good treatment process of environmental protection and economy of low-concentration industrial waste water.
Description of drawings
Adverse current concentrated and the flash process flow diagram when Fig. 1 adopted triple effect for the inventive method;
Fig. 2 concentrates and the flash process flow diagram for the inventive method adopts the triple effect following current.
Embodiment
Various wastewater mother liquors are mixed the back survey acidity, require greater than 10% above sulfuric acid concentration, preferably high more good more, otherwise can cause reclaiming difficulty, mother liquor is stored in 500M
3Vat in, carry out the batch homogenizing, then mixed mother liquor water is got in the multiple-effect heating evaporation system and concentrated, carry out decolorization filtering before also can preferably concentrating, so that remove a part of impurity, avoid the obstruction of pipeline and vaporizer in the multiple-effect heating evaporation service system, carry out multiple-effect then and concentrate.
As Fig. 1, the sulfuric acid of 10% left and right sides concentration enters the triple effect well heater, utilizes the living steam of 0.4～0.7MPa that one acid of imitating heating chamber is heated, and acid absorbs heat after the evaporator room evaporation produces an effect secondary steam; Its secondary steam is to the acid heating of two effect heating chambers, and the two acid heat absorptions of imitating produce two and imitate secondary steams after two effect evaporator rooms evaporate; Its secondary steam is to the acid heating of triple effect heating chamber, and the acid heat absorption of this effect is after the evaporation of triple effect evaporation chamber after gas-liquid separation, vacuumizes the steam that produces; During each was imitated, diluted acid circulated between heating chamber and evaporator room; Diluted acid becomes about 40% acid through triple effect, two effects, after imitating evaporation successively, enters flash evaporator, and the steam of flash evaporator heating usefulness is imitated secondary steam from one, and the process flash distillation becomes the sulfuric acid more than 45% after vacuumizing.In this method, steam obtains three times and utilizes, and reduced energy consumption effectively, but the sulfuric acid more than 45% has reached utility value.
As Fig. 2, the sulfuric acid of 10% left and right sides concentration enters one and imitates well heater, utilizes the living steam of 0.4～0.7MPa that one acid of imitating heating chamber is heated, and acid absorbs heat after the evaporator room evaporation produces an effect secondary steam; Its secondary steam is to the acid heating of two effect heating chambers, and the two acid heat absorptions of imitating produce two and imitate secondary steams after two effect evaporator rooms evaporate; Its secondary steam is to the acid heating of triple effect heating chamber, and the acid heat absorption of this effect is after the evaporation of triple effect evaporation chamber after gas-liquid separation, vacuumizes the steam that produces; During each was imitated, diluted acid circulated between heating chamber and evaporator room; Diluted acid is successively through one imitating, two imitate, become about 35% acid after the triple effect evaporation, and about 35% acid of triple effect evaporation enters flash evaporator, and the steam of flash evaporator heating usefulness is imitated secondary steam from one, becomes the sulfuric acid more than 45% after vacuumizing.In this method, steam obtains three times equally and utilizes, and has reduced energy consumption effectively.
The inventive method controlling index:
1, pressure:
One imitates steam: 0.4～0.7MPa
One imitates evaporator room, imitates secondary steam: 0.18～0.28MPa
Two imitate heating chamber, two imitates secondary steam: 0.02～0.04MPa
Triple effect evaporation chamber: 0.03～0.01MPa (cutting off)
Flash vaporization chamber: 0.03～0.01MPa (cutting off)
2, temperature:
The living steam of one effect＜180 ℃, one imitates evaporator room: 130～145 ℃
Two imitate evaporator room: 105～120 ℃
Triple effect evaporation chamber: 70～95 ℃
Flash vaporization chamber: 85～100 ℃
3, concentration:
One imitates concentration: more than 30%
Concentration is imitated in flash distillation: more than 45%
4, vacuum tightness (limit) 0.005MPa (cutting off)
The equipment that the present invention adopts is made by graphite or lass lining as heating chamber, evaporator room, can be made up of above heating chamber of triple effect and evaporator room.
Claims (4)
1. a multiple-effect concentrates and flash distillation utilizes the lower concentration vitriolic method of giving up, and comprising:
(1) sulfuric acid with concentration about 10% imports multiple-effect heating evaporation system, and each effect heating evaporation system is made up of a heating chamber and a vaporizer;
(2) with the sulfuric acid heating of steam to the concentration about 10% of an effect heating chamber, acid absorbs heat after an effect evaporator room evaporates, and produces one and imitate secondary steam; One effect secondary steam is to the acid heating of two effect heating chambers, and the two acid heat absorptions of imitating produce two and imitate secondary steams after two effect evaporator rooms evaporate; Two imitate the acid heating of secondary steam to the triple effect heating chamber, and the acid heat absorption of triple effect is after the evaporation of triple effect evaporation chamber after gas-liquid separation, vacuumizes the steam that produces;
(3) during each was imitated, sulfur waste acid circulated between heating chamber and vaporizer;
(4) sulfuric acid of concentration about 10% successively through triple effect, two imitate, one imitate countercurrent evaporation after or be more than 30% through one imitating, two imitate, being concentrated into concentration after the triple effect following current evaporation successively;
(5) sulfuric acid after concentrating enters the flash vaporization chamber, vacuumizes to carry out becoming after the flash distillation concentration and be at least 45% sulfuric acid.
2. multiple-effect according to claim 1 concentrates and flash distillation utilizes the lower concentration vitriolic method of giving up, and it is characterized in that: the effect quantity of described multiple-effect heating evaporation system is more than three grades.
3. multiple-effect according to claim 1 concentrates and flash distillation utilizes the lower concentration vitriolic method of giving up, and it is characterized in that: described vapor pressure is 0.4～0.7MPa.
4. multiple-effect according to claim 1 concentrates and flash distillation utilizes the lower concentration vitriolic method of giving up, and it is characterized in that: described flash vaporization chamber vapor pressure is 0.03～0.01MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200610050367XA CN100376472C (en) | 2006-04-14 | 2006-04-14 | Method for utilizing low-concentration waste sulfuric acid through multi-effect concentration and flash evaporation |
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| CNB200610050367XA CN100376472C (en) | 2006-04-14 | 2006-04-14 | Method for utilizing low-concentration waste sulfuric acid through multi-effect concentration and flash evaporation |
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| CN1865128A CN1865128A (en) | 2006-11-22 |
| CN100376472C true CN100376472C (en) | 2008-03-26 |
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| CN101933592B (en) * | 2010-09-13 | 2012-11-14 | 四川省吉香居食品有限公司 | Preparation method of salted vegetable concentrated liquid |
| CN102583853B (en) * | 2012-01-05 | 2013-08-21 | 浙江金科过氧化物股份有限公司 | Combined treatment method for two kinds of waste acid water generated in tetraacetylethylenediamine (TAED) production |
| CN102701302B (en) * | 2012-06-18 | 2013-07-31 | 济南大学 | Experiment method for eluent regeneration in chromatographic column preparation and organic matter separation experiment |
| CN103122071B (en) * | 2013-03-15 | 2015-10-21 | 南京高捷轻工设备有限公司 | The polyglycol solution concentration method that Multi-effect plate type evaporation and flash distillation combine |
| CN105858621B (en) * | 2016-04-12 | 2017-10-27 | 钮德明 | A kind of method that use gas-liquid contact method concentrates titanium white waste acid |
| CN106854026B (en) * | 2016-10-28 | 2020-11-20 | 江苏迈达新材料股份有限公司 | Method for treating 2, 6-di-tert-butyl-p-methylphenol production waste liquid |
| CN109888424A (en) * | 2019-03-20 | 2019-06-14 | 河北港安环保科技有限公司 | A kind of processing system of waste and old lead acid accumulator electrolyte |
| CN112090096A (en) * | 2019-09-18 | 2020-12-18 | 上海巨道环保科技有限公司 | Sodium sulfide MVR plate type evaporation process |
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|---|---|---|---|---|
| US522885A (en) * | 1894-07-10 | Railway-switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US522885A (en) * | 1894-07-10 | Railway-switch |
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