CN1328176C - New comprehensive utilization method of ADC foaming agent condensed mother liquor - Google Patents
New comprehensive utilization method of ADC foaming agent condensed mother liquor Download PDFInfo
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- CN1328176C CN1328176C CNB2005100382685A CN200510038268A CN1328176C CN 1328176 C CN1328176 C CN 1328176C CN B2005100382685 A CNB2005100382685 A CN B2005100382685A CN 200510038268 A CN200510038268 A CN 200510038268A CN 1328176 C CN1328176 C CN 1328176C
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- mother liquor
- liquor
- ammonia
- foaming agent
- alkali
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Abstract
The present invention relates to technology for producing refined chemical products of chemical industry. Condensation mother liquor produced in the production technology of an ADC foaming agent is used; after the condensation mother liquor is regulated to be uniform in a regulation tank, the condensation mother liquor enters an ammonia stripping tower; a proper amount of alkali is added to the condensation mother liquor by a medicine adding system; ammonium ions in the mother liquor are converted into free ammonia under the action of the alkaline; most of the ammonia enters a liquid ammonia recovery system in a gas-phase mode and is recovered; simultaneously, the processed mother liquor enters an oxidation tank, and residual ammonia nitrogen is oxidized by bleaching liquor; simultaneously, a large amount of calcium chloride contained in the bleaching liquor reacts with sulfate radicals in the mother liquor to obtain sparingly soluble calcium sulphate; the calcium sulphate enters a precipitation tank and is precipitated and separated; after the calcium sulphate is recovered, the calcium sulphate as a byproduct is obtained; simultaneously, treated condensation mother liquor which is finally obtained is used as a raw material for production of chloride alkali, and NaCl crude brine is completely recovered and utilized. Thus, the production cost and the wastewater treatment cost of enterprises are reduced; that no condensation mother liquor is discharged is realized; the environment is not polluted.
Description
Technical field
The present invention relates to the production technique of the fine chemical product of chemical industry, refer in particular to a kind of ADC foaming agent condensed mother liquor comprehensive utilization novel method, it utilizes the ADC whipping agent, i.e. Cellmic C 121, and English name is Azodicarbonamide, molecular formula is C
2H
4N
4O
2, the condensed mother liquor that produces in the production technique reclaims liquefied ammonia, and the condensed mother liquor after the improvement that will finally obtain is recycled fully as the raw materials for production NaCl crude brine of chlor-alkali simultaneously, accomplishes " condensed mother liquor " zero release.
Background technology
The present this high density NH that contains of ADC foaming agent condensed mother liquor
3The conventional treatment process of the waste water of-N and high density inorganic salt, the general employing " deamination-→ advance biochemical system to handle-→ qualified discharge " treatment process.Condensed mother liquor is through after adding the alkali deamination, and ammonia nitrogen concentration is still higher, and biochemical system must be set up denitrification functions.Inorganic salt in the waste water (NaCl) to reach can be biochemical concentration (Na+ concentration ≈ 2000～3000mg/L) at least must dilution 30～40 times.So, must set up a day output, just can meet the demands at least in the waste water treatment plant more than ten thousand tons.Simultaneously according to the ADC analysis of Production Technology, not having in its condensed mother liquor can biochemical carbon source, for keeping normal biochemical treatment process, needs other supplementary carbon source.Therefore, reach discharging standards, the processing costs of waste water per ton will reach 30～35 yuan, and the working cost of every day will be up to 9000～10000 yuan.
Reclaim liquefied ammonia, crude brine, condensed mother liquor zero release in the existing ADC foaming agent condensed mother liquor comprehensive utilization technique, at home beyond example still.General processing and utilize method to have: reclaim weak ammonia technology (Chinese patent, application number: 01108022.X); Reclaim lime carbonate technology (Chinese patent, application number: 01108023.X); Bleaching liquor oxidizing process etc.These technologies and this project reclaim liquefied ammonia, reuse crude brine technology is essentially different, and ubiquity recover materials be worth low, condensed mother liquor is handled problems such as not thorough.
Summary of the invention
The purpose of this invention is to provide a kind of ADC foaming agent condensed mother liquor comprehensive utilization novel method, it utilizes the condensed mother liquor that produces in the ADC whipping agent production technique, reclaim liquefied ammonia, the condensed mother liquor after the improvement that will finally obtain is recycled fully as the raw materials for production (NaCl crude brine) of chlor-alkali simultaneously.Described bleaching liquor is to absorb the byproduct that residual nitrogen is so incensed that with liming in the chlor-alkali production process.
The technical scheme that realizes above-mentioned purpose is:
After regulating the ADC foaming agent condensed mother liquor evenly, enter aminoacid stripping tower in equalizing tank, add appropriate bases through medicine system, under the effect of alkali, the ammonium ion in the mother liquor changes free ammonia into, and most ammonia enter the liquefied ammonia recovery system with gas phase and reclaim; Mother liquor after handling simultaneously enters in the oxidation pond with bleaching liquor oxidation residue ammonia-state nitrogen, a large amount of calcium chloride that contain in the bleaching liquor and the reaction of the sulfate radical in the mother liquor simultaneously, obtain sl. sol. calcium sulfate, enter in the settling tank settlement separate, recovery obtains byproduct calcium sulfate, the supernatant liquor that obtains is crude brine, can be used as the raw materials for production reuse in chlor-alkali workshop.
And also the condensed mother liquor after handling through stripping can be adopted Ammonia blowing-out tower further carry out stripping and enter oxidation pond again.
And mother liquor NH in the such scheme
3-N concentration range: 9000～40000mg/L, adopt the caustic soda concentration range: 25%～40%, alkali charge is 26～136Kg/m
3Mother liquor.
Wherein as mother liquor NH
3-N concentration range: 9000～10000mg/L, adopt the caustic soda concentration range: 25%～40%, alkali charge is 26～34Kg/m
3Mother liquor.
Wherein as mother liquor NH
3-N concentration range: 30000～40000mg/L, adopt the caustic soda concentration range: 25%～40%, alkali charge is 84～136Kg/m
3Mother liquor.
And adopt 0.15～0.50m
3Bleaching liquor/m
3Mother liquor joins in the condensed mother liquor behind stripping, and effect is preferable.
Its reaction principle is the CaCl that utilizes in the bleaching liquor
2With the SO in the condensed mother liquor
4 2-Reaction obtains sl. sol. CaSO
4, simultaneously with SO
4 2-Be replaced into Cl
-Utilize the Ca (ClO) in the bleaching liquor again
2Come remaining ammonia-state nitrogen in the oxidative condensation mother liquor.Therefore the ADC foaming agent condensed mother liquor is handled, reclaimed liquefied ammonia, calcium sulfate, and it is converted into the NaCl aqueous solution, as the raw materials for production reuse of chlorine industry.
The invention has the advantages that: in conjunction with the chlor-alkali industry own characteristic, the product caustic soda and the waste water bleaching liquor of comprehensive utilization chlor-alkali industry, simultaneously fully reclaim, utilize the material that produces in the wastewater treatment process: liquefied ammonia, gypsum, crude brine, reduce enterprise's production cost and cost for wastewater treatment, realize the condensed mother liquor zero release, environment is not polluted.
Description of drawings
Fig. 1 process flow diagram of the present invention
Embodiment
Embodiment 1: the lab scale state
1. the clearance of ammonia-state nitrogen and best alkali charge
Get 6 parts of 50mlADC condensed mother liquors, add the caustic soda of different amounts respectively, after the reflux sufficiently long time, measure the residue ammonia nitrogen concentration.
| Add caustic soda amount/g | 0 | 4.95 | 5.05 | 5.10 | 5.15 | 5.20 |
| NH 3-N/mg/L | 37580 | 3750 | 2890 | 2330 | 1690 | 1020 |
| NH 3-N clearance % | 0 | 90.0 | 92.3 | 93.8 | 95.5 | 97.2 |
As calculated, to reach 97% o'clock best alkali charge be 104Kg/m to the ammonia-state nitrogen decreasing ratio
3Mother liquor.
Get the ADC condensed mother liquor that 6 parts of 50ml contain different concns, add different amount caustic soda respectively, after the reflux sufficiently long time, measure the residue ammonia nitrogen concentration.
| Add caustic soda amount/g | 0 | 3.10 | 3.20 | 3.50 | 3.90 | 4.30 |
| NH 3-N/mg/L | 24050 | 2400 | 1680 | 1080 | 720 | 360 |
| NH 3-N clearance % | 0 | 90.0 | 93.0 | 95.5 | 97.0 | 98.5 |
As calculated, to reach 93% o'clock best alkali charge be 64Kg/m to the ammonia-state nitrogen decreasing ratio
3Mother liquor.
2. the oxidation effectiveness of bleaching liquor
Get 6 parts of each 50ml of water sample (average ammonia nitrogen concentration is 1024mg/L) after the distillation, add bleaching liquor 10,12,15,17,20,50ml respectively.Stir, the residue ammonia-state nitrogen is measured in fully reaction.After testing, final ammonia nitrogen concentration is for can't check.
| Add bleaching liquor amount/ml | 10 | 15 | 17 | 20 | 50 |
| NH 3-N/mg/L | 221 | 124 | 74.2 | 0 | 0 |
3. the calcium sulfate purity testing that produces in the oxidising process
The calcium sulfate that produces in the oxidising process is pure white.Measure after removing crystal water, the purity of calcium sulfate is 93～94%.
4. the concentration of NaCl in the crude brine
The concentration of NaCl＞10% in the crude brine after the bleaching liquor oxidation has sizable economic recovery to be worth.
Embodiment 2: the pilot scale state
Treatment capacity is 1m
3/ h, ADC condensed mother liquor NH
3-N mean concns is 10500mg/L.
1. the clearance of ammonia-state nitrogen
| Alkali consumption/kg | 24.2 | 26.2 | 27.0 | 28.9 | 31.6 | 34.0 |
| NH 3-N clearance % | 79.4 | 87.7 | 90.0 | 93.9 | 95.9 | 96.5 |
2. the oxidation effectiveness of bleaching liquor
The Theoretical Mass ratio of ammonia nitrogen and available chlorine is 1: 4.A certain amount of bleaching liquor can make that ammonia nitrogen concentration is lower than 3.11mg/L and replenishes enough calcium chloride in the waste water after the oxidation.The average usage quantity of bleaching liquor is 0.15～0.50m
3/ h.The concentration of NaCl＞10% in the crude brine behind bleaching liquor oxidation, filtering-depositing.
| Condensed mother liquor | Waste water behind the stripping | Waste water after the oxidation | |||
| PH | NH 3-N (mg/L) | PH | NH 3-N (mg/L) | Total ammonium (mg/L) | NaCl (g/L) |
| 5.5 | 9151 | 8 | 711 | Do not detect | 94.9 |
| 6.0 | 10706 | 9 | 960 | 4.48 | 119 |
| 6.0 | 9976 | 9 | 621 | 0.25 | 115 |
3. the calcium sulfate purity testing that produces in the oxidising process
The calcium sulfate that produces in the oxidising process is pure white, and the purity of calcium sulfate was 93～94% (not containing crystal water).Get the precipitation in the oxidization and sedimentation basin, measure the concentration of calcium sulfate, the result is as follows:
| Solid gross weight (g) | CaSO 4(g) | CaSO 4Purity (%) |
| 2.5425 | 2.3412 | 92.1 |
| 2.8436 | 2.6495 | 93.2 |
| 2.4591 | 2.2679 | 92.2 |
| 2.7543 | 2.4813 | 90.1 |
Claims (5)
1. foaming agent condensed mother liquor method of comprehensive utilization, it is characterized in that with whipping agent be after the condensed mother liquor of Cellmic C 121 is regulated evenly in equalizing tank, enter aminoacid stripping tower, add alkali through medicine system, under the effect of alkali, ammonium ion in the mother liquor changes free ammonia into, and most ammonia enter the liquefied ammonia recovery system with gas phase and reclaim; Mother liquor after handling simultaneously enters in the oxidation pond with bleaching liquor oxidation residue ammonia-state nitrogen, a large amount of calcium chloride that contain in the bleaching liquor and the reaction of the sulfate radical in the mother liquor simultaneously, obtain sl. sol. calcium sulfate, enter in the settling tank settlement separate, the byproduct calcium sulfate that recovery obtains, and supernatant liquor is the crude brine as the raw materials for production reuse in chlor-alkali workshop; Mother liquor NH wherein
3-N concentration range: 9000～40000mg/L, adopt the caustic soda concentration range: 25%～40%, alkali charge is 26～136Kg/m
3Mother liquor.
2. foaming agent condensed mother liquor method of comprehensive utilization according to claim 1 is characterized in that adopting Ammonia blowing-out tower further to carry out stripping through the condensed mother liquor after the stripping processing enters oxidation pond again.
3. foaming agent condensed mother liquor method of comprehensive utilization according to claim 1 is characterized in that as mother liquor NH
3-N concentration range: 9000～10000mg/L, adopt the caustic soda concentration range: 25%～40%, alkali charge is 26～34Kg/m
3Mother liquor.
4. foaming agent condensed mother liquor method of comprehensive utilization according to claim 1 is characterized in that as mother liquor NH
3-N concentration range: 30000～40000mg/L, adopt the caustic soda concentration range: 25%～40%, alkali charge is 84～136Kg/m
3Mother liquor.
5. foaming agent condensed mother liquor method of comprehensive utilization according to claim 1 is characterized in that adopting 0.15～0.50m
3Bleaching liquor/m
3Mother liquor joins in the condensed mother liquor behind stripping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100382685A CN1328176C (en) | 2005-01-28 | 2005-01-28 | New comprehensive utilization method of ADC foaming agent condensed mother liquor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100382685A CN1328176C (en) | 2005-01-28 | 2005-01-28 | New comprehensive utilization method of ADC foaming agent condensed mother liquor |
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| Publication Number | Publication Date |
|---|---|
| CN1657428A CN1657428A (en) | 2005-08-24 |
| CN1328176C true CN1328176C (en) | 2007-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100382685A Expired - Fee Related CN1328176C (en) | 2005-01-28 | 2005-01-28 | New comprehensive utilization method of ADC foaming agent condensed mother liquor |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100410193C (en) * | 2006-06-12 | 2008-08-13 | 江苏大学 | Method for treating wastewater from ADC vesicant, and integrated plant |
| CN102153157B (en) * | 2010-12-09 | 2012-07-25 | 河南煤业化工集团有限责任公司 | ADC (Azodicarbonamide) foaming agent condensation mother liquor as well as washing waste water recycling device and method |
| CN106745951A (en) * | 2015-11-25 | 2017-05-31 | 衡阳市锦轩化工有限公司 | A kind of production wastewater treatment method of ADC foaming agents |
| CN106698561B (en) * | 2016-12-29 | 2019-05-21 | 哈尔滨工程大学 | A kind of urea method preparation ADC foaming agent biruea condensation sewage-treatment plant and its application method |
| CN108164042A (en) * | 2018-01-17 | 2018-06-15 | 湖南工业大学 | A kind of ammonia nitrogen waste water processing with high salt and the method for fluorine silicon resource |
| CN108314263A (en) * | 2018-02-28 | 2018-07-24 | 江苏大学 | A kind of ADC foaming agent condensed mother liquors treatment process |
| CN108862323A (en) * | 2018-05-28 | 2018-11-23 | 湖南工业大学 | Sodium fluoride co-producing white carbon black is produced using ammonia nitrogen waste water fluorine silicon resource metaplasia with high salt |
| CN109607910B (en) * | 2018-11-27 | 2020-02-07 | 江西世龙实业股份有限公司 | System and method for treating AC foaming agent production wastewater |
| CN111362840A (en) * | 2020-04-15 | 2020-07-03 | 山东阳谷华泰化工股份有限公司 | Method for recycling ammonia from accelerator DPG mother liquor in production process to synthesize accelerator DPG through recycling |
| CN115960019A (en) * | 2022-12-30 | 2023-04-14 | 江苏索普化工股份有限公司 | Method for treating ADC foaming agent condensation mother liquor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1513835A (en) * | 2003-07-15 | 2004-07-21 | ֣���� | Recovery method of heavily polluated substance produced during production of foaming agent and device |
| CN1513834A (en) * | 2003-07-15 | 2004-07-21 | ֣���� | Recovery method of heavily polluted substance produced in ADC foaming agent production process and its device |
-
2005
- 2005-01-28 CN CNB2005100382685A patent/CN1328176C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1513835A (en) * | 2003-07-15 | 2004-07-21 | ֣���� | Recovery method of heavily polluated substance produced during production of foaming agent and device |
| CN1513834A (en) * | 2003-07-15 | 2004-07-21 | ֣���� | Recovery method of heavily polluted substance produced in ADC foaming agent production process and its device |
Non-Patent Citations (3)
| Title |
|---|
| ADC发泡剂生产的"三废"治理与综合利用 吕友余，化工生产与技术，第1期 1995;我国ADC发泡剂的生产概况何三废处理 吕友余，氯盐工业，第7期 1994 * |
| ADC发泡剂生产的"三废"治理与综合利用 吕友余，化工生产与技术，第1期 1995 * |
| 我国ADC发泡剂的生产概况何三废处理 吕友余，氯盐工业，第7期 1994 * |
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| CN1657428A (en) | 2005-08-24 |
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