CN207748980U - A kind of sodium azide sewage disposal dedicated system - Google Patents
A kind of sodium azide sewage disposal dedicated system Download PDFInfo
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- CN207748980U CN207748980U CN201721743787.6U CN201721743787U CN207748980U CN 207748980 U CN207748980 U CN 207748980U CN 201721743787 U CN201721743787 U CN 201721743787U CN 207748980 U CN207748980 U CN 207748980U
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- waste water
- storage tank
- reaction kettle
- sodium azide
- pipeline
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Abstract
The utility model discloses a kind of sodium azide sewage disposal dedicated system, including storage tank, processing unit and reaction kettle, it is characterized in that the storage tank includes acid waste water storage tank, alkaline waste water storage tank, acid waste water storage tank is connected with continuous centrifuge, alkaline waste water storage tank is connected by pipeline with destilling tower, reaction kettle is connected with aqueous sodium hypochlorite solution storage tank and acid waste water filtrate tanks, and pipeline is provided with exhaust gas processing device at the top of reaction kettle, the utility model has the beneficial effects that:Using the sulfate radical removal of calcium hydroxide effective solution, while reducing the energy consumption generated by decrease temperature crystalline, the slightly soluble characteristic of calcium sulfate plays the role of buffering, is convenient for the control of technique；The ingenious combination of each tank body meets the concerted reaction of sodium hypochlorite and potassium permanganate, make to realize the removal to sodium azide under mild acid conditions, the manganese dioxide especially generated plays the role of catalyst, accelerates the reaction speed that sodium azide resolves into nitrogen.
Description
Technical field
The utility model belongs to chemical engineering sewage processing technology field, and it is special to relate more specifically to a kind of sodium azide sewage disposal
Use system.
Background technology
Sodium azide is a kind of material medicine of medicine, can be used in the preparation of antihypertensive drugs, but sodium azide is also
A kind of severe poisonous chemicals can destroy the oxidation-reduction process of body, generate the hemoglobin of denaturation, silently confused so as to cause head
Etc. symptoms, the central nervous system of human body can be damaged by being discharged into environment.However, the meeting in sodium azide production process
Two kinds of waste water are generated, one is the acid waste waters containing 30-40% sodium sulphate, in addition to this also contain on a small quantity in acid waste water
Sodium nitrite and sulfuric acid, another kind are to contain spirituous alkaline waste water, in addition to this, the also hydrogen containing 20-30% in alkaline waste water
The hydrazine hydrate of the sodium azide and 2-5% of sodium oxide molybdena and 5-10%.
Using conventional acid-base neutralization reaction, after acid waste water and alkaline waste water are mixed, point of sodium azide can be caused
Solution generates a large amount of toxic gas nitrogen hydracid.
Scientific paper《Sodium azide produces method for treating wastewater research》The processing method for disclosing sodium azide sewage, fills
Divide and have studied various substances in acidic environment for the decomposition reaction of sodium azide, but the paper is oxidation with sodium nitrite
Agent directly mixes acid waste water and alkaline waste water, and due to containing a large amount of salt ion in mixed liquor, pH is difficult control, and should
It studies the cooling deposition method used sodium sulfate crystal is precipitated, this method energy consumption is high, difficult in actual industrialized production
To realize.
After acid waste water is utilized calcium hydroxide or oxidation calcium precipitate with conventional means, pH maintains weak acid after acid-base neutralization
Property or alkaline condition, the removal of sodium azide is cannot achieve in the method that the paper illustrates, for nitrous in the paper
Sour sodium, sodium hypochlorite only have a significant effect for the removal of sodium azide in acid condition.
Therefore how to seek the Azide that a kind of energy consumption is relatively low, sodium azide removal efficiency is high and non-secondary pollution object generates
The method and special equipment of sodium sewage are extremely urgent.
Invention content
To solve the above problems, overcome the deficiencies in the prior art, the utility model provides that energy consumption is relatively low, sodium azide is gone
Except the special equipment for the sodium azide sewage that efficient and non-secondary pollution object generates, can effective solution energy consumption it is higher and sour
The problem of alkali neutralization secondary pollution generates.
The utility model solve above-mentioned technical problem specific technical solution be：The processing method of sodium azide sewage is folded
Sodium nitride sewage includes alkaline waste water and acid waste water, and feature includes：The sodium azide sewage disposal dedicated system, packet
Include storage tank, processing unit and reaction kettle, it is characterised in that：The storage tank includes acid waste water storage tank, alkaline waste water storage tank, ethyl alcohol
Storage tank, alkaline waste water processing liquid storage tank, acid waste water filtrate tanks and aqueous sodium hypochlorite solution storage tank, the processing unit include
Continuous centrifuge, destilling tower and leaf filter, the alkaline waste water storage tank are connected by pipeline with destilling tower, the destilling tower
Top be connected with ethanol storage tank, the bottom of destilling tower and alkaline waste water processing liquid storage tank are connected, the alkaline waste water treatment fluid
Storage tank is connected by pipeline with reaction kettle, and the acid waste water storage tank is connected by pipeline with continuous centrifuge, it is described continuously from
Scheming is provided with solid-phase outlet and liquid-phase outlet, and liquid-phase outlet is connected by pipeline with acid waste water filtrate tanks, the acidity
Waste water filtrate tanks bottom is connected by pipeline with reaction kettle, and acid waste water filtrate tanks side is provided with microsyringe I, institute
State aqueous sodium hypochlorite solution storage tank side and be provided with microsyringe II, microsyringe I and microsyringe II respectively with instead
Kettle is answered to be connected, the reactor bottom is connected by pipeline with leaf filter, is provided with by pipeline at the top of the reaction kettle
Exhaust gas processing device is provided with sodium nitrite and aqueous sodium hypochlorite solution in the exhaust gas processing device.
Further, the destilling tower is arranged to three layers.
Further, it is both provided with agitating device in the acid waste water storage tank and reaction kettle, the agitating device includes
Stirring motor, stirring rod and stirring slurry.
Further, safety valve, exhaust gas processing device setting are both provided at the top of the reaction kettle with exhaust gas processing device
There is exhaust-valve.
The utility model has the beneficial effects that：The present apparatus is reduced using the sulfate radical removal of calcium hydroxide effective solution
While the energy consumption generated by decrease temperature crystalline, the slightly soluble characteristic of calcium sulfate plays the role of buffering, pH maintained centainly
In the range of, it is convenient for the control of technique；The ingenious combination of each tank body meets the concerted reaction of sodium hypochlorite and potassium permanganate, makes
The removal to sodium azide is realized under mild acid conditions, the manganese dioxide especially generated plays the role of catalyst, adds
Speed sodium azide resolves into the reaction speed of nitrogen.
Description of the drawings：
Attached drawing 1 is the utility model sewage disposal dedicated system structural schematic diagram；
In attached drawing：1. leaf filter, 2. exhaust gas processing devices, 3. safety valves, 4. exhaust-valves, 5. sodium hypochlorite
Water-soluble liquid storage tank, 6. microsyringes II, 7. microsyringes I, 8. acid waste water filtrate tanks, 9. continuous centrifuges,
10. acid waste water storage tank, 11. ethanol storage tanks, 12. alkaline waste water storage tanks, 13. destilling towers, 14. alkaline waste water treatment fluids
Storage tank, 15. reaction kettles.
Specific implementation mode：
Detail is used for the purpose of to fully understand the embodiments of the present invention in the description of the utility model,
But as it will be appreciated by those skilled in the art that the implementation of the utility model is not limited to these details.In addition, well known
Structure and function is not described in detail or shows, to avoid the main points of the utility model embodiment have been obscured.For this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Specific embodiment of the present utility model：The sodium azide sewage disposal dedicated system, including storage tank, processing dress
It sets and reaction kettle 15, it is characterised in that：The storage tank include acid waste water storage tank 10, alkaline waste water storage tank 12, ethanol storage tank 11,
Alkaline waste water processing liquid storage tank 14, acid waste water filtrate tanks 8 and aqueous sodium hypochlorite solution storage tank 5, the processing unit include
Continuous centrifuge 9, destilling tower 13 and leaf filter 1, the alkaline waste water storage tank 12 are connected by pipeline with destilling tower 13, institute
The top for stating destilling tower 13 is connected with ethanol storage tank 11, and the bottom of destilling tower 13 is connected with alkaline waste water processing liquid storage tank 14, institute
It states alkaline waste water processing liquid storage tank 14 by pipeline to be connected with reaction kettle 15, the acid waste water storage tank 10 is by pipeline and continuously
Centrifuge 9 is connected, and the continuous centrifuge 9 is provided with solid-phase outlet and liquid-phase outlet, and liquid-phase outlet passes through pipeline and spent acidic
Filter liquor storage tank 8 is connected, and 8 bottom of acid waste water filtrate tanks is connected by pipeline with reaction kettle 15, acid waste water filtrate
8 side of storage tank is provided with microsyringe I 77, and 5 side of aqueous sodium hypochlorite solution storage tank is provided with microsyringe II 6,
Microsyringe I 7 is connected with reaction kettle 15 respectively with microsyringe II 6,15 bottom of the reaction kettle by pipeline with it is board-like
Filter 1 is connected, and 15 top of the reaction kettle is provided with exhaust gas processing device 2 by pipeline, is set in the exhaust gas processing device 2
It is equipped with sodium nitrite and aqueous sodium hypochlorite solution.
Further, the destilling tower 13 is arranged to three layers.
Further, agitating device, the agitating device are both provided in the acid waste water storage tank 10 and reaction kettle 15
Including stirring motor, stirring rod and stirring slurry.
Further, 15 top of the reaction kettle and exhaust gas processing device 2 are both provided with safety valve 3, exhaust gas processing device 2
It is provided with exhaust-valve 4.
The application method of the utility model sodium azide sewage disposal dedicated system is as follows：
I takes 1000kg acid waste waters that calcium hydroxide is added in acid waste water storage tank 10 is sufficiently stirred and adjusts pH to 4-5, utilize
Continuous centrifuge 9 centrifuges, and obtains acid waste water filter cake and acid waste water filtrate；
II distills the alkaline waste water of alkaline waste water storage tank 12 using destilling tower 13, and pressure is -0.09MPa, temperature
It is 80 DEG C, obtains alkaline waste water treatment fluid and ethanol solution；
The III alkaline waste water treatment fluid 1000kg for obtaining step II is imported in reaction kettle 15, and it is solid that potassium permanganate is added
Then acid waste water filtrate described in 1000kg in acid waste water filtrate tanks 8 is imported reaction kettle 15 by body 2kg, stir, and is used
Acid waste water filtrate is added in the mode that stream adds, and adjusting pH is 7-8；
IV adds mass fraction to be 20% aqueous sodium hypochlorite solution 5kg in the stream of reaction kettle 15, and stirring utilizes leaf filter 1
Filtering obtains processing water and waste residue；The exhaust gas that reaction kettle 15 generates is handled through exhaust gas processing device 2 simultaneously, vent gas treatment dress
It sets and is provided with sodium nitrite and aqueous sodium hypochlorite solution in 2.
It is special useless to generate two kinds in sodium azide production process in order to more intuitively show the advantage of the utility model
Water, one is acid waste water, containing the alkaline waste water that 30-40% sodium sulphate and a small amount of sodium nitrite and sulfuric acid, another kind are,
Hydrazine hydrate containing a large amount of alcohol, the sodium azide of the sodium hydroxide of 20-30% and 5-10% and 2-5%；Under condition of different pH,
Different oxidants are handled, with the utility model carry out Processing Example, and from different oxidants at different pH into
Row reaction comparison, design parameter are as shown in table 1：According to GB 26754-2011, the measurement of sodium azide content is carried out；And it will production
Raw tail gas is collected cooling treatment, and nitrogen hydracid content is measured using triumphant formula nitriding；"+" is detection nitrogen hydracid, and "-" is not
Detect nitrogen hydracid；No there is gas to generate as stoichiometric point, calculating reacting time to detect out：
Compare case 1
Alkaline waste water is distilled using destilling tower, pressure is -0.09MPa, and temperature is 80 DEG C, is obtained at alkaline waste water
Manage liquid and ethanol solution；The alkaline waste water treatment fluid 1000kg that will be obtained is added 3 kg of sodium hypochlorite solid, then uses sulphur
Aqueous acid tune pH to 2.0, adds water to be settled to 2000L；
Compare case 2
Alkaline waste water is distilled using destilling tower, pressure is -0.09MPa, and temperature is 80 DEG C, is obtained at alkaline waste water
Manage liquid and ethanol solution；The alkaline waste water treatment fluid 1000kg that will be obtained is added 3 kg of potassium permanganate solid, then uses sulphur
Aqueous acid tune pH to 2.0 adds water to be settled to 2000 L；
Compare case 3
Alkaline waste water is distilled using destilling tower, pressure is -0.09MPa, and temperature is 80 DEG C, is obtained at alkaline waste water
Manage liquid and ethanol solution；The alkaline waste water treatment fluid 1000kg that will be obtained is added 3 kg of sodium hypochlorite solid, then uses sulphur
Aqueous acid tune pH to 7.5 adds water to be settled to 2000 L；
Compare case 4
Alkaline waste water is distilled using destilling tower, pressure is -0.09MPa, and temperature is 80 DEG C, is obtained at alkaline waste water
Manage liquid and ethanol solution；1000 kg of alkaline waste water treatment fluid that will be obtained is added 3 kg of potassium permanganate solid, then uses
Aqueous sulfuric acid tune pH to 7.5 adds water to be settled to 2000 L；
Compare case 5
Alkaline waste water is distilled using destilling tower, pressure is -0.09MPa, and temperature is 80 DEG C, is obtained at alkaline waste water
Manage liquid and ethanol solution；2 kg of potassium permanganate solid is added in 1000 kg of alkaline waste water treatment fluid that will be obtained, and is added secondary
1 kg of sodium chlorate solid adds water to be settled to 2000 L then with aqueous sulfuric acid tune pH to 7.5；
Compare case 6
Alkaline waste water is distilled using destilling tower, pressure is -0.09MPa, and temperature is 80 DEG C, is obtained at alkaline waste water
Manage liquid and ethanol solution；1000 kg of alkaline waste water treatment fluid that will be obtained is added 2 kg of potassium permanganate solid, is added two
1 kg of manganese oxide solid adds water to be settled to 2000 L then with aqueous sulfuric acid tune pH to 7.5；
Case study on implementation 7
Calcium hydroxide is added in 1000g acid waste waters and is sufficiently stirred and adjusts pH to 4-5, is centrifuged, is obtained using continuous centrifuge
To acid waste water filter cake and acid waste water filtrate；Alkaline waste water is distilled using destilling tower, pressure is -0.09MPa, temperature
It is 80 DEG C, obtains alkaline waste water treatment fluid and ethanol solution；Gao Meng is added in obtained 1000 kg of alkaline waste water treatment fluid
Then the acid waste water filtrate is added in sour 2 kg of potassium solid, stirring, and it is 7.5 to adjust pH；Stream plus quality in reaction step III
5 kg of aqueous sodium hypochlorite solution that score is 20%, adds water to be settled to 2000 L, and agitation and filtration obtains processing water and waste residue.
Table 1：The embodiment basic parameter of the present apparatus compares
| Group number | Sample | Alkaline waste water treatment fluid total amount kg | React pH | Reactant I | Reactant II | Reaction time min | Nitrogen hydracid | Sodium azide residual quantity mg/l | Sodium azide clearance rate % |
| 1 | Comparative example 1 | 1000 | 2.0 | Sodium hypochlorite | - | 30 | + | 6.2 | 98.76 |
| 2 | Comparative example 2 | 1000 | 2.0 | Potassium permanganate | - | 20 | + | 3.7 | 99.26 |
| 3 | Comparative example 3 | 1000 | 7.5 | Sodium hypochlorite | - | 30 | - | 326 | 34.8 |
| 4 | Comparative example 4 | 1000 | 7.5 | Potassium permanganate | - | 20 | - | 74 | 85.2 |
| 5 | Comparative example 5 | 1000 | 7.5 | Sodium hypochlorite | Potassium permanganate | 20 | - | 10.3 | 97.94 |
| 6 | Comparative example 6 | 1000 | 7.5 | Sodium hypochlorite | Manganese dioxide | 20 | - | 132 | 73.6 |
| 7 | Test group 7 | 1000 | 7.5 | Sodium hypochlorite | Potassium permanganate | 20 | - | 8.6 | 98.28 |
It is analyzed from the basic data of table 1：Wherein by comparative example 1 and 2 it is found that sodium hypochlorite and potassium permanganate acidity item
It is fine for the elimination effect of sodium azide under part, and under strongly acidic conditions, but have a small amount of nitrogen hydracid detection；By comparing
It is very poor for the elimination effect of sodium azide under sodium hypochlorite known to example 3 and 4 or potassium permanganate weak basic condition；By comparative example 5
Known to sodium hypochlorite and potassium permanganate be used in conjunction with, can have obviously to the elimination effect of sodium azide under weak basic condition
Effect；From comparative example 3,5 and 6：Potassium permanganate can be under weak basic condition to sodium azide for sodium azide
Elimination effect has obvious effects on, while shortening the reaction time, may be with the manganese dioxide of generation for point of sodium azide
Solution plays that catalytic action is related, therefore the embodiment 7 of this technique is compared with comparative example 1-6, effective solution strong acid environment
The decomposition of middle sodium azide leads to the problem of a small amount of nitrogen hydracid, while sodium hypochlorite and potassium permanganate are used in conjunction with, can be weak
The elimination effect of sodium azide is had obvious effects under alkaline condition；Especially sodium hypochlorite and potassium permanganate is used in conjunction with
Use substantially reduce the reaction time while ensure that the elimination effect of sodium azide.
In summary：The present apparatus is realized the reduction of acid waste water salinity after traditional technique removes sulfate radical,
Ensure that being smoothed out for subsequent technique, avoid cooling deposition method by sodium sulfate crystal be precipitated energy consumption it is high, in actual work
The problem of being difficult to realize in the production of industry metaplasia；Simultaneously by optimizing the connection structure of tank body, realize efficiently fast under the conditions of weak base
Decomposition of the speed to sodium azide avoids sodium azide and is easy to lead to the problem of nitrogen hydracid under strongly acidic conditions, especially magical
Discovery sodium hypochlorite and being used in conjunction with for potassium permanganate can have efficient synergistic effect for the decomposition of sodium azide, and
And the reaction time is substantially reduced, production cost is reduced, production efficiency is improved；The device for absorbing tail gas of setting is fully protected
The zero-emission of nitrogen hydracid is demonstrate,proved.
Claims (4)
1. a kind of sodium azide sewage disposal dedicated system, including storage tank, processing unit and reaction kettle（15）, it is characterised in that：
The storage tank includes acid waste water storage tank（10）, alkaline waste water storage tank（12）, ethanol storage tank（11）, alkaline waste water handle liquid storage tank
（14）, acid waste water filtrate tanks（8）With aqueous sodium hypochlorite solution storage tank（5）, the processing unit includes continuous centrifuge
（9）, destilling tower（13）And leaf filter（1）, the alkaline waste water storage tank（12）Pass through pipeline and destilling tower（13）It is connected, institute
State destilling tower（13）Top and ethanol storage tank（11）It is connected, destilling tower（13）Bottom and alkaline waste water handle liquid storage tank（14）
It is connected, the alkaline waste water handles liquid storage tank（14）Pass through pipeline and reaction kettle（15）It is connected, the acid waste water storage tank（10）
Pass through pipeline and continuous centrifuge（9）It is connected, the continuous centrifuge（9）It is provided with solid-phase outlet and liquid-phase outlet, liquid phase goes out
Mouth passes through pipeline and acid waste water filtrate tanks（8）It is connected, the acid waste water filtrate tanks（8）Bottom by pipeline with react
Kettle（15）It is connected, acid waste water filtrate tanks（8）Side is provided with microsyringe I（7）, the aqueous sodium hypochlorite solution storage tank
（5）Side is provided with microsyringe II（6）, microsyringe I（7）With microsyringe II（6）Respectively with reaction kettle（15）
It is connected, the reaction kettle（15）Bottom passes through pipeline and leaf filter（1）It is connected, the reaction kettle（15）Top passes through pipeline
It is provided with exhaust gas processing device（2）, the exhaust gas processing device（2）Inside it is provided with sodium nitrite and aqueous sodium hypochlorite solution.
2. sodium azide sewage disposal dedicated system according to claim 1, it is characterised in that：The destilling tower（13）If
It is set to three layers.
3. sodium azide sewage disposal dedicated system according to claim 1, it is characterised in that：The acid waste water storage tank
（10）And reaction kettle（15）It is inside both provided with agitating device, the agitating device includes stirring motor, stirring rod and stirring slurry.
4. sodium azide sewage disposal dedicated system according to claim 1, it is characterised in that：The reaction kettle（15）Top
Portion and exhaust gas processing device（2）It is both provided with safety valve（3）, exhaust gas processing device（2）It is provided with exhaust-valve（4）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721743787.6U CN207748980U (en) | 2017-12-14 | 2017-12-14 | A kind of sodium azide sewage disposal dedicated system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721743787.6U CN207748980U (en) | 2017-12-14 | 2017-12-14 | A kind of sodium azide sewage disposal dedicated system |
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| Publication Number | Publication Date |
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| CN207748980U true CN207748980U (en) | 2018-08-21 |
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ID=63148950
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107840519A (en) * | 2017-12-14 | 2018-03-27 | 山东省溯源绿色化工研究院 | The processing method and sewage disposal dedicated system of a kind of sodium azide sewage |
| CN114226420A (en) * | 2021-12-23 | 2022-03-25 | 广州雅居乐固体废物处理有限公司 | Harmless treatment process for sodium azide |
| CN117732095A (en) * | 2024-02-21 | 2024-03-22 | 珙县华洁危险废物治理有限责任公司成都分公司 | Method for treating sodium azide by adopting triple-effect evaporation system |
-
2017
- 2017-12-14 CN CN201721743787.6U patent/CN207748980U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107840519A (en) * | 2017-12-14 | 2018-03-27 | 山东省溯源绿色化工研究院 | The processing method and sewage disposal dedicated system of a kind of sodium azide sewage |
| CN114226420A (en) * | 2021-12-23 | 2022-03-25 | 广州雅居乐固体废物处理有限公司 | Harmless treatment process for sodium azide |
| CN117732095A (en) * | 2024-02-21 | 2024-03-22 | 珙县华洁危险废物治理有限责任公司成都分公司 | Method for treating sodium azide by adopting triple-effect evaporation system |
| CN117732095B (en) * | 2024-02-21 | 2024-05-03 | 珙县华洁危险废物治理有限责任公司成都分公司 | Method for treating sodium azide by adopting triple-effect evaporation system |
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