CN107500463A - A kind of paraquat wastewater treatment and resource utilization process - Google Patents
A kind of paraquat wastewater treatment and resource utilization process Download PDFInfo
- Publication number
- CN107500463A CN107500463A CN201710883069.7A CN201710883069A CN107500463A CN 107500463 A CN107500463 A CN 107500463A CN 201710883069 A CN201710883069 A CN 201710883069A CN 107500463 A CN107500463 A CN 107500463A
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- Prior art keywords
- waste water
- paraquat
- ammonia
- wastewater treatment
- water
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The invention provides a kind of paraquat wastewater treatment and resource utilization process, it comprises the following steps：(1) water reuse formaldehyde of the paraquat waste water after stripping reclaims ammonia is subjected to broken cyanide processing with liquid caustic soda, the cyanogen root in waste water is removed completely；(2) sulphur acid for adjusting pH value is added dropwise into the waste water after broken cyanide processing to neutrality, and utilizes multi-effect evaporator by Waste water concentrating；Then the methanol in indirect steam condensed water caused by multiple-effect evaporation technique, formaldehyde are reclaimed using hypergravity bed, and by membrane technology by steam condensate (SC) more than 99% ammonia nitrogen removal, the reclamation of condensate water after processing is applied in paraquat production；The present invention will carry out recycling using multiple-effect evaporation technology after the ammonium salt concentration in waste water, the high ammonia nitrogen in waste water is handled using ammonia nitrogen waste water membrane treatment process simultaneously, and caused ammonium salt is subjected to recycling, and caused waste water can be made to reach no pollution discharge.
Description
Technical field
The present invention relates to field of waste water treatment, and in particular to a kind of paraquat wastewater treatment and resource utilization process.
Background technology
Paraquat is that one kind is gone out natural disposition contact killing type cauline leaf process herbicide, there is very strong destructive power to chloroplaset tunic, right
Crop seed fanout free region in plant root and soil.Paraquat is second largest herbicide kind on international market, the annual whole world
Sales volume is more than 1,000,000,000 dollars.At home, paraquat yield is less than the huge second of glyphosate, but is first to remove greatly by dosage
Careless agent kind.
Paraquat production is mainly cyanide catalysis method, and wastewater discharge is big, cyanide content height, complicated component, is difficult to
Biochemical treatment, it is known that pesticides waste water treatment process during disposal of pollutants it is serious, and the recovery utilization rate of resource is relatively low, to ring
The pollution in border is larger, and causes certain wasting of resources.In paraquat wastewater treatment process, the recovery to ammonium salt can use
Cooling reactor crystallization body is transferred to after the concentration of multi-effect evaporator method, then through centrifuging, separating, collecting and can obtain, but produce in the process
A large amount of steam condensate (SC)s in ammonia nitrogen and methanol containing higher concentration, directly discharge after larger pollution is caused to environment, together
When be unfavorable for the recycling of pollutant.Therefore, develop for the new technology of the useless improvement of paraquat and recycling
As the task of top priority of pesticide industry.
The content of the invention
In order to solve the waste water of paraquat production, waste water caused by realization reaches no pollution discharge, while realizes pollutant
Recycling, the present invention will carry out recycling using multiple-effect evaporation technology after the ammonium salt concentration in waste water, while sharp
The high ammonia nitrogen in waste water is handled with ammonia nitrogen waste water membrane treatment process, and caused ammonium salt is subjected to recycling.
To realize object above, the present invention is achieved by the following technical programs：
A kind of paraquat wastewater treatment and resource utilization process, comprise the following steps：
(1) water reuse formaldehyde of the paraquat waste water after stripping reclaims ammonia is subjected to broken cyanide processing with liquid caustic soda, by waste water
In cyanogen root remove completely；
(2) sulphur acid for adjusting pH value is added dropwise into the waste water after broken cyanide processing to neutrality, and utilizes multi-effect evaporator by waste water
Concentration；Then the methanol in indirect steam condensed water caused by multiple-effect evaporation technique, formaldehyde are reclaimed using hypergravity bed,
And in steam condensate (SC) more than 99% ammonia nitrogen removal is applied mechanically the reclamation of condensate water after processing by membrane technology
In being produced to paraquat.
Preferably, it is mother liquid obtained after multi-effect evaporator concentration to be transferred to cooling reactor crystallization body in the step (2), then adopt
It is centrifuged with centrifuge, obtained ammonium sulfate is subjected to rational recycling；Preferably, institute after centrifugation
The waste liquid obtained, which is returned in multi-effect evaporator, to be continued to handle.
Preferably, in the step (2), water evaporation quantity of the waste water in multi-effect evaporator is 75-85%.
Preferably, in the step (2), when carrying out ammonia nitrogen removal using membrane technology, first using liquid caustic soda by steam
The pH value of condensed water is adjusted to 11, then removes ammonia nitrogen therein, and caused ammonia is absorbed using 50% sulfuric acid, to producing
To pure ammonium sulfate reclaimed after utilize.
Preferably, in the step (1), during stripping, after the ammonia in waste water is extracted, pressed using ammonia compressor
Recycled after contracting, the ammonia content in waste water is reduced to below 20000ppm, recycle formaldehyde to carry out broken cyanide with liquid caustic soda
Processing.
In the present invention, formaldehyde, liquid caustic soda, sulfuric acid can be conventional solubility；Preferably, formaldehyde is 37% in the present invention
Formaldehyde, liquid caustic soda is 30% liquid caustic soda, and sulfuric acid is 93% concentrated sulfuric acid.
The beneficial effects of the invention are as follows：
1st, the present invention uses to enter the methanol in steam condensate (SC) caused by multiple-effect evaporation technique, formaldehyde using hypergravity bed
Row rectifying is reclaimed, and on the one hand makes the standard for further reaching recycling in steam condensate (SC) almost without methanol, residues of formaldehyde,
Methanol, the formaldehyde of another aspect rectifying recovery can carry out recycling.And ammonia nitrogen waste water membrane treatment process is utilized by waste water
In high ammonia nitrogen handled, can by caused ammonium salt carry out recycling.
2nd, multiple-effect evaporation technology is utilized to be obtained after the concentration in waste water through crystallization, centrifugation, separation, collection in the present invention
Ammonium salt carry out recycling,
3rd, the present invention makes waste water caused by production completely be administered, and reaches recycling for resource, while ensures useless
The zero-emission of pollution during water harnessing, reach the effect of environmental protection.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is present invention process flow chart.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention,
Technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is the present invention one
Divide embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, belongs to the scope of protection of the invention.
Fig. 1 is the process chart of the present invention, and specific embodiment is as follows：
Embodiment 1：
A kind of paraquat wastewater treatment and resource utilization process, comprise the following steps：
(1) paraquat waste water is stripped, after the ammonia in waste water is extracted, after being compressed using ammonia compressor
Recycled, the ammonia content in waste water is reduced to below 20000ppm；Again by the water reuse after stripping reclaims ammonia
37% formaldehyde and 30% liquid caustic soda carry out broken cyanide processing, and the cyanogen root in waste water is removed completely；
(2) 93% concentrated sulfuric acid is added dropwise into the waste water after broken cyanide processing and adjusts pH value to neutrality, and utilize multi-effect evaporator
It is dense by concentration is carried out after the moisture evaporation of waste water 75%, it is mother liquid obtained after concentration to be transferred to cooling reactor crystallization body, then use
Centrifuge is centrifuged, and obtained ammonium sulfate is reasonably recycled, and the waste liquid of gained is sent after centrifugation
It is back in multi-effect evaporator and continues to handle.
Then using hypergravity bed, to the methanol in steam condensate (SC) caused by multiple-effect evaporation technique, formaldehyde, (formaldehyde is at this
Content is 4% or so in steam condensate (SC)) reclaimed, and by membrane technology by steam condensate (SC) more than 99% ammonia
Nitrogen is removed, and the reclamation of condensate water after processing is applied in paraquat production, waste water is reached the effect of zero-emission.Adopting
When carrying out ammonia nitrogen removal with membrane technology, first the pH value of steam condensate (SC) is adjusted to 11 using 30% liquid caustic soda, then remove it
In ammonia nitrogen, caused ammonia absorbed using 50% sulfuric acid, and the pure ammonium sulfate for producing to obtain utilizes after being reclaimed,
Ensure that waste liquid does not discharge externally.
Embodiment 2：
A kind of paraquat wastewater treatment and resource utilization process, comprise the following steps：
(1) paraquat waste water is stripped, after the ammonia in waste water is extracted, after being compressed using ammonia compressor
Recycled, the ammonia content in waste water is reduced to below 20000ppm；Again by the water reuse after stripping reclaims ammonia
37% formaldehyde and 40% liquid caustic soda carry out broken cyanide processing, and the cyanogen root in waste water is removed completely；
(2) 50% sulphur acid for adjusting pH value is added dropwise into the waste water after broken cyanide processing to neutrality, and will using multi-effect evaporator
It is dense that concentration is carried out after the moisture evaporation of waste water 80%, it is mother liquid obtained after concentration to be transferred to cooling reactor crystallization body, then using from
Scheming is centrifuged, and obtained ammonium sulfate is reasonably recycled, and the waste liquid of gained is sent back to after centrifugation
Continue to handle into multi-effect evaporator.
Then using hypergravity bed, to the methanol in steam condensate (SC) caused by multiple-effect evaporation technique, formaldehyde, (formaldehyde is at this
Content is 4% or so in steam condensate (SC)) rectifying recovery is carried out, and by membrane technology by 99% in indirect steam condensed water
Ammonia nitrogen removal above, the reclamation of condensate water after processing is applied in paraquat production, waste water is reached zero-emission
Effect.When carrying out ammonia nitrogen removal using membrane technology, first the pH value of steam condensate (SC) is adjusted to 11 using 40% liquid caustic soda,
Ammonia nitrogen therein is removed again, and caused ammonia is absorbed using 50% sulfuric acid, and the pure ammonium sulfate for producing to obtain is returned
Utilized after receipts, ensure that waste liquid does not discharge externally.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a kind of paraquat wastewater treatment and resource utilization process, it is characterised in that comprise the following steps：
(1) water reuse formaldehyde of the paraquat waste water after stripping reclaims ammonia is subjected to broken cyanide processing with liquid caustic soda, by waste water
Cyanogen root removes completely；
(2) sulphur acid for adjusting pH value is added dropwise into the waste water after broken cyanide processing to neutrality, and utilizes multi-effect evaporator by Waste water concentrating；
Then the methanol in indirect steam condensed water caused by multiple-effect evaporation technique, formaldehyde are reclaimed using hypergravity bed, and led to
Reclamation of condensate water after processing is applied to hundred by steam condensate (SC) more than 99% ammonia nitrogen removal by film process technology
In the withered production of grass.
2. paraquat wastewater treatment according to claim 1 and resource utilization process, it is characterised in that the step
(2) it is mother liquid obtained after multi-effect evaporator concentration to be transferred to cooling reactor crystallization body in, then be centrifuged using centrifuge, will
Obtained ammonium sulfate carries out rational recycling.
3. paraquat wastewater treatment according to claim 2 and resource utilization process, it is characterised in that after centrifugation
The waste liquid of gained, which is returned in multi-effect evaporator, to be continued to handle.
4. paraquat wastewater treatment according to claim 1 and resource utilization process, it is characterised in that the step
(2) in, water evaporation quantity of the waste water in multi-effect evaporator is 75-85%.
5. paraquat wastewater treatment according to claim 1 and resource utilization process, it is characterised in that the step
(2) in, when carrying out ammonia nitrogen removal using membrane technology, first the pH value of steam condensate (SC) is adjusted to 11 using liquid caustic soda, then
Ammonia nitrogen therein is removed, caused ammonia is absorbed using 50% sulfuric acid, and the pure ammonium sulfate obtained to production returns
Utilized after receipts.
6. paraquat wastewater treatment according to claim 1 and resource utilization process, it is characterised in that the step
(1) in, during stripping, after the ammonia in waste water is extracted, recycled after being compressed using ammonia compressor, make waste water
In ammonia content be reduced to below 20000ppm, recycle formaldehyde to carry out broken cyanide processing with liquid caustic soda.
7. paraquat wastewater treatment and resource utilization process according to claim any one of 1-6, it is characterised in that institute
It is 37% formaldehyde to state formaldehyde, and liquid caustic soda is 30% liquid caustic soda, and sulfuric acid is 93% concentrated sulfuric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710883069.7A CN107500463A (en) | 2017-09-26 | 2017-09-26 | A kind of paraquat wastewater treatment and resource utilization process |
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| CN201710883069.7A CN107500463A (en) | 2017-09-26 | 2017-09-26 | A kind of paraquat wastewater treatment and resource utilization process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109534570A (en) * | 2018-11-26 | 2019-03-29 | 启东亚太化工厂有限公司 | A kind for the treatment of process of high concentration production waste water |
| CN109796101A (en) * | 2019-02-25 | 2019-05-24 | 安徽国星生物化学有限公司 | A kind of paraquat waste water high-efficiency, resource utilization treatment process technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109534570A (en) * | 2018-11-26 | 2019-03-29 | 启东亚太化工厂有限公司 | A kind for the treatment of process of high concentration production waste water |
| CN109534570B (en) * | 2018-11-26 | 2021-12-14 | 启东亚太药业有限公司 | Treatment process of high-concentration production wastewater |
| CN109796101A (en) * | 2019-02-25 | 2019-05-24 | 安徽国星生物化学有限公司 | A kind of paraquat waste water high-efficiency, resource utilization treatment process technology |
| CN109796101B (en) * | 2019-02-25 | 2022-02-22 | 安徽国星生物化学有限公司 | Highly-efficient and resource-utilization treatment process for paraquat wastewater |
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