CN109293114A - A kind for the treatment of process and equipment of glyphosate production wastewater - Google Patents
A kind for the treatment of process and equipment of glyphosate production wastewater Download PDFInfo
- Publication number
- CN109293114A CN109293114A CN201811240167.XA CN201811240167A CN109293114A CN 109293114 A CN109293114 A CN 109293114A CN 201811240167 A CN201811240167 A CN 201811240167A CN 109293114 A CN109293114 A CN 109293114A
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- Prior art keywords
- production wastewater
- heat exchanger
- sodium chloride
- glyphosate production
- gas
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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
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash 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
- C02F2001/007—Processes including a sedimentation step
Abstract
The invention discloses a kind for the treatment of process of glyphosate production wastewater, it includes the glyphosate production wastewater for preheating sodium chloride-containing, it is concentrated by evaporation, concentrate circulation, the step of sodium chloride crystallization recycling sodium salt product, sodium chloride crystal is precipitated from waste water by high-temperature process in the technique, to realize the recycling of sodium chloride in glyphosate production wastewater, the sodium chloride product of technical grade is obtained, reduce the generation of solid waste or dangerous waste, reduce the pollution to environment, glyphosate production wastewater has obtained recycling treatment, it is a kind of energy-saving and emission-reduction, the technique for meeting the strategy of sustainable development, the industry is without the emission for causing river pollution, the technical effect of the resource reclaim of no pollution liquid discharge is reached.The equipment for the technique is also disclosed, the equipment energy consumption is low, and high degree of automation, operating cost is low, meets sustainable development requirement, can be widely applied to during actual industrial production.
Description
Technical field
The invention belongs to industrial waste water treatments, relate in particular to a kind of processing work of glyphosate production wastewater
Skill and equipment.
Background technique
Waste water is the general name of the water being discharged in people's active procedure and runoff rainwater, including sanitary sewage, industrial wastewater
The other useless water of rainwater grade that drainpipe is flowed into diameter, belong to one of three big public hazards of nature.Wherein, industrial wastewater is in work
The waste water and waste liquid that generate in industry production containing the industrial production materials outflowed with water, intermediate product, byproduct and produced
The pollutant generated in journey, with the rapid development of industry, the type and quantity of waste water rapidly increase, to the pollution of water body also day
Become extensive and serious, threaten the health and safety of the mankind, while also containing a large amount of recoverable resources in sewage, if do not returned
Receipts processing, will bring about great losses, therefore sewage is developed and comprehensively utilized, and turning harm into good is particularly important.
Metallurgical Waste Water, chemical waste water main component are substantially inorganic salts, are producing with industrial production equipment not
Disconnected construction, sewage, exhaust gas, waste discharge amount be also continuously increased, however the environmental issue in the whole world is got worse, environmentally friendly power
The continuous increase of degree, so resource recovery process is also constantly being promoted.
Glyphosate is a kind of broad spectrum activity biological weed killer, is generally produced by IDAN technique, there are discharge of wastewater for the technique
The problems such as amount is big, complicated component, high acidity contains a large amount of sodium chloride and a certain amount of organic phosphorus reaction pair in glyphosate production wastewater
Product, the technique that enterprise inside the circle generallys use at present are to have recycled the water of the overwhelming majority and obtained crystal salt mostly, still
While obtained crystal salt, liquid waste processing is not thorough, and still has a large amount of separating liquids to need to discharge, and discharging of waste liquid can still draw
River pollution is played, in addition treatment process energy consumption is high, and these problems annoying enterprise, and have seriously affected the project process of enterprise,
The zero liquid discharge of high-salt wastewater is the inexorable trend that high-salt wastewater is administered.
Summary of the invention
For this purpose, the present invention exactly will solve above-mentioned technical problem, to propose a kind of glyphosate of high efficiente callback sodium chloride
Produce the treatment process and equipment of waste water.
In order to solve the above technical problems, the technical solution of the present invention is as follows:
The present invention provides a kind for the treatment of process of glyphosate production wastewater comprising following steps:
The glyphosate production wastewater of sodium chloride-containing is heated to reaching waste water bubble point by S1, preheating；
S2, evaporation and concentration will carry out gas-liquid separation after the waste water evaporation process after preheating, obtain unsaturated concentrate；
S3, concentrate circulation are concentrated by evaporation the unsaturated concentrate, until sodium chloride reaches hypersaturated state in waste water,
Obtain supersaturated concentrate；
S4, sodium chloride crystallization carry out flash distillation and gas-liquid separating treatment to the supersaturated concentrate, and sodium chloride crystal is from mother
It is precipitated and precipitates in liquid, Isolating chlorinated sodium crystal and analysis salt mother liquor obtain sodium chloride product.
Preferably, further including the steps that analyse the reuse of salt mother liquor after the step S4 to the step S3.
Preferably, preheating described in step S1 are as follows: the glyphosate production wastewater of sodium chloride-containing is sequentially pre- through three-level
Heat is to reaching 94 DEG C.
Preferably, gas phase temperature is 90 DEG C, pressure is in evaporating concentration process described in the step S2
70.1KPa, liquidus temperature rise to 97 DEG C by 90 DEG C.
Preferably, the circulation of concentrate described in the step S3 includes increasing temperature and pressure, flash distillation and gas-liquid separating step,
In flash process, flash temperature is 90 DEG C, pressure 70.1KPa, during gas-liquid separation, and gas phase temperature is 90 DEG C, and pressure is
70.1KPa, liquidus temperature rise to 100 DEG C by 97 DEG C.
The present invention also provides a kind of equipment for the glyphosate production wastewater treatment process, the equipment includes sequentially
The distillation water preheater of connection, fixed gas preheater, vapor preheater, Falling film heat transfer device, gas-liquid separator, forced circulation heat exchange
Device and crystal separator.
Preferably, further including a compressor assembly, the compressor assembly includes compressor and secondary steam gas washing dress
It sets, the Falling film heat transfer device, gas-liquid separator, forced circulation heat exchanger, crystal separator are all connected to the compressor, described
The secondary steam that gas-liquid separator, crystal separator generate is transmitted to Falling film heat transfer device and forced circulation heat exchanger by compressor.
Preferably, the secondary steam gas washing equipment is aeration tower, the scrubbing liquid that the aeration tower uses is temperature
Circulation wash water identical with secondary steam temperature.
Preferably, the distillation water preheater has a plate heat exchanger, the heat exchange liquid that the plate heat exchanger uses
Body is the secondary steam condensate liquid that the forced circulation heat exchanger generates.
Preferably, the Falling film heat transfer device, forced circulation heat exchanger are shell-and-tube heat exchanger, the shell-and-tube heat exchanger
With heat exchanger chamber, the heat exchanger chamber is connected to the fresh steam inlet that oriented heat exchanger chamber is passed through fresh steam.
The above technical solution of the present invention has the following advantages over the prior art:
(1) treatment process of glyphosate production wastewater of the present invention comprising the glyphosate for preheating sodium chloride-containing is raw
The step of producing waste water, evaporation and concentration, concentrate circulation, sodium chloride crystallization recycling sodium salt product, the technique passes through high-temperature process
Sodium chloride crystal is precipitated from waste water, to realize the recycling of sodium chloride in glyphosate production wastewater, has obtained technical grade
Sodium chloride product, reduce the generation of solid waste or dangerous waste, reduce the pollution to environment, glyphosate production wastewater is provided
Sourceization processing is a kind of energy-saving and emission-reduction, the technique for meeting the strategy of sustainable development, and the industry is without the discharge for causing river pollution
Object has reached the technical effect of the resource reclaim of no pollution liquid discharge.
(2) equipment of the present invention for the glyphosate production wastewater treatment process, the equipment include sequentially
The distillation water preheater of connection, fixed gas preheater, vapor preheater, Falling film heat transfer device, gas-liquid separator, forced circulation heat exchange
Device and crystal separator.The equipment uses energy-saving mechanical steam recompression technology, and evaporating energy consumption used in 1 ton of waste water is to pass
Unite the 1/6-1/5 of evaporation equipment, and the equipment thermal efficiency is high, low in energy consumption, it is only necessary to be heated, be reduced pair using less amount of fresh steam
The dependence of boiler plant, reduces pollutant, and no pollution to the environment is more energy-saving and environmentally friendly.The device structure is simple, is easy to real
Existing, high degree of automation, operating cost is low, meets sustainable development requirement, can be widely applied to during actual industrial production.
Detailed description of the invention
In order to make the content of the present invention more clearly understood, it below according to specific embodiments of the present invention and combines
Attached drawing, the present invention is described in further detail, wherein
Fig. 1 is the schematic diagram that glyphosate production wastewater Processing Equipment is used for described in the embodiment of the present invention；
Appended drawing reference indicates in figure are as follows: 1- distills water preheater；2- fixed gas preheater；The fresh vapor preheater of 3-；4- drop
Film heat exchanger；5- gas-liquid separator；6- compressor；7- the first falling liquid film circulating pump；8- the second falling liquid film circulating pump；9- transfering material pump；10-
Forced circulation heat exchanger；11- crystal separator；12- forced circulation pump；13- discharging pump；14- thickener；15- centrifuge；16-
Mother liquor tank；17- mother liquor reflux pump；18- original fluid container；19- raw material pump；20- secondary steam air-washer；21- wash water circulating pump；
22- cooler；23- distills water pot；24- distilled water pump；25- hydrops pump；26- hydrops tank；27- vacuum pump.
Specific embodiment
The present invention can be implemented with many different forms, should not be construed as limited to embodiment set forth herein, on the contrary,
These embodiments are provided, so that the disclosure is thorough and complete, and will fully convey the concept of the invention to art technology
Personnel, the present invention will be defined by the claims.In the accompanying drawings, for clarity, the size of each device and opposite can be exaggerated
Size.Description of the invention and term " first " in claims and attached drawing, " second " etc. are for distinguishing similar right
As without being used to describe a particular order or precedence order.It should be understood that the data used in this way in the appropriate case can be with
It exchanges.In addition, term " includes ", " having " and their any deformation, it is intended that cover and non-exclusive include.
Embodiment
This implementation provides a kind for the treatment of process of glyphosate production wastewater comprising following steps:
The glyphosate production wastewater of sodium chloride-containing is heated to waste water bubble point, the glyphosate production wastewater by S1, preheating
In, the mass fraction of sodium chloride is 11.00%, flow 42.0t/h, and the waste water is successively by distilling water preheater 1, not coagulating
Air preheater 2, fresh vapor preheater 3 are preheated to 94 DEG C, and the pressure of fresh steam is 1985mbar in the fresh vapor preheater 3,
Temperature is 120 DEG C.
The waste water for being preheated to 94 DEG C is transferred in Falling film heat transfer device 4 evaporation and concentration of being heated, is concentrated by evaporation by S2, evaporation and concentration
In the process, gas phase temperature be 90 DEG C, pressure 70.1KPa, liquidus temperature rises to 97 DEG C by 90 DEG C, obtains sodium chloride and be in not satisfy
With the unsaturated concentrate of state, the unsaturation concentrate carries out gas-liquid separation, the gas-liquid separation in gas-liquid separator 5
Compressor 6 is connected at the top of device 5, the gas after gas-liquid separation enters compressor 6, and liquid phase drops back into the lower tube box of Falling film heat transfer device 4,
Circulating and evaporating in Falling film heat transfer device 4 is squeezed into again by the first falling liquid film circulating pump 7, the second falling liquid film circulating pump 8 to be concentrated.
S3, concentrate circulation, the unsaturated concentrate that evaporation-concentration step S2 is obtained, until sodium chloride in unsaturated concentrate
Reach hypersaturated state, obtain supersaturated concentrate, specifically, the unsaturation concentrate squeezes into forced circulation through transfering material pump 9
Increasing temperature and pressure in heat exchanger 10, then carries out flash distillation and gas-liquid separation in crystal separator 11, and the crystal separator 11 pushes up
Portion is also connected to compressor 6, opens compressor 6 and is evaporated concentration, is concentrated by evaporation in gas-liquid separation process, gas is by crystallizing
Separator 11 enters compressor 6, and liquid phase drops back into 11 bottom of crystal separator, is driven into pressure under the action of forced circulation pump 12
It is concentrated by evaporation again in circulation heat exchanger 10, until reaching sodium chloride concentration in waste water is hypersaturated state, obtains supersaturated mother
Liquid.In flash process, flash temperature is 90 DEG C, pressure 70.1KPa, during gas-liquid separation, pressure 70.1KPa, liquid
Phase temperature rises to 100 DEG C by 97 DEG C.
S4, sodium chloride crystallization, the supersaturated mother liquor that step S3 is obtained, which is delivered to again in crystal separator 11, to be dodged
It steams and gas-liquid separating treatment, supersaturated mother liquor loses partial moisture after flash distillation, fine grain is precipitated, fine grain is in crystal separator 11
Hypocentrum in grow up, be then transferred into thickener 14 and thickened under the action of discharging pump 13, then use centrifuge 15
Up to sodium chloride crystal product and saturation analysis salt mother liquor after separation of solid and liquid.
S5, saturation analysis salt Recycling Mother Solution, the saturation analysis salt mother liquor are stored in mother liquor tank 16, are using pressure
After 1985mbar, the fresh steam that temperature is 120 DEG C are directly preheated to 100 DEG C, crystal separator 11 is squeezed into through mother liquor reflux pump 17
Middle continuation evaporating, concentrating and crystallizing, sufficiently extraction sodium chloride crystal, improve the rate of recovery of sodium chloride.
This implementation also provides a kind of equipment for above-mentioned technique, and the equipment is as shown in Figure 1 comprising sequentially connected
Distill water preheater 1, fixed gas preheater 2, fresh vapor preheater 3, the distillation water preheater 1 be connected with one be used for store to
The original fluid container 18 for handling waste water, the waste water for being stored in original fluid container 18 successively pass through distillation water preheater under the action of raw material pump 19
1, fixed gas preheater 2, the heating of 3 three-level of fresh vapor preheater, reach waste water bubble point.The fresh vapor preheater 3 also sequentially connects
It is connected to Falling film heat transfer device 4, gas-liquid separator 5, forced circulation heat exchanger 10 and crystal separator 11.Wherein distill water preheater 1
With a plate heat exchanger, the heat exchanging liquid that the plate heat exchanger uses is the secondary of the forced circulation heat exchanger 10 generation
Steam condensate.The Falling film heat transfer device 4, forced circulation heat exchanger 10 are shell-and-tube heat exchanger, the pipe shell type heat exchange utensil
There is heat exchanger chamber, the heat exchanger chamber is connected to the fresh steam inlet that oriented heat exchanger chamber is passed through fresh steam.
It further include a compressor assembly, the compressor assembly includes compressor 6 and secondary steam air-washer 20, described
Falling film heat transfer device 4, gas-liquid separator 5, forced circulation heat exchanger 10 and crystal separator 11 are all connected to the compressor 6, institute
Compressor 6 is stated for the secondary steam that gas-liquid separator 5, crystal separator 11 generate to be transmitted to Falling film heat transfer device 4 and is forced
Circulation heat exchanger 10.The secondary steam air-washer 20 is aeration tower, and the scrubbing liquid used is temperature and secondary steam
Identical circulation wash water, the gas washing tower bottom are connected with a wash water circulating pump 21.
As shown, the fixed gas preheater 2 is also connected with a cooler 22, the distillation water preheater 1 passes through pipe
Road is connected with a distillation water pot 23, and the distillation water pot 23 is connected with distilled water pump 24, and the distillation water pot 23 is also attached to institute
Fresh vapor preheater 3, Falling film heat transfer device 4 are stated, the distillation water pot 23 is connected to a hydrops tank 26, the product by hydrops pump 25
For flow container 26 by piping connection in the compressor 6 and secondary steam aeration tower, the cooler 22 is connected with a vacuum pump 27.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind for the treatment of process of glyphosate production wastewater, which comprises the steps of:
The glyphosate production wastewater of sodium chloride-containing is heated to reaching waste water bubble point by S1, preheating；
S2, evaporation and concentration will carry out gas-liquid separation after the waste water evaporation process after preheating, obtain unsaturated concentrate；
S3, concentrate circulation are concentrated by evaporation the unsaturated concentrate and obtain until sodium chloride reaches hypersaturated state in waste water
Supersaturated concentrate；
S4, sodium chloride crystallization carry out flash distillation and gas-liquid separating treatment to the supersaturated concentrate, and sodium chloride crystal is from mother liquor
It is precipitated and precipitates, Isolating chlorinated sodium crystal and analysis salt mother liquor obtain sodium chloride product.
2. the treatment process of glyphosate production wastewater according to claim 1, which is characterized in that also wrapped after the step S4
Include will analysis salt mother liquor reuse to the step S3 the step of.
3. the treatment process of glyphosate production wastewater according to claim 2, which is characterized in that pre- described in step S1
Heat are as follows: the glyphosate production wastewater of sodium chloride-containing is sequentially preheated to through three-level and reaches 94 DEG C.
4. the treatment process of glyphosate production wastewater according to claim 3, which is characterized in that described in the step S2
Evaporating concentration process in, gas phase temperature is 90 DEG C, pressure 70.1KPa, and liquidus temperature rises to 97 DEG C by 90 DEG C.
5. the treatment process of glyphosate production wastewater according to claim 4, which is characterized in that described in the step S3
Concentrate circulation include increasing temperature and pressure, flash distillation and gas-liquid separating step, in flash process, flash temperature is 90 DEG C, and pressure is
70.1KPa, during gas-liquid separation, gas phase temperature is 90 DEG C, and pressure 70.1KPa, liquidus temperature rises to 100 DEG C by 97 DEG C.
6. a kind of equipment for the glyphosate production wastewater treatment process as described in claim any one of 1-5, which is characterized in that
The equipment includes sequentially connected distillation water preheater, fixed gas preheater, vapor preheater, Falling film heat transfer device, gas-liquid point
From device, forced circulation heat exchanger and crystal separator.
7. the equipment according to claim 6 for glyphosate production wastewater treatment process, which is characterized in that further include one
Compressor assembly, the compressor assembly include compressor and secondary steam air-washer, the Falling film heat transfer device, gas-liquid separation
Device, forced circulation heat exchanger, crystal separator are all connected to the compressor, and the compressor divides gas-liquid separator, crystallization
The secondary steam generated from device is transmitted to Falling film heat transfer device and forced circulation heat exchanger.
8. the equipment according to claim 7 for glyphosate production wastewater treatment process, which is characterized in that described secondary
Steam gas washing equipment is aeration tower, and the scrubbing liquid that the aeration tower uses is washed for temperature circulation identical with secondary steam temperature
Water.
9. the equipment according to claim 8 for glyphosate production wastewater treatment process, which is characterized in that the distillation
Water preheater has a plate heat exchanger, and the heat exchanging liquid that the plate heat exchanger uses is forced circulation heat exchanger generation
Secondary steam condensate liquid.
10. the equipment according to claim 9 for glyphosate production wastewater treatment process, which is characterized in that the drop
Film heat exchanger, forced circulation heat exchanger are shell-and-tube heat exchanger, and the shell-and-tube heat exchanger has heat exchanger chamber, the heat exchanging chamber
Body is connected to the fresh steam inlet that oriented heat exchanger chamber is passed through fresh steam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811240167.XA CN109293114A (en) | 2018-10-23 | 2018-10-23 | A kind for the treatment of process and equipment of glyphosate production wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811240167.XA CN109293114A (en) | 2018-10-23 | 2018-10-23 | A kind for the treatment of process and equipment of glyphosate production wastewater |
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| CN109293114A true CN109293114A (en) | 2019-02-01 |
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| CN201811240167.XA Pending CN109293114A (en) | 2018-10-23 | 2018-10-23 | A kind for the treatment of process and equipment of glyphosate production wastewater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109850969A (en) * | 2019-03-08 | 2019-06-07 | 江苏瑞升华能源科技有限公司 | The system for concentrating and recycling of calcium chloride solution |
| CN110282676A (en) * | 2019-07-22 | 2019-09-27 | 深圳市瑞升华科技股份有限公司 | Hydrazine hydrate waste water evaporation crystallization equipment and its evaporative crystallization technique |
| CN114804476A (en) * | 2022-03-28 | 2022-07-29 | 武汉天源环保股份有限公司 | Landfill leachate treatment system and treatment method |
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| US20140142005A1 (en) * | 2012-11-20 | 2014-05-22 | Utah State University | Potash processing with a vapor-compression cycle |
| CN105174290A (en) * | 2015-05-18 | 2015-12-23 | 深圳市瑞升华科技股份有限公司 | Separation process of potassium salt and sodium salt in concentrated brine |
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