CN103303988B - Treatment method of saline-alkali soil reformation wastewater - Google Patents
Treatment method of saline-alkali soil reformation wastewater Download PDFInfo
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- CN103303988B CN103303988B CN201310277572.XA CN201310277572A CN103303988B CN 103303988 B CN103303988 B CN 103303988B CN 201310277572 A CN201310277572 A CN 201310277572A CN 103303988 B CN103303988 B CN 103303988B
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Abstract
The invention relates to the field of sewage treatment, and in particular relates to a treatment method of saline-alkali soil reformation wastewater. The treatment method comprises the following steps of: from June to October, gathering wastewater generated from saline-alkali soil reformation in a reservoir; from December to February of next year, when the wastewater in the reservoir generates surface ice and subglacial water containing salt at outdoor temperature, transferring the subglacial water to an evaporation tank to generate a first ice layer and first subglacial salty water; from April to June of the next year, promoting natural evaporation of the first subglacial salty water to obtain salt and salty water; meanwhile, recharging water generated from melting the surface ice in the reservoir and the first ice layer in the evaporation tank to farmland. The treatment method of the saline-alkali soil reformation wastewater can be used for solving the problem of related technologies which directly discharge wastewater to river or waste land without any treatment to result in secondary pollution.
Description
Technical field
The present invention relates to sewage treatment area, in particular to a kind for the treatment of process of saline-alkali soil reformation wastewater.
Background technology
In Northeast Area of China, there is a large amount of saltingss, because a large amount of salt and alkali components is contained in saltings, therefore, generally, in order to ensure good income, just need normal crop-planting to be carried out by after alkaline land improvement.At present, common alkaline land improvement mainly comprises the method for " to wash alkali ", " with hydraulic pressure alkali ", by above method in the process of alkaline land improvement, can produce a large amount of waste water containing sodium carbonate, sodium sulfate and greening sodium.
But in the related, the waste water major part of above-mentioned generation has not all just been discharged into rivers through any process or on the soil that falls into disuse, has therefore caused secondary pollution.
Summary of the invention
The object of the present invention is to provide a kind for the treatment of process of saline-alkali soil reformation wastewater, to solve the above problems.
Provide a kind for the treatment of process of saline-alkali soil reformation wastewater in embodiments of the invention, comprise the following steps:
In June-October, by the Waste Water Centralized that produces after alkaline land improvement in water reservoir;
In February in December-Second Year, the subglacial water that the waste water in water reservoir produces surperficial ice cube and contains salt under external temperature, is transferred to subglacial water in evaporation tank and generates the first ice sheet and the first subglacial salt solution;
In Second Year April-June, make the first subglacial salt solution carry out spontaneous evaporation, obtain salt and salt solution; The Water Spreading farmland of the generation after simultaneously the surperficial ice cube in water reservoir and the first ice sheet in evaporation tank being dissolved.
The treatment process of this saline-alkali soil reformation wastewater that the embodiment of the present invention provides, in June to October, after the Waste Water Centralized that produces in alkaline land improvement process is in water reservoir, in February in December-Second Year, waste water in water reservoir is under external temperature (being generally-20 DEG C--30 DEG C), can produce from the downward icing phenomenon gradually of wastewater surface, magnetism between the positive and negative charge that the solidifying of water molecules destroys between salt, water molecules, molecules of salt is shifted in the water do not freezed, thus can obtain discharging the surperficial ice cube of molecules of salt and have accumulated the subglacial water of a large amount of salinity; Subglacial water is transferred in evaporation tank and generates the first ice sheet and the first subglacial salt solution; In Second Year April-June, the first subglacial salt solution containing a large amount of salinity evaporates a large amount of moisture by dry monsoon climate in evaporation tank, and can obtain salt and salt solution, salt can directly obtain and be applied to deep processing.Just the waste water in alkaline land improvement process can be processed by above step, reclaim a large amount of salinities contained by it, and the Water Spreading farmland of will reclaim, recycling, and then solve in correlation technique waste water has not just been discharged into rivers through any process or the soil that falls into disuse has caused the problem of secondary pollution.
In addition, the treatment process of the transformation waste water in this saltings of the present invention, generally speaking, if crossed in Second Year April-June, when rainfall amount is not very large, the cycle of wastewater treatment only needs to realize for 1 year, instant effect.
Accompanying drawing explanation
Fig. 1 shows the schema of the treatment process of a kind of saline-alkali soil reformation wastewater of the embodiment of the present invention 1.
Embodiment
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
Please refer to Fig. 1, the treatment process method of the saline-alkali soil reformation wastewater that the embodiment of the present invention one provides, comprising:
Step 101: in June-October, by the Waste Water Centralized that produces after alkaline land improvement in water reservoir;
Step 102: in February in December-Second Year, the subglacial water that the waste water in water reservoir produces surperficial ice cube and contains salt under external temperature, is transferred to subglacial water in evaporation tank and generates the first ice sheet and the first subglacial salt solution;
Step 103: in Second Year April-June, make the first subglacial salt solution carry out spontaneous evaporation, obtain salt and salt solution; The Water Spreading farmland of the generation after simultaneously the surperficial ice cube in water reservoir and the first ice sheet in evaporation tank being dissolved;
The treatment process of this saline-alkali soil reformation wastewater that the embodiment of the present invention provides, in June to October, after the Waste Water Centralized that produces in alkaline land improvement process is in water reservoir, in February in December-Second Year, waste water in water reservoir is under external temperature (being generally-20 DEG C--30 DEG C), can produce from the downward icing phenomenon gradually of wastewater surface, magnetism between the positive and negative charge that the solidifying of water molecules destroys between salt, water molecules, molecules of salt is shifted in the water do not freezed, thus can obtain discharging the surperficial ice cube of molecules of salt and have accumulated the subglacial water of a large amount of salinity; Subglacial water is transferred in evaporation tank and generates the first ice sheet and the first subglacial salt solution; In Second Year April-June, the first subglacial salt solution containing a large amount of salinity evaporates a large amount of moisture by dry monsoon climate in evaporation tank, and can obtain salt and salt solution, salt can directly obtain and be applied to deep processing.Just the waste water in alkaline land improvement process can be processed by above step, reclaim a large amount of salinities contained by it, and the Water Spreading farmland of will reclaim, recycling, and then solve in correlation technique waste water has not just been discharged into rivers through any process or the soil that falls into disuse has caused the problem of secondary pollution.
In order to the treatment process of a kind of saline-alkali soil reformation wastewater making the embodiment of the present invention one is better applied, more effectively be applied in the process field of saline-alkali soil reformation wastewater, the present invention also provides embodiment two on the basis of above-described embodiment one, embodiment two is the further restriction and increase made the concrete steps of embodiment one, is now described in detail and explains:
Embodiment two
Step: 201: form water reservoir, evaporation tank on the ground;
Concrete, in step 201; Form water reservoir and evaporation tank on the ground in advance, preferably, consider the process of the salt solution transport between each pond follow-up, the distance between each pond should not be too large, and the degree of depth of water reservoir is 1-2 rice, preferably, is 1.5-1.7 rice; In addition, when excavation water reservoir and evaporation tank, consider needed for subsequent operations, can the soil that the capping salt basicity in digging process is larger and the minimum soil of bottom saline and alkaline stack separately, and for follow-up landfill process.
Step 202: in June-October, by the Waste Water Centralized that produces after alkaline land improvement in water reservoir;
In step 202., in the season (June-October) that temperature is higher, in advance by the Waste Water Centralized after pending alkaline land improvement in preformed water reservoir, treat winter arrive after, the process of freezing process can be carried out.
Step 203: in February in December-Second Year, the subglacial water that the waste water in water reservoir produces surperficial ice cube and contains salt under external temperature, is transferred to subglacial water in evaporation tank and generates the first ice sheet and the first subglacial salt solution;
In above-mentioned steps 203, concrete, consider in freezing process, the surperficial ice cube of comparatively large vol can be produced, generally speaking, the volume of surperficial ice cube is 2/3 of wastewater volume, so, preferably, waste water accounts for the 1/3-1 of water reservoir volume doubly, can ensure that the ice melting water reservoir afterwards in surface also can be held completely like this, in addition, subglacial water is transferred in the process of evaporation tank, preferably by water pump, subglacial water can be transferred in evaporation tank.
Step 204: in Second Year April-June, make the first subglacial salt solution carry out spontaneous evaporation, obtain salt and salt solution; The Water Spreading farmland of the generation after simultaneously the surperficial ice cube in water reservoir and the first ice sheet in evaporation tank being dissolved.
In step 204, with regard to practical situation, water reservoir floor space is large, hold the water yield many, therefore, in Second Year 4-6 month, after its surperficial ice cube thaws, in order to make full use of water reservoir, preferably, raw fish then can be cultivated in water reservoir, such as: loach, grass carp, crucian or carp, and then improving by-product value, the water after cultured fishes contains a large amount of organic matter that fish produce, and can better be applied in field irrigation.
Certainly, in Second Year April-June, if when running into rainy season, in evaporation tank, a large amount of water will be accumulated, and then by the first subglacial salt solution dilution in evaporation tank, therefore, the mode of being evaporated brine by spontaneous evaporation just may can not reach the object of getting salt, and after obtaining salt, it may remain more salt solution, therefore, salt solution is carried out processing and being soared by evaporation tank by following operation with regard to needs.
Step 205: in Second Year November-December, make the salt solution in evaporation tank generate the second ice sheet and the second subglacial salt solution under external temperature.
In step 205, the salt solution in evaporation tank when temperature is lower, on the one hand, it defines the second ice sheet on top layer, on the other hand, also has the second subglacial salt solution below the second ice sheet, in order to realize processing the second subglacial salt solution completely, be achieved by step 206.
Step 206: the second subglacial salt solution is transferred to shine in salt pond and evaporates brine;
In step 206, being transferred to from evaporation tank the second subglacial salt solution shone salt pond can directly evaporate brine, and shines the salt after getting directly by deep processing, is applied in industrial raw material after being separated sodium carbonate, sodium sulfate, sodium-chlor.
Step 207: the Water Spreading farmland after the second ice sheet is dissolved;
Concrete, namely the second ice sheet in evaporation tank can melt when the coming year rejuvenates or time temperature is higher, also be may be used for recharging farmland by the water after dissolving, and realizes the object of recycling.
When being rainy season owing to having spring then, have in evaporation tank and remain a large amount of undersaturated salt solution, so in Second Year November-December, make the salt solution in evaporation tank under external temperature, generate the second ice sheet and the second subglacial salt solution, then the second subglacial salt solution be transferred to shine in salt pond and evaporate brine, due to the first ice sheet in ice cube surperficial in water reservoir and evaporation tank and the second ice sheet thaw after water, its saltiness is little, so, directly can recharge farmland, and then be reused.
Concrete, between step 206 to step 207, also comprise: in solarization salt pond, (fish food can be can be used as by artemia culture, especially fancy fishes), shine after in salt pond due to the second subglacial salt solution is transferred to, the salt solution shone in salt pond has very high salinity, be therefore applicable to very much the growth of halogen worm, and halogen worm can as the feed of fancy fishes.
Step 208: water reservoir, evaporation tank and solarization salt pond are filled and led up, and for Planting Crops.
After all wastewater treatment process complete and after being applied to and recharging farmland, optionally, water reservoir, evaporation tank and solarization salt pond can be filled and led up, and for Planting Crops, and then again water reservoir, evaporation tank and solarization salt pond are utilized after wastewater treatment, concrete, in the process filled and led up, can by excavate water reservoir, evaporation tank and solarization salt pond time capping salt basicity larger soil bury bottom to three ponds, and the minimum native landfill of bottom saline and alkaline is on the top layer in three ponds; Like this, the soil on top layer, three ponds can be directly used in Planting Crops.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a treatment process for saline-alkali soil reformation wastewater, is characterized in that, comprises the following steps:
In June-October, by the Waste Water Centralized that produces after alkaline land improvement in water reservoir; Wherein, the degree of depth of described water reservoir is 1.5-1.7 rice;
In February in December-Second Year, the subglacial water that the waste water in water reservoir produces surperficial ice cube and contains salt under external temperature, is transferred to subglacial water in evaporation tank and generates the first ice sheet and the first subglacial salt solution;
In Second Year April-June, make the first subglacial salt solution carry out spontaneous evaporation, obtain salt and salt solution;
After the surperficial ice cube in described water reservoir dissolves, in described water reservoir, cultivate raw fish then;
Water after breeding fish in water reservoir and the first ice sheet in evaporation tank are dissolved the Water Spreading farmland of rear generation.
2. the treatment process of saline-alkali soil reformation wastewater according to claim 1, is characterized in that, in described June-October, before the Waste Water Centralized that produces after alkaline land improvement to the step in water reservoir, also comprises:
Form water reservoir and evaporation tank on the ground.
3. the treatment process of saline-alkali soil reformation wastewater according to claim 1, it is characterized in that, in February in December-Second Year, the subglacial water that waste water in water reservoir produces surperficial ice cube and contains salt under external temperature, subglacial water is transferred in evaporation tank in the step generating the first ice sheet and the first subglacial salt solution, described subglacial water is transferred in evaporation tank, specifically comprises:
By water pump, described subglacial water is transferred in described evaporation tank.
4. the treatment process of saline-alkali soil reformation wastewater according to claim 3, is characterized in that, described after the surperficial ice cube in described water reservoir dissolves, cultivates in the step of raw fish then in described water reservoir:
Described raw fish then comprise in loach, grass carp, crucian or carp one or more.
5. the treatment process of saline-alkali soil reformation wastewater according to claim 4, is characterized in that, described water after breeding fish in water reservoir and the first ice sheet in evaporation tank are dissolved after after the Water Spreading farmland that produces, also comprise:
In Second Year November-December, make the salt solution in evaporation tank under external temperature, generate the second ice sheet and the second subglacial salt solution;
Second subglacial salt solution is transferred to shine in salt pond and evaporates brine;
Water Spreading farmland after second ice sheet is dissolved.
6. the treatment process of saline-alkali soil reformation wastewater according to claim 5, is characterized in that, described second subglacial salt solution is transferred to shine in salt pond carry out, in the step of evaporating brine, also comprising:
Artemia culture in described solarization salt pond.
7. the treatment process of saline-alkali soil reformation wastewater according to claim 6, is characterized in that, described second ice sheet is dissolved after Water Spreading farmland step after, also comprise:
Described water reservoir, evaporation tank and solarization salt pond are filled and led up.
8. the treatment process of saline-alkali soil reformation wastewater according to claim 7, is characterized in that, in the described step filled and led up in described water reservoir, evaporation tank and solarization salt pond, specifically comprises:
After described water reservoir, evaporation tank and solarization salt pond are filled and led up, for Planting Crops.
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| CN201310277572.XA CN103303988B (en) | 2013-07-03 | 2013-07-03 | Treatment method of saline-alkali soil reformation wastewater |
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| CN201310277572.XA CN103303988B (en) | 2013-07-03 | 2013-07-03 | Treatment method of saline-alkali soil reformation wastewater |
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| CN103303988B true CN103303988B (en) | 2015-01-07 |
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| CN106045154A (en) * | 2016-07-12 | 2016-10-26 | 山东胜伟园林科技有限公司 | Process for treating wastewater generated after saline-alkali soil improvement |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3872909A (en) * | 1972-01-10 | 1975-03-25 | Atomic Energy Commission | Method of desalinating salt water |
| JPH02191586A (en) * | 1989-01-19 | 1990-07-27 | Kawanami Shunpei | Device for desalting sea water |
| CN1686839A (en) * | 2005-03-25 | 2005-10-26 | 田魁祥 | Method for desalting bitter through ice making by using natural cold source |
| CN202022818U (en) * | 2011-03-17 | 2011-11-02 | 杜文娟 | Facility utilizing natural resources to produce ice to desalt seawater and produce salt |
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2013
- 2013-07-03 CN CN201310277572.XA patent/CN103303988B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3872909A (en) * | 1972-01-10 | 1975-03-25 | Atomic Energy Commission | Method of desalinating salt water |
| JPH02191586A (en) * | 1989-01-19 | 1990-07-27 | Kawanami Shunpei | Device for desalting sea water |
| CN1686839A (en) * | 2005-03-25 | 2005-10-26 | 田魁祥 | Method for desalting bitter through ice making by using natural cold source |
| CN202022818U (en) * | 2011-03-17 | 2011-11-02 | 杜文娟 | Facility utilizing natural resources to produce ice to desalt seawater and produce salt |
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