CN101683033A - Method for quickly desalting dredgerfill by using desulfurization gypsum (DSG) - Google Patents
Method for quickly desalting dredgerfill by using desulfurization gypsum (DSG) Download PDFInfo
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- CN101683033A CN101683033A CN200910169368A CN200910169368A CN101683033A CN 101683033 A CN101683033 A CN 101683033A CN 200910169368 A CN200910169368 A CN 200910169368A CN 200910169368 A CN200910169368 A CN 200910169368A CN 101683033 A CN101683033 A CN 101683033A
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- dredgerfill
- desulfurated plaster
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Abstract
The invention discloses a method for quickly desalting dredgerfill by using desulfurization gypsum (DSG). The method comprises that: when the water content of the dredgerfill reaches about 10 percent,adding desulfurization gypsum which is a product of the flue gas desulfurization of a coal fired power plant in 30 to 40 centimeter soil body in an amount which is 5 to 10 percent of the mass of soil, and fully mixing the desulfurization gypsum and the dredgerfill; paving a spray-insulating layer in an required depth of 1.0 to 1.2 meters; flooding for salt-leaching, wherein the amount of the flooding water is 1.0 to 1.2m<3>/m<2>, and the flooding is performed fractionally; and discharging leached salt and reducing salt till a standard for planting soil is met. The method realizes the in-situutilization and direct greening of the dredgerfill, solves the problem of the tense situation of soil and promotes the greening development of dredgerfill areas. The main ingredient of a calcium conditioner for increasing the breathability and loading capacity of the dredgerfill, namely the desulfurization gypsum which is the product of the flue gas desulfurization of the coal fired power plant, is CaSO4.2H2O. After being mixed with the desulfurization gypsum, the dredgerfill is improved in mechanical component and water and air permeability, so the dredgerfill can be quickly dewatered and desalted, and the secondary basification in the desalting process is inhibited.
Description
Technical field
The present invention relates to a kind of method that makes the barged-in fill quick desalination, particularly a kind of method of utilizing desulfurated plaster (DSG) to make the barged-in fill quick desalination.
Background technology
Bay mud (sea silt soil) fixed drainage and the soil that forms is referred to as barged-in fill (dredger fill) on the engineering of bay after hydraulic reclamation epeirogenetic belongs to the hemipelagic sediment of upper river water and soil loss.Some fundamental propertys that possess soil, as colloidality, adsorptivity, replacement etc., barged-in fill belongs to the long-pending body matrix type in sea, does not pass through soil-forming process such as physical weathering, chemical weathering and biological weathering as yet.Mechanical composition mostly is powder (sand) grain and clay, and the soil structurelessness is hard when doing, mire when wet.Solvable salt content is high, is generally 1.5%～2.5%, and sodium, chlorion account for the absolute predominance of total ion concentration.Ventilation infiltration ability extreme difference is directly used water wash, and salinity is difficult to wash off.In a word, the barged-in fill proterties is more inferior than marine solonchak, can not directly plant ornamental plant.
According to statistics, main SO in Tianjin in 2004
2Discharge capacity is about more than 120,000 tons.According to 1 ton of SO
2Produce 2.7 tons of desulfurated plasters and calculate, if flue gas desulfurization device is all installed additional in all enterprises, Tianjin will produce about desulfurated plaster more than 350,000 tons in 1 year.In addition, each high-power station of Tianjin is also enlarging installed capacity in the recent period, and the amount of desulfurated plaster can increase fast in several years of future.Desulfurated plaster is not only low than plaster of paris price, and stable components, purity are higher.
PORT OF TIANJIN planning hydraulic reclamation area 200km
2, now become land 70km
2, the 30km of shaping
2, to the year two thousand twenty, the afforestation coverage rate of PORT OF TIANJIN will reach 25%, therefore, and the main region that these land resourcess are afforested after all being.
For accelerating the speed that urban economy is built, should make great efforts to improve the ecological environment, increase greenery area, improve green cover percentage.But directly greening is difficult on barged-in fill.At present, greening is built and is mostly adopted the method for " soil moved in to improve the original " to carry out on the barged-in fill, buys anthropogenic soil from periphery and afforests construction.Now, country has forbidded strictly to ruin ploughs bad ground, and therefore, the large tracts of land soil moved in to improve the original will be difficult to implement after making green way, and the integrated cost of building exploitation is increased.Therefore, the improvement of barged-in fill original position utilization utilizes significant.
Summary of the invention
The heavy solid back of barged-in fill absolute altitude requires to reach more than the 5m, when the moisture of waiting to improve barged-in fill drops to 10% left and right sides, according to the designing requirement ground grading, encloses low bank between fields.According to the proterties of barged-in fill, mix people's desulfurated plaster according to 5% ~ 10% ratio of 30cm～40cm soil body quality, desulfurated plaster is fully mixed with barged-in fill.Salt deposit is drenched in the shop in the following 1.0m-1.2m of absolute altitude place, and the salinity that washes out is drained.The flood irrigation desalinization of soil by flooding or leaching, irrigation quantity 1.0m
3-1.2m
3/ m
2, gradation is poured water, and salinity can be reduced to the standard of planting soil.Apply fertilizer before the plantation, add phosphate fertilizer in right amount, the plantation saline alkali tolerant plant.
Specific embodiment:
The present invention also is described in further detail in conjunction with the embodiments:
1, leaching test
Adopt barged-in fill to carry out the test of lab simulation leaching, the statistics salinity changes after 15 days, the results are shown in Table 1:
Salinity before and after the improvement of table 1 40cm barged-in fill changes (%)
Improvement back Cl
-And Na
+Content reduces significantly, the highest decreasing by more than 99%.These two kinds of ions are harm plant growings, destroy the main factor of soil structure, and their minimizing significantly can provide safe growing environment for the growth of plant.
Add desulfurated plaster and can not only significantly reduce the content of harmful ion, and can also accelerate the drip washing time of barged-in fill.Whole cylinder (1m) all can be soaked in 48 hours, the soil thickness that former barged-in fill soaked in 48 hours is 22cm, and in the time of 15 days, the migration distance of moisture is 49cm only.After applying the improvement material, the desalination speed of barged-in fill can be accelerated, under the condition of having abundant water resources, barged-in fill top layer salt content can be reduced within a short period of time.
2. physical behavior relatively
The variation of physical index before and after table 2 improvement
Add the improvement material and can not only obviously reduce the content of harmful ion, and can also accelerate the drip washing time of barged-in fill.As seen from Table 2, improvement back infiltration rate is accelerated greatly, and unit weight obviously reduces, and water immersed bulk density is bigger than former barged-in fill, illustrates that conditioner stability is strong, and anti-water bearing capacity is good.
3, plant planting experiment
The barged-in fill pot experiment: soil is not through soaking directly drip washing behind the adding improvement material.After 1 month, the salinity of upper soll layer obviously descends, chlorion fall maximum especially, and the decline situation of each salinity sees Table 3:
The interpretation of result of table 3 barged-in fill planting experiment
After applying the improvement material, can accelerate the desalination speed of barged-in fill, under the condition of having abundant water resources, can reduce barged-in fill top layer salt content within a short period of time, make the maximum Cl of plant growing harm
-And Na
+Reduction amplitude maximum, reach 92% and 60% respectively.On the barged-in fill of desalination, broadcast sowing the not Bai Sanye seed of salt tolerant, can germination and emergence, primary growth is normal.
Claims (5)
1, a kind of method of utilizing desulfurated plaster (DSG) to make the barged-in fill quick desalination, its primary raw material is the by product desulfurated plaster of coal-fired plant flue gas desulfurization, main component is CaSO
42H
2O is characterized in that: the water content of barged-in fill can not be too high, generally about 10%, can carry out the blending operation; Used desulfurated plaster contains effective composition CaSO
42H
2The amount of O is at 80%-90%; Barged-in fill will fully mix with desulfurated plaster.
2, require a kind of method of utilizing desulfurated plaster (DSG) to make the barged-in fill quick desalination according to right 1, it is characterized in that the material grains particle diameter of desulfurated plaster is mainly 30-50um.
3, require a kind of method of utilizing desulfurated plaster (DSG) to make the barged-in fill quick desalination according to right 1, the using method that it is characterized in that desulfurated plaster is for calculating by mass, desulfurated plaster is mixed in 5% ~ 10% ratio and barged-in fill, ground is smooth, enclose low bank between fields, the desalination of pouring water then.
4, utilize desulfurated plaster (DSG) to make the method for barged-in fill quick desalination according to 3 one kinds of rights, it is characterized in that improveing 1 square metre salt affected soil need pour water 1.0 ~ 1.2 cubes and carry out the desalinization of soil by flooding or leaching, can utilize natural precipitation desalination in rainy season, but also manual priming's desalination, adopt manual priming's gradation perfusion, suitably for the first time the filling more.
5, utilize desulfurated plaster (DSG) to make the method for barged-in fill quick desalination according to 3 one kinds of rights, it is characterized in that modified soil layer bottom laying trickle layer or sewer, the water that oozes is down discharged.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910169368A CN101683033A (en) | 2009-08-27 | 2009-08-27 | Method for quickly desalting dredgerfill by using desulfurization gypsum (DSG) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910169368A CN101683033A (en) | 2009-08-27 | 2009-08-27 | Method for quickly desalting dredgerfill by using desulfurization gypsum (DSG) |
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| CN101683033A true CN101683033A (en) | 2010-03-31 |
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| CN200910169368A Pending CN101683033A (en) | 2009-08-27 | 2009-08-27 | Method for quickly desalting dredgerfill by using desulfurization gypsum (DSG) |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102344324A (en) * | 2011-07-07 | 2012-02-08 | 大连工业大学 | Dealkalized wet desulfurization waste fertilizer and preparation method thereof |
| CN102498775A (en) * | 2011-11-07 | 2012-06-20 | 天津市北方园林生态科学技术研究所 | Method for restraining secondary basification of saline soil |
| CN102498772A (en) * | 2011-11-07 | 2012-06-20 | 天津市北方园林生态科学技术研究所 | Method for in-situ improvement of dredger fill into soil for planting |
| CN103069944A (en) * | 2013-01-04 | 2013-05-01 | 中国科学院东北地理与农业生态研究所 | Method for quickly modifying severe soda alkali-saline soil |
| CN103262689A (en) * | 2013-05-27 | 2013-08-28 | 天津天一景观规划设计有限公司 | Coastal saline-alkali soil terrace type afforesting method for improvement of dredger fill |
| CN103749022A (en) * | 2013-12-27 | 2014-04-30 | 华东师范大学 | Method for utilizing flue gas desulfurization gypsum to accelerate tideland reclamation saline-alkali land desalination |
| CN104322172A (en) * | 2014-10-25 | 2015-02-04 | 中国科学院东北地理与农业生态研究所 | Soda saline soil homogenizing and improving method |
| CN104399740A (en) * | 2014-11-18 | 2015-03-11 | 青岛新天地环境保护有限责任公司 | Horizontal water stopping layer structure and method thereof for contaminated soil remediation |
| CN106165570A (en) * | 2016-07-11 | 2016-11-30 | 山东胜伟园林科技有限公司 | A kind of method utilizing desulfurated plaster improvement Rice Cropping salt-soda soil under Sprinkler Irrigation |
| CN106187588A (en) * | 2016-07-11 | 2016-12-07 | 山东胜伟园林科技有限公司 | A kind of salt-soda soil compound fertilizer being suitable to jujube growth and application process |
| CN106583434A (en) * | 2017-01-23 | 2017-04-26 | 清华大学 | Improvement and use method of saline and alkaline land |
| CN110679226A (en) * | 2019-10-23 | 2020-01-14 | 上海园林绿化建设有限公司 | Construction method combining dredger fill improvement and planting hole improvement |
| CN112205111A (en) * | 2020-07-21 | 2021-01-12 | 中国矿业大学(北京) | Method for improving soil of open pit coal mine dump by desulfurized gypsum |
-
2009
- 2009-08-27 CN CN200910169368A patent/CN101683033A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102344324A (en) * | 2011-07-07 | 2012-02-08 | 大连工业大学 | Dealkalized wet desulfurization waste fertilizer and preparation method thereof |
| CN102498775A (en) * | 2011-11-07 | 2012-06-20 | 天津市北方园林生态科学技术研究所 | Method for restraining secondary basification of saline soil |
| CN102498772A (en) * | 2011-11-07 | 2012-06-20 | 天津市北方园林生态科学技术研究所 | Method for in-situ improvement of dredger fill into soil for planting |
| CN103069944A (en) * | 2013-01-04 | 2013-05-01 | 中国科学院东北地理与农业生态研究所 | Method for quickly modifying severe soda alkali-saline soil |
| CN103262689A (en) * | 2013-05-27 | 2013-08-28 | 天津天一景观规划设计有限公司 | Coastal saline-alkali soil terrace type afforesting method for improvement of dredger fill |
| CN103749022B (en) * | 2013-12-27 | 2017-02-15 | 华东师范大学 | Method for utilizing flue gas desulfurization gypsum to accelerate tideland reclamation saline-alkali land desalination |
| CN103749022A (en) * | 2013-12-27 | 2014-04-30 | 华东师范大学 | Method for utilizing flue gas desulfurization gypsum to accelerate tideland reclamation saline-alkali land desalination |
| CN104322172A (en) * | 2014-10-25 | 2015-02-04 | 中国科学院东北地理与农业生态研究所 | Soda saline soil homogenizing and improving method |
| CN104399740A (en) * | 2014-11-18 | 2015-03-11 | 青岛新天地环境保护有限责任公司 | Horizontal water stopping layer structure and method thereof for contaminated soil remediation |
| CN106165570A (en) * | 2016-07-11 | 2016-11-30 | 山东胜伟园林科技有限公司 | A kind of method utilizing desulfurated plaster improvement Rice Cropping salt-soda soil under Sprinkler Irrigation |
| CN106187588A (en) * | 2016-07-11 | 2016-12-07 | 山东胜伟园林科技有限公司 | A kind of salt-soda soil compound fertilizer being suitable to jujube growth and application process |
| CN106583434A (en) * | 2017-01-23 | 2017-04-26 | 清华大学 | Improvement and use method of saline and alkaline land |
| CN110679226A (en) * | 2019-10-23 | 2020-01-14 | 上海园林绿化建设有限公司 | Construction method combining dredger fill improvement and planting hole improvement |
| CN112205111A (en) * | 2020-07-21 | 2021-01-12 | 中国矿业大学(北京) | Method for improving soil of open pit coal mine dump by desulfurized gypsum |
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Application publication date: 20100331 |