CN104891773A - Method for preparing soil-water mixture suitable for vacuum dehydration - Google Patents
Method for preparing soil-water mixture suitable for vacuum dehydration Download PDFInfo
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- CN104891773A CN104891773A CN201410091138.7A CN201410091138A CN104891773A CN 104891773 A CN104891773 A CN 104891773A CN 201410091138 A CN201410091138 A CN 201410091138A CN 104891773 A CN104891773 A CN 104891773A
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- water mixture
- soil
- extraction
- vacuum hydro
- vacuum dehydration
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Abstract
Due to high moisture content of a soil-water mixture, storage, transportation and soil re-utilization of the soil-water mixture are inconvenient. In order to solve the problem of low possibility of dehydration of the soil-water mixture, the present invention provides a method for preparing the soil-water mixture suitable for vacuum dehydration, wherein calcium hydroxide (Ca(OH)2) with a soil-water mixture of 0.1-2% by weight s added to the soil-water mixture; after the Ca(OH)2 is added to the soil-water mixture, ion exchange and flocculation are performed, so that soil composition is changed, the clay content is reduced, and the property of water ratio limit is improved; the Ca(OH)2 is made into slurry (or powder), and the slurry (or the powder) and the soil-water mixture are mechanically stirred to prepare the soil-water mixture suitable for the vacuum dehydration.
Description
Technical field
The present invention relates to a kind of dosage of native water mixture vacuum hydro-extraction, before more specifically relating to the vacuum hydro-extraction of the mud of water content between 30%-80%, mud, mud, need the dosage nursed one's health in advance.
Technical background
Soil water mixture is high because of its water ratio, brings inconvenience to the recycling of the storage of native water mixture, transport and soil.
At present, the admixture of native water mixture dehydration is divided into two classes, and a class is inorganic flocculating agent, and another kind of is organic polymer coargulator.All there is the shortcoming that cost is high, be not suitable for vacuum hydro-extraction process in this two class.Therefore, be badly in need of developing low-cost and be applicable to the admixture of vacuum hydro-extraction.
Summary of the invention
The object of the invention is to provide a kind of native water mixture dosage being suitable for vacuum hydro-extraction.
Principle of design of the present invention is in native water mixture, mix the calcium hydroxide of native water mixture weight 0.1%-2% (Ca (OH)
2).Calcium hydroxide (Ca (OH) is mixed in native water mixture
2) after, ion-exchange and throwing out occur, and wherein the content of ion exchange and glutinous grain (< 0.002mm) has direct relation.Because glutinous grain has larger specific surface area, the surface energy that the higher Particle surface charge of its content is formed is larger, and it is more remarkable that corresponding ion-exchange capacity is carried out.The result of ion-exchange makes the electrostatic double layer of grogs thinning, and Bound moisture reduces, and therefore can reduce the bonding force between grogs.Calcium hydroxide (Ca (OH)
2) when mixing with native water mixture, by the flocculation of clay particle, the composition of soil there occurs change, along with calcium hydroxide (Ca (OH)
2) increase of content, artificial reduces sticky content, makes the small-particle in soil become large grain group.So, when native water mixture mixes calcium hydroxide (Ca (OH)
2) after, the content of glutinous grain reduces, and limit moisture content character is improved.
The using method that the present invention is suitable for the native water mixture dosage of vacuum hydro-extraction is as follows: by calcium hydroxide (Ca (OH)
2) make slurry condition (or powdery), and namely native water mixture can be made into the native water mixture being applicable to vacuum hydro-extraction through mechanical stirring, after vacuum hydroextractor dehydration, Tu Shui is separated.
Specific implementation method
Embodiment 1
Get the good sewage treatment plant residual mud of resistance to air loss, water content 60%, obtains hmc 3mm after vacuum hydro-extraction, and moisture 35%.
Embodiment 2
Get the good sewage treatment plant residual mud of resistance to air loss, water content 60%, add the calcium hydroxide (Ca (OH) of mud weight 0.3%
2), stir, obtain hmc 5mm after vacuum hydro-extraction, moisture 20%, increase 2mm than obtaining hmc after primary sludge vacuum hydro-extraction, water ratio reduces by 15%.
Embodiment 3
Get the good sewage treatment plant residual mud of resistance to air loss, water content 60%, add the calcium hydroxide (Ca (OH) of mud weight 0.5%
2), stir, obtain hmc 6mm after vacuum hydro-extraction, moisture 20%, increase 3mm than obtaining hmc after primary sludge vacuum hydro-extraction, water ratio reduces by 15%.
Embodiment 4
Get the good sewage treatment plant residual mud of resistance to air loss, water content 60%, add the calcium hydroxide (Ca (OH) of mud weight 0.8%
2), stir, obtain hmc 7mm after vacuum hydro-extraction, moisture 20%, increase 4mm than obtaining hmc after primary sludge vacuum hydro-extraction, water ratio reduces by 15%.
Embodiment 5
Get the good sewage treatment plant residual mud of resistance to air loss, water content 60%, add the calcium hydroxide (Ca (OH) of mud weight 1.1%
2), stir, obtain hmc 8mm after vacuum hydro-extraction, moisture 19%, increase 5mm than obtaining hmc after primary sludge vacuum hydro-extraction, water ratio reduces by 16%.
Embodiment 6
Get the good sewage treatment plant residual mud of resistance to air loss, water content 60%, add the calcium hydroxide (Ca (OH) of mud weight 1.5%
2), stir, obtain hmc 9mm after vacuum hydro-extraction, moisture 19%, increase 6mm than obtaining hmc after primary sludge vacuum hydro-extraction, water ratio reduces by 16%.
Embodiment 7
Get the good sewage treatment plant residual mud of resistance to air loss, water content 60%, add the calcium hydroxide (Ca (OH) of mud weight 2%
2), stir, obtain hmc 11mm after vacuum hydro-extraction, moisture 18%, increase 8mm than obtaining hmc after primary sludge vacuum hydro-extraction, water ratio reduces by 17%.
Claims (1)
1. be suitable for a native water mixture dosage for vacuum hydro-extraction, it is characterized in that: the calcium hydroxide (Ca (OH) evenly adding the water mixture weight 0.1%-2% that buries in native water mixture
2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410091138.7A CN104891773A (en) | 2014-03-09 | 2014-03-09 | Method for preparing soil-water mixture suitable for vacuum dehydration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410091138.7A CN104891773A (en) | 2014-03-09 | 2014-03-09 | Method for preparing soil-water mixture suitable for vacuum dehydration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104891773A true CN104891773A (en) | 2015-09-09 |
Family
ID=54024809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410091138.7A Pending CN104891773A (en) | 2014-03-09 | 2014-03-09 | Method for preparing soil-water mixture suitable for vacuum dehydration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104891773A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03275200A (en) * | 1990-03-26 | 1991-12-05 | Kurita Water Ind Ltd | Thickening and dehydrating method for organic sludge |
| CN101691272A (en) * | 2009-10-01 | 2010-04-07 | 厦门水务集团有限公司 | Sludge dewatering method |
| CN101863608A (en) * | 2010-06-02 | 2010-10-20 | 骆嘉成 | Solid-liquid separation process for drilled pile waste mud |
| CN102303944A (en) * | 2011-08-22 | 2012-01-04 | 广州普得环保设备有限公司 | Method for re-treating dewatered sludge |
| CN103588365A (en) * | 2012-08-14 | 2014-02-19 | 中国石油化工股份有限公司 | Hydrothermal treatment method of municipal sludge |
-
2014
- 2014-03-09 CN CN201410091138.7A patent/CN104891773A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03275200A (en) * | 1990-03-26 | 1991-12-05 | Kurita Water Ind Ltd | Thickening and dehydrating method for organic sludge |
| CN101691272A (en) * | 2009-10-01 | 2010-04-07 | 厦门水务集团有限公司 | Sludge dewatering method |
| CN101863608A (en) * | 2010-06-02 | 2010-10-20 | 骆嘉成 | Solid-liquid separation process for drilled pile waste mud |
| CN102303944A (en) * | 2011-08-22 | 2012-01-04 | 广州普得环保设备有限公司 | Method for re-treating dewatered sludge |
| CN103588365A (en) * | 2012-08-14 | 2014-02-19 | 中国石油化工股份有限公司 | Hydrothermal treatment method of municipal sludge |
Non-Patent Citations (1)
| Title |
|---|
| 梁德胜: "折带式真空过滤机-抽气装置在污泥脱水中的应用", <<化工环保>> * |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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Application publication date: 20150909 |