CN114933405A - River sediment dehydrating agent, river sediment dehydrating method and recycling method - Google Patents
River sediment dehydrating agent, river sediment dehydrating method and recycling method Download PDFInfo
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- CN114933405A CN114933405A CN202210556310.6A CN202210556310A CN114933405A CN 114933405 A CN114933405 A CN 114933405A CN 202210556310 A CN202210556310 A CN 202210556310A CN 114933405 A CN114933405 A CN 114933405A
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- river sediment
- river
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0418—Wet materials, e.g. slurries
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
Abstract
The invention discloses a river sediment dehydrating agent, a river sediment dehydrating method and a recycling method, wherein the river sediment dehydrating agent comprises the following components in parts by weight: 20-25 parts of calcium peroxide, 12-16 parts of polyacrylamide, 15-20 parts of fly ash, 14-16 parts of aluminum chloride, 12-15 parts of sodium metasilicate and 8-27 parts of ferric chloride. The river sediment dehydrating agent provided by the invention has the advantages that the water content of the dredged sediment can be reduced to be below 40%, the volume of the sludge is greatly reduced, the dehydrated sludge is suitable for a river slope planting soil raw material or a roadbed filling material, the used medicament components are environment-friendly, the dehydration equipment cannot be corroded, the quantity of the dredged sludge is reduced, and the ecological environment quality is favorably improved.
Description
Technical Field
The invention relates to the field of sludge treatment, in particular to a river sediment dehydrating agent, a river sediment dehydrating method and a recycling method.
Background
The black and odorous river channel is not only seriously polluted by overlying water and water, but also has bottom mud as endogenous pollution, and the influence on the formation of the black and odorous river channel cannot be ignored. The bottom mud can be used as a 'sink' for collecting pollutants brought by the effects of water body sedimentation, adsorption and the like; meanwhile, under specific environmental conditions, the bottom sludge can be used as a 'source' for releasing pollutants into the water body again, thereby causing secondary pollution to the water body. When exogenous pollution is controlled, the control of pollutants in the bottom mud becomes an important limiting factor for improving water quality.
The domestic black and odorous water body treatment engineering is mainly to excavate and dredge the river channel sediment, and as the water content of the river channel sediment is as high as 80%, the river channel sediment is easy to leak in the dredging and transferring process, so that the secondary pollution is generated to the surrounding environment, and the large amount of sediment occupies a large amount of treatment sites, so that the treatment cost is increased, and the reduction of the river channel sediment is the key for reducing the black and odorous water body treatment engineering cost and the environmental risk.
Disclosure of Invention
The invention aims to solve the problems of high organic matter content, difficult reduction and high disposal cost of the bottom mud of the river channel.
In order to achieve the above object, the present invention provides a river sediment dehydrating agent comprising, in parts by weight:
20-25 parts of calcium peroxide, namely,
12-16 parts of Polyacrylamide (PAM),
15-20 parts of fly ash,
14-16 parts of aluminum chloride, namely,
12-15 parts of sodium metasilicate,
8-27 parts of ferric chloride.
Preferably, the river sediment dewatering agent comprises the following components in parts by weight:
22 parts of calcium peroxide, namely, calcium peroxide,
14 parts of polyacrylamide, namely 14 parts of polyacrylamide,
18 parts of fly ash, namely 18 parts of fly ash,
15 parts of aluminum chloride, namely, aluminum chloride,
14 parts of sodium metasilicate, namely, 14 parts of,
17 parts of ferric chloride.
Preferably, the polyacrylamide is a cationic polyacrylamide.
The invention also provides a river sediment dehydration method, which comprises the following steps: adding the river sediment dehydrating agent into the sediment to be treated, wherein the adding amount of the dehydrating agent is 3-5% of the mass of the sediment to be treated, and sequentially stirring, precipitating and dehydrating to treat the river sediment.
Preferably, the stirring time is 8-12 min.
Preferably, the precipitation time is at least 30 min.
Preferably, the bottom sludge is dewatered by a plate and frame filter press.
Preferably, the method further comprises the step of detecting the water content of the dewatered river sediment.
The invention also provides a method for recycling the river sediment, the river sediment is treated by the river sediment dehydrating agent, and the dehydrated river sediment is used as a planting soil raw material.
The invention also provides a method for recycling the river sediment, the river sediment is treated by the river sediment dehydrating agent, and the dehydrated river sediment is used as a roadbed filling material.
The invention has the beneficial effects that:
the river sediment dehydrating agent provided by the invention has the advantages that the water content of the dredged sediment can be reduced to be below 40%, the volume of the sludge is greatly reduced, the dehydrated sludge is suitable for a river slope planting soil raw material or a roadbed filling material, the used medicament components are environment-friendly, the dehydration equipment cannot be corroded, the quantity of the dredged sludge is reduced, and the ecological environment quality is favorably improved.
Detailed Description
The technical solutions of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The domestic research on the sediment dehydration medicament focuses on the sediment of the sewage plant, and the sediment of the sewage plant and the sediment of the river channel are different from the characteristics of the sediment and the following treatment emphasis points, so that the dehydration medicament for the municipal sediment cannot be directly used for the dehydration of the sediment of the river channel. From the property of the bottom mud, the organic matter content in the bottom mud of the river channel is obviously higher than that of the municipal bottom mud, and the specific gravity of sand particles in the bottom mud of the river channel is obviously higher than that of the municipal bottom mud. From the aspect of subsequent treatment, municipal sediment produced by a sewage plant is mainly transported and treated after being dehydrated in the plant, the in-situ resource utilization is increasingly promoted by the sediment of the river in the black and odorous water treatment engineering, and the dehydrated sediment is encouraged to be used as a green channel planting material, a roadbed filling material and the like on the side slope of the river. Therefore, the river sediment dehydration medicament has the dehydration effect and the consolidation property of the dehydrated sediment so as to be recycled later.
Example 1:
the river sediment dehydrating agent comprises the following components: 20 parts of calcium peroxide, 12 parts of cationic PAM (polyacrylamide), 15 parts of fly ash, 14 parts of aluminum chloride, 12 parts of sodium metasilicate and 27 parts of ferric chloride.
The river sediment dehydration method comprises the following steps: 100kg of river dredging sludge in the river-crossing city is taken, the water content of the river sediment is 70 percent, and the organic matter content is 25 percent. Adding the river sediment dehydration agent by 5% of the mass of the river sediment, stirring for 10 minutes, stopping, precipitating for 30 minutes, separating sludge from water, and dehydrating the precipitated sludge through a plate-and-frame filter press. And (5) taking the dewatered sludge under the machine for water content detection, wherein the water content is 42%.
Example 2:
the river sediment dehydrating agent comprises the following components: 25 parts of calcium peroxide, 16 parts of cationic PAM, 20 parts of fly ash, 16 parts of aluminum chloride, 15 parts of sodium metasilicate and 8 parts of ferric chloride. 200kg of coastal river dredging sludge of Shanghai city is taken, the water content of the river sediment is 76%, and the organic matter content is 15%. Adding the efficient dehydration medicament by 3 percent of the mass of the river sediment, stirring for 10 minutes, stopping, precipitating for 30 minutes, separating sludge from water, and dehydrating the precipitated sludge through a plate-and-frame filter press. And (5) taking the dewatered sludge under the machine for water content detection, wherein the water content is 38%.
Example 3:
the high-efficiency dehydration medicament comprises the following components: 22 parts of calcium peroxide, 14 parts of cationic PAM, 18 parts of fly ash, 15 parts of aluminum chloride, 14 parts of sodium metasilicate and 17 parts of ferric chloride. 200kg of riverway dredging sludge in Yinchuan city is taken, the water content of the riverway sediment is 68 percent, and the organic matter content is 20 percent. The efficient dehydration medicament is added by 4% of the mass of the river sediment, the mixture is stirred for 10 minutes and then is stopped, the sludge and the water are separated after the mixture is precipitated for 30 minutes, and the precipitated sludge is dehydrated through a plate-and-frame filter press. And (4) taking the dewatered sludge under the machine for water content detection, wherein the water content is 36%.
The river sediment treated in the examples 1 to 3 is recovered and can be directly used as a planting soil raw material or a roadbed filling material.
In conclusion, the invention provides the river sediment dehydrating agent, the water content of the dredged sediment can be reduced to be below 40% by using the river sediment dehydrating agent, the volume of the sludge is greatly reduced, the dehydrated sludge is suitable for the raw materials of the soil for planting on the side slope of the river or the roadbed filling materials, the used medicament components are environment-friendly, the dehydration equipment cannot be corroded, the reduction of the dredged sludge is realized, and the improvement of the quality of the ecological environment is facilitated.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (10)
1. The river sediment dehydrating agent is characterized by comprising the following components in parts by weight:
20-25 parts of calcium peroxide, namely,
12-16 parts of Polyacrylamide (PAM),
15-20 parts of fly ash,
14-16 parts of aluminum chloride, namely,
12-15 parts of sodium metasilicate,
8-27 parts of ferric chloride.
2. The river sediment dewatering agent according to claim 1, wherein the river sediment dewatering agent comprises, in parts by weight:
22 parts of calcium peroxide, namely calcium peroxide,
14 parts of polyacrylamide, namely 14 parts of polyacrylamide,
18 parts of fly ash, namely 18 parts of fly ash,
15 parts of aluminum chloride, namely, aluminum chloride,
14 parts of sodium metasilicate, namely 14 parts of,
17 parts of ferric chloride.
3. The river sediment dewatering agent according to claim 1, wherein the polyacrylamide is a cationic polyacrylamide.
4. A river sediment dehydration method is characterized by comprising the following steps: adding the river sediment dehydrating agent as defined in any one of claims 1-3 into the sediment to be treated, wherein the adding amount of the dehydrating agent is 3% -5% of the mass of the sediment to be treated, and treating the sediment in turn by stirring, precipitating and dehydrating.
5. The method for dewatering riverway bottom mud according to claim 4, wherein the stirring time is 8-12 min.
6. The method of dewatering river sediment according to claim 4, wherein the settling time is at least 30 min.
7. The method for dewatering riverway sludge according to claim 4, wherein the sludge is dewatered by a plate and frame filter press.
8. The method for dehydrating the river sediment according to claim 4, further comprising the step of detecting the water content of the dehydrated river sediment.
9. A method for recycling river sediment, characterized in that the river sediment is treated by the river sediment dehydrating agent according to any one of claims 1 to 3, and the dehydrated river sediment is used as a planting soil raw material.
10. A method for recycling river sediment, characterized in that the river sediment is treated by the river sediment dehydrating agent according to any one of claims 1 to 3, and the dehydrated river sediment is used as a roadbed filling material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210556310.6A CN114933405A (en) | 2022-05-20 | 2022-05-20 | River sediment dehydrating agent, river sediment dehydrating method and recycling method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210556310.6A CN114933405A (en) | 2022-05-20 | 2022-05-20 | River sediment dehydrating agent, river sediment dehydrating method and recycling method |
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| CN114933405A true CN114933405A (en) | 2022-08-23 |
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| CN202210556310.6A Pending CN114933405A (en) | 2022-05-20 | 2022-05-20 | River sediment dehydrating agent, river sediment dehydrating method and recycling method |
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Citations (7)
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|---|---|---|---|---|
| CN1384806A (en) * | 1999-10-06 | 2002-12-11 | 卡米拉卡米股份公司 | Cationic polymers for sludge dewatering |
| JP2006247630A (en) * | 2005-03-09 | 2006-09-21 | Kazuishi Satou | Waste water treating hydrophobization solid-liquid separating medium |
| WO2013064492A1 (en) * | 2011-11-04 | 2013-05-10 | Omya Development Ag | Surface -treated calcium carbonate and its use in water purification and for the dewatering of sludges and sediments |
| CN107032580A (en) * | 2017-05-23 | 2017-08-11 | 北京首创污泥处置技术股份有限公司 | A kind of sludge dewatering agent and its application method |
| CN108911476A (en) * | 2018-07-18 | 2018-11-30 | 李鹏 | A kind of sludge drying inorganic agent |
| CN110734202A (en) * | 2019-09-30 | 2020-01-31 | 哈尔滨工业大学（深圳） | river channel black and odorous bottom mud repairing and utilizing method |
| CN113800745A (en) * | 2021-09-06 | 2021-12-17 | 东莞市凯威尔环保材料有限公司 | Organic dehydrating agent for dredging sludge |
-
2022
- 2022-05-20 CN CN202210556310.6A patent/CN114933405A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1384806A (en) * | 1999-10-06 | 2002-12-11 | 卡米拉卡米股份公司 | Cationic polymers for sludge dewatering |
| JP2006247630A (en) * | 2005-03-09 | 2006-09-21 | Kazuishi Satou | Waste water treating hydrophobization solid-liquid separating medium |
| WO2013064492A1 (en) * | 2011-11-04 | 2013-05-10 | Omya Development Ag | Surface -treated calcium carbonate and its use in water purification and for the dewatering of sludges and sediments |
| CN107032580A (en) * | 2017-05-23 | 2017-08-11 | 北京首创污泥处置技术股份有限公司 | A kind of sludge dewatering agent and its application method |
| CN108911476A (en) * | 2018-07-18 | 2018-11-30 | 李鹏 | A kind of sludge drying inorganic agent |
| CN110734202A (en) * | 2019-09-30 | 2020-01-31 | 哈尔滨工业大学（深圳） | river channel black and odorous bottom mud repairing and utilizing method |
| CN113800745A (en) * | 2021-09-06 | 2021-12-17 | 东莞市凯威尔环保材料有限公司 | Organic dehydrating agent for dredging sludge |
Non-Patent Citations (1)
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| 祖文萃等编: "《陈予群 中国城市生态经济理论与实践的开拓者》", 上海社会科学院出版社, pages: 233 * |
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