CN103723999A - Method for preparing flower ceramic particles with urban water supply sludge - Google Patents
Method for preparing flower ceramic particles with urban water supply sludge Download PDFInfo
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- CN103723999A CN103723999A CN201310662703.6A CN201310662703A CN103723999A CN 103723999 A CN103723999 A CN 103723999A CN 201310662703 A CN201310662703 A CN 201310662703A CN 103723999 A CN103723999 A CN 103723999A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
A method for preparing flower ceramic particles with urban water supply sludge belongs to the field of environmental technology, and relates to the resource utilization of solid waste. Materials accounted by dry weight rate, including 30-50 percent of water supply sludge, 10-30 percent of coal slurry, 20-30 percent of flint clay, 5-7 percent of Chinese chestnut shell, 8-10 percent of waste glass and the like, are dried, grinded, mixed and uniformly agitated to be prepared into spheres 6-15 mm in particle diameter. The spheres are subjected to pre-heating torrefaction and cooling so as to form the high performance flower ceramic particles. The ceramic particles prepared by the method are light and have loose and porous surfaces, can absorb a considerable amount of water, and has proper ability to keep nutritious substances. Compared with soilless substrates such as sand and wood chips, the flow ceramic particles have the characteristics of cleanness, neatness, attractiveness in shape, lightness, no pollution, cleanable performance, durability, higher stability in chemical property and the like.
Description
Technical field
The present invention is a kind of method of utilizing city water firing sludge high-performance flower ceramsite, belongs to environmental technology field.
Background technology
City water factory, when producing tap water, has also produced a large amount of mud.This part mud derives from filtering thing and the throw out producing in purificating raw water process, account for total water purification amount 4% ?7%, comprising suspended substance and the organism after concentrated, and remain in the coagulating agent in mud.Compare with sewage sludge, give coliform count in sewage sludge seldom, heavy metal content is also lower, has reduced the environmental threat that exceeds standard and bring due to bacterium and heavy metal contaminants.Seriously in short supply in current water resources, in the day by day serious situation of water environment pollution, for China, there is the more than 95% undressed present situation of sludge water condition in waterworks when precontract, the significance of sludge disposal is more and more subject to people's attention.
To for Chinese garden planting, be a kind of promising disposal options to sewage sludge at present, but due to higher to aluminium content in sewage sludge, can affect absorption and the metabolism of plant nutrient ingredient, so should use, still there is certain limitation.Water supply plant dewatered sludge is mainly by Fe
2o
3, Al
2o
3, SiO
2, the clay mineral such as CaO, MgO becomes to be grouped into, its character is similar to clay, has plasticity-, coking property, thermotolerance and adsorptivity.Be SiO
2content is on the low side, and plasticity-is not high enough, if replace clay to fire goods, can consider to add a certain amount of binding agent to improve plasticity-.Traditional flower ceramsite mainly be take leca as main, with replace clay to make haydite to sewage sludge, can not only change by the disease of spraining of making grain with local methods, dispose a large amount of mud it is innoxious simultaneously, and realized recycling, catered to the direction of China's light-weight aggregate Sustainable development.
Summary of the invention
The present invention utilizes and to sewage sludge, replaces the non-renewable Mineral resources such as clay to fire flower ceramsite.Specifically comprise the following steps:
(1) get respectively and cross 90～110 mesh sieves after flint clay, chestnut shell and waste glass crushing.
(2) get coal slime and be dried at 105 ℃, after water ratio 5%～10%, ground 100 mesh sieves.
(3) to giving in sewage sludge, add amendment, after fully stirring evenly, dewater, after dehydration, water ratio is about 75%;
(4) by the above-mentioned sewage sludge of giving, coal slime, flint clay, chestnut shell and cullet are by dry weight quality percentage composition 30%～50%, 10%～30%, 20%～30%, 5%～7%, 5%～10% mixing and stirring, and natural drying is made particle diameter after 2 days be the spherical of 6～15mm;
(5) after raw material ball is at room temperature dried to 1 day, send into and in retort furnace, carry out persistently overheating roasting, whole temperature-rise period is divided into 4 stages, the temperature rise rate of first stage is 15～30 ℃/min, the temperature rise rate of subordinate phase is 3～7 ℃/min, and phase III temperature rise rate is 5～15 ℃/min, and the last stage temperature rise rate is 35～45 ℃/min, wherein front three phases respectively lasts 20min, and a rear stage is lasted 10min.In second and third stage, should adopt slow intensification, be mainly for make organism be fully oxidized with pellet body in gas get rid of completely, to prevent that in its body, air scavenge makes base substrate occur defect not in time.
(6) by taking out after the raw material ball uniform decrease in temperature to 400 after roasting ℃, obtain high performance flower ceramsite.
The amendment of step (2) is the amendment of this area routine, and as high-efficiency polymerization aluminum chloride, its consumption is dewatered sludge amount 10%.
The advantage that the present invention has is: as the raw material of manufacturing haydite, make sewage sludge harmlessness when the high-temperature roasting to sewage sludge.Heavy metal is melted material through high-temperature roasting and is wrapped in haydite inside, and because of the organic substance that contains certain thermal value again, can provide heat for high-temperature roasting in mud, reduced certain energy consumption simultaneously, both reach the recycling of offal treatment, met again the requirement that industrialization is produced.
The features such as the flower ceramsite that the present invention produces has surface irregularity, loose porous, and specific surface area is large, stable chemical nature.Haydite can be good as soilless culture substrate water conservation draining ventilation property (can embody in an embodiment), and fertilizer-preserving ability is moderate, safety and sanitation, free from extraneous odour own, seldom grow worm's ovum and pathogen, also do not discharge objectionable impurities, be applicable to the soilless culture of the decorative flowers such as family, restaurant.
Concrete implementation method
Below by specific embodiment, the present invention is done to concrete introduction, following instance does not form limitation of the invention.
Embodiment 1:
Formula and the method for utilizing feedwater firing sludge flower ceramsite, concrete grammar is as follows:
(1) the high-efficiency polymerization aluminum chloride that adds dewatered sludge amount 10% to sewage sludge dewater to water ratio be 75%; other drying and grinding of respectively preparing burden are crossed after 100 mesh sieves according to stirring than the ratio of 30%:30%:30%:5%:5% to sewage sludge, coal slime, flint clay, chestnut shell and cullet dry weight; air-dry 2 days at normal temperatures, send into the spheroidal particle that tablets press is made 10mm.
(2) after raw material ball is at room temperature dried to 1 day, send into and in retort furnace, carry out persistently overheating roasting to 1000 ℃, whole temperature-rise period is divided into 4 stages, the temperature rise rate of first stage is 20 ℃/min, the temperature rise rate of subordinate phase is 5 ℃/min, and phase III temperature rise rate is 10 ℃/min, and the last stage temperature rise rate is 40 ℃/min, wherein front three phases respectively lasts 20min, and a rear stage is lasted 10min.
(3) by taking out after the raw material ball uniform decrease in temperature to 400 after roasting ℃, obtain high performance flower ceramsite.
The outward appearance of haydite finished product is the shaggy ball-type solid of Vandyke brown, tap density be 750 ?880kg/m
3, cylindrical compress strength 7.0MPa, water-intake rate is 13.6～20.8%.
Embodiment 2
The embodiment of the present embodiment is as different from Example 1: by step 2 Raw proportioning by sewage sludge, coal slime, flint clay, chestnut shell and cullet mix and mix thoroughly than the ratio of 40%:20%:25%:5%:10% in dry weight, and other steps and parameter are identical with embodiment 1.
The outward appearance of haydite finished product is the shaggy ball-type solid of Vandyke brown, tap density be 600 ?650kg/m
3, cylindrical compress strength 6.0MPa, water-intake rate is 14.7～19.4%.
Embodiment 3
The embodiment of the present embodiment is as different from Example 1: step 2 Raw proportioning is by sewage sludge, and coal slime, flint clay, chestnut shell and cullet mix and mix thoroughly than 50%:20%:20%:5%:5% by dry weight, and other steps and parameter are identical with embodiment 1.
The outward appearance of haydite finished product is the shaggy ball-type solid of chocolate, tap density be 520 ?580kg/m
3, cylindrical compress strength is 4.5MPa, water-intake rate is 17.5～26.2%.
Claims (2)
1. utilize the method for preparing flower ceramsite to sewage sludge, it is characterized in that, comprise the following steps:
(1) get respectively and cross 90～110 mesh sieves after flint clay, chestnut shell and waste glass crushing;
(2) get coal slime and be dried at 105 ℃, after water ratio 5%～10%, ground 100 mesh sieves;
(3) to giving in sewage sludge, add amendment, after fully stirring evenly, dewater, after dehydration, water ratio is about 75%;
(4) by the above-mentioned sewage sludge of giving, coal slime, flint clay, chestnut shell and cullet are by dry weight quality percentage composition 30%～50%, 10%～30%, 20%～30%, 5%～7%, 5%～10% mixing and stirring, and natural drying is made particle diameter after 2 days be the spherical of 6～15mm;
(5) after raw material ball is at room temperature dried to 1 day, send into and in retort furnace, carry out persistently overheating roasting, whole temperature-rise period is divided into 4 stages, the temperature rise rate of first stage is 15～30 ℃/min, the temperature rise rate of subordinate phase is 3～7 ℃/min, and phase III temperature rise rate is 5～15 ℃/min, and the last stage temperature rise rate is 35～45 ℃/min, wherein front three phases respectively lasts 20min, and a rear stage is lasted 10min;
(6) by taking out after the raw material ball uniform decrease in temperature to 400 after roasting ℃, obtain high performance flower ceramsite.
2. according to the method for claim 1, it is characterized in that, amendment is high-efficiency polymerization aluminum chloride, and its consumption is dewatered sludge amount 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310662703.6A CN103723999B (en) | 2013-12-09 | 2013-12-09 | City water mud is utilized to prepare the method for flower ceramsite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310662703.6A CN103723999B (en) | 2013-12-09 | 2013-12-09 | City water mud is utilized to prepare the method for flower ceramsite |
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| CN103723999A true CN103723999A (en) | 2014-04-16 |
| CN103723999B CN103723999B (en) | 2016-01-20 |
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| CN201310662703.6A Expired - Fee Related CN103723999B (en) | 2013-12-09 | 2013-12-09 | City water mud is utilized to prepare the method for flower ceramsite |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337568A (en) * | 2017-08-25 | 2017-11-10 | 洛阳茂生生物技术有限公司 | A kind of method that the sludge substrate suitable for flower plants and nursery stock is prepared based on plant refuse |
| CN110885241A (en) * | 2018-09-07 | 2020-03-17 | 何钢 | Mullite-structure ceramic porous water storage material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148346A (en) * | 2007-09-04 | 2008-03-26 | 山东大学 | Method for preparing haydite from urban sewage plant sludge |
| CN101215150A (en) * | 2008-01-18 | 2008-07-09 | 北京工业大学 | Method for burning haydite by solid castoff |
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2013
- 2013-12-09 CN CN201310662703.6A patent/CN103723999B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148346A (en) * | 2007-09-04 | 2008-03-26 | 山东大学 | Method for preparing haydite from urban sewage plant sludge |
| CN101215150A (en) * | 2008-01-18 | 2008-07-09 | 北京工业大学 | Method for burning haydite by solid castoff |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337568A (en) * | 2017-08-25 | 2017-11-10 | 洛阳茂生生物技术有限公司 | A kind of method that the sludge substrate suitable for flower plants and nursery stock is prepared based on plant refuse |
| CN110885241A (en) * | 2018-09-07 | 2020-03-17 | 何钢 | Mullite-structure ceramic porous water storage material and preparation method thereof |
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| CN103723999B (en) | 2016-01-20 |
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Granted publication date: 20160120 Termination date: 20191209 |