CN102285786B - Process for preparing hadite by utilizing chemical residual sludge - Google Patents
Process for preparing hadite by utilizing chemical residual sludge Download PDFInfo
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- CN102285786B CN102285786B CN2011101500913A CN201110150091A CN102285786B CN 102285786 B CN102285786 B CN 102285786B CN 2011101500913 A CN2011101500913 A CN 2011101500913A CN 201110150091 A CN201110150091 A CN 201110150091A CN 102285786 B CN102285786 B CN 102285786B
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- Prior art keywords
- sludge
- hadite
- raw material
- drying
- dry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000010802 sludge Substances 0.000 title claims abstract description 40
- 239000000126 substance Substances 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 238000003889 chemical engineering Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000004927 clay Substances 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 229910021536 Zeolite Inorganic materials 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 238000010792 warming Methods 0.000 claims description 5
- 239000010457 zeolite Substances 0.000 claims description 5
- 239000010881 fly ash Substances 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 8
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 7
- 238000004064 recycling Methods 0.000 abstract description 5
- 239000002910 solid waste Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract 2
- 239000008188 pellet Substances 0.000 abstract 2
- 238000007580 dry-mixing Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 231100001261 hazardous Toxicity 0.000 abstract 1
- 230000001988 toxicity Effects 0.000 abstract 1
- 231100000419 toxicity Toxicity 0.000 abstract 1
- 238000002386 leaching Methods 0.000 description 6
- 239000010865 sewage Substances 0.000 description 5
- 238000004065 wastewater treatment Methods 0.000 description 4
- 239000002361 compost Substances 0.000 description 3
- 239000002574 poison Substances 0.000 description 3
- 231100000614 poison Toxicity 0.000 description 3
- 239000003814 drug Substances 0.000 description 2
- 239000002920 hazardous waste Substances 0.000 description 2
- 238000004382 potting Methods 0.000 description 2
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000013095 identification testing Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 210000004681 ovum Anatomy 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a recycling process of industrial solid wastes and discloses a process for baking hadite by utilizing chemical residual sludge. The process comprises the steps of firstly drying mechanically dewatered sludge, proportioning, carrying out dry mixing, adding water, uniformly stirring and mixing, granulating to obtain raw material pellets, drying the raw material pellets, and baking at the temperature of 1050-1300 DEG C to form sludge hadite. The extraction concentration of heavy metals in the hadite is far lower than GB 5085.3-2007 (Identification standards for hazardous wastes-Identification for extraction toxicity). The process provided by the invention has the advantages of low energy consumption, low production cost and significant environmental benefits and economical benefits, and develops a new way for sludge recycling treatment by waste treatment with another waste and waste recycling.
Description
Technical field
The present invention relates to a kind of disposal of resources of industrial solid castoff, be specifically related to a kind of technique of utilizing the chemical industry excess sludge to prepare haydite.
Background technology
At present, all adopt Wastewater Treated by Activated Sludge Process sewage above 90% sewage disposal in the world, in treating processes, can produce the mud that accounts for sewage volume 0.5%～1.0%.Moisture percentage in sewage sludge is high, and volume is large, and is perishable, and complicated component contains organism, pathogenic bacteria parasite (ovum) and the heavy metal etc. of chemical industry residue, harmful, difficult degradation, and processing cost is high, accounts for 40%～60% of whole sewage process operation cost.Traditional sludge is processed with disposal options such as landfill, Pai Hai, burning etc. and is all had separately pros and cons, all can cause in various degree impact to environment.Mud is carried out minimizing and resource utilization, can not only realize taking full advantage of, turning waste into wealth of material, and can promote foundation and the Sustainable development of recycling economy.Thereby, inquire into treating sludge, particularly belong to the minimizing of the chemical engineering sludge of dangerous solid waste, innoxious and resource utilization has important practical significance.
The mud of chemical industry is not only bulky, and organic poison content is high, and particle is thin, is cotton-shaped colloidal structure, has high-hydrophilic.More than 1000 of the existing big or small chemical industrial parks of China have more than 100,000 of big or small chemical enterprises.These chemical enterprises produce tens thousand of tons excess sludge every day, and the water ratio of mud is up to more than 95%, and contain various organic poisons.According to " national Hazardous Waste List " regulation of the up-to-date promulgation of China, the excess sludge that produces in the industry wastewater treatment process such as numerous petrochemical industry, medicine and agricultural chemicals is dangerous solid waste, must send the dangerous waste disposal center of qualification to focus on.
China's chemical engineering sludge generally adopts burning disposal, and the burning expense is high, and many chemical enterprises transfer to adopt landfill or compost treatment excess sludge, owing to contain a large amount of organic poisons in the mud, landfill or compost easily produce serious secondary pollution, the harm ecotope, and compost need take a large amount of farmlands.Therefore, how more effectively to dispose chemical engineering sludge, how chemical engineering sludge being turned waste into wealth is problem in the urgent need to address.At present, the mud that is used for the potting grain mainly is excess sludge and the municipal sludge that river bottom mud, sanitary sewage disposal produce, and rarely has report with the research of chemical engineering sludge potting grain.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of technique of utilizing the chemical industry excess sludge to prepare haydite is provided, realize the recycling sludge utilization.
Technical scheme of the present invention is: a kind of technique of utilizing the chemical industry excess sludge to prepare haydite, and its concrete steps are as follows:
(1), dry chemical engineering sludge behind mechanical dehydration, obtain dewatered sludge;
(2), in above-mentioned mud, add auxiliary material, stirring and evenly mixing obtains dry blend,
(3), to add water to the quality water ratio in the dry blend be 5～15%, the restir mixing;
(4), granulation makes raw material ball;
(5), dry raw material ball;
(6), with 10～30 ℃/min temperature rise rate, be warming up to 1050～1300 ℃, sintering 10～20min; After the cooling, namely get haydite.
The quality water ratio of above-mentioned chemical engineering sludge behind mechanical dehydration is generally 70～85%.
Drying temperature is 105～120 ℃ in the preferred steps (1), and be 4～24h time of drying; Drying temperature in the step (5) is 80～105 ℃, and be 4～24h time of drying.
Preferred described auxiliary material be in flyash, clay or the zeolite powder any one, any two kinds or any three kinds; Auxiliary material accounts for 40～70% of dry blend total mass, and dewatered sludge accounts for 30～60% of dry blend total mass.
The prepared haydite of the present invention has lightweight, high strength, has certain characteristics such as specific surface area concurrently, can be widely used in the Industrial Wastewater Treatment.
Beneficial effect:
Compare with the traditional sludge treatment process, have following advantage:
1, prepares haydite take the chemical industry dewatered sludge as raw material, broken through traditional ceramsite preparation process take clay, shale etc. as main raw material, also opened up the new way that solid waste is processed simultaneously.
2, prepared haydite can be widely used in wastewater treatment and the restoration of the ecosystem, has reached " turning waste into wealth ", " treatment of wastes with processes of wastes against one another " purpose, has good environmental benefit, Social benefit and economic benefit.
3, behind the high temperature sintering, the organism in the mud can obtain permineralization, and the Leaching of Heavy Metals concentration of haydite is far below the leach liquor maximum permissible concentration of the middle regulation of GB GB 5085.3-2007 (Hazardous wastes judging standard leaching characteristic identification).
Embodiment
Mud is all taken from the excess sludge of chemical industry garden, Jiangsu composite wastewater treatment plant after the belt press filtration, and the quality water ratio is 75～85%, and many chemical enterprises such as insecticide factory, petrochemical plant, Medicine Factory are arranged in this chemical industrial park.
Embodiment 1:
Get the quality water ratio and be this excess sludge of 75%, 110 ℃ of dry 10h; Get respectively dewatered sludge 50g, clay 30g, flyash 10g, zeolite powder 10g, drop into respectively the batch mixing basin, fully behind the stirring and evenly mixing, add water, to the quality water ratio be 12%, granulation behind the stirring and evenly mixing gets raw material ball; Raw material ball behind 80 ℃ of dry 12h, with the temperature rise rate of 15 ℃/min, is warming up to 1250 ℃, sintering 15min; After the cooling, namely get haydite.After tested, its tap density is 0.87g/cm
3, cylindrical compress strength is 3.83MPa, its Leaching of Heavy Metals test-results sees Table 1.
Embodiment 2:
Get the quality water ratio and be this excess sludge of 80%, 120 ℃ of dry 4h; Get respectively dewatered sludge 40g, clay 20g, zeolite powder 20g, drop into respectively the batch mixing basin, abundant stirring and evenly mixing, adding water management quality water ratio is 10%, granulation behind the stirring and evenly mixing gets raw material ball; Raw material ball behind 100 ℃ of dry 6h, with 25 ℃/min temperature rise rate, is warming up to 1200 ℃, sintering 12min; After the cooling, namely get haydite, after tested, its tap density is 0.85g/cm
3, cylindrical compress strength is 4.4MPa, its Leaching of Heavy Metals test-results sees Table 1.
Embodiment 3:
Get the quality water ratio and be this excess sludge of 85%, 105 ℃ of dry 24h; Get respectively dewatered sludge 35g, clay 20g, flyash 25g, zeolite powder 20g drops into respectively the batch mixing basin, abundant stirring and evenly mixing, and adding water management quality water ratio is 8%; , granulation behind the stirring and evenly mixing gets raw material ball; Raw material ball behind 105 ℃ of dry 4h, with the temperature rise rate of 30 ℃/min, is warming up to 1150 ℃, sintering 10min; After the cooling, namely get haydite.After tested, its tap density is 0.89g/cm
3, cylindrical compress strength is 4.0MPa, its Leaching of Heavy Metals test-results sees Table 1.
Analysis of Heavy Metals in the table 1 haydite leaching characteristic identification test leach liquor
Claims (2)
1. technique of utilizing the chemical industry excess sludge to prepare haydite, its concrete steps are as follows:
⑴, dry chemical engineering sludge behind mechanical dehydration obtain dewatered sludge;
⑵, add auxiliary material in above-mentioned mud, stirring and evenly mixing obtains dry blend, described auxiliary material be in flyash, clay or the zeolite powder any one, any two kinds or any three kinds; Auxiliary material accounts for 40～70% of dry blend total mass, and dewatered sludge accounts for 30～60% of dry blend total mass;
⑶, to add water to the quality water ratio in the dry blend be 5～15%, the restir mixing;
⑷, granulation make raw material ball;
⑸, dry raw material ball;
, with 10～30 ℃/min temperature rise rate, be warming up to 1050～1300 ℃, sintering 10～20min; After the cooling, namely get haydite.
2. technique according to claim 1 is characterized in that drying temperature is 105～120 ℃ in the step (1), and be 4～24h time of drying; Drying temperature in the step (5) is 80～105 ℃, and be 4～24h time of drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101500913A CN102285786B (en) | 2011-06-03 | 2011-06-03 | Process for preparing hadite by utilizing chemical residual sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101500913A CN102285786B (en) | 2011-06-03 | 2011-06-03 | Process for preparing hadite by utilizing chemical residual sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102285786A CN102285786A (en) | 2011-12-21 |
| CN102285786B true CN102285786B (en) | 2013-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101500913A Expired - Fee Related CN102285786B (en) | 2011-06-03 | 2011-06-03 | Process for preparing hadite by utilizing chemical residual sludge |
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| Country | Link |
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| CN (1) | CN102285786B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826830B (en) * | 2012-09-06 | 2014-11-26 | 金立虎 | Stale refuse plastic sludge sand and fly ash ceramsite and manufacturing method thereof |
| CN103224385B (en) * | 2013-03-19 | 2014-10-29 | 南京工业大学 | Technology for preparing filler through blending chemical sludge burning ash with inorganic heavy metal stabilizer |
| CN103145442B (en) * | 2013-03-28 | 2014-07-16 | 南京工业大学 | Method for preparing non-sintered ceramisites by using chemical sludge |
| CN104844044B (en) * | 2014-09-28 | 2017-02-01 | 王江豪 | Manufacturing method of ceramsite enhanced foam concrete self-insulation building block |
| CN104446359A (en) * | 2014-11-24 | 2015-03-25 | 南京工大环境科技有限公司 | Method for preparing ultra-light filler by using chemical excess sludge |
| CN105084658A (en) * | 2015-08-11 | 2015-11-25 | 常州大学 | Waste water treatment system for water-based ink |
| CN106220012B (en) * | 2016-07-06 | 2018-11-13 | 南京工业大学 | A kind of method that fluorine-containing sludge prepares light-weight aggregate |
| CN106995306B (en) * | 2017-05-17 | 2020-11-03 | 云南大学 | Method for firing ceramsite by using activated sludge |
| CN108147781A (en) * | 2017-12-22 | 2018-06-12 | 中建八局第建设有限公司 | A kind of bed-silt sintering ceramsite and preparation method thereof |
| CN114409377A (en) * | 2022-02-17 | 2022-04-29 | 天津科技大学 | Method for preparing ceramsite by using chromium-containing sludge |
| CN114751722A (en) * | 2022-04-27 | 2022-07-15 | 大唐同舟科技有限公司 | Method for preparing ceramsite filter material by synergistic utilization of solid waste |
Citations (1)
| 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 |
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Patent Citations (1)
| 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 |
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| CN102285786A (en) | 2011-12-21 |
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