CN101066830A - Sludge-spraying drying process - Google Patents
Sludge-spraying drying process Download PDFInfo
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- CN101066830A CN101066830A CN 200710014655 CN200710014655A CN101066830A CN 101066830 A CN101066830 A CN 101066830A CN 200710014655 CN200710014655 CN 200710014655 CN 200710014655 A CN200710014655 A CN 200710014655A CN 101066830 A CN101066830 A CN 101066830A
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- sludge
- drying process
- constantly
- spraying
- mummification
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- Treatment Of Sludge (AREA)
- Fertilizers (AREA)
Abstract
The sludge-spraying drying process includes grinding wet sludge in a grinder, mixing with medium pressure air in a screw pump to form slurry, spraying with the spray gun and drying through mixing with hot fume in a spraying and pelletizing machine, cooling, sieving and returning fine particle to the spraying and pelletizing machine for being used as the mother material. The process is simple, and has high drying efficiency, no destruction to the organic components in sludge and no environmental pollution.
Description
Technical field
The present invention relates to a kind of sludge drying production technique.
Background technology
Along with China's rapid development of economy and urbanization process and brewage, the developing rapidly of industries such as papermaking, chemical industry, the construction of sewage work increases, the output of mud increases sharply, the processing of mud has become focus point new in the comprehensive environmental improvement with disposing.Because sludge moisture content height (generally at 75-85%), particle is thin, impurity is many, bad hydraulic permeability, to such an extent as to formed large stretch of marsh in the sludge treatment field, not only occupies the farmland, and causes new pollution.At present, the minority place adds mud fillers such as some wilkinites, wood chip and makes fertilizer and be used for the flowers and plants forest.It is with the mud landfill disposal that part of contaminated water is handled, and most of enterprise will carry out simple air storage after the sludge dewatering.As time goes on, the mud volume of cargo in storage is increasing, will take a large amount of soils.And can cause serious secondary pollution to surrounding environment, a large amount of mud have become the heavy burden of sludge treatment factory, and new pollution can be caused in the landfill zone, moreover can be fewer and feweri for the soil of landfill.
A large amount of mud that sewage work is produced have carried out harmless treatment, and the mud after handling is used for aspects such as production composite fertilizer, realize making the optimum systemic circulation of material, environment, ecology, are the problems that the present stage people demand urgently researching and solving.
Summary of the invention
The invention provides a kind of production technique of mud being carried out mummification, not only mud has been carried out harmless treatment, and be used for farm-forestry crop as fertilizer or organic-inorganic compound fertilizer, bio-fertilizer, the fertile stopping composition of BB, realize the zero release of mud factory effluent, the sludge drying processing is accomplished energy-conservation, efficient, innoxious.
The present invention is achieved through the following technical solutions:
Send in the spiral pump after by shredder impure wet mud being pulverized, slip of being got by spiral pump and middle pressure air mixed are after the spray gun atomizing, constantly be sprayed in the spray granulation drier on the material curtain of being kicked up by the rotating cylinder flight that mainly forms by interior outside returns, particle constantly forms and grows up, simultaneously with flow into spray granulation drier in hot flue gas contact, constantly moisture is removed in mummification, material after the mummification flows out and cools off through afterbody discharging end socket, finished product enters feed bin after sieving, and fine particle returns spray granulation drier as masterbatch (base nuclear) granulation again.
The water content of wet mud is 75-85%.
The present invention makes slip to mud earlier, enters spray granulation drier by whitewashing and carries out granulation and drying, and carry out purifying treatment with exhaust gas processing device, can not cause secondary environmental pollution, and technological operation is simple, and mummification efficient height can keep the organic composition in the primary sludge not to be destroyed.
Embodiment
Below the present invention is described further:
Earlier the mud about water content 75%-85% is pulverized the right charging feed feed bin in back by shredder with grit things such as impurity in the mud such as stone, husky rock, fragments of brick, in the worm conveyor feeding spiral pump of back by raw material feed bin feed bin below, during producing, air compressor machine press air to store by gas-holder.Middle binder slurry of getting by spiral pump and middle pressure air mixed from gas-holder, after the spray gun atomizing, form whitewashing, whitewashing constantly is sprayed in the spray granulation drier on the material curtain of being kicked up by the rotating cylinder flight that is mainly formed by interior outside returns by the whitewashing pipeline, particle constantly forms and grows up, the hot flue gas that forms in hotblast stove simultaneously flows into spray granulation drier by hotflue, with during hot flue gas fully contacts, moisture is removed in the continuous mummification of particle.Granule materials after the mummification draws off and is delivered in the cooler by utility appliance through the discharging end socket of spray granulation drier afterbody and cools off, cooled granule materials is delivered in the roller grizzly extension set by utility appliance and is sieved, sieve qualified granule materials and enter feed bin as finished product, pack after metering, underproof fine particle returns spray granulation drier and carries out the granulation mummification as masterbatch (base nuclear) again.
The waste gas that spray granulation drier and cooler produce in the granulating and drying process enters and enters tornado dust collector behind the dust settling chamber and carry out the elite dedusting, and the waste gas after the processing is discharged by chimney by blower fan.
The dewatered sludge finished product can be used to produce compound manure, and it mixes in mixer with powder NPK after pulverizing by pulverizer, machines through technical process such as granulation, oven dry, coolings.
Claims (2)
1, a kind of sludge-spraying drying process, it is characterized in that, send in the spiral pump after by shredder impure wet mud being pulverized, slip of being got by spiral pump and middle pressure air mixed are after the spray gun atomizing, constantly be sprayed in the spray granulation drier on the material curtain of being kicked up by the rotating cylinder flight that mainly forms by interior outside returns, particle constantly forms and grows up, simultaneously with flow into spray granulation drier in hot flue gas contact, constantly moisture is removed in mummification, material after the mummification flows out and cools off through afterbody discharging end socket, finished product enters feed bin after sieving, and fine particle returns spray granulation drier as masterbatch granulation again.
2, sludge-spraying drying process according to claim 1 is characterized in that, the water content of wet mud is 75-85%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710014655 CN101066830A (en) | 2007-05-18 | 2007-05-18 | Sludge-spraying drying process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710014655 CN101066830A (en) | 2007-05-18 | 2007-05-18 | Sludge-spraying drying process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101066830A true CN101066830A (en) | 2007-11-07 |
Family
ID=38879553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710014655 Pending CN101066830A (en) | 2007-05-18 | 2007-05-18 | Sludge-spraying drying process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101066830A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417923A (en) * | 2015-12-16 | 2016-03-23 | 普利资环境科技（苏州）有限公司 | Sludge drying system |
| CN105668986A (en) * | 2016-04-01 | 2016-06-15 | 苏州绿地土壤修复科技有限公司 | Sludge dewatering and drying treatment system and method |
| CN105712607A (en) * | 2016-04-28 | 2016-06-29 | 湖南科技大学 | Spraying granulation refrigeration vacuum drying device and method for sludge |
| CN110642544A (en) * | 2019-10-28 | 2020-01-03 | 湖北大学 | Method for rapidly preparing lightweight aggregate by using dredged sludge |
| CN113636736A (en) * | 2021-06-30 | 2021-11-12 | 武汉钢铁有限公司 | Sludge treatment system and method |
-
2007
- 2007-05-18 CN CN 200710014655 patent/CN101066830A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417923A (en) * | 2015-12-16 | 2016-03-23 | 普利资环境科技（苏州）有限公司 | Sludge drying system |
| CN105668986A (en) * | 2016-04-01 | 2016-06-15 | 苏州绿地土壤修复科技有限公司 | Sludge dewatering and drying treatment system and method |
| CN105668986B (en) * | 2016-04-01 | 2018-08-24 | 苏州绿地土壤修复科技有限公司 | A kind of drying sludge dehydration system and method |
| CN105712607A (en) * | 2016-04-28 | 2016-06-29 | 湖南科技大学 | Spraying granulation refrigeration vacuum drying device and method for sludge |
| CN105712607B (en) * | 2016-04-28 | 2019-04-16 | 湖南科技大学 | A kind of the spraying granule vacuum freeze-drying apparatus and method of sludge |
| CN110642544A (en) * | 2019-10-28 | 2020-01-03 | 湖北大学 | Method for rapidly preparing lightweight aggregate by using dredged sludge |
| CN110642544B (en) * | 2019-10-28 | 2022-01-28 | 湖北大学 | Method for rapidly preparing lightweight aggregate by using dredged sludge |
| CN113636736A (en) * | 2021-06-30 | 2021-11-12 | 武汉钢铁有限公司 | Sludge treatment system and method |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |