CN101830621B - Sewage and sludge drying and fueling treatment system and process - Google Patents
Sewage and sludge drying and fueling treatment system and process Download PDFInfo
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- CN101830621B CN101830621B CN2010101504182A CN201010150418A CN101830621B CN 101830621 B CN101830621 B CN 101830621B CN 2010101504182 A CN2010101504182 A CN 2010101504182A CN 201010150418 A CN201010150418 A CN 201010150418A CN 101830621 B CN101830621 B CN 101830621B
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- 239000010802 sludge Substances 0.000 title claims abstract description 56
- 238000001035 drying Methods 0.000 title abstract description 42
- 238000000034 method Methods 0.000 title abstract description 8
- 230000008569 process Effects 0.000 title abstract description 4
- 239000010865 sewage Substances 0.000 title abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000000446 fuel Substances 0.000 claims description 21
- 239000010801 sewage sludge Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Solid Fuels And Fuel-Associated Substances (AREA)
- Treatment Of Sludge (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a sewage and sludge drying and fueling treatment system and a corresponding process thereof. The system comprises a primary paddle drier and a secondary paddle drier, wherein a sludge pump is connected with the material inlet of the primary paddle drier through a pipeline; the material outlet of the primary paddle drier is connected with the material inlet of the secondary paddle drier, and the outlet of the secondary paddle drier is provided with a material separating insert plate and connected with a back mixing device. The process comprises the following steps of: a, conveying sludge to the primary paddle drier, wherein the rotational speed of the primary paddle drier is 2.5 to 3.5rpm, the pressure of steam is 0.45 to 0.55MPa, the temperature of the steam is 160to180 DEG C and the drier has slight negative pressure of -500 to -800Pa; b, conveying the sludge to the secondary paddle drier for continuous drying, wherein the rotational speed of the secondary paddle drier is 30 to 38Hz, namely 8 to 10rpm, the pressure of steam is 0.55 to 0.65MPa, the temperature of the steam is 160 to 180 DEG C and the whole drying system has slight negative pressure of -600to -800Pa; and c, automatically returning 30 to 50 percent of the dry sludge from the secondary paddle drier to the primary paddle drier by using the back mixing device and drying the dry sludge with the newly added sludge. The whole system can obviously reduce the seizure phenomenon and improve the thermal efficiency by artfully using two paddle driers of which blades are in different angles and the back mixing device.
Description
Technical field
The present invention relates to a kind of system and corresponding technology thereof that sludge drying, turning sludge into fuel are handled, system and drying method thereof that especially a kind of municipal sludge mummification, turning sludge into fuel are handled.
Background technology
In the city produces and lives; Produce various wastes such as industrial refuse and domestic refuse through regular meeting; Wherein in the process that sewage is handled, can produce a large amount of mud, along with the development of domestic WWT cause; Sewage Plant always handles the water yield and degree of treatment will constantly enlarge and improve, and the sludge quantity of generation also increases day by day, and in sewage sludge; Except containing a large amount of organism and nutritive substances such as abundant nitrogen, phosphorus, also there are hazardous and noxious substances such as heavy metal, pathogenic bacterium and parasite, thereby for preventing that its pollution from need carry out secondary treatment to it.For reducing the generation of polluting and exempting greenhouse gases; Can mud be turned waste into wealth; It is carried out drying and other treatment and makes it to become utilizable fuel; Its main method is burnt with the coal dust doping for municipal sludge being cured at 30% o'clock delivering in the boiler of power plant, and its calorific value can reach 2500 kilocalories-3400 kilocalorie/kilogram, and promptly two ton 30% mud can be used as the calorific value of one ton of coal.The general process of handling mud is for to carry out mummification, dehydration to it; But the mummification of mud is disposed exists energy consumption high all the time; Steam consumption and with the big shortcoming of the electric consumption; And mud occurred the stuck phenomenon of seize easily at moisture 45～50% o'clock be thereby that mud viscosity when water cut drops to a certain degree increases to cause and stirs difficulty, make this technological performance be difficult to obtain the effect of anticipation.
Summary of the invention
Technical problem to be solved by this invention provides a kind of municipal sludge mummification, turning sludge into fuel treatment system, the blade construction of adjustment drying machine, and provide a kind of drying process, to solve existing system fluctuation of service, the problem that dewatering efficiency is low.
Sewage sludge mummification turning sludge into fuel treatment system; Comprise one-level paddle drying machine and secondary paddle drying machine; Sludge pump is connected with the opening for feed of one-level paddle drying machine through pipeline; The discharge port of one-level paddle drying machine connects the feeding mouth of secondary paddle drying machine, and there is a sub-material plate in secondary paddle drying machine exit and links to each other with the back-mixing device.
The discharge port of said one-level paddle drying machine does not link to each other with the feeding mouth of secondary paddle drying machine through there being the axle conveyer, and the sludge pump 2 that links to each other with pipeline links to each other with high hopper, and the sludge pump 3 that links to each other with pipeline links to each other with the low level feed bin.
A kind ofly utilize municipal sludge mummification turning sludge into fuel treatment system according to the invention that mud is carried out the technology of drying and other treatment, may further comprise the steps:
A. the mud of moisture 70%-85% is delivered to one-level paddle drying machine through sludge pump from opening for feed, when the flow of sludge pump was 1100kg/h, the rotating speed of the two plate blade dryers of one-level was transferred to 2.5～3.5 rev/mins.That steam uses is 0.45～0.55MPa, and temperature is 160～180 ℃, whole anhydration system be with slightly negative pressure-500～-800Pa;
B. the mud in the one-level paddle drying machine is delivered to and continued drying in the secondary paddle drying machine; The rotating speed of the two plate blade dryers of secondary is controlled at 30～38 hertz; Promptly 8～10 rev/mins is three times of one-level blade dryer, and that steam uses is 0.55～0.65MPa; Temperature is 160～180 ℃, whole anhydration system be with slightly negative pressure-600～-800Pa;
C. will be back to the one-level blade dryer automatically and carry out the mummification operation in the lump through the back-mixing device through the 30-50% in the dried dried mud of secondary paddle drying machine with initiate mud.
Wherein, through Shaftless screw conveyor the mud in the one-level paddle drying machine is delivered to continuation drying in the secondary paddle drying machine among the step b, through cooling tower it is handled simultaneously when secondary paddle drying machine carries out mummification to mud.
The mummification turning sludge into fuel method of disposal that the present invention adopts new mud to combine with 50% dried mud back-mixing technology; Utilize two two plate blade dryer blade angles different cleverly; Be the two plate paddle dryer fin angles of one-level than the two plate paddle of secondary drying machine greatly; And the method for the rotating speed slow 1/3rd of the two plate paddle drying machine twin shafts of rotating ratio secondary of the two plate paddle drying machine twin shafts of one-level; Effectively utilize the velocity contrast of two machines, it is excessive to overcome mud viscosity when 45-55%, thereby produces the shortcoming of seize phenomenon.Improve the heating surface renewal speed in addition again greatly, strengthened heat transfer.Paddle drying machine mummification efficient than traditional is higher.Show according to test result; Domestic sludge mummification turning sludge into fuel with moisture 80% is disposed and is the dewatered sludge of moisture 25-30%; The calorific value of dewatered sludge reaches 2500-3400 kilocalorie/kilogram through repeatedly testing; Promptly the calorific value of two tons of dewatered sludges can be worked as the calorific value of one ton of standard coal equivalent, compare original treatment system and method, and its thermo-efficiency has improved 30-40%.
Description of drawings
Fig. 1 is the structural representation of municipal sludge mummification turning sludge into fuel treatment system according to the invention;
Fig. 2 is the structural representation of blade dryer according to the invention.
Embodiment
Embodiment one
Like Fig. 1; Shown in 2, municipal sludge mummification turning sludge into fuel treatment system of the present invention, its structure comprise one-level paddle drying machine 1 and secondary paddle drying machine 7; Sludge pump 2 is connected with the opening for feed 5 of one-level paddle drying machine 1 through pipeline 4; The discharge port 6 of one-level paddle drying machine 1 connects the feeding mouth 8 of secondary paddle drying machine 7, and secondary paddle drying machine 8 links to each other with back-mixing device 10, and the discharge port 6 of said one-level paddle drying machine 1 does not link to each other with the feeding mouth 8 of secondary paddle drying machine 7 through there being axle conveyer 9; Sludge pump 2 links to each other with high hopper 11, and sludge pump 3 links to each other with low level feed bin 13.
Two plate blade dryers 1, heat interchanging area are 50m
2, the blade angle of diaxon is 3 °, as the one-level desiccation apparatus of this mummification turning sludge into fuel apparatus system.The device level is installed (this equipment).
Two plate blade dryers 2, heat interchanging area are 20m
2, the blade angle of diaxon is 0 °, as the secondary desiccation apparatus of this mummification turning sludge into fuel apparatus system.
Be arranged in parallel one-level desiccation apparatus and secondary desiccation apparatus and connect with Shaftless screw conveyor; Again in the 2nd grade of desiccation apparatus product dewatered sludge exit, ingenious design a kind of the part of product dewatered sludge through lift with have screw conveyor shaft to send the device of one-level desiccation apparatus ingress back to.
When the flow of sludge pump was 1100kg/h, the rotating speed of the two plate blade dryers of one-level was transferred to 2.5 rev/mins.That steam uses is 0.55MPa, and temperature is 160 ℃, and whole anhydration system is with negative pressure-500Pa slightly, so there is not stink from leakage, also helps moisture evaporation in the mud.
After sludge pump is carried 150 minutes, the effect with outlet two-stage baffle plate of the two plate blade dryers of one-level, and blade structure singularity through the middle part; Mud is alternately received extruding and lax in blade and axial drying process, strengthened drying efficiency, during diaxon anti-phase rotation simultaneously; The staggered rotation of blade anti-phase has self-cleaning effect, and heating surface is brought in constant renewal in; Strengthened heat transfer, overcome mud again moisture 45% o'clock easy seize stuck phenomenon.1 grade of two plate blade dryer outlet semi-dry sludge water ratio is controlled between 40～48%.
After 1 grade of sufficient mummification, moisture 40～48% semi-dry sludge is delivered to secondary mummification turning sludge into fuel device smoothly by Shaftless screw conveyor and is continued mummification.The rotating speed of the two plate blade dryers of secondary is controlled at 30 hertz, and promptly 10 rev/mins is three times of the two plate blade dryers of one-level, and that steam uses is 0.55MPa, and temperature is 160 ℃, and whole anhydration system is with negative pressure-600Pa slightly; Can overcome the generation of two plate blade dryers obstructions and seize stuck phenomenon through combining at a slow speed, fast, can bring into play the efficient of conducting heat separately again, make the two plate blade dryers of secondary go out dry mud water ratio between 25～30%.
The outlet of secondary mummification fuel-device has one to regulate sub-material plate and an adjustable back-mixing device; Can automatically return to one-level mummification turning sludge into fuel device portal to 30～50% of the dried mud of the finished product mixes with 80% wet mud; After mixed moisture percentage in sewage sludge is improved; The heat transfer contact area of mud and blade, blades axes, hot wall increases greatly, with and improve heat transfer efficiency greatly, played the effect that art is good for strength; In addition, the water vapour of system evaporation blows through blower fan and delivers to treatment system so that waste gas is in time handled after adding water cooling to the cooling tower.
Embodiment two
Two plate blade dryers 1, heat interchanging area are 40m
2, the blade angle of diaxon is 6 °, two plate blade dryer 2 heat exchange, and area is 25m
2, the blade angle of diaxon is 2 °, as the secondary desiccation apparatus of this mummification turning sludge into fuel apparatus system; The rotating speed of the two plate blade dryers of one-level is transferred to 3.5 rev/mins.That steam uses is 0.55MPa, and temperature is 180 ℃, and whole anhydration system is with negative pressure-600Pa slightly; The rotating speed of the two plate blade dryers of secondary is controlled at 30 hertz, and promptly 10 rev/mins, that steam uses is 0.55MPa, and temperature is 180 ℃, and whole anhydration system is with negative pressure-800Pa slightly.All the other are identical with embodiment one.
Claims (5)
1. sewage sludge mummification turning sludge into fuel treatment system; It is characterized in that: sludge pump (2) is connected with the opening for feed (5) of one-level blade dryer (1) through pipeline (4); The discharge port (6) of one-level blade dryer (1) connects the feeding mouth (8) of secondary blade dryer; There is a sub-material plate in the exit (12) of secondary blade dryer (7), and links to each other with back-mixing device (10); The blade (16) of the middle screw shaft (15) of one-level blade dryer (1) is 2 °-6 ° with the planar angle perpendicular to axle; The blade (16) of the middle screw shaft (15) of secondary blade dryer (7) is 0 °-2 ° with the planar angle perpendicular to axle.
2. according to the said sewage sludge mummification of claim 1 turning sludge into fuel treatment system, it is characterized in that: the discharge port (6) of one-level blade dryer (1) does not link to each other with the feeding mouth (8) of secondary blade dryer (7) through there being axle conveyer (9).
3. according to the said sewage sludge mummification of claim 1 turning sludge into fuel treatment system; It is characterized in that: sludge pump (2) links to each other with high hopper (11), and sludge pump (3) links to each other with low level feed bin (13) and is connected with the opening for feed (5) of one-level blade dryer (1) through pipeline (4).
4. according to the said sewage sludge mummification of claim 1 turning sludge into fuel treatment system, it is characterized in that: described back-mixing device (10) is for lift or screw conveyor shaft is arranged.
5. according to the said sewage sludge mummification of claim 2 turning sludge into fuel treatment system, it is characterized in that: cooling tower (14) links to each other with one-level blade dryer (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101504182A CN101830621B (en) | 2010-04-13 | 2010-04-13 | Sewage and sludge drying and fueling treatment system and process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101504182A CN101830621B (en) | 2010-04-13 | 2010-04-13 | Sewage and sludge drying and fueling treatment system and process |
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| CN101830621A CN101830621A (en) | 2010-09-15 |
| CN101830621B true CN101830621B (en) | 2012-05-30 |
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| CN2010101504182A Active CN101830621B (en) | 2010-04-13 | 2010-04-13 | Sewage and sludge drying and fueling treatment system and process |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107954585A (en) * | 2017-11-27 | 2018-04-24 | 江苏理工学院 | A kind of domestic sludge assists coal desiccation molding machine |
| CN108362118B (en) * | 2018-02-01 | 2020-07-14 | 同济大学 | Drying equipment and drying method for polyaluminium chloride series salts |
| CN110002707A (en) * | 2019-04-18 | 2019-07-12 | 苏州草宝能源科技有限公司 | A kind of multistage technique for being heat-treated dry sludge |
| CN110002708A (en) * | 2019-04-18 | 2019-07-12 | 苏州草宝能源科技有限公司 | A kind of pyrolyzing sludge dehydration and drying processing burning disposing technique |
| CN110950515A (en) * | 2019-12-25 | 2020-04-03 | 深圳市能源环保有限公司 | Half-dry sludge conveying system with matching device |
| WO2021128107A1 (en) * | 2019-12-25 | 2021-07-01 | 深圳市能源环保有限公司 | Semi-dry sludge conveying system with intermixing device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2767435Y (en) * | 2005-02-03 | 2006-03-29 | 浙江大学 | Three-step low-temperature sludge drying and granulating system |
| CN1843985A (en) * | 2005-04-08 | 2006-10-11 | 兰州瑞德干燥技术有限公司 | Method for drying sludge by blade drier |
| CN100351188C (en) * | 2005-12-14 | 2007-11-28 | 上海金州环境工程有限公司 | Sludge anhydration and burning process, and its systematic device |
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Inventor after: Chen Yongxi Inventor after: Lai Youxian Inventor after: Ma Xiang Inventor after: Tang Lihua Inventor before: Chen Yongxi Inventor before: Yang Guolu Inventor before: Li Peisheng Inventor before: Lai Youxian Inventor before: Ma Xiang Inventor before: Tang Lihua |
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Denomination of invention: Sewage and sludge drying and fueling treatment system and process Effective date of registration: 20190108 Granted publication date: 20120530 Pledgee: Bank of China, Limited by Share Ltd, Guangzhou, Panyu branch Pledgor: Guangzhou Luojia Enviromental Technology Co., Ltd. Registration number: 2019440000009 |
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Date of cancellation: 20200904 Granted publication date: 20120530 Pledgee: Bank of China Limited by Share Ltd. Guangzhou Panyu branch Pledgor: GUANGZHOU LUOJIA ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Registration number: 2019440000009 |
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Denomination of invention: Sewage sludge drying and fuel treatment system and technology Effective date of registration: 20200909 Granted publication date: 20120530 Pledgee: Bank of China Limited by Share Ltd. Guangzhou Panyu branch Pledgor: GUANGZHOU LUOJIA ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Registration number: Y2020440000254 |
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