CN104628237B - Sludge drying incineration system based on thermal power plant - Google Patents
Sludge drying incineration system based on thermal power plant Download PDFInfo
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- CN104628237B CN104628237B CN201510034560.3A CN201510034560A CN104628237B CN 104628237 B CN104628237 B CN 104628237B CN 201510034560 A CN201510034560 A CN 201510034560A CN 104628237 B CN104628237 B CN 104628237B
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
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Abstract
The invention discloses a sludge drying incineration system based on a thermal power plant. The system comprises a sludge drying system and a sludge mixing incineration system, wherein the sludge drying system comprises a heat supply system, a feeding system, a paddle type sludge dryer, a dead steam treating system, a dead steam recycling system and a dried sludge collecting and handling system; and the sludge mixing incineration system comprises a dried sludge mixing system and a dried sludge incineration system. According to the sludge drying incineration system based on the thermal power plant, sludge is dried through high-temperature steam produced by a boiler of the thermal power plant; the dried sludge is incinerated and the resulting heat is used for producing steam; the whole process is free of pollutant; therefore, an effective way is actually developed for recycling the wastes and treating wastes with the wastes, the social and environmental benefits are obvious, and a feasible way is provided for harmless handling, reducing handling and recycling of sludge.
Description
Technical field
The present invention relates to a kind of sludge treating system of field of Environment Protection, specifically one kind utilize steam power plant's steam and electricity
The sludge drying and incineration system of factory's boiler.
Background technology
In recent years, with the development of Chinese society economy and urbanization, municipal sewage is on the increase, and mud is as sewage
How side-product after process, process and become a great problem that today's society faces.According to statistics, to 2010, national cities and towns
Sewage treatment plant reaches 2840, and the statistical data of 2013 shows at present 3600.The year of these sewage treatment plants is processed
Sewage quantity can reach 344 billion cubic meters.And often process 10,000 tons of sewage and will produce 5 tons of mud, i.e. the sewage of 344 billion cubic meters
20,000,000 tons of mud probably can be produced, but be off 2010, China's sewage sludge harmlessness handling rate is less than 25%.
Firmly build within 2011 portion and the Committee of Development and Reform combines and prints and distributes《Urban wastewater treatment firm specific resistance to filtration technical manual（Examination
OK）》In specifically mention " Treatment of Sludge should preferentially utilize local cement or thermoelectricity industry kiln resource ", reduce specific resistance to filtration
The construction investment of facility.Wherein, using steam power plant's cooperative disposal mud, both can by the use of steam power plant enrich steam resource as
Mummification thermal source, can utilize the existing boiler of steam power plant and advanced exhaust steam processing system again, reduce investment outlay and operating cost.
Practice have shown that, sludge drying is the committed step realizing sewage sludge harmlessness, minimizing and disposal of resources.At present,
, through mechanical dehydration, moisture content, will far from the moisture content reaching sludge incineration typically 70% about for the mud of sewage treatment plant
Ask.According to traditional sludge drying granulating system although moisture content can reach less than 20%, but cost is often higher.Cause
This, sewage sludge harmlessness processes to dispose still shoulders heavy responsibilities.
Content of the invention
The technical problem to be solved it is simply that provide a kind of rely on steam power plant sludge drying and incineration system, be
The innoxious, minimizing of mud and disposal of resources provide one not only to meet sludge incineration water content requirement but also lower-cost can
Walking along the street footpath.
The present invention solves its technical problem by following technical solution：
A kind of sludge drying and incineration system relying on steam power plant, described steam power plant includes starting trouble and station boiler
1, it is characterized in that：The superheated steam that described station boiler 1 produces is sequentially connected steam turbine 2, starting trouble auxiliary steam through pipeline
Pipeline and a steam header 3, described system includes paddle type sludge dryer 4 and the auger type charger feeding to it
With the finished product mud collection device 6 collecting its finished product mud；
Described paddle type sludge dryer 4 is that the dewatered sludge after the completion of steam is not directly contacted with, is dried with mud contains
Water rate, in 50% about type, is distributed with steam inlet, exhaust steam on its fuselage（Discharge the steam of heat, major part is condensed into water）
Outlet, mud import, sludge outlet and mud waste gas outlet：
Described steam inlet is provided with the pipeline described steam header 3 of connection, exhaust steam outlet is then sequentially provided with pipeline through water
Pump 10 connects to be imported and exported and connects described auger type charger and finished product mud collection dress respectively to described water dust scrubber 8, mud
Put 6, mud waste gas outlet and be provided with pipeline and be sequentially connected cyclone separator 7/ water dust scrubber 8 and described steam power plant station boiler 1
Air-introduced machine, the outfall of described water dust scrubber 8 is provided with pipeline and connects to described station boiler 1.
Described system also includes dewatered sludge and collects and disposal system, and it includes collecting the dewatered sludge of drying machine outlet
Dewatered sludge storehouse 11, conveying machinery（16）（As power plant's transport vehicle）, coal yard（13）Mixed coal device and coal conveyer belt（14）.
Described dewatered sludge is collected and disposal system also includes power plant coal.
The exhanst gas outlet of existing boiler of power plant 1 has pipeline to connect to power-plant flue gas processing system 15（Including desulfurization out of stock,
Flue gas ash removal etc.）, the lime-ash of boiler of power plant 1 exports has conveying arrangement to deliver to cement plant.
Described starting trouble auxiliary steam pipeline is by high-temperature steam（200 DEG C about）Lead between steam header 3
Equipped with manually-operated gate on pipeline.
It is additionally provided with three electric thermo-couple temperature measuring points and corresponding sample tap on described paddle type sludge dryer 4 fuselage.
Described system includes sludge drying system and mud blends CIU；
Described sludge drying system includes heating system, feed system, paddle type sludge dryer, mud in dry run
Produce waste gas recycling system, exhaust steam reutilization system, dewatered sludge collection and disposal system；
Described heating system provides thermal source for paddle type sludge dryer, steams high temperature from starting trouble auxiliary steam pipeline
Vapour（200 DEG C about）Lead to steam header, therebetween equipped with manually-operated gate, draw jet chimney from steam header and connect respectively
Air intake to sludge drier.
Described feed system provides undressed mud for paddle type sludge dryer, using auger type sewage sludge feed
Machine, by fresh sludge（Moisture content more than 90%）Continual feeding sludge drier, simultaneously for convenience of controlling inlet amount, feeds
Machine rotating speed scalable.
Described paddle type sludge dryer is the main equipment of sludge drying system, is responsible for fresh sludge mummification to requiring
Moisture content, requirement moisture content 50% about of proceeding from the reality, so not only can affect follow-up mud with steam saving but also not
The processing procedures such as burning, this drying machine belongs to contact drying equipment, and steam is not directly contacted with mud；Mud is removed on its middle fuselage
Outer with steam import and export, it is also provided with three electric thermo-couple temperature measuring points and corresponding sample tap, so that real-time monitoring sludge drying
Situation is it is ensured that sludge drier safe and stable operation.
The waste gas that described waste gas recycling system produces during referring to dewatered sludge passes sequentially through cyclone separator, moisture film
Cleaner unit, small-sized fan deliver to station boiler air-introduced machine, enter boiler furnace burning disposal with air, finally by steam power plant
Smoke processing system is discharged into air；
The exhaust steam major part of described exhaust steam processing system is condensed into aqueous water, because this aqueous water quality is higher, permissible
Deliver to water dust scrubber through water pump to recycle；The sewage that water dust scrubber is discharged simultaneously is directed directly to boiler furnace top through pipeline
Regional evapotranspiration burns, and both ensure that the recycling of high-quality water vapour, and has not produced sewage and pathogenic bacteria.
Described dewatered sludge is collected and disposal system is used for collecting the dewatered sludge of drying machine outlet, goes out with practical conditions
Send out, typically this outlet dewatered sludge can reach the granularity requirements to coal dust for the station boiler；Will if this dewatered sludge does not reach power plant
Seek granularity, then need to deliver to mud and at power plant coal, be ground to boiler of power plant desired particle size（Only need rough lapping）.
Described mud blends CIU and includes dewatered sludge blending system, dewatered sludge CIU：
Described dewatered sludge blends system and refers to be up to be transported to coal yard into the qualified mud of stove granularity requirements, because mud
Bigger than coal dust viscosity, if be routed directly to coal conveyer belt to be susceptible to block, so needing mud with coal dust in coal yard by certain
Ratio blends in advance.
Described dewatered sludge CIU refers to for the coal dust having blended and mud to deliver to power plant via the coal conveyer belt of power plant
Boiler burns, and the flue gas producing after its burning processes heel row toward air through power-plant flue gas processing system, delivers to after its ash collection
The secondary utilization such as cement plant.
The system is drawn high-temperature vapor by the starting trouble auxiliary steam pipeline of steam power plant and is entered oar blade type drying sludge
Machine, and the mud of moisture content more than 90% simultaneously sends into sludge drier by auger type charger, wherein steam is direct with mud
Contact；Dewatered sludge after the completion of drying（Moisture content is 50% about）It is expelled to mud by the sludge outlet on drying machine to collect
Device, is then processed through low speed coal mill, and qualified mud is delivered to after coal yard is blended by a certain percentage with coal dust and sent with coal conveyer belt
Enter thermal power plant boiler burning, it is past big that the flue gas that thermal power plant boiler burning produces processes qualified heel row through steam power plant's smoke processing system
Gas, delivers to the secondary utilization such as cement plant after its ash collection；The waste gas producing in dry run is via cyclone separator and moisture film
Cleaner unit delivers to boiler induced-draft fan after processing, and sends into boiler furnace and participate in burning together with air；Discharge the water vapour part of heat
It is condensed into aqueous water, deliver to water dust scrubber through water pump and recycle.
The present invention, with respect to prior art, has the advantages that：
（1）Power plant's superior resources can be made full use of（Steam, electric power, boiler etc.）, and dirty by boiler of power plant incineration disposal
During mud, one side dewatered sludge moisture content only need to be down to 50% about, greatlys save expense needed for sludge deep mummification；
Another aspect boiler hearth temperature is higher, the pathogen in mud and harmful substance can be made thoroughly to decompose, its lime-ash is acceptable
Secondary utilization.
（2）Any change need not be made to station boiler, only sludge drier need to be installed by power plant's starting trouble, operable
Property big and up-front investment is less.
（3）The no any pollutant of the system produce：In dry run and sludge incineration produce waste gas can make full use of
The advanced smoke processing system of power plant, both ensure that processing the exhaust steam discharge producing in sludge process reached state-set standard,
Save exhaust steam again and process investment；Washing water adopts water vapour condensed water to recycle mode, and the final sewage producing sprays into
Burner hearth is processed, and neither waste water resource again will not be to environment.
（4）The high-temperature steam dewatered sludge being produced using station boiler, utilizes the sludge incineration release heat after mummification again
Produce steam, open a cyclic utilization of waste, the effective way of the treatment of wastes with processes of wastes against one another, notable environmental benefit can be produced.
Brief description
Fig. 1 is sludge drying system schematic diagram；
Fig. 2 is sludge incinerating system schematic diagram.
In Fig. 1 and Fig. 2, direction shown in arrow is the direction of motion of various materials；
The each reference of in figure is expressed as：1- station boiler, 2- steam turbine, 3- steam header, 4- oar blade type mud
Drying machine, 5- auger type charger, 6- finished product mud collection device, 7- cyclone separator, 8- water dust scrubber, 9- air-introduced machine,
10- water pump, 11- dewatered sludge feed bin, 12- low speed coal mill, 13- coal yard, 14- coal conveyer belt, 15- exhaust steam processing system, 16-
Mud transport vehicle.
Specific embodiment
With specific embodiment, the present invention is described in further details below in conjunction with the accompanying drawings：
Referring to Fig. 1, it is the sludge drying and incineration system embodiment of the support steam power plant of the present invention, steam power plant includes startup
Boiler and station boiler 1, the superheated steam that station boiler 1 produces is sequentially connected steam turbine 2, starting trouble auxiliary steam through pipeline
Pipeline and a steam header 3,（Starting trouble auxiliary steam pipeline is not drawn into）.
System includes paddle type sludge dryer 4 and the auger type charger feeding to it and collects its finished product mud
Finished product mud collection device 6.
Paddle type sludge dryer 4 is that the dewatered sludge moisture content after the completion of steam is not directly contacted with, is dried with mud exists
50% about type, is distributed with steam inlet, exhaust steam outlet, mud import, sludge outlet and mud waste gas and goes out on its fuselage
Mouthful：Described steam inlet is provided with pipeline and connects described steam header 3, exhaust steam（Steam (vapor) outlet material is exactly exhaust steam, has one
Branch is condensed into water）Outlet be then sequentially provided with pipeline through water pump 10 connect to described water dust scrubber 8, mud import and export connect respectively
Connect described auger type charger and finished product mud collection device 6, mud waste gas（It is not the same thing with exhaust steam）Outlet is provided with pipeline
It is sequentially connected cyclone separator 7/ water dust scrubber 8 and described steam power plant station boiler 1 air-introduced machine, described water dust scrubber 8
Outfall is provided with pipeline and connects to described station boiler 1.
Referring to Fig. 2, system also includes dewatered sludge and collects and disposal system, and it is dirty that it includes collecting the mummification of drying machine outlet
The dewatered sludge storehouse 11 of mud（Add power plant coal when coal dust size is unqualified）, conveying machinery（16）（Such as power plant's fortune
Defeated car, is used directly to deliver to coal yard, has sign in figure）, coal yard（13）Mixed coal device and coal conveyer belt（14）.
Starting trouble auxiliary steam pipeline is by high-temperature steam（200 DEG C about）Lead on the pipeline between steam header 3
Equipped with manually-operated gate；Three electric thermo-couple temperature measuring points and corresponding sample tap are additionally provided with paddle type sludge dryer 4 fuselage.
Paddle type sludge dryer 4 generally using the conduction oil after steam or heating as dried medium, using indirect mode
Heated, and be aided with blade stirring, wherein blade design have hollow and solid not.
The principle of the present invention is：
As shown in figure 1, high-temperature vapor is drawn by starting trouble auxiliary steam pipeline enter paddle type sludge dryer 4,
The mud of moisture content more than 90% sends into sludge drier 4 by auger type charger 5, and wherein steam and mud is not directly contacted with, and does
Dewatered sludge after the completion of dry（50% about）Mud collection device 6 is expelled to by the sludge outlet on drying machine, simultaneously dried
The waste gas producing in journey delivers to boiler induced-draft fan 9 after processing via cyclone separator 7 and water dust scrubber 8, send together with air
Enter boiler furnace and participate in burning；The water vapour major part discharging heat is condensed into aqueous water, delivers to water dust scrubber 8 again through water pump 10
Using.
As shown in Fig. 2 the dewatered sludge in sludge drier 4 exit delivers to coal yard 13 mixing in advance by a certain percentage with coal dust
Boiler furnace burning is sent into coal conveyer belt 14, the flue gas producing after its burning is through exhaust steam of electric power plant processing system 15 after mixed（For electricity
Factory's smoke processing system, does not newly add thing）Process qualified heel row toward air, after its ash collection, deliver to the secondary profit such as cement plant
With.
Described sludge drying system specifically includes following part：
1st, heating system：There is provided thermal source for paddle type sludge dryer 4, station boiler 1 produces water vapour, enter steam turbine
2 workmanships, part acting steam（200 DEG C about）Steam header 3 is led to by starting trouble auxiliary steam pipeline, fills therebetween
There is manually-operated gate, draw, from steam header, the air intake that jet chimney is respectively connected to sludge drier 4.
2nd, feed system：There is provided fresh sludge for paddle type sludge dryer, using auger type sludge feeding machine 5, will be new
Fresh mud（Moisture content more than 90%）Continual feeding sludge drier, simultaneously for convenience of controlling inlet amount, charger rotating speed can
Adjust.
3rd, paddle type sludge dryer：The main equipment of sludge drying system, is responsible for fresh sludge mummification to requiring
Moisture content, requirement moisture content 50% about of proceeding from the reality, so not only can affect follow-up mud with steam saving but also not and burn
The processing procedures such as burning, this drying machine belongs to contact drying equipment, and steam is not directly contacted with mud.In its middle fuselage remove mud and
Steam is also provided with three electric thermo-couple temperature measuring points and corresponding sample tap, so that real-time monitoring sludge drying feelings outside importing and exporting
Condition is it is ensured that sludge drier safe and stable operation.
4th, exhaust steam processing system：The waste gas producing during dewatered sludge passes sequentially through cyclone separator 7, water dust scrubber
8th, small-sized fan delivers to station boiler air-introduced machine 9, enters boiler furnace burning disposal with air, finally by the flue gas of steam power plant
Processing system 15 is discharged into air.
5th, exhaust steam reutilization system：Exothermic water vapour exhaust steam major part is condensed into aqueous water, because this aqueous water
Quality is higher, can deliver to water dust scrubber 8 through water pump 10 and recycle.The sewage that water dust scrubber 8 is discharged simultaneously is directed directly to
Boiler furnace upper area combustion by evaporation, both ensure that the recycling of high-quality water vapour, and did not produce sewage and pathogen.
6th, dewatered sludge is collected and disposal system：The dewatered sludge of drying machine outlet is collected in dewatered sludge storehouse 11, from reality
Situation is set out, and typically this outlet dewatered sludge can reach the granularity requirements to coal dust for the station boiler；If this dewatered sludge does not reach
Power plant requires granularity, then need to deliver to mud and be ground to boiler of power plant desired particle size at power plant coal 12（Only need rough lapping
?）.
Described mud blends CIU and specifically includes following part：
1st, dewatered sludge blends system：It is up to the qualified mud into stove granularity requirements and is transported to coal yard 13, press with coal dust
Certain proportion blends in advance.
2nd, dewatered sludge CIU：The coal dust having blended and mud deliver to boiler of power plant via the coal conveyer belt 14 of power plant
Burn, the flue gas producing after its burning processes heel row toward air through exhaust steam of electric power plant processing system 15, delivers to water after its ash collection
The secondary utilization such as mud factory.
Claims (6)
1. a kind of sludge drying and incineration system relying on steam power plant, described steam power plant includes starting trouble and station boiler
（1）, it is characterized in that：Described station boiler（1）It is provided with jet chimney successively through steam turbine（2）With starting trouble auxiliary steam pipeline
Connect a steam header（3）, described system includes paddle type sludge dryer（4）, and feed to it auger type charging
Machine and the finished product mud collection device collecting its finished product mud（6）；
Described paddle type sludge dryer（4）Steam inlet, exhaust steam outlet, mud import, sludge outlet are distributed with fuselage
With mud waste gas outlet, steam inlet be provided with pipeline connect described steam header（3）, exhaust steam outlet be then sequentially provided with pipeline warp
Water pump（10）Connect to water dust scrubber（8）, mud imports and exports and connects described auger type charger and finished product mud respectively and collect
Device（6）, mud waste gas outlet is provided with pipeline and is sequentially connected cyclone separator（7）, water dust scrubber（8）With described steam power plant electricity
Stand boiler（1）Air-introduced machine, described water dust scrubber（8）Outfall be provided with pipeline and connect to described station boiler（1）.
2. the sludge drying and incineration system relying on steam power plant according to claim 1, is characterized in that：Described oar blade type is dirty
Mud drying machine（4）Be not directly contacted with for steam and mud, be dried after the completion of dewatered sludge moisture content 50% type.
3. the sludge drying and incineration system relying on steam power plant according to claim 1 and 2, is characterized in that：Described system
Also include dewatered sludge to collect and disposal system, it includes collecting the dewatered sludge storehouse of the dewatered sludge of drying machine outlet（11）、
Conveying machinery（16）, coal yard（13）Mixed coal device and coal conveyer belt（14）.
4. the sludge drying and incineration system relying on steam power plant according to claim 3, is characterized in that：Described dewatered sludge
Collect and disposal system also includes power plant coal.
5. the sludge drying and incineration system relying on steam power plant according to claim 3, is characterized in that：Described starting trouble is auxiliary
Help jet chimney equipped with manually-operated gate to the pipeline of steam header (3).
6. the sludge drying and incineration system relying on steam power plant according to claim 4, is characterized in that：Described oar blade type is dirty
Three electric thermo-couple temperature measuring points and corresponding sample tap are provided with mud drying machine (4) fuselage.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105089722A (en) * | 2015-08-27 | 2015-11-25 | 苏州市江远热电有限责任公司 | Sludge drying power generating system and method |
| CN105180176A (en) * | 2015-09-30 | 2015-12-23 | 上海市城市建设设计研究总院 | Dried sludge conveying system with wind distribution branch and treatment method |
| CN105157042A (en) * | 2015-09-30 | 2015-12-16 | 上海市城市建设设计研究总院 | Conveying system and processing method for powder granule sludge |
| CN105114963A (en) * | 2015-09-30 | 2015-12-02 | 上海市城市建设设计研究总院 | Conveying system for dried sludge |
| CN107013928A (en) * | 2017-05-19 | 2017-08-04 | 重庆三峰卡万塔环境产业有限公司 | A kind of method and system of grate furnace waste incineration cooperatively processing sludge |
| CN107351239A (en) * | 2017-08-26 | 2017-11-17 | 汕头市宏基混凝土构件有限公司 | A kind of method using steam power plant's steam production PHC pile tubes |
| CN108579138A (en) * | 2018-05-17 | 2018-09-28 | 武红亮 | A kind of novel peripheral drive sludge scraper |
| CN111233290A (en) * | 2020-01-23 | 2020-06-05 | 重庆市渝西水务有限公司 | Sludge treatment system for sewage treatment plant |
| CN111623896B (en) * | 2020-05-24 | 2021-11-16 | 西安交通大学 | Supercritical water on-line flow testing device |
| CN112443849A (en) * | 2020-11-20 | 2021-03-05 | 安徽国祯生态科技有限公司 | Biomass power plant coupling sludge drying incineration method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1743284A (en) * | 2004-08-30 | 2006-03-08 | 徐宝安 | Sewage-refuse treatment clean-production system at the center of generating plant |
| CN1314606C (en) * | 2005-04-04 | 2007-05-09 | 浙江大学 | Tandem type anhydration system for sludge by using remaining heat of flue gas from steam power plant |
| JP2008149304A (en) * | 2006-12-15 | 2008-07-03 | Everest:Kk | Sludge drying method and dried sludge obtained after drying |
| KR20070053178A (en) * | 2007-04-04 | 2007-05-23 | 박경식 | The sludge drying machine |
| CN101538110A (en) * | 2009-04-01 | 2009-09-23 | 南京大学亚光工业技术有限公司 | Sludge drying method combining residual heat of flue gas of boiling furnace and thermal power plant and device system thereof |
| CN102353061A (en) * | 2011-08-19 | 2012-02-15 | 宁波互联聚能环保技术有限公司 | System and method for comprehensively utilizing sludge drying and burning waste heats stepwise |
| CN102887619A (en) * | 2012-11-02 | 2013-01-23 | 张开晓 | Water-containing sludge treatment method |
| CN203718787U (en) * | 2013-11-08 | 2014-07-16 | 潘老省 | Fume recycling waste incineration boiler |
| CN104176898B (en) * | 2014-08-29 | 2015-10-28 | 凤阳海泰科能源环境管理服务有限公司 | A kind of sludge drying system and method |
| CN204529636U (en) * | 2015-01-23 | 2015-08-05 | 广东电网有限责任公司电力科学研究院 | A kind of sludge drying and incineration system relying on heat power plant |
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