CN2910920Y - System for drying waste slurry and then incinerating thereof - Google Patents
System for drying waste slurry and then incinerating thereof Download PDFInfo
- Publication number
- CN2910920Y CN2910920Y CNU2005200474875U CN200520047487U CN2910920Y CN 2910920 Y CN2910920 Y CN 2910920Y CN U2005200474875 U CNU2005200474875 U CN U2005200474875U CN 200520047487 U CN200520047487 U CN 200520047487U CN 2910920 Y CN2910920 Y CN 2910920Y
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- CN
- China
- Prior art keywords
- sludge
- incineration
- incinerator
- drying
- flue gas
- 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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Classifications
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Abstract
The utility model relates to a sludge drying and incineration system comprising a wet sludge silo, a measuring hopper, a sludge mixer, a sludge dryer, a granular separator, a cooler, a desiccation product silo, an incinerator and a flue gas purifying device, characterized in that: the device system forms an automatic control system controlled by the distributed control system, which includes a sludge drying system, a flue gas purifying system, a fluidized bed sludge incinerator system, a circulation system of the thermal conductive oil heated by the sludge incineration high temperature flue gas in the fluidized bed sludge incinerator system and thus the heated oil is lead into the sludge dryer in the sludge drying and desiccation system to dry the wet sludge. The advantages of the utility model lies in that by using the thermal conductive oil heated by the heat from the incineration of the dry sludge as the thermal medium, which results in the fully cyclic utilization of the resources , the volume reduction of the sludge through desiccation and incineration is over 90%, the desulfurization rate in the incinerator can reaches 75% by applying two grade desulfurization technology, the whole efficiency of desulfurization meets the requirement of the national environmental regulations and the utility model realizes the application of the sludge resource and the volume reduction and the harmless utilization of the sludge.
Description
One, technical field:
The utility model relates to a kind of sludge treatment technology, particularly discloses a kind of sludge drying and incineration system, is applicable to the processing of municipal sewage plant's active sludge.
Two, background technology:
The active sludge of general municipal sewage plant, butt mud state organic content reaches as high as 80%.Organic components complexity in the mud contains amounts of protein, amino acid, fat, VITAMIN, mineral oil, washing composition, corruption and plants matter, bacterium and meta-bolites, various nitrogenous, S-contained substances, volatility foreign odor thing, parasite and pathogenic microorganism etc.Volatility foreign odor thing is mainly materials such as organosulfur and organonitrogen.
Following 10 years be wastewater treatment in China market golden age, to build up thousands of sewage works, every day will be discharged water ratio above the hundreds of and even up to ten thousand tons of the excess sludge more than 80% by every sewage work, and the mud of these enormous amount will become a difficult problem following in need of immediate treatment.Whole nation urban wastewater treatment firm is produced about 1,800,000 tons/year of dewatered sludge (9,000,000 tons in moisture 80% mud); Estimate to produce 5,400,000 tons of dewatered sludges (2,700 ten thousand tons in moisture 80% mud) every year in the coming five years.The GB18918-2002 " municipal sewage plant's pollutant emission standard " of State Environmental Protection Administration's issue came into effect on July 1st, 2003, had increased the content of mud control criterion especially.
Along with the raising of wastewater treatment rate, sludge yield also constantly increases, and the treatment and disposal problem of mud is outstanding further.Clean water can work the mischief to the mankind and nature and is called sewage because of wherein containing organism, heavy metal, virus, bacterium etc. after using.Say it is partly these separated from contaminants to be transferred in the mud on the certain meaning of the purifying treatment of sewage.With respect to sewage, the approximate concentration of the pollutant component of mud is then much higher, shows as in practice:
(1) stink is big: numerous easy putrescible organism send various malodorous smells and influence environment in the processing of mud, transportation, storage;
(2) dangerous high: containing heavy metal, the deleterious organic synthesis things etc. such as zinc, copper, chromium, lead, cadmium of a large amount of virus, bacterium, protozoon and high density in the mud, all is a kind of potential danger to water resources and HUMAN HEALTH.
Sludge treatment will be carried out degree of depth harmless treatment to mud exactly, thoroughly solves mud to the pollution of environment and to the mankind's harm, and following several big task is arranged usually:
(1) reduces sludge volume: a) in water technology, adopt the method for biological or chemical directly to reduce the generation of mud, avoid and reduce the generation of mud; B) solid content of raising mud in sludge treating system;
(2) sludge quality is stable: remove and easily degenerate rotten organism in the mud;
(3) sewage sludge harmlessness: remove in the mud virus, bacterium, protozoon and the heavy metal etc. that human body or nature are had harm;
(4) recycling of mud: a) utilize the N, the P that are rich in the mud, K etc. to reclaim organic fertilizer, improve edaphic condition, promote plant growth: b) utilize the heat of large amount of organic storage in the mud to burn, reclaim heat energy.
Sludge treatment comprises that mud concentrates, digestion, dehydration, mummification or burn and finally abandon thing and dispose:
| Processing mode | Effect | Handle the solid content of back mud | Handle the main component of back mud |
| Concentrate | Make the mud preliminary hydro-extraction, dwindle sludge volume, for subsequent disposal creates conditions | 3～8％ | Same with primary sludge |
| Digestion | Reduce sludge quantity, prevent contaminate environment and improve utility value | 3～8％ | Same with primary sludge |
| Dehydration | Reduce sludge volume | 15～35％ | Same with primary sludge |
| Dry | Reduce sludge volume, stablize sludge quality, innoxious | 40～93％ | A small amount of organism and inorganic ash |
| Burn | Reduce sludge volume, stablize sludge quality, innoxious and some mud of heat energy recovery contains toxic substance or other reasons is difficult to utilize also burns | ＞99％ | Inorganic ash |
Sludge ultimate disposal and require as follows:
(1) agricultural use: a) remove pathogenic agent, heavy metal etc. are avoided the side effect of life-time service to human body and soil; B) have the advantages that the phase of using is short, the shelf lives is long, should make fertilizer be easy to transportation, store, operate, improve sanitary condition; C) formulate the standard of comprehensively using, reduce detrimentally affect, eliminate user's distrust environment;
(2) landfill: a) the least possible volume; B) prevent secondary pollution;
(3) material of construction: material character is stable, toxicological harmless;
(4) throw the sea: ban use of.
The necessity of sludge anhydration burning:
The restriction of the selection of sludge treatment technique and sludge quality, ultimate sludge disposal mode, district administration's rules, economy, treatment scale, treatment technology, field condition etc. are closely bound up.
Domestic existing be that mud concentrates and dehydration technique substantially, mud through concentrate and dehydration after, generally water ratio can only be reduced to about 80%, and developed country just progressively requires the water ratio of mud to be reduced to 20%～30%.Therefore, efficient, economic sludge treatment technology comprises that dehydration, drying and incineration technology will have huge market.Concentrated, the mechanical dehydration only done at present can not reduce pollution, can not satisfy the health needs, therefore can not satisfy the requirement of sludge disposal.Carrying out drying sludge or burning is the inevitable choice of sludge treatment development.
Three, summary of the invention:
The purpose of this utility model is to disclose a kind of sludge drying and burning process and system and device thereof, is achieved as follows requirement after the sludge treatment:
(1) requirement of pollution removal: concentrate, dewater and can not remove pollutent, dry or burning is an effective way of thoroughly removing pollution load;
(2) requirement of local regulation: some country or place forbid not having the mud of advanced treatment to be disposed;
(3) requirement of ultimate sludge disposal: the use of the reuse of mud agricultural, mud landfill, material of construction all require mud nontoxic, satisfy hygienic requirements;
(4) requirement of economy: the mud after the advanced treatment, its volume is very little, reduces transportation, carrying cost, reduces the expense of landfill simultaneously, and can also heat energy utilization;
(5) assurance of technological development: the full-fledged investment and the working cost of having reduced of drying sludge and incineration technology, improved processing efficiency.
The utility model is achieved in that a kind of sludge drying and incineration system, comprise wet mud feed bin, weighing hopper, sludge mixer, sludge drier, granular separator, water cooler, mummification product bunker, incinerator, smoke eliminator, it is characterized in that: system and device is formed an automation control system, this robot control system(RCS) is used distributed control system control, robot control system(RCS) comprises the sludge drying system with the sludge drier main body that connects successively, the thermal oil recycle system, the fluidized-bed sludge incineration furnace system of incinerator main body, the flue gas purification system of gas-cleaning installation main body, wherein the cold conditions thermal oil is exported at the thermal oil station in the thermal oil recycle system, the cold conditions thermal oil leads to the waste heat boiler of sludge incineration high-temperature flue gas in the fluidized combustion furnace system, and the thermal oil after the heating leads to the sludge drier in the drying sludge anhydration system.Sludge drier adopts the FTW700 type sludge drier that German An Deli thatch fluidised bed system company limited produces in the described sludge drying system.The YGL-2200H type sludge incinerator that described incinerator adopts Wuxi China light boiler plant company limited to produce.A semi-dry desulphurization reactor is set in the described flue gas purification system.The distributed control system of described automatic control adopts the DCS Controlling System of Australian CIT MOX of company and Siemens SIMATIC S7-400.
The beneficial effects of the utility model are:
(1) mud minimizing behind anhydration and incineration is obvious, subtracts capacity and reaches more than 90%, can save a large amount of landfill places;
(2) native system promptly except having selected for use the semidry process desulfurizer, sprays into lime owing to adopted the two-step desulfurization technology in fluidized bed incinerator in flue gas purification system, makes it remove part SO in burning process
2, the desulfurization degree in the incinerator can reach 75%, and total desulfuration efficiency satisfies the national environmental protection laws and regulations requirement, therefore environment is not caused secondary pollution.
The waste heat that sludge incineration produces is used to heat thermal oil, and the necessary energy of drying sludge, adopts thermal oil to be used for realizing the mummification of mud resource being fully used as thermal medium.
Four, description of drawings:
Accompanying drawing 1 is the utility model sludge drying and incineration process flow block diagram;
Accompanying drawing 2 is gas cleaning processing technological flow block diagrams;
Accompanying drawing 3 is DCS system architecture synoptic diagram.
Five, embodiment:
With reference to the accompanying drawings, it is the FTW700 type sludge drier that German An Deli thatch fluidised bed system company limited produces that the utility model adopts the fluidized-bed sludge drier, and this machine is made up of three parts from bottom to top basically:
---bellows, in the bottom of drying machine, be used for recycle gas is distributed to the different zones of fluidizer, a special gas distribution grid is equipped with in its bottom, is used for sending the inertia fluidizing agent.This plate has the firm advantage of design, and its pressure drop can be regulated, and this is crucial to whole drying machine that an amount of air-flow is led.
---interlude: this section is equipped with heat exchanger, forms heat exchanger set, and these heat exchangers carry out the dry and final particle of doing (under fluidized state, mud is distributed in surroundings) that forms with the heat transferred mud of thermal oil.
---suction hood, be used for making the dried particle of fluidizing to break away from recycle gas, and the recycle gas band the mud particulate and moisture evaporated is left drying machine.
Pump is thrown mud into the drying machine opening for feed by charging opening, and these mud are installed in the shredder assembly of each charging opening and smash.
In drying machine, the mud granule of generation is recycled gas fluidized and produces fierce mixing.
The characteristic of fluidization bed has guaranteed continuous consistent temperature and drying property.Owing to rely on the thermal capacity of himself in the fluidized-bed, the residence time is long and product amount is big, therefore, even some fluctuation of the quality of feed or moisture also can be guaranteed uniform drying.Take mud particulate and dust out of fluidized layer with the round-robin gas stream, like this, dustless mud granule adopts the rotation air lock to leave drying machine by normal discharging.
The burner hearth of bubbling fluidized bed sludge incinerator is made up of close phase incineration area and dilute phase incineration area.Fluidizing velocity generally is controlled between 0.6～2.0m/s, and the emulsion zone height generally is controlled between 0.8～1.2m, to guarantee fully contacting and stabilization fluid etc. of bed material and fluidizing medium in the required residing time in furnace of mud perfect combustion and the emulsion zone.The choosing of free board height then depends primarily on the elutriation particulate and carries the residing time in furnace of transport disengaging height TDH, flue gas and the layout of heating surface etc. secretly.
The fluidizing velocity of circulating fluidized bed generally between 3.6～6.0m/s, is about 2～10 times of bubbling bed.Under this fluidizing velocity, flue gas is carried a large amount of fine particles secretly and is flown away from burner hearth, enters gas-solid separating device.The solid particulate that separates is sent into lower furnace portion through the loopback of material device, forms the circulation of material.This operation scheme has guaranteed that solid materialss such as mud and sweetening agent have the sufficient residence time in burner hearth, be greatly improved the burn-off rate of mud and the utilization ratio of sweetening agent.
Circulating fluidized bed and bubbling fluidized bed sludge incinerator have obtained using widely in the sludge treatment industry because of its remarkable performance abroad.Through fully investigating and demonstration, at the practical situation of Shi Dongkou sewage treatment plant, the technological line of this programme determines to adopt the bubbling fluidized bed incinerator, the YGL-2200H type sludge incinerator that incinerator adopts Wuxi magnificent light boiler plant company limited to produce.
Flue gas purification system captures the two parts by removing of sour gas with particulate matter and forms.This process using semidrying spray woods tower and sack cleaner combined system.The semidrying depickling is to spray into a certain amount of lime white in flue gas, make it and the reaction of flue gas middle acid substance, and control moisture makes the reaction process that reaches " spraying drying ".It is dried solid-state that the depickling resultant of reaction is essentially, and waste water and mud can not occur.Sack cleaner is adopted in particulate matter capture measure in the flue gas.Before entering sack cleaner, in flue gas, spray into a certain amount of activated carbon powder again, objectionable impuritiess such as heavy metal and Dioxins then effectively capture in sack cleaner and remove in the absorption flue gas.
Sludge anhydration burning processing system is mainly by four most of compositions:
● the anhydration system of mud
With water ratio is that 70%～80% wet mud is sent in the sludge drying fluidizer, utilizes the heat of vaporization of thermal oil to fall moisture content, becomes water ratio and be 10% with interior dewatered sludge.
● the thermal oil recycle system
This thermal oil recycle system is sent into thermal oil and is delivered in the wet sludge anhydration fluidizer after the fluidized-bed sludge incinerator heats again, and by heat exchange, realizes the mummification effect, comprises simultaneously the cooling oil device behind the high temperature heat conductive oil overtemperature.
● fluidized-bed sludge incineration furnace system
The dewatered sludge of producing when anhydration system stores when a certain amount of, just starts incinerator, with burning the heat heating thermal oil that dewatered sludge obtains, thermal oil is delivered in the wet sludge anhydration fluidizer again, realizes the mummification effect.Finally utilize the heat dewatered sludge of mud itself.
● flue gas purification system
Because the dust content height that sludge incineration produces, directly enter belt fly-ash separator dust removing effects and be difficult to guarantee that a semi-dry desulphurization reactor is set, and not only desulfurization also can be collected a part of grit, alleviate the operating pressure of sack cleaner, and fume emission is up to state standards.
The utility model selects for use DCS (MOX and the SIMATIC S7-400DCS) system that is used in each industrial circles such as power station, chemical industry, petrochemical industry, metallurgy, environmental protection, papermaking Australian CIT company and Siemens exploitation and ripe as Controlling System, realizes the monitoring of production process.
Claims (5)
1, a kind of sludge drying and incineration system, comprise wet mud feed bin, weighing hopper, sludge mixer, sludge drier, granular separator, water cooler, mummification product bunker, incinerator, smoke eliminator, it is characterized in that: system and device is formed an automation control system, this robot control system(RCS) is used distributed control system control, robot control system(RCS) comprises the sludge drying system with the sludge drier main body that connects successively, the thermal oil recycle system, the fluidized-bed sludge incineration furnace system of incinerator main body, the flue gas purification system of gas-cleaning installation main body, wherein the cold conditions thermal oil is exported at the thermal oil station in the thermal oil recycle system, the cold conditions thermal oil leads to the waste heat boiler of sludge incineration high-temperature flue gas in the fluidized combustion furnace system, and the thermal oil after the heating leads to the sludge drier in the drying sludge anhydration system.
2, sludge drying according to claim 1 and incineration system is characterized in that: sludge drier adopts the FTW700 type sludge drier that German An Deli thatch fluidised bed system company limited produces in the described sludge drying system.
3, sludge drying according to claim 1 and incineration system is characterized in that: the YGL-2200H type sludge incinerator that described incinerator adopts Wuxi China light boiler plant company limited to produce.
4, according to claim 1 or 2 or 3 described sludge drying and incineration systems, it is characterized in that: a semi-dry desulphurization reactor is set in the described flue gas purification system.
5, sludge drying according to claim 4 and incineration system is characterized in that: the distributed control system of described automatic control adopts the DCS Controlling System of Australian CIT MOX of company and Siemens SIMATIC S7-400.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200474875U CN2910920Y (en) | 2005-12-14 | 2005-12-14 | System for drying waste slurry and then incinerating thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200474875U CN2910920Y (en) | 2005-12-14 | 2005-12-14 | System for drying waste slurry and then incinerating thereof |
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| Publication Number | Publication Date |
|---|---|
| CN2910920Y true CN2910920Y (en) | 2007-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2005200474875U Expired - Lifetime CN2910920Y (en) | 2005-12-14 | 2005-12-14 | System for drying waste slurry and then incinerating thereof |
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| CN (1) | CN2910920Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871649A (en) * | 2010-07-07 | 2010-10-27 | 广东长青（集团）股份有限公司 | System for pyrolyzing and burning sludge at low temperature |
| CN101881457A (en) * | 2010-07-12 | 2010-11-10 | 北京中科通用能源环保有限责任公司 | Self-balanced sludge incineration method and system |
| CN102167488A (en) * | 2011-01-21 | 2011-08-31 | 上海伏波环保设备有限公司 | Non-contact type sludge drying system utilizing flue gas afterheat |
| CN102336507A (en) * | 2011-08-26 | 2012-02-01 | 沃夫冈·阿门特 | Sludge treatment system and treatment method |
| CN102432151A (en) * | 2012-01-06 | 2012-05-02 | 福建省科辉环保工程有限公司 | Sludge recycling technique |
| WO2012122700A1 (en) * | 2011-03-15 | 2012-09-20 | 大连理工大学 | Two-stage drying and gasification integration device and method of organic substance |
| CN102877497A (en) * | 2012-08-02 | 2013-01-16 | 上海市离心机械研究所有限公司 | River channel desilting method |
| CN103090396A (en) * | 2012-12-06 | 2013-05-08 | 上海金自天正信息技术有限公司 | Two-stage drying and incineration method for sludge |
| CN108840544A (en) * | 2018-07-27 | 2018-11-20 | 成都源永科技发展有限公司 | A kind of reclaiming industrial sludge processing method |
-
2005
- 2005-12-14 CN CNU2005200474875U patent/CN2910920Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871649A (en) * | 2010-07-07 | 2010-10-27 | 广东长青（集团）股份有限公司 | System for pyrolyzing and burning sludge at low temperature |
| CN101881457A (en) * | 2010-07-12 | 2010-11-10 | 北京中科通用能源环保有限责任公司 | Self-balanced sludge incineration method and system |
| CN102167488A (en) * | 2011-01-21 | 2011-08-31 | 上海伏波环保设备有限公司 | Non-contact type sludge drying system utilizing flue gas afterheat |
| CN102167488B (en) * | 2011-01-21 | 2012-11-21 | 上海伏波环保设备有限公司 | Non-contact type sludge drying system utilizing flue gas afterheat |
| TWI421221B (en) * | 2011-01-21 | 2014-01-01 | ||
| WO2012122700A1 (en) * | 2011-03-15 | 2012-09-20 | 大连理工大学 | Two-stage drying and gasification integration device and method of organic substance |
| CN102336507A (en) * | 2011-08-26 | 2012-02-01 | 沃夫冈·阿门特 | Sludge treatment system and treatment method |
| CN102432151A (en) * | 2012-01-06 | 2012-05-02 | 福建省科辉环保工程有限公司 | Sludge recycling technique |
| CN102877497A (en) * | 2012-08-02 | 2013-01-16 | 上海市离心机械研究所有限公司 | River channel desilting method |
| CN103090396A (en) * | 2012-12-06 | 2013-05-08 | 上海金自天正信息技术有限公司 | Two-stage drying and incineration method for sludge |
| CN108840544A (en) * | 2018-07-27 | 2018-11-20 | 成都源永科技发展有限公司 | A kind of reclaiming industrial sludge processing method |
| CN108840544B (en) * | 2018-07-27 | 2021-10-15 | 成都源永科技发展有限公司 | Industrial sludge recycling treatment method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI ZHONGXU ENVIRONMENTAL ENGINEERING CO., LT Free format text: FORMER NAME: SHANGHAI JINZHOU ENVIRONMENTAL ENGINEERING CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 201613, No. 147, Lane 103, Rong Yue Dong Road, Songjiang Town, Shanghai, Songjiang District Patentee after: Shanghai Asahi Environmental Engineering Co. Ltd. Address before: 1902 room 167, 200041 Jiangning Road, Shanghai Patentee before: Shanghai Jinzhou Environmental Engineering Co., Ltd. |
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| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI ZHONGXIN WATER INDUSTRY CO., LTD. Free format text: FORMER OWNER: SHANGHAI ZHONGXU ENVIRONMENTAL ENGINEERING CO., LTD. Effective date: 20140613 |
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Free format text: CORRECT: ADDRESS; FROM: 201613 SONGJIANG, SHANGHAI TO: 200092 YANGPU, SHANGHAI |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140613 Address after: 200092, room 1121, No. two, 801 North Road, Zhongshan, Shanghai, Yangpu District Patentee after: SHANGHAI CITIC WATER INDUSTRY CO., LTD. Address before: 201613, No. 147, Lane 103, Rong Yue Dong Road, Songjiang Town, Shanghai, Songjiang District Patentee before: Shanghai Asahi Environmental Engineering Co. Ltd. |
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| CX01 | Expiry of patent term |
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| EXPY | Termination of patent right or utility model |