CN101961595A - Desulfurization-high temperature biological deodorization method for foul smell waste gas produced by sludge treatment - Google Patents
Desulfurization-high temperature biological deodorization method for foul smell waste gas produced by sludge treatment Download PDFInfo
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Treating Waste Gases (AREA)
Abstract
The invention relates to a desulfurization-high temperature biological deodorization method for foul smell waste gas produced by sludge treatment. The method is a novel technical method assorted with cyclic economy and comprehensive utilization of a sludge resource. The foul smell waste gas is treated by a process which combines wet desulphurization with biological treatment and the wet desulphurization and temperature lowering are performed to construct a high-temperature and high-efficiency biological bacterial community micro-ecosystem for treating the foul smell waste gas into a nontoxic and harmless substance by continuous aerobic degradation. The method plays an important role in eliminating the technical bottlenecks of the disturbance of the foul smell waste gas produced in a waste heat drying/burning process during the sludge treatment and the application of the sludge treatment, facilitating the technical popularization of sludge drying and sludge burning during waste heat treatment and achieving extremely significant environmental benefit and social benefit. A desulphurization-biological treatment system can realize up-to-standard emission of pollutants such as foul smell drying/burning waste gas, sulfur dioxide, nitrogen oxide and the like produced by the sludge treatment, has the advantages of high waste gas purification efficiency, high device running stability, low running cost, no secondary pollution and the like and is simple and convenient to operate.
Description
Technical field
The present invention relates to a kind of desulfurization-high temperature biological deodorization method of sludge treatment foul waste gas, belong to environmental technology field.
Technical background
Mud has become one of important environmental problem that influences China's urban development.The processing handling problems of sludge from wastewater treatment plant has caused showing great attention in the industry, also is the challenge that countries in the world all face.Put into operation 1529 of urban wastewater treatment firms of China in 2008, the amount of disposing of sewage 23,300,000,000 m
3, " 15 " initial stage of comparing increases about one times, about 1,600 ten thousand tons of the mud of generation moisture content 80%, and with annual speed increment more than 10%.
At present, sludge treatment mainly adopts methods such as sanitary landfills, compost, mummification, burning.Adding heat drying mainly is to utilize heat energy with the moisture content of mud oven dry to needs, roughly can be divided into two big classes, and a class is to carry out direct mummification with flue gas or superheated vapor; Another kind of is to carry out indirectly drying with steam or heat conduction wet goods hot media.Sludge incineration by treatment process can be divided into direct burning, dewatered sludge burning disposal, with the coal dust fluid bed in mix burnings, technology such as the processing of generating electricity with the rubbish mixed burning.Sludge anhydration burning is that dewatered sludge is carried out drying earlier, reduces moisture content, sends into incinerator then and burns.Since 2003 China Shenzhen the construction fever mummification add the project of burning sludge; Treatment of Sludge factory has also been built in Tianjin, is beginning exploration aspect the sludge digestion generating; After utilizing thermal power plant boiler flue gas drying mud, with the industrial solid castoff blending burning electricity generation that acts as a fuel.The ShenYang, Liaoning Province city is obtaining success aspect the burning sludge power generation.Shanghai City bamboo plantation sludge treatment adopts the anhydration and incineration technology, and incineration residue and flying dust slag and flying ash will be done the building materials utilization and dispose.Beijing, Guangzhou and Chongqing utilize the cement kiln high-temperature flue gas dewatered sludge to incorporate kiln into and burn, and realize the sludge treatment resource.
Odor pollution is as one of the world's seven overall situation public hazards.Foul gas can not only bring the discomfort of people's sense of smell, also can cause nausea, functional diseases such as headache, apocleisis, insomnia, mood agitation, causes poisoning when serious, even brings out acute disease and cause death.The complaint incident that the stench problem that the sewage sludge processing is disposed causes increases year by year.When carrying out direct mummification,, in mummification, can make many organic matter decomposition in the mud, cause odor pollution because temperature is higher with flue gas or superheated steam.Burning process produces foul waste gas, its composition has: sulfur dioxide, nitrogen oxide, particle, sour gas (HCl, HF), organic matter (comprising bioxin) and heavy metal smog etc.These foul gas produce directly pollution to surrounding environment and atmosphere, and harm staff and peripheral resident are healthy.Therefore the improvement of sludge treatment high temperature foul waste gas has become and even the national environment protection problem demanding prompt solution.
The foul waste gas pollution prevention technique mainly contains absorption process, absorption method, catalytic oxidation, photocatalytic method, corona method, ozone method, plasma method and microbial method etc.The biological deodorizing method is compared with physical-chemical process, has that operating cost is low, simple to operate, treatment effect is good and characteristics such as non-secondary pollution, becomes the main stream approach of deodorization research in recent years.From nineteen twenties edaphon be applied to handling H first
2Behind the S waste gas, up to last century early eighties begin, biological method purification waste gas obtains very big development in Germany, Japan and Holland, and becomes one of the hot research field, forward position in world industry waste gas purification field gradually.Up to the present, industries such as existing all kinds of microbial deodorant devices and equipment have been successfully applied to metallurgy, oil, chemical industry, light industry in states such as moral, day, lotuses, butcher, sewage disposal, the biological purification plant that puts into operation has exceeded thousand covers, equipment and device development, be commercialization situation, and effect is good.Domesticly start late in this respect, just begin the research that experimentizes of biochemical process purifying low-concentration waste gas up to the nineties.And there is the bioanalysis processing to contain NH
3Research such as foul smell, hydrogen sulfide and methyl mercaptan mixing [, house refuse stench, multicomponent odorous gas, pharmaceutical factory's volatility mix waste gas, aquatic feeds foul waste gas report.Domestic biotechnology has realized the engineering application in exhaust-gas treatments such as reclaimed rubber factory, pharmaceutical factory's oxygen compatibility pool high concentration stench, oil refining sewerage factory stench and sewage plant bad smells.
The problem that present sludge treatment oven dry/burning waste gas mainly exists has: gas flow is big, foul waste gas disturbs residents, and the resident complains more, the sulfur dioxide concentration height.In order to satisfy adaptability and the reliability of being strict with and improving system more, the exploitation group technology has good practical value.
Summary of the invention
The present invention relates to the desulfurization-high temperature biological deodorization method of a kind of sludge treatment stench mummification/burning waste gas.It is a kind of sludge treatment foul waste gas new processing method, adopt wet desulphurization handle with make up in the high temperature high-performance bio microbial inoculum microecosystem PROCESS FOR TREATMENT sludge treatment foul waste gas that combines of carrying out a biological disposal upon, utilize wet desulphurization that the sulfur dioxide in the waste gas is removed, ℃ reduce the violent influence of sulfur dioxide to the pH of biological deodorization system value simultaneously to reduce EGT to 60, the bio-trickling method continues aerobic degradation with foul waste gas and becomes the harmless material of odorless.Desulfurization-biological deodorization technology has multiple function, one cover system solves pollutant emissions such as sludge treatment oven dry waste gas stench, sulfur dioxide, nitrogen oxide, not only solve the recent foul smell problem that disturbs residents, and solved sulfur dioxide, the discharged nitrous oxides problem up to standard that long term growth must solve, this meets country-driven cleaner production, energy-saving and emission-reduction, has embodied the CSR sense.It is a kind of recycling economy, the supporting new technique method of sludge resource comprehensive utilization, the foul waste gas that solves sludge treatment oven dry, burning process generation is disturbed residents, the technology of utilizing cement used heat to dispose oven dry mud is promoted, had very great environmental benefit and social benefit.
Desulfurization-high temperature the biological deodorization method of sludge treatment stench mummification of the present invention/burning waste gas, this technology can efficiently be removed stench gaseous contaminant, sulfur dioxide and nitrogen oxide, deodorization efficiency can reach more than 90%, and desulfuration efficiency can reach more than 95%, and denitration efficiency can reach 60%.Desulfurization-high temperature biological deodorization treatment system can tolerate the influence of variation, unstable state operating mode and the ambient temperature of pollutional load and component; Have the exhaust purification efficiency height, exhaust gas decomposition is thorough, easy and simple to handle, the device good operation stability, the investment operating cost is low and advantage such as non-secondary pollution, is adapted to the purified treatment of low concentration atm number waste gas sludge treatment oven dry foul waste gas, sludge incineration stench flue gas.
Purpose of the present invention can be achieved through the following technical solutions:
Design, use the desulfurization-high temperature biological deodorization technology of a kind of sludge treatment stench mummification/burnings waste gas, adopt wet desulphurization handle with structure in the high temperature high-performance bio microbial inoculum microecosystem PROCESS FOR TREATMENT sludge treatment foul waste gas that combines of carrying out a biological disposal upon.Handle by the desulfurization of limestone/lime-gypsum method, can rise and remove sulfur dioxide and cooling effect, so that dropping to about 60 ℃, EGT enters bio-trickling device, high temperature high-performance bio microbial inoculum microecosystem in making up in the trickling, odorant pollutant is degraded by microorganisms into the compound of odorless, reach the efficient deodorizing purpose, simultaneously the high temperature bio-trickling device also can be removed sulfur dioxide and nitrogen oxide, and biological cycle liquid is by being provided with the pH probe so that to regulate the pH value of circulation fluid automatically be 6-7 by adding acid or alkali.
Design, the wet desulphurization device of making can adopt limestone/lime-gypsum method flue gas desulfurization absorption plant, and limestone-gypsum wet fuel gas desulfurizing technology system mainly is made up of absorption system, flue gas system, limestone slurry liquid preparing system, gypsum dehydration system etc.The absorption tower adopt spray column, spraying layer be located at the absorption tower on, multi-stage spray, spraying layer top is provided with secondary demist and flushing device thereof; The calcium sulfite oxidation system is established in the bottom.Utilize wet desulphurization that the sulfur dioxide in the waste gas is removed, ℃ reduce the violent influence of sulfur dioxide simultaneously the pH of biological deodorization system value to reduce EGT to 60.
Design, making bio-trickling device, the apparatus structure form has: split is reverse-flow, a bluk recombination is reverse-flow and the cross-current type structure, adopts steel construction or xoncrete structure.Used filler (carrier) is haydite, pottery piece, mixed fillers etc., and the filler layering is loaded.Each filler unit is established a gas flow guiding orifice plate and one group of distributing slot, makes waste gas and water distribution even.Trickling all adopts the mode of operation of gas, liquid two phase countercurrent flow, and the cross-current type trickling then adopts gas, the staggered mode of operation that flows of liquid two-phase.The microecosystem of the sludge treatment oven dry/burning foul waste gas that the microorganism species of gases such as the degraded of the interior employing of device special efficacy odorant, sulfur dioxide and nitrogen oxide makes up, this microorganism species can adapt to wider temperature range (10～65 ℃), can tolerate the influence of low temperature and hot environment, have the efficient deodorizing performance.Biological cycle liquid storage tank bottom is provided with aeration tube, helps the odorant pollutant of aerobic biodegradation circulation fluid.The mist device install is removed at the bio-trickling device top, it be with woven wire or synthetic fibers silk screen as except that the mist element, clamping is between two screens and constitute.
The specific embodiment
Below the present invention will be further described by example.
Embodiment one: biological treatment sludge treatment oven dry foul waste gas
Contain ammonia, hydrogen sulfide, methyl mercaptan (CH according to what sludge treatment oven dry foul waste gas produced
3SH), HCl, SO
2, NO
xDeng complicated inorganic organic foul gas, its characteristics are: complicated component, sulfur dioxide (SO
2) the higher (1500mg/m of concentration
3), nitrogen oxide (NO
x) the higher (500～700mg/m of concentration
3), odor concentration 4170, waste gas oxygen content low (＜5%), EGT height (110 ℃), odor concentration height.Wet desulphurization-high temperature bioanalysis is handled sludge treatment oven dry foul waste gas demonstration project long-play study on the stability, shown excellent operation stability therebetween, biological deodorizing can be stabilized in 90%, and desulfuration efficiency can reach more than 98%, and denitration efficiency can reach 60%.
Embodiment two: the biological treatment sludge treatment burns foul waste gas
Produce foul waste gas according to sludge anhydration burning, its composition has sulfur dioxide, nitrogen oxide, particle, sour gas (HCl, HF), stench organic matter and heavy metal smog.This foul waste gas is handled through wet desulphurization-high temperature bioanalysis, and biological deodorizing efficient can be stabilized in 90%, and desulfuration efficiency can reach more than 95%, and denitration efficiency can reach 50%.
Claims (5)
1. the present invention relates to a kind of desulfurization-high temperature biological deodorization method of sludge treatment foul waste gas.It is characterized in that multiple function, a cover system solves pollutant qualified discharge problems such as sludge treatment oven dry/burning waste gas stench, sulfur dioxide, nitrogen oxide, and this meets country-driven cleaner production, energy-saving and emission-reduction.
2. according to the sulfur method of the described sludge treatment foul waste gas of claim 1, it is characterized in that wet desulphurization can adopt lime stone, the flue gas desulfurization of lime/gypsum method, utilize wet desulphurization that the sulfur dioxide in the waste gas is removed, reduce EGT to 60 ℃, reduce the violent influence of sulfur dioxide simultaneously the pH of biological deodorization system value.
3. according to the high temperature biological deodorization method of the described sludge treatment foul waste gas of claim 1, it is characterized in that adopting bio-trickling device, reverse-flow or cross-current type, filler adopts haydite, pottery piece, mixed fillers etc., and the filler layering is loaded.
4. according to the desulfurization-high temperature biological deodorization method of the described sludge treatment foul waste gas of claim 1, it is characterized in that adopting the microecosystem of the sludge treatment oven dry/burning foul waste gas that the microorganism species of gases such as special efficacy degraded odorant, sulfur dioxide and nitrogen oxide makes up, this microorganism species can adapt to wider temperature range (10～65 ℃), can tolerate the influence of low temperature and hot environment, have the efficient deodorizing performance.
5. according to the desulfurization-high temperature biological deodorization method of the described sludge treatment foul waste gas of claim 1, it is characterized in that aeration tube is set in the circulation fluid storage tank, the pH probe be set to regulate the appropriate pH value of circulation fluid automatically by adding acid or alkali.The bio-trickling device system can tolerate the influence of variation, unstable state operating mode, EGT and the ambient temperature of odor pollution load and component.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272463A (en) * | 2013-05-23 | 2013-09-04 | 杭州国泰环保科技有限公司 | Process for treating malodorous gases in sludge |
| CN103623688A (en) * | 2013-11-26 | 2014-03-12 | 华南理工大学 | Seawater-biological process flue gas desulfurization and denitrification integrated device |
| CN108654357A (en) * | 2018-07-03 | 2018-10-16 | 甘肃省科学院生物研究所 | A kind of biological treatment device for the three wastes that burn and artificial microecosystem |
| CN109985498A (en) * | 2019-04-17 | 2019-07-09 | 华北水利水电大学 | A kind of ultra-clean system and technique for removing sulfur dioxide in coal-fired flue-gas |
| CN110201510A (en) * | 2019-06-05 | 2019-09-06 | 南京化工园博瑞德水务有限公司 | A kind of processing method of sludge drying tail gas |
| CN110780695A (en) * | 2019-09-26 | 2020-02-11 | 艾特克控股集团股份有限公司 | Efficient biological drying control device and method matched with carbonization waste gas treatment |
| CN111001296A (en) * | 2019-12-25 | 2020-04-14 | 苏州希图环保科技有限公司 | Fluorine-containing chemical sludge drying waste gas treatment process |
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| CN101234280A (en) * | 2007-11-07 | 2008-08-06 | 中山大学 | Absorption-biological treatment method for malodorous gas |
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- 2010-10-08 CN CN2010105032994A patent/CN101961595A/en active Pending
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| CN101234280A (en) * | 2007-11-07 | 2008-08-06 | 中山大学 | Absorption-biological treatment method for malodorous gas |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272463A (en) * | 2013-05-23 | 2013-09-04 | 杭州国泰环保科技有限公司 | Process for treating malodorous gases in sludge |
| CN103272463B (en) * | 2013-05-23 | 2015-12-02 | 杭州国泰环保科技股份有限公司 | Foul gas treatment process in mud |
| CN103623688A (en) * | 2013-11-26 | 2014-03-12 | 华南理工大学 | Seawater-biological process flue gas desulfurization and denitrification integrated device |
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| CN110780695A (en) * | 2019-09-26 | 2020-02-11 | 艾特克控股集团股份有限公司 | Efficient biological drying control device and method matched with carbonization waste gas treatment |
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