CN104843962B - Municipal sludge prepares biogas and produces the method for fired brick - Google Patents
Municipal sludge prepares biogas and produces the method for fired brick Download PDFInfo
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- CN104843962B CN104843962B CN201510251960.XA CN201510251960A CN104843962B CN 104843962 B CN104843962 B CN 104843962B CN 201510251960 A CN201510251960 A CN 201510251960A CN 104843962 B CN104843962 B CN 104843962B
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- sludge
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- anaerobic fermentation
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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
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The present invention relates to a kind of municipal sludge prepares biogas and produces the method for fired brick, comprise the following steps：Steam is sent into from steam boiler to dry-type anaerobic fermentation tank, municipal sludge is carried out dry-type anaerobic fermentation, after fermentation, produce biogas and anaerobic fermentation sludge；Anaerobic fermentation sludge conditioning is modified and be dehydrated, send into drying device and be dried and then carry out crushing and obtain dewatered sludge powder；Dewatered sludge powder is mixed with architecture sediment and extrusion molding is adobe；Adobe is sent in making brick from sludge system, drying, roasting are obtained fired brick；, simultaneously as steam boiler and the thermal source of drying device, the biogas produced after municipal sludge fermentation is used as the heating fuel of making brick from sludge system for flue gas in making brick from sludge system.The method have technical effect that：Process to municipal sludge is substantially not present secondary pollution, and can realize comprehensive utilization of energy.
Description
Technical field
The present invention relates to a kind of Solid Waste Treatment, disposal and recycling, particularly a kind of using municipal sludge product
Raw biogas the method for producing fired brick.
Background technology
Treatment of Sludge, dispose main purpose be by sludge reduction, stabilisation and resource.At present, main by solid
Change landfill, anaerobic digestion, aerobic compost and burning etc. and realize sludge reduction, stabilisation.Feelings in global resources growing tension
Under condition, the resource of sludge, recovery energy should be the dominant direction of sludge treatment.
The high-moisture percentage of sludge is the key factor for hindering recycling sludge to utilize.Sewage treatment plant residual sludge, through dense
After contracting, digestion and mechanical dehydration, the general still moisture content containing 80% or so.There is one layer of extracellular polymeric as sludge is extracellular, lead
Sludge is caused to be dehydrated difficulty further.After adding conditioner conditioning, deep dehydration can be carried out, moisture content one after deep dehydration
As 60% or so, it is believed that 60% is the water cut limit of deep dehydration.Sludge after deep dehydration is carried out heat drying,
Burning disposal, although the minimizing of sludge can be realized, but there are high cost, easy initiation public affairs serious to the secondary sludge of environment
The shortcomings of many events, so as to cannot large-scale promotion.
A kind of method that other raw material production fired bricks are that Treatment of Sludge is utilized is blended in dewatered sludge, can by sintering
To be fully cured heavy metal, it is the desired Safety approach of sludge treatment.But at present in technology, it is difficult to obtain the burning of high sludge volume
Knot brick, main cause is that the content of organic matter is higher in sludge, makes raw material plasticity difference and with certain elasticity, it is difficult to by high pressure
It is pressed into closely knit adobe.In order to the intensity of fired brick is improved, substantial amounts of clay need to be mixed, cause to a large amount of broken of land resource
Bad.
Containing substantial amounts of organic matter in municipal sludge, such as carbohydrate, protein, fat etc., contain abundant biomass energy,
How the energy in excess sludge is effectively recycled, with economy and environment comprehensive benefit.
Content of the invention
The technical problem to be solved in the present invention be to avoid in prior art to carry out the sludge after deep dehydration heat drying,
There is high cost and serious to the secondary sludge of environment in burning disposal, while avoiding blending which in existing dewatered sludge
In its sludge existing for raw material production fired brick, the content of organic matter is higher, it is difficult to be pressed into closely knit adobe by high pressure
Problem, proposes a kind of municipal sludge and prepares biogas and produce the method for fired brick, and the process to municipal sludge is substantially not present two
Secondary pollution, and realize comprehensive utilization of energy.
For above-mentioned technical problem to be solved, the technical solution adopted in the present invention is as follows：
There is provided a kind of municipal sludge to prepare biogas and the method for fired brick is produced, comprise the following steps：
Municipal sludge is sent in dry-type anaerobic fermentation tank, and steam is sent into from steam boiler to dry-type anaerobic fermentation tank,
Municipal sludge carries out dry-type anaerobic fermentation, produces biogas and anaerobic fermentation sludge after fermentation；
The anaerobic fermentation sludge conditioning is modified and be dehydrated, send into drying device and be dried and then carry out crushing and obtain
Dewatered sludge powder；
The dewatered sludge powder is mixed with architecture sediment and extrusion molding is adobe；
The adobe is sent in making brick from sludge system, drying, roasting are obtained fired brick；
Flue gas in the making brick from sludge system is fermented simultaneously as steam boiler and the thermal source of drying device, municipal sludge
The biogas for producing afterwards is used as the heating fuel of making brick from sludge system.
Further：
After municipal sludge mixes afforestation rubbish, then it is admitted in dry-type anaerobic fermentation tank and carries out dry-type anaerobic fermentation.
The anaerobic fermentation sludge is dehydrated using belt filter press, and the anaerobic fermentation moisture percentage in sewage sludge after dehydration is down to 55%
Below.
After the anaerobic fermentation drying sludge, its moisture percentage in sewage sludge is down to less than 30%.
The particle diameter of the dewatered sludge powder that dried anaerobic fermentation sludge is obtained after crushing is 20 ~ 40 mesh.
The dewatered sludge powder is crushed using double-roll crusher after being mixed with architecture sediment.
The dewatered sludge powder is mixed with architecture sediment, and wherein the percentage by weight of dewatered sludge powder is 40 ~ 60%.
The dewatered sludge powder adopts bipolar extrusion under vacuum machine extrusion molding with architecture sediment.
The fermentation temperature of the dry-type anaerobic fermentation is 35 DEG C or 55 DEG C, fermentation period 25 ~ 30 days.
The sintering temperature of the adobe is 900 ~ 1000 DEG C.
Compared with prior art, the method have technical effect that：
The present invention with the high municipal sludge of moisture content as raw material, using dry anaerobic fermentation process, compared to wet type anaerobism
Fermentation, as without moisture content dilution sludge is added, big with treatment scale, floor space is few, and reduced investment and operating cost are low.
The present invention passes through anaerobic digestion, reduces the content of organic matter in sludge, produce biogas can as clean energy resource, and
In digestion process, microorganism micelle structure is destroyed, and is conducive to follow-up dehydration, can be not added with conditioner less plus even
In the case of, dehydrating effect is good.
The present invention carries out deep dehydration using belt filter press to sludge, and with respect to plate compression, belt filter-pressing device connects
Reforwarding row, dewatering time is short, treating capacity is big and floor space is little, saves labour turnover.
The present invention carries out pulverization process to drying sludge, and mud granule is tiny, mixes all with other raw materials during brickmaking
Even, sintered products matter is close, intensity is high.
The present invention collects biogas as tunnel cave fuel, the high-temperature flue gas that tunnel cave is produced as the thermal source of drying device,
And steam boiler generation steam is imported, fermentation raw material is heated, is achieved recycling for the energy in the entire system, reduces whole
The energy consumption of individual system.
The present invention is using architecture sediment as baked brick raw materials, it is not necessary to clay, it is achieved that the cycling and reutilization of waste, protects
National cultivated land resource is protected.
Description of the drawings
Fig. 1 prepares biogas for municipal sludge of the present invention and produces the schematic flow sheet of fired brick method.
Specific embodiment
In conjunction with accompanying drawing, embodiments of the invention are elaborated.
As shown in figure 1, municipal sludge of the present invention prepares biogas and produces fired brick method comprising the following steps：
Step 1：Municipal sludge, moisture content 80% or so, raw material receiving slit is poured into, is provided with actively in raw material receiving slit
Plate, carries out preliminary mix and blend in running to sludge, and sludge is quantitatively taken out and deliver to from receiving slit subsequently sets
Standby.
Step 2：Sludge is sent directly into dry fermentation tank feed arrangement after lifting.Steam is sent into dry type by pipeline and is sent out
Fermentation tank feed arrangement, is carried out together with sludge mixing, heats up, and sends into dry fermentation tank by pipeline.
Step 3：After sludge sends into dry fermentation tank, carry out under closed environment biodegradable.Detesting through a cycle
Aerobe fermentation process, organic matter fractions therein are biodegradable and produce biogas.
Fermentation tank is dry anaerobic fermentation tank, the concrete material of fermentation tank, field fabrication.Stirring is provided with fermentation tank
Device, will be uniform for the material stirring in fermentation tank.Anaerobic fermentation is using the 55 DEG C of fermentations of 35 DEG C of middle temperature or high temperature.Fermentation materials are using steaming
The mode of heating of vapour, steam is directly mixed with the material of charging, reaches the temperature needed for fermentation, while the tank wall that ferments is adopted
Insulation, reduces the thermal loss of fermentation tank.
Step 4：Sludge is fermented 25 ~ 30 days in anaerobic fermentation tank, and residues are anaerobic sludge（Biogas residue）, by fermenting
Tank drawing mechanism is delivered to the intermediate storage tank of sludge dewatering system.
Step 5：The biogas that anaerobic fermentation system is produced, is a kind of clean fuel, and main component is CH4、CO2、H2S、NH3、
The impurity such as steam and dust.The biogas that fermentation tank is produced sends into biogas main pipe by pipeline, by the biogas pressure of fermentation tank itself
Conveyed.The biogas of generation is processed through desulfurization dewatering system first.Air accumulator is sent into through the biogas of purified treatment to enter
Row storage.Biogas is used for making brick from sludge system such as tunnel cave as clean energy resource.
Step 6：Conditioned dose of conditioning of anaerobic sludge is modified, is directly dehydrated by belt filter press press filtration fast deep.Deep
Moisture content 55% or so after degree dehydration.
Step 7：Deep dehydration sludge is sent to drying device buffer bin, delivers to drying device each unit by cloth spiral
Interior.Using flue gas in baked brick tunnel kiln as drying device thermal source.After drying, sludge falls into Belt Conveying by overflow outlet
Machine, delivers to collection feed bin storage.Moisture percentage in sewage sludge 30% or so after drying.
Step 8：Dry the size-reduced machine of sludge to crush, the dewatered sludge powder of particle diameter 20-40 mesh is obtained.
Step 9：Bar sludge powder is mixed by a certain percentage with architecture sediment, sludge content 40-60%, and adds a small amount of interpolation
Agent, after mixing, sends into aging bunker ageing.
Step 10：Ageing material is squeezed into by vacuum extruder after roller pair breaking crusher machine, biaxial rneader stirring uniformly
Type, is obtained adobe.
Step 11：Tunnel cave is sent in adobe, and fired brick is made in drying, roasting.900-1000 DEG C of sintering temperature, during roasting
Between 2 hours.Wet adobe is dried using residual heat of tunnel kiln.
It should be appreciated that above example is only in order to illustrate technical scheme, rather than a limitation, to ability
For field technique personnel, the technical scheme described in above-described embodiment can be modified, or special to which part technology
Levying carries out equivalent；And these modifications and replacement, should all belong to the protection domain of claims of the present invention.
Claims (10)
1. a kind of municipal sludge prepares biogas and produces the method for fired brick, it is characterised in that comprise the following steps：
A. municipal sludge is sent in dry-type anaerobic fermentation tank, and steam, city is sent into from steam boiler to dry-type anaerobic fermentation tank
Political affairs sludge carries out dry-type anaerobic fermentation, produces biogas and anaerobic fermentation sludge after fermentation；
B. the anaerobic fermentation sludge conditioning is modified and be dehydrated, send into drying device and be dried and then carry out crushing and is done
Sludge powder；
C. the dewatered sludge powder is mixed with architecture sediment and extrusion molding is adobe；
D. the adobe is sent in making brick from sludge system, drying, roasting are obtained fired brick；
Flue gas in the making brick from sludge system is produced after municipal sludge fermentation simultaneously as steam boiler and the thermal source of drying device
Raw biogas is used as the heating fuel of making brick from sludge system.
2. municipal sludge according to claim 1 prepares biogas and produces the method for fired brick, it is characterised in that：Municipal administration is dirty
After mud mixes afforestation rubbish, then it is admitted in dry-type anaerobic fermentation tank and carries out dry-type anaerobic fermentation.
3. municipal sludge according to claim 1 prepares biogas and produces the method for fired brick, it is characterised in that：Described detest
Aerobe fermentation sludge is dehydrated using belt filter press, and the anaerobic fermentation moisture percentage in sewage sludge after dehydration is down to less than 55%.
4. municipal sludge according to claim 1 prepares biogas and produces the method for fired brick, it is characterised in that：Described detest
After aerobe fermentation drying sludge, its moisture percentage in sewage sludge is down to less than 30%.
5. municipal sludge according to claim 4 prepares biogas and produces the method for fired brick, it is characterised in that：After drying
Anaerobic fermentation sludge crush after the particle diameter of dewatered sludge powder that obtains be 20 ~ 40 mesh.
6. municipal sludge according to claim 1 prepares biogas and produces the method for fired brick, it is characterised in that：Described dry
Sludge powder is crushed using double-roll crusher after being mixed with architecture sediment.
7. municipal sludge according to claim 1 prepares biogas and produces the method for fired brick, it is characterised in that：Described dry
Sludge powder is mixed with architecture sediment, and wherein the percentage by weight of dewatered sludge powder is 40 ~ 60%.
8. municipal sludge according to claim 1 prepares biogas and produces the method for fired brick, it is characterised in that：Described dry
Sludge powder adopts bipolar extrusion under vacuum machine extrusion molding with architecture sediment.
9. municipal sludge according to claim 1 prepares biogas and produces the method for fired brick, it is characterised in that：Described dry
The fermentation temperature of formula anaerobic fermentation is 35 DEG C or 55 DEG C, fermentation period 25 ~ 30 days.
10. municipal sludge according to claim 1 prepares biogas and produces the method for fired brick, it is characterised in that：Described
The sintering temperature of adobe is 900 ~ 1000 DEG C.
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| CN201510251960.XA CN104843962B (en) | 2015-05-18 | 2015-05-18 | Municipal sludge prepares biogas and produces the method for fired brick |
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| CN201510251960.XA CN104843962B (en) | 2015-05-18 | 2015-05-18 | Municipal sludge prepares biogas and produces the method for fired brick |
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| CN104843962B true CN104843962B (en) | 2017-03-08 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105948445B (en) * | 2016-06-30 | 2018-10-09 | 浙江环耀环境建设有限公司 | A kind of leather waste water sludge treatment technique |
| CN106699112A (en) * | 2016-12-06 | 2017-05-24 | 广州市科恩电脑有限公司 | Method for manufacturing bricks by utilizing building waste |
| CN107056238A (en) * | 2017-04-10 | 2017-08-18 | 河南永泽环境科技有限公司 | A kind of method of anaerobic sludge digestion biogas residue brickmaking |
| CN107721107A (en) * | 2017-12-04 | 2018-02-23 | 祥达建设有限公司 | One kind is used for municipal sludge treatment equipment and method |
| CN108101510A (en) * | 2017-12-25 | 2018-06-01 | 合肥佳安建材有限公司 | A kind of production method of sludge brick |
| CN109910158A (en) * | 2018-12-11 | 2019-06-21 | 鞍山千华环保有限公司 | Utilize the method and production line of municipal sludge production lightweight assembled wallboard |
| CN109336554A (en) * | 2018-12-18 | 2019-02-15 | 上海市建筑科学研究院 | A kind of test simulation blank-making method using original state sludge baked brick |
| CN110668788A (en) * | 2019-10-17 | 2020-01-10 | 湖北玉鑫新型墙材有限公司 | Method for making bricks by using sludge wastewater |
| CN111848015A (en) * | 2020-07-21 | 2020-10-30 | 蚌埠龙淮建筑科技有限公司 | Method for preparing foaming wall material by using municipal sludge |
| CN112430122B (en) * | 2020-10-28 | 2023-06-30 | 福建省南安盈晟新型墙体材料有限公司 | High-efficiency energy-saving production method of non-clay sintered bricks |
| CN113182313B (en) * | 2021-03-01 | 2023-04-07 | 同济大学 | Multi-source organic solid waste disposal system and method for recycling pollutants |
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| CN102390913A (en) * | 2011-08-15 | 2012-03-28 | 重庆巨康建材有限公司 | Biodegradation-based sludge brick-making technology |
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Inventor after: Yang Xiaobing Inventor after: Lu Zhe Inventor after: Wang Chunxia Inventor after: Wang Yanjie Inventor after: Lu Shu Inventor before: Yang Xiaobing |
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