CN103466912A - Process and device for sludge pyrolysis - Google Patents
Process and device for sludge pyrolysis Download PDFInfo
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- CN103466912A CN103466912A CN2013104532737A CN201310453273A CN103466912A CN 103466912 A CN103466912 A CN 103466912A CN 2013104532737 A CN2013104532737 A CN 2013104532737A CN 201310453273 A CN201310453273 A CN 201310453273A CN 103466912 A CN103466912 A CN 103466912A
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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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 invention relates to a process and device for sludge pyrolysis. The device is characterized by comprising a gas retort, a waste heat drying oven, a deodorization system, a purification system and a control system. A combustor is arranged on the lower portion of the hearth of the gas retort, and the hearth of the gas retort is connected with the waste heat drying oven. Wood chips or dry sludge particles are added to sludge to be mixed evenly, filter pressing is carried out, and sludge pressing blocks are manufactured. The sludge pressing blocks are pre-dried in the waste heat drying oven, and are contained in the inner kettle of the gas retort for carbonization, gas generated by the carbonization is separated by the purification system, and combustible gas is manufactured for heating the gas retort. Destructive distillation solid residues are used for the filtering and deodorization of combustion tail gas in the gas retort. A low-temperature carbonization technology is adopted, harmless utilization and recycling utilization are carried out on the sludge, the combustible gas generated in the low-temperature carbonization process can be used for heating the gas retort, resources are cyclically utilized and recycled, energy consumption in sludge treatment is reduced, the pollution of the sludge treatment on environment is reduced, secondary products with a high added-value are produced, and economic benefits and social benefits are achieved.
Description
Technical field
The present invention relates to a kind for the treatment of process and device of mud and sewage, especially relate to a kind of pyrolyzing sludge technique and device.
Background technology
Along with the fast development of China's economy, the quantity discharged of sewage is increasing, and sewage treatment capacity and wastewater treatment rate are also improving constantly, and mud is as the byproduct of sewage disposal, if process and will cause serious secondary pollution not in time.Because sludge yield is larger, water ratio is high, contains a large amount of organic matters, germ, parasite and heavy metal etc., if process mishandlingly, can bring serious secondary pollution to environment.The sludge treatment modes such as traditional landfill, sludge composting, agricultural and sludge incineration can't meet the processing of existing mud, by the national policy of " innoxious, resource utilization, energy-saving and cost-reducing, low-carbon environment-friendly, ", the recycling of mud becomes the thoroughly effective way of radical cure of mud.
At recycling sludge, utilize in process, the sludge drying power consumption is huge, if mud per ton adopts heating, drying, the wet mud that one ton of water ratio is 85% is dried to 10% needs 64.5 ten thousand kilocalories of power consumptions, needs 750 kilowatts of power consumptions, needs the cost dropped into to be no less than 350 yuan/tons, after even mud is dried, because chemical pollutant wherein, heavy metal etc. can produce the poison gas Dioxins in burning, form secondary pollution, still need investment to administer; If landfill also can produce soil cancer and polluted underground water.
Summary of the invention
The applicant is for above-mentioned problem, be studied improvement, a kind of pyrolyzing sludge technique and device are provided, the technique advantages of simple, mud is carried out to innoxious, recycling fully, and resource is reclaimed in recycle, reduces the energy consumption in sludge treatment, reduce mud process in to the pollution of environment, and the byproduct of output high added value.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of pyrolyzing sludge device, comprise gas retort, 1 ~ 4 residual heat drying stove and Controlling System, be provided with the interior still of anoxybiotic sealing in described gas retort burner hearth, the bottom of described gas retort burner hearth is provided with burner, the outlet of described gas retort burner hearth connects the import of described residual heat drying stove, and the outlet of residual heat drying stove connects deodoration system by induced draft fan; In described gas retort, the production well of still connects the import of purification system by vacuum fan, and the outlet of described purification system connects the inlet mouth of described burner.
Further:
The interior still of described gas retort is connected with nitrogen replaceable equipment
Deodoration system comprises spray adsorption unit and filtration unit, in described spray adsorption unit, is filled with the destructive distillation solid residue, in described filtration unit, is filled with active carbon fiber felt.
The injection direction of described burner is arranged on the tangential direction of described gas retort inboard wall of burner hearth and slightly is inclined upwardly.
Described purification system is oily-water seperating equipment.
A kind of pyrolyzing sludge technique, add wood chip or dewatered sludge particle by the mud of 60%≤water ratio≤85%, even in stirrer for mixing, and in pressure filter, press filtration, to water ratio≤50%, and is made the mud briquetting of strip and block; In the residual heat drying stove of mud briquetting through utilizing the gas retort waste heat, prebake is to water ratio≤10%, the interior still destructive distillation of the gas retort of packing into, and the Heating temperature of gas retort is at 400 ℃ ~ 550 ℃; The gas that destructive distillation generates is made inflammable gas, wood vinegar, wood tar oil through the isolation of purified of purification system, and inflammable gas is for the heating of gas retort; The destructive distillation solid residue is gac, for the filtration deodorization of gas retort combustion tail gas.
Further:
The weight percent of the mud of 60%≤water ratio≤85% and wood chip or dewatered sludge particle is: the mud of 60%≤water ratio≤85% accounts for 80% ~ 90%, and wood chip or dewatered sludge particle account for 10% ~ 20%.
The weight percent of the mud of 60%≤water ratio≤85% and wood chip or dewatered sludge particle is: the mud of 60%≤water ratio≤85% accounts for 85%, and wood chip or dewatered sludge particle account for 15%.
The size of described dewatered sludge particle is between 1 ~ 4 millimeter.
The present invention catches the characteristic of mud in mud drying process, do not offer medicine, without expense, drop into, mix a certain proportion of biomass, as wood chip etc., or mix the dewatered sludge of 1 ~ 4 mm granules, after uniform mixing, enter press filtration in pressure filter, carry out efficiently with " pressure " generation " baking ", one ton of mud power consumption of press filtration is compared with oven dry and will be reduced tens to tens times like this, input on cost is 22 yuan of left and right of mud per ton only, saved 15 times of left and right, in addition, ratio the weigh 1.2g/cm of mud after compacting
3, having improved batch, briquetting also is conducive to next procedure and carries out pyrolysis (destructive distillation), increases through air penetrability, and heating efficiency is higher than other technique and device., enter in the residual heat drying stove and carry out prebake to water ratio≤50% at sludge press filtration, reach water ratio≤10%, the temperature of prebake is about 200 ℃ of left and right; Proceed to again gas retort, Heating temperature≤550 ℃, the mud briquetting in the temperature rise period with regard to gasifying-carbonizing, the gas that gasification produces is through the isolation of purified of purification system, but dewatered sludge output 300 side's combustion gas per ton (combustion gas can be up to state standards), also can purify wood vinegar and 45 kilograms of wood tar oil of 150 kilograms from gas, but dry distillation charring is the gac of 300 kilograms of outputs also, under innoxious prerequisite, both had an economic benefit, social benefit (reaching the requirement of complete non-secondary pollution) is arranged again, can obtain the performance of enterprises of 1800 yuan/tons of dewatered sludges.Through thermal equilibrium test and calculate, technique of the present invention and device can accomplish that combustion gas that destructive distillation produces meets the demand of the required heat energy of destructive distillation, accomplish self-sufficient and without external heat source.
Technique effect of the present invention is:
A kind of pyrolyzing sludge technique disclosed by the invention and device, adopt the low-temperature pyrolysis technology, the technique advantages of simple, carry out innoxious, recycling fully to mud, and the inflammable gas that low-temperature pyrolysis produces can be used for the heating of gas retort, resource is reclaimed in recycle, reduce the energy consumption in sludge treatment, reduce mud process in to the pollution of environment, and byproducts such as the wood vinegar of output high added value, wood tar oil and gac, both had an economic benefit, social benefit was arranged again.
The accompanying drawing explanation
The structural representation that Fig. 1 is pyrolyzing sludge device of the present invention.
The vertical view that Fig. 2 is gas retort.
The schema that Fig. 3 is pyrolyzing sludge technique of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
As shown in Figure 1, 2, the pyrolyzing sludge device comprises 1,1 ~ 4 residual heat drying stove 4 of gas retort and Controlling System (not drawing in the drawings), operation by the whole device of Controlling System Collaborative Control, the quantity of residual heat drying stove 4 can be determined according to actual needs, is provided with in the present embodiment 1 residual heat drying stove 4.Be provided with the interior still 2 of anoxybiotic sealing in the burner hearth of gas retort 1, the bottom of gas retort 1 burner hearth is provided with 2 burners 3, burner 3 in the present embodiment is gas burner, the outlet of gas retort 1 burner hearth connects the import of residual heat drying stove 4, and the outlet of residual heat drying stove 4 connects deodoration system 100 by induced draft fan 5.Be provided with residual heat drying stove 4 and be 2 or 2 in device when above, can select the mode of connection of serial or parallel connection between residual heat drying stove 4, being connected in series the namely import of First residual heat drying stove 4 of mode is connected with the outlet of gas retort 1 burner hearth, the outlet of First residual heat drying stove 4 is connected with the import of next residual heat drying stove 4, and the outlet of last residual heat drying stove 4 connects deodoration system 100 by induced draft fan 5; The mode that is connected in parallel the namely import of many residual heat drying stoves 4 is connected with the outlet of gas retort 1 burner hearth simultaneously, the outlet of many residual heat drying stoves 4 connects deodoration system 100 by induced draft fan 5 simultaneously, the combustion tail gas of gas retort 1 enters deodoration system 100 after a residual heat drying stove 4 or many residual heat drying stoves 4, like this, the burner exhaust heat in gas retort 1 can be used for prebake mud briquetting in residual heat drying stove 4.In the present embodiment, the injection direction of burner 3 is arranged on the tangential direction of gas retort 1 inboard wall of burner hearth, and, the injection direction of burner 3 slightly is inclined upwardly, acclivitous angle can be determined as required, thereby the hot gas flow that makes burner 3 spray generation rises at gas retort 1 burner hearth internal screw, internally the heating of still 2 is more even, simultaneously, burner 3 sprays the heat produced, the destructive distillation of the mud briquetting in the 30% interior still for gas retort 12,70% waste heat flows in residual heat drying stove 4, for the prebake of mud briquetting.Deodoration system 100 comprises spray adsorption unit 6 and filtration unit 8, be filled with destructive distillation solid residue 601 in spray adsorption unit 6, destructive distillation solid residue 601 can be used the gac produced after destructive distillation, and resource is reclaimed in recycle, is filled with active carbon fiber felt 801 in filtration unit 8.The production well of the interior still 2 of gas retort 1 connects the import of purification system 12 by vacuum fan 11, the outlet of purification system 12 connects the inlet mouth of burner 3, purification system 12 is oily-water seperating equipment in the present embodiment, gas destructive distillation generated by purification system 12 is made inflammable gas, wood vinegar, wood tar oil through the isolation of purified of purification system 12, and inflammable gas can be delivered directly in burner 3 fuel as gas retort 1; The combustion tail gas of gas retort 1, under the effect of induced draft fan 5, flows through the heat energy of residual heat drying stove 4 as prebake, after the spray absorption of the final spray adsorption unit 6 through deodoration system 100 and the Filtration Adsorption of filtration unit 8, by the clean discharge of chimney 9.
In the present embodiment, the interior still 2 of gas retort 1 is connected with nitrogen replaceable equipment 10, when destructive distillation, when the oxygen in interior still 2 surpasses certain concentration, the nitrogen that nitrogen replaceable equipment 10 produces is filled with interior still 2, guarantees the anoxybiotic environment in interior still 2, avoids producing Dioxins.
In conjunction with Fig. 3, the pyrolyzing sludge technical process is as follows:
Embodiment 1,
The mud that is 85% by water ratio adds wood chip, and both weight percents are: the mud 85% that water ratio is 85%, wood chip 15%; Even in stirrer for mixing, in crawler blotter press, press filtration, to water ratio≤50%, and is made the mud briquetting of strip and block; The mud briquetting is packed in hanging basket the residual heat drying stove of packing into, the temperature of prebake is about 200 ℃, in residual heat drying stove through utilizing the gas retort waste heat, prebake is to water ratio≤10%, reinstalls destructive distillation in the interior still of gas retort, and the burner hearth Heating temperature of gas retort is 550 ℃; The gas that destructive distillation generates is made inflammable gas, wood vinegar, wood tar oil through the isolation of purified of purification system, the calorific value of inflammable gas can reach 4500 kilocalories, inflammable gas is delivered to burner, be directly used in the heating of gas retort, still the waste heat gas of 450 ℃ that has of gas retort enters in the residual heat drying stove, as the heat energy of prebake mud briquetting; The destructive distillation solid residue is gac, is filled in the spray adsorption unit 6 of deodoration system 100, for the filtration deodorization of gas retort combustion tail gas.
Embodiment 2,
The mud that is 70% by water ratio adds the dewatered sludge particle, and both weight percents are: the mud 80% that water ratio is 70%, dewatered sludge particle 20%; Even in stirrer for mixing, in crawler blotter press, press filtration, to water ratio≤50%, and is made the mud briquetting of strip and block; The mud briquetting is packed in hanging basket the residual heat drying stove of packing into, the temperature of prebake is about 200 ℃, in residual heat drying stove through utilizing the gas retort waste heat, prebake is to water ratio≤10%, reinstalls destructive distillation in the interior still of gas retort, and the burner hearth Heating temperature of gas retort is 500 ℃; The gas that destructive distillation generates is made inflammable gas, wood vinegar, wood tar oil through the isolation of purified of purification system, the calorific value of inflammable gas can reach 4500 kilocalories, inflammable gas is delivered to burner, be directly used in the heating of gas retort, still the waste heat gas of 450 ℃ that has of gas retort enters in the residual heat drying stove, as the heat energy of prebake mud briquetting; The destructive distillation solid residue is gac, is filled in the spray adsorption unit 6 of deodoration system 100, for the filtration deodorization of gas retort combustion tail gas.
Claims (9)
1. a pyrolyzing sludge device, it is characterized in that: comprise gas retort, 1 ~ 4 residual heat drying stove and Controlling System, be provided with the interior still of anoxybiotic sealing in described gas retort burner hearth, the bottom of described gas retort burner hearth is provided with burner, the outlet of described gas retort burner hearth connects the import of described residual heat drying stove, and the outlet of residual heat drying stove connects deodoration system by induced draft fan; In described gas retort, the production well of still connects the import of purification system by vacuum fan, and the outlet of described purification system connects the inlet mouth of described burner.
2. according to pyrolyzing sludge device claimed in claim 1, it is characterized in that: the interior still of described gas retort is connected with nitrogen replaceable equipment.
3. according to pyrolyzing sludge device claimed in claim 1, it is characterized in that: deodoration system comprises spray adsorption unit and filtration unit, in described spray adsorption unit, is filled with the destructive distillation solid residue, in described filtration unit, is filled with active carbon fiber felt.
4. according to pyrolyzing sludge device claimed in claim 1, it is characterized in that: the injection direction of described burner is arranged on the tangential direction of described gas retort inboard wall of burner hearth and slightly is inclined upwardly.
5. according to pyrolyzing sludge device claimed in claim 1, it is characterized in that: described purification system is oily-water seperating equipment.
6. a pyrolyzing sludge technique is characterized in that: the mud of 60%≤water ratio≤85% is added to wood chip or dewatered sludge particle, and even in stirrer for mixing, in pressure filter, press filtration, to water ratio≤50%, and is made the mud briquetting of strip and block; In the residual heat drying stove of mud briquetting through utilizing the gas retort waste heat, prebake is to water ratio≤10%, the interior still destructive distillation of the gas retort of packing into, and the Heating temperature of gas retort is at 400 ℃ ~ 550 ℃; The gas that destructive distillation generates is made inflammable gas, wood vinegar, wood tar oil through the isolation of purified of purification system, and inflammable gas is for the heating of gas retort; The destructive distillation solid residue is gac, for the filtration deodorization of gas retort combustion tail gas.
7. according to pyrolyzing sludge technique claimed in claim 6, it is characterized in that: the weight percent of the mud of 60%≤water ratio≤85% and wood chip or dewatered sludge particle is: the mud of 60%≤water ratio≤85% accounts for 80% ~ 90%, and wood chip or dewatered sludge particle account for 10% ~ 20%.
8. according to pyrolyzing sludge technique claimed in claim 7, it is characterized in that: the weight percent of the mud of 60%≤water ratio≤85% and wood chip or dewatered sludge particle is: the mud of 60%≤water ratio≤85% accounts for 85%, and wood chip or dewatered sludge particle account for 15%.
9. according to the described pyrolyzing sludge technique of claim 6 to 8 any one, it is characterized in that: the size of described dewatered sludge particle is between 1 ~ 4 millimeter.
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| CN2013104532737A CN103466912A (en) | 2013-09-29 | 2013-09-29 | Process and device for sludge pyrolysis |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693839A (en) * | 2014-01-07 | 2014-04-02 | 北京神雾环境能源科技集团股份有限公司 | Sludge treatment method and system |
| CN103725304A (en) * | 2014-01-23 | 2014-04-16 | 杭州互惠环保科技有限公司 | Sludge-crop straw joint disposal method based on fast pyrolysis |
| CN104099107A (en) * | 2014-03-05 | 2014-10-15 | 陆久余 | Sludge fuel production equipment |
| CN104496136A (en) * | 2014-12-19 | 2015-04-08 | 辽宁华孚环境工程股份有限公司 | Indirect heating and thermal desorption treatment device and method for oily solid waste |
| CN105038822A (en) * | 2015-07-13 | 2015-11-11 | 长沙泥宝环保有限公司 | Sludge clean treatment method and device |
| CN105601075A (en) * | 2016-03-25 | 2016-05-25 | 刘晓静 | Sludge pyrolysis carbonization technique and device |
| CN107162373A (en) * | 2017-06-21 | 2017-09-15 | 福建禹环境科技有限公司 | A kind of pig manure method of comprehensive utilization based on carbonization pyrolytic technique |
| CN107651684A (en) * | 2016-07-26 | 2018-02-02 | 广州城辉环保科技有限公司 | A kind of method that carbonization manufacture activated carbon is pyrolyzed with municipal sludge |
| CN107720948A (en) * | 2017-10-31 | 2018-02-23 | 沧源南华勐省糖业有限公司 | A kind of sugar production wastewater CASS activated sludge treatment methods |
| CN108423959A (en) * | 2018-02-11 | 2018-08-21 | 浙江合泽环境科技股份有限公司 | A kind of Sludge resource utilization method based on pyrohydrolysis-pyrolysis charring |
| CN109233909A (en) * | 2018-10-09 | 2019-01-18 | 东莞市汇盈生物科技有限公司 | A kind of method that the combustion gas that sludge cracking generates is recycled |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693839A (en) * | 2014-01-07 | 2014-04-02 | 北京神雾环境能源科技集团股份有限公司 | Sludge treatment method and system |
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| CN103725304A (en) * | 2014-01-23 | 2014-04-16 | 杭州互惠环保科技有限公司 | Sludge-crop straw joint disposal method based on fast pyrolysis |
| CN103725304B (en) * | 2014-01-23 | 2017-01-04 | 杭州互惠环保科技有限公司 | Sludge and crop straw co-treatment method based on rapid pyrolysis |
| CN104099107B (en) * | 2014-03-05 | 2016-04-20 | 陆久余 | Sludge fuel makes equipment |
| CN104099107A (en) * | 2014-03-05 | 2014-10-15 | 陆久余 | Sludge fuel production equipment |
| CN104496136A (en) * | 2014-12-19 | 2015-04-08 | 辽宁华孚环境工程股份有限公司 | Indirect heating and thermal desorption treatment device and method for oily solid waste |
| CN105038822A (en) * | 2015-07-13 | 2015-11-11 | 长沙泥宝环保有限公司 | Sludge clean treatment method and device |
| CN105601075A (en) * | 2016-03-25 | 2016-05-25 | 刘晓静 | Sludge pyrolysis carbonization technique and device |
| CN107651684A (en) * | 2016-07-26 | 2018-02-02 | 广州城辉环保科技有限公司 | A kind of method that carbonization manufacture activated carbon is pyrolyzed with municipal sludge |
| CN107162373A (en) * | 2017-06-21 | 2017-09-15 | 福建禹环境科技有限公司 | A kind of pig manure method of comprehensive utilization based on carbonization pyrolytic technique |
| CN107720948A (en) * | 2017-10-31 | 2018-02-23 | 沧源南华勐省糖业有限公司 | A kind of sugar production wastewater CASS activated sludge treatment methods |
| CN108423959A (en) * | 2018-02-11 | 2018-08-21 | 浙江合泽环境科技股份有限公司 | A kind of Sludge resource utilization method based on pyrohydrolysis-pyrolysis charring |
| CN109233909A (en) * | 2018-10-09 | 2019-01-18 | 东莞市汇盈生物科技有限公司 | A kind of method that the combustion gas that sludge cracking generates is recycled |
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Application publication date: 20131225 |