CN101851520B - Sludge pyrolysis gas fractional condensation method for recycling biological oil - Google Patents
Sludge pyrolysis gas fractional condensation method for recycling biological oil Download PDFInfo
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- CN101851520B CN101851520B CN2010101599089A CN201010159908A CN101851520B CN 101851520 B CN101851520 B CN 101851520B CN 2010101599089 A CN2010101599089 A CN 2010101599089A CN 201010159908 A CN201010159908 A CN 201010159908A CN 101851520 B CN101851520 B CN 101851520B
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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
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Abstract
The invention provides a sludge pyrolysis gas fractional condensation method for recycling biological oil. The method comprises the following steps: sludge pyrolyzate is processed by a ceramic filter to remove solid carbon residues and enters a primary condenser (1), the temperature drops to 300-400 DEG C, heavy components are condensed and separated out and enter a heavy-weight oil storage tank (6), and gasses which are not condensed enter a secondary condenser (2); and in the secondary condenser (2), the gasses not condensed are cooled by two stages of spraying so that the temperature drops to 40-70 DEG C, light components are liquefied and enter a light-weight oil storage tank (5), the obtained light-weight oil is cooled through heat exchange, part of the cooled light-weight oil flows out of the outlet at the bottom as the product oil, and the other part returns to the two-stage spray nozzles in the secondary condenser (2) via a control valve (3) under the action of a circulating pump (4). The invention can ensure sludge pyrolysis gas to be sufficiently condensed, thereby separating heavy components from light components. The invention enhances the yield and quality of pyrolysis oil, and reduces the cost for extracting and separating pyrolysis oil in later period.
Description
Technical field
The invention belongs to the derived energy chemical field, be specifically related to a kind of fractional condensation recovery of bio-oil from sludge pyrolysis gas technology.
Background technology
Along with the continuous expansion of municipal sewage treatment scale, the sewage disposal degree raises year by year, and sludge yield also sharply increases.Mud contains toxic organic compound, pathogenic microorganism and heavy metal, can produce serious harm to environment, as deals with improperly or untimely, can bring serious secondary pollution.Therefore, how effectively city sewage and sludge to be disposed, become the very important problem that concerns urban society and sustainable economic development.
Pyrolyzing sludge is that a kind of new sludge hot chemistry utilizes disposal technology, has the many merits such as environmental pollution is little, cost is low, resource high-efficiency recovery.Pyrolytic process is divided into low temperature pyrogenation (≤500 ℃) and high temperature pyrolysis.Because high temperature pyrolysis main equipment manufacture difficulty is large, operating requirement is high, and energy consumption is relatively high, present Research Emphasis both domestic and external is placed on the low temperature pyrogenation.The sludge at low temperature pyrolytic technique can overcome the shortcoming of traditional sludge method of disposal effectively.Because heavy metal accumulation good stability in solid residue, and temperature of reaction is low, avoid Dioxins and generated the district, NOx and SOx generate also seldom, can satisfy strict policies and regulations, can obtain valuable resource product in addition, so the low temperature pyrogenation technology is the internationally recognized recycling sludge thermochemistry disposal technology that the important application prospect is arranged.
The pyrolyzing sludge product comprises gas, solid, liquid three-phase.Wherein solid product can obtain by porcelain filter or cyclonic separator, and gas phase and liquid product need to be isolated incondensable gas and pyrolysis oil by condensing mode.Because the sludge components of sludge components complexity and different areas is widely different, the existing light component of the product liquid that pyrolyzing sludge obtains also has heavy component, causes the pyrolysis oil properties unstable, the quality of impact oil.Improve the pyrolysis oil quality, just must carry out separating-purifying to pyrolysis oil.
At present domesticly adopt simple single-stage condensing mode for obtaining of pyrolysis oil.Because pyrolysis oil is wide boiling point mixture, be used alone the product component complexity that condensing mode obtains, quality is lower.Want to obtain high quality oils, must carry out separating-purifying, and the later stage purification technique can cause cost greatly to increase, be unfavorable for the commercialization popularization.
Summary of the invention
Technical problem: for the deficiency of above sludge pyrolysis gas condensation separation method, the present invention proposes pyrolysis gas fractional condensation method for recycling biological oil in a kind of pyrolyzing sludge liquefaction process, can directly obtain simultaneously light component and heavy component in the pyrolysis oil, greatly reduce difficulty and the cost of follow-up upgrading operation.
Technical scheme: sludge pyrolysis gas fractional condensation method for recycling biological oil of the present invention is as follows:
The pyrolyzing sludge product at first enters first step condenser after porcelain filter is removed the solid carbon residue, temperature is reduced to 300～400 ℃, and restructuring wherein divides material to be condensed to separate and enters the mink cell focus storage tank, and noncondensing gas does not enter second stage condenser; In the condenser of the second stage not noncondensing gas by the two-stage spraying cooling, temperature is reduced to 40～70 ℃, light constituent material liquefaction wherein enters light oil tank, the lightweight oil that obtains flows out from outlet at bottom as processed oil through heat exchange cooling rear portion, and another part is returning two-stage spray nozzle in the condenser of the second stage through control valve under the effect of recycle pump.
Described first step condenser adopts recuperative heat exchanger, and second stage condenser adopts spray-type cooling tower.
Described first step condenser condenses temperature is controlled at 300～400 ℃, and gas residence time was greater than 3 seconds; Second stage condenser condenses temperature is controlled at 40～70 ℃, and gas residence time was greater than 3 seconds.
Light constituent material (main component is the straight chain hydrocarbon compound) is liquefied as lightweight oil behind the two-stage spraying cooling.The mode of employing spraying cooling can guarantee the quick cooling of pyrolysis gas, and fully the coagulable constituents in the condensed gas is realized the maximization of oily productive rate.
Beneficial effect: compared with prior art, advantage of the present invention is:
Adopt the condensed in two stages mode, indirect condensing and direct condensation are combined, can guarantee fully condensation of coagulable part in the sludge pyrolysis gas, realize simultaneously separating of restructuring minute and light constituent, not only can improve productive rate and the quality of pyrolysis oil, reduce simultaneously the cost of later stage to pyrolysis oil upgrading separation.
Description of drawings
Fig. 1 is system schematic of the present invention, among the figure: 1, first step condenser; 2, second stage condenser; 3, control valve; 4, recycle pump; 5, light oil tank; 6, mink cell focus storage tank.
Embodiment
The present invention is used for fractional condensation recovery of bio-oil from sludge pyrolysis gas, and system mainly is comprised of first step condenser 1, second stage condenser 2, control valve 3, light oil tank 5, mink cell focus storage tank 6 and recycle pump 4.
The pyrolyzing sludge product is at first removed the solid carbon residue through porcelain filter, and resultant product enters first step condenser 1.First step condenser 1 adopts recuperative heat exchanger, and heat exchanger shell pass is walked the pyrolysis gas product, and tube side is walked water coolant.Gas the 1 interior residence time of first step condenser greater than 3 seconds.The bottom of first step condenser 1 arranges the gas inlet, and the top arranges pneumatic outlet, and the bottom is established the mink cell focus outlet and is communicated with mink cell focus storage tank 6 by pipeline.Under the indirect condensing effect of pyrolysis gas water coolant in spiral coil cooling tube, temperature is reduced to 300～400 ℃, restructuring wherein divides material (to be mainly the macromole oxygenatedchemicals, such as oxygen acid, fat, aldehyde, ketone etc.) being condensed to separate enters mink cell focus storage tank 6, and noncondensing gas does not enter second stage condenser 2 from pneumatic outlet.
Second stage condenser 2 adopts spray-type cooling tower, is provided with the two-stage spray nozzle.Condenser 2 bottoms in the second stage arrange the gas inlet and are communicated with first step condenser 1 pneumatic outlet, and the top arranges the incondensable gas outlet, and the bottom is established liquid exit and is communicated with light oil tank 5 by pipeline.By the two-stage spraying cooling, temperature is reduced to 40～70 ℃ from the pyrolysis gas of first step condenser 1, and gas residence time was greater than 3 seconds.Light constituent material in the resultant product (main component is the straight chain hydrocarbon compound) liquefies, and becomes lightweight oil.Establish heat exchanger in the light oil tank 5 to take away heat, the lightweight oil part of collection flows out from outlet at bottom as processed oil; A part is returned the two-stage spray nozzle under the effect of recycle pump 4.By the aperture of adjusting control valve 3, realize the regulation and control of the solidifying amount of spray.
Claims (2)
1. sludge pyrolysis gas fractional condensation method for recycling biological oil, it is characterized in that: the pyrolyzing sludge product at first enters first step condenser (1) after porcelain filter is removed the solid carbon residue, temperature is reduced to 300～400 ℃, restructuring wherein divides material to be condensed to separate and enters mink cell focus storage tank (6), and noncondensing gas does not enter second stage condenser (2); In second stage condenser (2) not noncondensing gas by the two-stage spraying cooling, temperature is reduced to 40～70 ℃, light constituent material liquefaction wherein enters light oil tank (5), the lightweight oil that obtains flows out from outlet at bottom as processed oil through heat exchange cooling rear portion, and another part is returning two-stage spray nozzle in the second stage condenser (2) through control valve (3) under the effect of recycle pump (4);
Described first step condenser (1) adopts recuperative heat exchanger, and second stage condenser (2) adopts spray-type cooling tower.
2. a kind of sludge pyrolysis gas fractional condensation method for recycling biological oil according to claim 1 is characterized in that described first step condenser (1) condensing temperature is controlled at 300～400 ℃, and gas residence time was greater than 3 seconds; Second stage condenser (2) condensing temperature is controlled at 40～70 ℃, and gas residence time was greater than 3 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101599089A CN101851520B (en) | 2010-04-29 | 2010-04-29 | Sludge pyrolysis gas fractional condensation method for recycling biological oil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101599089A CN101851520B (en) | 2010-04-29 | 2010-04-29 | Sludge pyrolysis gas fractional condensation method for recycling biological oil |
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| Publication Number | Publication Date |
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| CN101851520A CN101851520A (en) | 2010-10-06 |
| CN101851520B true CN101851520B (en) | 2013-04-10 |
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| CN2010101599089A Expired - Fee Related CN101851520B (en) | 2010-04-29 | 2010-04-29 | Sludge pyrolysis gas fractional condensation method for recycling biological oil |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266864A (en) * | 2011-07-01 | 2011-12-07 | 中国科学院过程工程研究所 | Method for thermal decomposition refining and grading directional transformation of biomasses |
| CN102911691A (en) * | 2012-11-05 | 2013-02-06 | 天津大学 | Method for preparing bio-oil through supercritical pyrolysis of civil sludge |
| CN107142118A (en) * | 2017-04-14 | 2017-09-08 | 中国科学院广州能源研究所 | A kind of method that utilization sludge prepares sludge carbon-based material |
| CN109289225B (en) * | 2018-09-12 | 2021-02-19 | 国宏中晶集团有限公司 | Device and method for condensing and recycling pyrolysis gas and application |
| CN110124595B (en) * | 2019-06-13 | 2024-04-30 | 江苏可奥熙光学材料科技有限公司 | Lens monomer is high-efficient condensing equipment for reation kettle |
| CN112980492A (en) * | 2021-04-02 | 2021-06-18 | 广西博世科环保科技股份有限公司 | A multistage oil gas condensation recovery system for oiliness mud pyrolysis tail gas |
| CN113384913A (en) * | 2021-06-07 | 2021-09-14 | 东南大学 | Pyrolysis bio-oil fractional condensation device and method with self-circulation cooling medium |
| CN114874795A (en) * | 2022-04-27 | 2022-08-09 | 浙江长三角聚农科技开发有限公司 | Device and method for extracting tar and biomass oil from biomass pyrolysis gas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532785A (en) * | 2008-03-11 | 2009-09-16 | 广州迪森热能技术股份有限公司 | Rapid fuel gas condensation system with double-tower direct spray |
| CN101624531A (en) * | 2009-08-06 | 2010-01-13 | 东南大学 | Device for preparing bio-oil by utilizing biomass spouted fluidized bed through pyrolysis and fractional condensation |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532785A (en) * | 2008-03-11 | 2009-09-16 | 广州迪森热能技术股份有限公司 | Rapid fuel gas condensation system with double-tower direct spray |
| CN101624531A (en) * | 2009-08-06 | 2010-01-13 | 东南大学 | Device for preparing bio-oil by utilizing biomass spouted fluidized bed through pyrolysis and fractional condensation |
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| CN101851520A (en) | 2010-10-06 |
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