CN101851520A - 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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- CN101851520A CN101851520A CN201010159908A CN201010159908A CN101851520A CN 101851520 A CN101851520 A CN 101851520A CN 201010159908 A CN201010159908 A CN 201010159908A CN 201010159908 A CN201010159908 A CN 201010159908A CN 101851520 A CN101851520 A CN 101851520A
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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 sludge pyrolysis gas fractional condensation and reclaim the bio oil 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 mud thermochemistry is utilized disposal technology, has numerous advantages 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 big, operating requirement is high, and energy consumption is higher relatively, present research and development both domestic and external focus 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 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 pyrolysis oil properties instability, the quality of influence oil.Improve the pyrolysis oil quality, just must separate purification pyrolysis oil.
At present domesticly adopt simple single-stage condensing mode for obtaining of pyrolysis oil.Because pyrolysis oil is wide boiling point mixture, is used alone the product component complexity that condensing mode obtains, quality is lower.Seek out high quality oils, must separate purification, and the later stage purification technique can cause cost to increase greatly, be unfavorable for the commercialization popularization.
Summary of the invention
Technical problem: at 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 system oil process, can directly obtain light component and heavy component in the pyrolysis oil simultaneously, reduce the difficulty and the cost of follow-up upgrading operation greatly.
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 heavy constituent material wherein is condensed to separate and enters the mink cell focus storage tank, and noncondensing gas does not enter second stage condenser; Noncondensing gas is not cooled off by the two-stage spray in the condenser of the second stage, temperature is reduced to 40～70 ℃, light constituent material liquefaction wherein enters the lightweight oil storage tank, the lightweight oil that obtains flows out from outlet at bottom as processed oil through heat exchange cooling back is a part of, 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 the 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 after being cooled off by the two-stage spray.Adopt spray refrigerative mode can guarantee the quick cooling of pyrolysis gas, 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 separating of heavy constituent and light constituent simultaneously, not only can improve the productive rate and the quality of pyrolysis oil, reduce the later stage simultaneously the isolating cost of pyrolysis oil upgrading.
Description of drawings
Fig. 1 is a system schematic of the present invention, among the figure: 1, first step condenser; 2, second stage condenser; 3, control valve; 4, recycle pump; 5, lightweight oil storage tank; 6, mink cell focus storage tank.
Embodiment
The present invention is used for sludge pyrolysis gas fractional condensation and reclaims bio oil, and system mainly is made up of first step condenser 1, second stage condenser 2, control valve 3, lightweight oil storage 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 becomes popular and separates the gas product, and tube side is walked water coolant.Gas in first step condenser 1 residence time greater than 3 seconds.The bottom of first step condenser 1 is provided with the gas inlet, and the top is provided with 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 ℃, heavy constituent material wherein (is mainly the macromole oxygenatedchemicals, 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.
Claims (3)
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 ℃, heavy constituent material wherein is condensed to separate and enters mink cell focus storage tank (6), and noncondensing gas does not enter second stage condenser (2); Noncondensing gas is not cooled off by the two-stage spray in second stage condenser (2), temperature is reduced to 40～70 ℃, light constituent material liquefaction wherein enters lightweight oil storage tank (5), the lightweight oil that obtains flows out from outlet at bottom as processed oil through heat exchange cooling back is a part of, 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).
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) adopts recuperative heat exchanger, and second stage condenser (2) adopts the spray-type cooling tower.
3. a kind of sludge pyrolysis gas fractional condensation method for recycling biological oil according to claim 1 and 2 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 |
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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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| CN2010101599089A CN101851520B (en) | 2010-04-29 | 2010-04-29 | Sludge pyrolysis gas fractional condensation method for recycling biological oil |
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| CN101851520A true CN101851520A (en) | 2010-10-06 |
| CN101851520B CN101851520B (en) | 2013-04-10 |
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Cited By (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 |
| CN109289225A (en) * | 2018-09-12 | 2019-02-01 | 中科钢研节能科技有限公司 | A kind of device and method of condensing recovery pyrolysis gas and application |
| CN110124595A (en) * | 2019-06-13 | 2019-08-16 | 江苏可奥熙光学材料科技有限公司 | A kind of lens monomer reaction kettle high-efficiency condensation device |
| 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 |
| 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 |
| WO2022257412A1 (en) * | 2021-06-07 | 2022-12-15 | 东南大学 | Pyrolytic bio-oil fractional condensation device and method with self-circulating cooling medium |
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 |
-
2010
- 2010-04-29 CN CN2010101599089A patent/CN101851520B/en not_active Expired - Fee Related
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 |
Cited By (10)
| 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 |
| CN109289225A (en) * | 2018-09-12 | 2019-02-01 | 中科钢研节能科技有限公司 | A kind of device and method of condensing recovery pyrolysis gas and application |
| 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 |
| CN110124595A (en) * | 2019-06-13 | 2019-08-16 | 江苏可奥熙光学材料科技有限公司 | A kind of lens monomer reaction kettle high-efficiency condensation device |
| 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 |
| WO2022257412A1 (en) * | 2021-06-07 | 2022-12-15 | 东南大学 | Pyrolytic bio-oil fractional condensation device and method with self-circulating 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 |
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| CN101851520B (en) | 2013-04-10 |
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