CN101700954A - Sludge pre-treatment method for preparing fuel gas - Google Patents
Sludge pre-treatment method for preparing fuel gas Download PDFInfo
- Publication number
- CN101700954A CN101700954A CN200910311274A CN200910311274A CN101700954A CN 101700954 A CN101700954 A CN 101700954A CN 200910311274 A CN200910311274 A CN 200910311274A CN 200910311274 A CN200910311274 A CN 200910311274A CN 101700954 A CN101700954 A CN 101700954A
- Authority
- CN
- China
- Prior art keywords
- mud
- fuel gas
- treatment
- sludge
- microwave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention is a sludge pre-treatment method for preparing fuel gas, relating to a sludge pre-treatment method and solving the problems of high cost and low yield of fuel gas in the current sludge pyrolyzation method for preparing fuel gas. The method comprises the following steps: 1) performing grinding treatment on sludge; and 2) performing micro-wave treatment on sludge to realize sludge pre-treatment. The method has simple process, low energy consumption and low cost. The gas total recovery rate is increased to 45-50% by using sludge after pre-treatment for preparing fuel gas (carbon monoxide and hydrogen gas), the fuel gas volume accounts for 60-70% of the obtained total volume, and the fuel gas yield is improved by about 40% compared with traditional pyrolyzated sludge.
Description
Technical field
The present invention relates to a kind of pretreatment process of mud, particularly the high-efficiency resource recycling of solid waste mud belongs to microwave irradiation technology and technical field of environmental science.
Background technology
To be sewage work carry out the residue of the floating foam gained that the sedimentable matter that produces in the treating processes and sewage surface drift out to sewage to mud.Simply say, it be a kind of boundary in inorganic and organic between semi-solid waste, be the very complicated potentially dangerous material of a kind of composition, carry out in the municipal sewage sludge of second-stage treatment in China, 90% multi-source is in primary sludge and excess sludge.Existing method by pyrolysis mud, with the utilization again of realization mud, for example mud is carried out pyrolysis processing after, produce and obtain fuel gas (carbon monoxide and hydrogen), to satisfy the needs of daily productive life.Traditional pyrolyzing sludge technology, mainly be to concentrate on low temperature pyrogenation mud, the mode of its indirect heating mud, make in heat-processed, the waste of many heats is arranged, and cost is higher, and temperature-rise period is slow, the product that obtains mainly is mink cell focus and a small amount of gas, and the output of fuel gas is lower.
Summary of the invention
The problem that the present invention yields poorly for the cost height that solves the existing method for pyrolysis of producing the mud of fuel gas and exist and fuel gas, and a kind of sludge pre-treatment method of producing fuel gas is provided.
The sludge pre-treatment method of producing fuel gas carries out according to following steps: be to add microwave absorbing material in 70%～80% the mud mud to mix to water ratio one,, putting into shredder then grinds and obtains the mud mixture that particle diameter is 0.2～0.4mm, wherein, the mass ratio of mud and microwave absorbing material is 5～10: 1, and microwave absorbing material is gac, silicon carbide, graphite or pyrolysis residue; Two, mud mixture carries out microwave treatment, and the microwave temperature is 900～1000 ℃, and the microwave time is 15～30min, and microwave irradiation power 1～20kw has promptly realized the pre-treatment of mud.
The inventive method can also add pH agent and/or catalyzer in the mud of step 1, wherein the pH agent is calcium oxide or calcium hydroxide, the mass ratio of pH agent and mud is 1: 10～15, and catalyzer is copper sulfate or ferric oxide, and the mass ratio of changing agent and mud is 1: 10～20.
The inventive method adds suitable microwave absorbing material to change the particle diameter of mud in mud, can also add the PH agent to change the pH value of mud, perhaps adds catalyzer to strengthen pre-treatment, uses microwave-heating mud again, to produce fuel gas; Grind the particle diameter that has reduced mud among the present invention, greatly reduce the pyrolytic temperature, also reduced pyrolysis gas and be subjected to the diffusional resistance that grain size brings, it is faster to make that the present invention obtains the mud aerogenesis, and pyrolysis efficient is also higher; Pyrolysis transformation efficiency and pyrolysis organic in the mud are warm eventually proportional, pyrolysis solid residue (pyrolysis ash) is inverse ratio with the whole temperature of pyrolysis, added the micro-wave energy absorbing material in the inventive method, can make mud reach the required high temperature (more than 900 ℃) of reaction at short notice, improved the pyrolysis transformation efficiency of organic matter in the mud, reduce the pyrolysis solid residue, thereby can improve the output of fuel gas; Add the initial cracking temperature that catalyzer can reduce mud among the present invention, the ratio of carbon monoxide and hydrogen in increase gas yield and the gas.
Method technology of the present invention is simple, and it is low to consume energy, and cost is low; The present invention obtains mud and obtain product liquid after condensation, a large amount of non-condensing gas and pyrolysis residue, product liquid obtains oil by oily water separation, further processing can be done the fuel utilization, non-condensing gas then can further be handled, both can be used as fuel gas then, also can be used as industrial chemicals, the pyrolysis residue, can further produce as sorbent material, also can be used as other combustion materials, produce fuel gas (carbon monoxide and hydrogen) with the mud after the inventive method processing, the gas total recovery has reached 45%～50%, wherein fuel gas accounts for 60%～70% of gained volume of gas, compares with traditional pyrolysis mud, and the output of fuel gas has improved about 40%.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: the sludge pre-treatment method that present embodiment is produced fuel gas carries out according to following steps: be to add microwave absorbing material in 70%～80% the mud mud to mix to water ratio one,, putting into shredder then grinds and obtains the mud mixture that particle diameter is 0.2～0.4mm, wherein, the mass ratio of mud and microwave absorbing material is 5～10: 1, and microwave absorbing material is gac, silicon carbide, graphite or pyrolysis residue; Two, mud mixture carries out microwave treatment, and the microwave time is 15～30min, and microwave irradiation power 1～20kw has promptly realized the pre-treatment of mud.
Mud described in the present embodiment is that Sewage Plant is through the dewatered sludge after the press filtration.
The temperature of mud mixture was 900～1000 ℃ when thermometric was known microwave treatment in the present embodiment step 2 in real time with infrared thermometer.
Produce fuel gas (carbon monoxide and hydrogen) with the mud after the pretreatment process processing of present embodiment, the gas total recovery has reached 45%～50%, fuel gas accounts for 60%～70% of gained volume of gas, the output height of fuel gas, compare with traditional pyrolysis mud, the output of fuel gas has improved 30%～40%.
The needed time of mud aerogenesis is not shortening more than 1/5 on the pre-treatment basis after the present embodiment pre-treatment, produces the gas total recovery and surpasses 46%, be before the pre-treatment more than 1.3 times; Carbon monoxide and hydrogen total amount are 60～70% in the gas, be before the pre-treatment more than 1.5 times.
Embodiment two: what present embodiment and embodiment one were different is: can also add pH agent and/or catalyzer in the mud of step 1, wherein the pH agent is calcium oxide or calcium hydroxide, the mass ratio of pH agent and mud is 1: 10～15, catalyzer is copper sulfate or ferric oxide, and the mass ratio of catalyzer and mud is 1: 10～20.Other step and parameter are identical with embodiment one.
The pH agent of present embodiment makes the pH of mud reach 7.5～9.0.
Embodiment three: what present embodiment and embodiment one to two were different is: grind in the step 1 and obtain the mud mixture that particle diameter is 0.2～0.4mm.Other step and parameter are identical with embodiment one to two.
Embodiment four: what present embodiment and embodiment one to two were different is: grind in the step 1 and obtain the mud mixture that particle diameter is 0.2mm.Other step and parameter are identical with embodiment one to two.
Embodiment five: what present embodiment and embodiment one to two were different is: grind in the step 1 and obtain the mud mixture that particle diameter is 0.4mm.Other step and parameter are identical with embodiment one to two.
Embodiment six: what present embodiment and embodiment one to two were different is: grind in the step 1 and obtain the mud mixture that particle diameter is 0.3mm.Other step and parameter are identical with embodiment one to two.
Embodiment seven: what present embodiment and embodiment one to six were different is: the microwave time is 17～25min in the step 2, microwave irradiation power 2～5kw.Other step and parameter are identical with embodiment one to six.
Embodiment eight: what present embodiment and embodiment one to six were different is: the microwave time is 15min in the step 2, microwave irradiation power 5kw.Other step and parameter are identical with embodiment one to six.
Embodiment nine: what present embodiment and embodiment one to six were different is: the microwave time is 30min in the step 2, microwave irradiation power 2kw.Other step and parameter are identical with embodiment one to six.
Embodiment ten: what present embodiment and embodiment one to six were different is: the microwave temperature is 960 ℃ in the step 2, and the microwave time is 21nin, microwave irradiation power 4kw.Other step and parameter are identical with embodiment one to six.
Embodiment 11: the sludge pre-treatment method that present embodiment is produced fuel gas carries out according to following steps: be to add microwave absorbing material in 75% the mud mud to mix to water ratio one,, putting into shredder then grinds and obtains the mud mixture that particle diameter is 0.3mm, wherein, the mass ratio of mud and microwave absorbing material is 8: 1, and microwave absorbing material is a gac; Two, mud mixture carries out microwave treatment, and the microwave time is 18min, and microwave irradiation power 4kw has promptly realized the pre-treatment of mud.
Mud described in the present embodiment is that Sewage Plant is through the dewatered sludge after the press filtration.
With infrared thermometer carry out real-time thermometric as can be known in the present embodiment step 2 during microwave treatment temperature of mud mixture be 960 ℃.
Produce fuel gas (carbon monoxide and hydrogen) with the mud after the method processing of present embodiment, fuel gas accounts for 65.4% of gained volume of gas, and the output height of fuel gas is compared with traditional pyrolysis mud, and the output of fuel gas has improved 33%.
The needed time of mud aerogenesis has shortened more than 1/5 on the basis of grinding after the present embodiment pre-treatment, and producing the gas total recovery is 46.2%, is 1.3 times before the pre-treatment; Carbon monoxide and hydrogen total amount are 62.2% in the gas, are 1.5 times before the pre-treatment.
Embodiment 12: what present embodiment and embodiment ten were different is to add the pH agent in the mud of step 1, and wherein the pH agent is a calcium oxide, and the mass ratio of pH agent and mud is 1: 12.Other step and parameter are identical with embodiment ten.
Produce fuel gas (carbon monoxide and hydrogen) with the mud after the method processing of present embodiment, fuel gas accounts for 66.2% of gained volume of gas, and the output height of fuel gas is compared with traditional pyrolysis mud, and the output of fuel gas has improved 35%.
The needed time of mud aerogenesis is not shortening more than 1/5 on the pre-treatment basis after the present embodiment pre-treatment, and producing the gas total recovery is 47.6%, is 1.35 times before the pre-treatment; Carbon monoxide and hydrogen total amount are 63.9% in the gas, are 1.5 times before the pre-treatment.
Embodiment 13: what present embodiment and embodiment ten were different is to add catalyzer in the mud of step 1, and wherein catalyzer is a copper sulfate, and the mass ratio of catalyzer and mud is 1: 15.Other step and parameter are identical with embodiment ten.
Produce fuel gas (carbon monoxide and hydrogen) with the mud after the method processing of present embodiment, fuel gas accounts for 67.2% of gained volume of gas, and the output height of fuel gas is compared with traditional pyrolysis mud, and the output of fuel gas has improved 38%.
The needed time of mud aerogenesis is not shortening more than 1/5 on the pre-treatment basis after the present embodiment pre-treatment, produces the gas total recovery and has reached 47%, is 1.35 times before the pre-treatment; Carbon monoxide and hydrogen total amount are 60% in the gas, are 1.5 times before the pre-treatment.
Embodiment 14: what present embodiment and embodiment ten were different is to add pH agent and catalyzer in the mud of step 1, wherein the pH agent is a calcium hydroxide, the mass ratio of pH agent and mud is 1: 13, catalyzer is copper sulfate or ferric oxide, and the mass ratio of catalyzer and mud is 1: 12.Other step and parameter are identical with embodiment ten.
Produce fuel gas (carbon monoxide and hydrogen) with the mud after the method processing of present embodiment, fuel gas accounts for 68.5% of gained volume of gas, and the output height of fuel gas is compared with traditional pyrolysis mud, and the output of fuel gas has improved 40%.
The needed time of mud aerogenesis is not shortening more than 1/5 on the pre-treatment basis after the present embodiment pre-treatment, produces the gas total recovery and reaches 49%, is 1.4 times before the pre-treatment; Carbon monoxide and hydrogen total amount are 60% in the gas, are 1.5 times before the pre-treatment.
Claims (6)
1. sludge pre-treatment method of producing fuel gas, the sludge pre-treatment method that it is characterized in that being used for producing fuel gas carries out according to following steps: be that 70%～80% mud adds microwave absorbing material and mixes to water ratio one,, putting into shredder then grinds and obtains the mud mixture that particle diameter is 0.1～0.5mm, wherein, the mass ratio of mud and microwave absorbing material is 5～10: 1, and microwave absorbing material is gac, silicon carbide, graphite or pyrolysis residue; Two, mud mixture carries out microwave treatment, and the microwave time is 15～30min, and microwave irradiation power 1～20kw has promptly realized the pre-treatment of mud.
2. a kind of sludge pre-treatment method of producing fuel gas according to claim 1, it is characterized in that in the mud of step 1, to add pH agent and/or catalyzer, wherein the pH agent is calcium oxide or calcium hydroxide, the mass ratio of pH agent and mud is 1: 10～15, catalyzer is copper sulfate or ferric oxide, and the mass ratio of catalyzer and mud is 1: 10～20.
3. a kind of sludge pre-treatment method of producing fuel gas according to claim 1 and 2 is characterized in that grinding obtains the mud mixture that particle diameter is 0.2～0.4mm in the step 1.
4. a kind of sludge pre-treatment method of producing fuel gas according to claim 1 and 2 is characterized in that grinding obtains the mud mixture that particle diameter is 0.3mm in the step 1.
5. a kind of sludge pre-treatment method of producing fuel gas according to claim 3 is characterized in that the microwave temperature is 900～1000 ℃ in the step 2, and the microwave time is 17～25min, microwave irradiation power 2～5kw.
6. a kind of sludge pre-treatment method of producing fuel gas according to claim 3 is characterized in that the microwave time is 18min in the step 2, microwave irradiation power 4kw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910311274A CN101700954A (en) | 2009-12-11 | 2009-12-11 | Sludge pre-treatment method for preparing fuel gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910311274A CN101700954A (en) | 2009-12-11 | 2009-12-11 | Sludge pre-treatment method for preparing fuel gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101700954A true CN101700954A (en) | 2010-05-05 |
Family
ID=42155887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910311274A Pending CN101700954A (en) | 2009-12-11 | 2009-12-11 | Sludge pre-treatment method for preparing fuel gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101700954A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199434A (en) * | 2011-04-13 | 2011-09-28 | 西安建筑科技大学 | Method for quick pyrolysis of coal direct liquefaction residues by utilizing microwaves |
| CN102757163A (en) * | 2012-07-30 | 2012-10-31 | 哈尔滨工业大学 | Method for controlling NH3 and HCN in fuel gas preparation by microwave pyrolysis of sludge |
| CN105417918A (en) * | 2015-12-08 | 2016-03-23 | 深圳大学 | Technical method for treating civil sludge through microwave pyrolysis |
| CN105670658A (en) * | 2016-03-22 | 2016-06-15 | 北京神雾环境能源科技集团股份有限公司 | System and method for treating sludge |
| CN106045242A (en) * | 2016-05-20 | 2016-10-26 | 中国科学院武汉岩土力学研究所 | Method for preparing lightweight materials from municipal dewatered sludge through water glass and microwave dual curing |
| CN106077039A (en) * | 2016-06-29 | 2016-11-09 | 程秀 | The processing method of municipal refuse |
| WO2021018246A1 (en) * | 2019-08-01 | 2021-02-04 | 安能聚绿能股份有限公司 | Method for rapidly manufacturing organic fertilizer |
| CN114733527A (en) * | 2022-04-08 | 2022-07-12 | 同济大学 | Preparation method of Ca-Ni ash-based catalyst and hydrogen-rich synthesis gas |
-
2009
- 2009-12-11 CN CN200910311274A patent/CN101700954A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199434A (en) * | 2011-04-13 | 2011-09-28 | 西安建筑科技大学 | Method for quick pyrolysis of coal direct liquefaction residues by utilizing microwaves |
| CN102199434B (en) * | 2011-04-13 | 2013-06-05 | 西安建筑科技大学 | Method for direct liquefaction residues of coal by utilizing microwaves quick pyrolysis |
| CN102757163A (en) * | 2012-07-30 | 2012-10-31 | 哈尔滨工业大学 | Method for controlling NH3 and HCN in fuel gas preparation by microwave pyrolysis of sludge |
| CN105417918A (en) * | 2015-12-08 | 2016-03-23 | 深圳大学 | Technical method for treating civil sludge through microwave pyrolysis |
| CN105417918B (en) * | 2015-12-08 | 2018-08-31 | 深圳大学 | Microwave-heating handles the technical method of municipal sludge |
| CN105670658A (en) * | 2016-03-22 | 2016-06-15 | 北京神雾环境能源科技集团股份有限公司 | System and method for treating sludge |
| CN106045242A (en) * | 2016-05-20 | 2016-10-26 | 中国科学院武汉岩土力学研究所 | Method for preparing lightweight materials from municipal dewatered sludge through water glass and microwave dual curing |
| CN106045242B (en) * | 2016-05-20 | 2019-03-19 | 中国科学院武汉岩土力学研究所 | The method that municipal dewatered sludge waterglass microwave dual cure prepares light material |
| CN106077039A (en) * | 2016-06-29 | 2016-11-09 | 程秀 | The processing method of municipal refuse |
| WO2021018246A1 (en) * | 2019-08-01 | 2021-02-04 | 安能聚绿能股份有限公司 | Method for rapidly manufacturing organic fertilizer |
| CN114733527A (en) * | 2022-04-08 | 2022-07-12 | 同济大学 | Preparation method of Ca-Ni ash-based catalyst and hydrogen-rich synthesis gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101700954A (en) | Sludge pre-treatment method for preparing fuel gas | |
| CN103396815B (en) | Method for preparing carbon materials by use of sludge | |
| CN106430887B (en) | A kind of method of high solid content anaerobic sludge digestion methane phase | |
| CN104150743B (en) | The method of sludge carbon is prepared in the carbonization of a kind of microwave-assisted hydro-thermal | |
| CN100999677B (en) | Process of preparing rich furol biological oil by biomass microwave catalytic pyrolysis | |
| CN103172245B (en) | Method for quick pyrolysis treatment and in situ conversion product utilization of sludge | |
| CN112159063A (en) | Sludge pyrolysis safe resource utilization process | |
| CN108558162A (en) | A kind of method of excess sludge hydrothermal carbonization liquid recycling | |
| CN105567327B (en) | A kind of method that high humidity sludge gasification based on blast furnace slag waste heat recovery produces hydrogen-rich combustion gas | |
| CN103508648B (en) | Sludge substance deep dehydrating method based on thermal conditioning coupling filter pressing | |
| CN107324331A (en) | A kind of method that utilization agricultural shell discarded object prepares activated carbon from activated sludge | |
| CN106753462A (en) | One kind classification directional thermal decomposition sludge carbonization method | |
| CN105688814A (en) | Method for preparing phosphorus-removing adsorbent by utilizing sludge of sewage treatment plant | |
| CN109179927A (en) | A kind of method of the circulating processing of excess sludge | |
| CN111848113A (en) | Method and device for realizing efficient reduction and recycling of dewatered sludge by hydrothermal system | |
| CN104629779A (en) | Process for producing synthetic gas from urban garbage by virtue of combination of pyrolysis and plasma | |
| CN102190298A (en) | Method for preparing active carbon from carbon byproduct in fast pyrolysis of forest remainder | |
| CN108675587B (en) | Method for deep dehydration of sludge through hydrothermal catalytic oxidation | |
| CN103896472B (en) | A kind of mud microwave cracking method of resource | |
| CN102503801A (en) | Method for producing formic acid from glycerol by hydrothermal oxidation | |
| CN102923649A (en) | Reduction hydrogen production compound furnace and device and method for ammonium paratungstate tungsten production by using same | |
| CN203269615U (en) | Coking wastewater catalysis pretreatment equipment | |
| CN212610313U (en) | Device for realizing efficient reduction and recycling of dewatered sludge by hydrothermal system | |
| CN102441556A (en) | Biomass garbage hydrolysis carbon supply recycling method | |
| CN203890206U (en) | Sludge microwave cracking resourcing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100505 |