CN107010808B - Method for treating domestic sludge - Google Patents
Method for treating domestic sludge Download PDFInfo
- Publication number
- CN107010808B CN107010808B CN201710311579.7A CN201710311579A CN107010808B CN 107010808 B CN107010808 B CN 107010808B CN 201710311579 A CN201710311579 A CN 201710311579A CN 107010808 B CN107010808 B CN 107010808B
- Authority
- CN
- China
- Prior art keywords
- domestic sludge
- mixture
- temperature
- treating
- carbonization
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/004—Sludge detoxification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method for treating domestic sludge, which is characterized in that after the domestic sludge is deeply dehydrated, the domestic sludge is mixed with auxiliary materials and then is subjected to high-temperature dry distillation carbonization and high-temperature glazing to prepare a ceramsite product for sale. The ceramsite product can be used for preparing building material concrete, realizes harmless treatment and resource utilization of domestic sludge, and changes waste into valuable.
Description
Technical Field
The invention relates to a method for treating domestic sludge.
Background
With the rapid development of socioeconomic, the amount of domestic sludge is increasing year by year. The existing methods for treating domestic sludge generally comprise sludge landfill technology, sludge composting technology and sludge incineration technology. The dehydration rate of the three technologies to the sludge only reaches about 60 percent, the sludge incineration technology can cause secondary pollution, and an impermeable layer adopted in the sludge landfill technology is cement, so that the underground water pollution can be caused after the cement is broken.
Meanwhile, the three technologies can discharge toxic gas and waste residues, the resource utilization and the heavy metal recovery are almost zero, and basically no additional economic benefit can be generated, namely harmless and resource treatment of the domestic sludge can not be realized.
Disclosure of Invention
The invention aims to provide a method for treating domestic sludge, which realizes harmless and resourceful treatment of the domestic sludge.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for treating domestic sludge comprising the steps of:
(1) stirring and dehydrating: uniformly mixing and stirring domestic sludge and a dehydrating agent, and dehydrating the domestic sludge by breaking microbial cell walls in the domestic sludge through the dehydrating agent;
(2) extrusion and filtration: squeezing and filtering the dewatered domestic sludge into a solid state;
(3) high-frequency microwave detoxification: sterilizing the solid domestic sludge by microwaves, and guiding out and collecting and treating generated toxic gases;
(4) mixing materials for coagulation: adding auxiliary materials into the sterilized domestic sludge to form a mixture;
(5) high-temperature dry distillation and carbonization: performing high-temperature dry distillation carbonization on the mixture, weaving into a carbon molecular net, and solidifying heavy metal particles in the domestic sludge in the carbon molecular net to form a carbonized mixture;
(6) high-temperature glazing: and glazing the carbonized mixture at high temperature, and wrapping the carbonized mixture by a glaze layer to form the ceramsite.
Preferably, the solid domestic sludge is crushed into powder before the step (3).
Preferably, after said step (4), said mixture is extruded into pellets.
Preferably, after the step (6), concrete is prepared by taking the ceramsite as an aggregate.
Preferably, in the step (3), the solid domestic sludge is sterilized by sequentially passing through infrared rays, microwaves and ultraviolet rays.
Preferably, in the step (5), the mixture is subjected to high-temperature dry distillation carbonization by a carbonization kiln, wherein the temperature in the carbonization kiln is gradually increased along the feeding direction of the mixture, and the temperature in the carbonization kiln is between 300 and 600 ℃.
Preferably, in the step (6), the carbonized mixture is subjected to high-temperature glaze coating by a glaze kiln, and the temperature in the glaze kiln is between 1100 ℃ and 1300 ℃.
Preferably, in the step (3), the toxic gas is collected after passing through the ash settling chamber.
Preferably, in the step (4), the auxiliary materials include silicon dioxide, aluminum oxide and ferric oxide.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention relates to a method for treating domestic sludge, which prepares a ceramsite product for sale by deeply dehydrating the domestic sludge, mixing the domestic sludge with auxiliary materials, and then performing high-temperature dry distillation carbonization and high-temperature glazing. The ceramsite product can be used for preparing building material concrete, realizes harmless treatment and resource utilization of domestic sludge, and changes waste into valuable.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
A method for treating domestic sludge comprising the steps of:
(1) stirring and dehydrating: putting the domestic sludge and the dehydrating agent into a stirring tank, uniformly mixing and stirring, and breaking microbial cell walls in the domestic sludge through the dehydrating agent to deeply dehydrate the domestic sludge;
(2) extrusion and filtration: introducing the dehydrated domestic sludge and water into a filter press together, and extruding and filtering the domestic sludge into a solid state by setting pressure parameters in the filter press; in the embodiment, the filter press reduces two thirds of domestic sludge, thereby achieving the purposes of deep dehydration and sludge drying; the water content of the dewatered domestic sludge is reduced to below 45%, and the domestic sludge is detoxified. The sterilization rate reaches more than 70 percent; pressing the domestic sludge into filter cakes through a filter press;
(3) crushing the domestic sludge into powder and/or small blocks by a filter cake crusher;
(4) high-frequency microwave detoxification: sterilizing the crushed domestic sludge by microwave, and guiding out and collecting the generated toxic gas; sterilizing the crushed domestic sludge sequentially by infrared rays, microwaves and ultraviolet rays; the principle of the step is that according to the disinfection and sterilization characteristics of infrared rays, microwaves and ultraviolet rays, a high-frequency microwave frequency conversion technology is adopted to break chain type decomposition is carried out on organic molecules of the domestic sludge, long molecular chains are changed into short molecular chains, so that the structure and chemical properties of the organic molecules are changed, toxic gas is separated, the disinfection and sterilization purpose is achieved, and the disinfection and sterilization effect is more than 90%;
(5) and (3) toxic gas treatment: carrying out dust sedimentation on the toxic gas through a dust sedimentation chamber, and then sending the toxic gas into recovery treatment equipment for treatment; the recycling treatment equipment comprises an acid-alkali liquor washing tower, and the treatment method comprises the technologies of plasma, activated carbon, photocatalyst and the like;
(6) mixing materials for coagulation: adding auxiliary materials into the disinfected and sterilized domestic sludge to form a mixture; in this embodiment, the auxiliary materials include silicon dioxide, aluminum oxide, and ferric oxide;
(7) extruding the mixture into granules according to the required specification and size;
(8) high-temperature dry distillation and carbonization: performing high-temperature dry distillation carbonization on the mixture, puffing the granular mixture, weaving into a carbon molecular net, and solidifying heavy metal granules in the domestic sludge in the carbon molecular net to form a carbonized mixture; the solidified heavy metal particles can not escape to cause pollution; in the embodiment, the granular mixture is subjected to high-temperature dry distillation carbonization by a carbonization kiln, the temperature in the carbonization kiln is gradually increased along the feeding direction of the granular mixture, the temperature at the feeding end of the carbonization kiln is 300 ℃, and the temperature at the discharging end of the carbonization kiln is 600 ℃;
(9) high-temperature glazing: glazing the carbonized mixture at high temperature, and wrapping the carbonized mixture by a glaze layer to form ceramsite; the glaze layer wraps the carbonized mixture, so that organic pollution is completely removed, heavy metal particles cannot escape, and the aim of permanently curing the heavy metal particles is fulfilled; in this example, the carbonized mixture is subjected to high temperature glaze coating by a glaze kiln at a temperature between 1100 ℃ and 1300 ℃; by glazing the carbonized mixture with high-temperature colored glaze, the hardness of the carbonized particles is enhanced, and the carbon molecular network is protected; the water absorption is reduced, and the heat insulation performance is improved; when the ceramic particles are output from the glazing kiln, the temperature of the ceramic particles is about 800 ℃; the hardness of the ceramsite is increased by adding the silicon dioxide in the step (6); by adding the aluminum oxide and the ferric oxide in the step (6), the corrosion resistance of the ceramsite is improved;
(10) preparing light aggregate concrete by taking the ceramsite as aggregate, wherein the used water can adopt the sewage obtained in the step (2), so that zero discharge of wastewater is realized; utilizing the building blocks of the concrete foaming technology and a forming machine to prepare light concrete building blocks and self-insulation concrete composite building blocks; realizes the harmless treatment and resource utilization of the domestic sludge, and changes waste into valuable.
The bulk density of the ceramsite prepared by the method in the embodiment is 730 kg/m; the cylinder pressure strength is 6.0 Mpa; the water absorption per hour is only 5%; the softening coefficient is 0.9; the grain pattern coefficient was 1.6.
The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (7)
1. A method for treating domestic sludge, characterized by: the method comprises the following steps:
(1) stirring and dehydrating: uniformly mixing and stirring domestic sludge and a dehydrating agent, and dehydrating the domestic sludge by breaking microbial cell walls in the domestic sludge through the dehydrating agent;
(2) extrusion and filtration: squeezing and filtering the dewatered domestic sludge into a solid state;
(3) high-frequency microwave detoxification: sterilizing the solid domestic sludge by microwaves, and guiding out and collecting and treating generated toxic gases;
(4) mixing materials for coagulation: adding auxiliary materials into the sterilized domestic sludge to form a mixture;
(5) high-temperature dry distillation and carbonization: performing high-temperature dry distillation carbonization on the mixture, weaving into a carbon molecular net, and solidifying heavy metal particles in the domestic sludge in the carbon molecular net to form a carbonized mixture;
(6) high-temperature glazing: glazing the carbonized mixture at high temperature, and wrapping the carbonized mixture by a glaze layer to form ceramsite;
in the step (5), the mixture is subjected to high-temperature dry distillation carbonization through a carbonization kiln, wherein the temperature in the carbonization kiln is gradually increased along the feeding direction of the mixture, and the temperature in the carbonization kiln is between 300 and 600 ℃;
in the step (4), the auxiliary materials consist of silicon dioxide, aluminum oxide and ferric oxide.
2. A method for treating domestic sludge according to claim 1, characterized in that: before the step (3), crushing the solid domestic sludge into powder.
3. A method for treating domestic sludge according to claim 1, characterized in that: after said step (4), extruding said mixture into pellets.
4. A method for treating domestic sludge according to claim 1, characterized in that: and (4) after the step (6), preparing concrete by taking the ceramsite as aggregate.
5. A method for treating domestic sludge according to claim 1, characterized in that: and (3) sterilizing the solid domestic sludge sequentially by infrared rays, microwaves and ultraviolet rays.
6. A method for treating domestic sludge according to claim 1, characterized in that: in the step (6), the carbonized mixture is subjected to high-temperature colored glaze coating through a glaze coating kiln, wherein the temperature in the glaze coating kiln is between 1100 ℃ and 1300 ℃.
7. A method for treating domestic sludge according to claim 1, characterized in that: in the step (3), the toxic gas is collected after passing through the ash settling chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710311579.7A CN107010808B (en) | 2017-05-05 | 2017-05-05 | Method for treating domestic sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710311579.7A CN107010808B (en) | 2017-05-05 | 2017-05-05 | Method for treating domestic sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107010808A CN107010808A (en) | 2017-08-04 |
| CN107010808B true CN107010808B (en) | 2020-08-04 |
Family
ID=59449414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710311579.7A Active CN107010808B (en) | 2017-05-05 | 2017-05-05 | Method for treating domestic sludge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107010808B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485232A (en) * | 2018-12-12 | 2019-03-19 | 河南力诚环保科技有限公司 | A kind of medicament for deeply dehydrating sludge, method and device |
| CN114835470A (en) * | 2022-04-08 | 2022-08-02 | 广州市净水有限公司 | Method for preparing ceramic artware by utilizing dried sludge |
| CN115707674A (en) * | 2022-11-02 | 2023-02-21 | 中建能源管理(辽宁)有限公司 | Method for treating domestic sludge by fermenting ultrahigh-temperature aerobic microorganisms |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792247A (en) * | 2010-03-19 | 2010-08-04 | 杭州新源环境工程有限公司 | Sludge treatment method capable of combining powerful dehydration with low-temperature mummification |
| CN102491731A (en) * | 2011-12-08 | 2012-06-13 | 复旦大学 | Preparation method of biological ceramsite |
| CN102875003A (en) * | 2012-11-05 | 2013-01-16 | 天津城市建设学院 | Integrated technology of thermal decomposing, dry distilling and gasifying sludge and preparing of ceramsite |
-
2017
- 2017-05-05 CN CN201710311579.7A patent/CN107010808B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792247A (en) * | 2010-03-19 | 2010-08-04 | 杭州新源环境工程有限公司 | Sludge treatment method capable of combining powerful dehydration with low-temperature mummification |
| CN102491731A (en) * | 2011-12-08 | 2012-06-13 | 复旦大学 | Preparation method of biological ceramsite |
| CN102875003A (en) * | 2012-11-05 | 2013-01-16 | 天津城市建设学院 | Integrated technology of thermal decomposing, dry distilling and gasifying sludge and preparing of ceramsite |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107010808A (en) | 2017-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7108244B2 (en) | How To Remove Toxins From Fly Ash | |
| CN107010808B (en) | Method for treating domestic sludge | |
| CN103241970B (en) | Sintering expansion type light ceramsite produced by using oily sludge and manufacture method of sintering expansion type light ceramsite | |
| CN106927662B (en) | Method for treating domestic sludge and hazardous waste sludge | |
| CN105906176B (en) | A method of recycling, which is total to, using greasy filth and solid waste prepares light ceramic | |
| CA2733685C (en) | Method and apparatus for treating waste materials | |
| CN106424077B (en) | Method for treating fly ash by using sludge | |
| CN107032683A (en) | A kind of energy-saving environment protection brick and preparation method | |
| CN104003593B (en) | Sludge harmless treatment method | |
| CN101643331A (en) | Method for preparing gypsum powder by microwave activation | |
| CN101100344A (en) | Treatment method for heating and drying sludge by microwave and low-temperature smoke gas | |
| CN113651588B (en) | Efficient phosphorus-removing baking-free ceramsite and preparation method and application thereof | |
| JP2001322808A (en) | Manufacturing method of activated carbon from sludge | |
| CN105967752A (en) | Preparation method of sheet materials with low pollution by using city sludge and calcium carbide slags | |
| JP3577223B2 (en) | Activated carbon production method using sludge | |
| CN103011544A (en) | Method for deeply dehydrating sludge by utilizing cullet | |
| JP5319254B2 (en) | Method for firing sludge granulated product and method of using the same | |
| CN110615587A (en) | Sludge recycling treatment process and system | |
| KR100687627B1 (en) | Method for solidifying sewage sludge | |
| CN213771780U (en) | Municipal sludge treatment system | |
| CN107337834B (en) | Waste incineration fly ash filling master batch and preparation method and application thereof | |
| CN218811268U (en) | Device for separating sludge and utilizing sludge at high value | |
| CN113511694B (en) | Composite sponge material, preparation method thereof and application of composite sponge material in treatment of high-salinity and high-calorific-value wastewater | |
| CN107010859B (en) | A method of for handling hazardous waste sludge | |
| CN107352890A (en) | A kind of low energy consumption waterworks sludge miniaturation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170829 Address after: East Lake Garden yangshe Jiangsu province 215600 Suzhou Zhangjiagang city 13 Building 601 Applicant after: Li Suqing Applicant after: Li Wendong Address before: 215699, No. 10, Tang Qiao Road, Zhangjiagang Economic Development Zone (South District, Suzhou, Jiangsu) Applicant before: ZHANGJIAGANG RUISAIKE ECOLOGICAL TECHNOLOGY CO.,LTD. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20170804 Assignee: Guangdong Jiayuan Environmental Protection Group Co.,Ltd. Assignor: Li Suqing|Li Wendong Contract record no.: X2021980010496 Denomination of invention: A method for treating domestic sludge Granted publication date: 20200804 License type: Exclusive License Record date: 20211009 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Guangdong Jiayuan Environmental Protection Group Co.,Ltd. Assignor: Li Suqing|Li Wendong Contract record no.: X2021980010496 Date of cancellation: 20221031 |
|
| EC01 | Cancellation of recordation of patent licensing contract |