CN109553347B - Environment-friendly partition board containing sewage treatment waste sludge and preparation method thereof - Google Patents
Environment-friendly partition board containing sewage treatment waste sludge and preparation method thereof Download PDFInfo
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- CN109553347B CN109553347B CN201811514664.4A CN201811514664A CN109553347B CN 109553347 B CN109553347 B CN 109553347B CN 201811514664 A CN201811514664 A CN 201811514664A CN 109553347 B CN109553347 B CN 109553347B
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- waste sludge
- foaming
- sewage treatment
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- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B18/04—Waste materials; Refuse
- C04B18/0418—Wet materials, e.g. slurries
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Treatment Of Sludge (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a preparation method of an environment-friendly partition board containing sewage treatment waste sludge, which comprises the following steps: 1) dehydrating, cracking at low temperature, drying and chemically treating the waste sludge to obtain usable sludge materials; 2) mixing 100-400 parts of water, 1-10 parts of mixed fibers and 100-500 parts of available sludge materials, adding 1-10 parts of cement reinforced foaming additives, and adding 500-800 parts of Portland cement with the strength of 32.5 or 42.5 to obtain a mixture; 3) foaming the mixture obtained in the step 2) to obtain foamed cement slurry; 4) injecting the foamed cement slurry obtained in the step 3) into a mould to obtain a finished product. According to the invention, the waste sludge generated by sewage treatment is specially treated, and the preparation process is improved, so that the waste sludge meets the quality requirement of GBT23451-2009, the VOC tends to zero, the environment friendliness is excellent, and the recycling rate of the waste sludge is greatly improved.
Description
Technical Field
The invention relates to the field of building materials, in particular to an environment-friendly wallboard.
Background
Partition boards, especially prefabricated partition boards, have a wide application market in construction, and among them, lightweight partition boards, which are one of the prefabricated partition boards, are very popular among consumers because of their various advantages of lightweight, sound insulation, heat insulation, and fast installation speed. In addition, the method for treating sludge generated after the treatment of domestic sewage or industrial sewage on the market generally adopts a landfill mode, and although the method is also used for producing building materials such as square bricks and the like, the product can contact rainwater, heavy metals in the sludge raw materials in the product can permeate into underground water along with the rainwater, so that secondary pollution is caused, and therefore, the mode of using the sludge as one of the raw materials of the building materials such as the square bricks and the like is still not ideal, and the wide application of the sludge in the field of building materials is also restricted.
Disclosure of Invention
The invention aims to provide a preparation method of an environment-friendly partition board containing waste sludge for sewage treatment aiming at the existing defects.
The technical scheme adopted by the invention is as follows: a preparation method of an environment-friendly partition board containing sewage treatment waste sludge comprises the following process steps:
1) waste sludge generated by sewage treatment is subjected to dehydration, low-temperature cracking, drying and chemical treatment to obtain usable sludge materials;
2) mixing 100-400 parts of water, 1-10 parts of mixed fibers and 100-500 parts of available sludge materials in parts by weight, fully stirring, adding 1-10 parts of cement reinforced foaming additives, uniformly mixing and stirring, adding 500-800 parts of Portland cement with the strength of 32.5 or 42.5, uniformly mixing and stirring to obtain a mixture;
3) taking 1-15 parts of foaming liquid, carrying out foaming treatment by a foaming machine to form foam, placing the foam and the mixture obtained in the step 2) in a foaming mixer for physical foaming treatment, wherein the foaming time is 1-10 min, and obtaining foamed cement slurry;
4) injecting the foamed cement slurry obtained in the step 3) into a mould, curing, removing the mould, maintaining, cutting and obtaining a finished product.
Specifically, the low-temperature cracking in the step 1) of the invention can remove most of carbon-containing harmful components and heat values in the waste sludge, greatly reduce VOC of the waste sludge, and effectively improve the environmental protection property of the waste sludge.
As a further improvement of the scheme, the portland cement in the step 2) is ordinary portland cement or composite portland cement.
As a further improvement of the scheme, the mixed fiber in the step 2) comprises 0.5-5 parts by weight of 10-30 mm anti-cracking glass fiber and 1-10 parts by weight of 5-15 mm dispersive anti-shrinkage PP fiber.
As a further improvement of the scheme, the cement-enhanced foaming admixture in the step 2) comprises 1-4 parts of dispersible latex powder, 1-5 parts of 1-20 ten thousand viscosity cellulose, 1-10 parts of high-efficiency water reducing agent and 1-10 parts of VAE emulsion in parts by weight. Specifically, the cellulose is selected from at least one of hydroxyethyl mixed cellulose, methyl cellulose and ethyl cellulose, and the high-efficiency water reducing agent is selected from a lignin water reducing agent, a naphthalene water reducing agent or an anthracene water reducing agent.
As a further improvement of the scheme, in the step 1), the dehydration is to reduce the water content to 70% by using a centrifugal dehydrator and then reduce the water content to below 30% by using a heat pump type drying device.
As a further improvement of the scheme, the drying in the step 1) is drying treatment for 10-30 min at the temperature of 300-600 ℃. In particular, the physical high temperature treatment can further reduce VOCs and other volatile harmful components in the waste sludge.
As a further improvement of the scheme, the chemical treatment in the step 1) is spraying treatment on the waste sludge by using a mixed solution containing EDTA, polyethylene glycol and sodium cellulose. Specifically, the chemical treatment can further solidify harmful components such as heavy metals and VOCs in the waste sludge.
As a further improvement of the scheme, the stirring time of the stirring in the step 2) is 1-10 min.
As a further improvement of the scheme, the density of the foamed cement slurry in the step 3) is 300-1000 kg/m3The water-cement ratio is (30-50): 100. in particular, the appropriate density and water-cement ratio are beneficial to improving the comprehensive performance of the partition board after post-curing forming.
The invention also aims to provide the environment-friendly partition board containing the sewage treatment waste sludge prepared by the preparation method.
The invention has the beneficial effects that: the waste sludge generated by sewage treatment is suitable to be used as one of the raw materials of the partition board through special treatment, and the partition board prepared by perfecting the preparation process of the partition board not only meets the quality requirement of GBT23451-2009, but also has zero VOC (volatile organic compounds), excellent environmental protection property and greatly improved recycling rate of the waste sludge.
Detailed Description
The present invention is specifically described below with reference to examples in order to facilitate understanding of the present invention by those skilled in the art. It should be particularly noted that the examples are given solely for the purpose of illustration and are not to be construed as limitations on the scope of the invention, as non-essential improvements and modifications to the invention may occur to those skilled in the art, which fall within the scope of the invention as defined by the appended claims. Meanwhile, the raw materials mentioned below are not specified in detail and are all commercial products; the process steps or preparation methods not mentioned in detail are all process steps or preparation methods known to the person skilled in the art.
Example 1
A preparation method of an environment-friendly partition board containing sewage treatment waste sludge comprises the following process steps:
1) firstly, reducing the water content of waste sludge generated by sewage treatment to 70% by using a centrifugal dehydrator, reducing the water content to below 30% by using a heat pump type device, then carrying out low-temperature pyrolysis, drying at the temperature of 300 ℃ for 30min, and then carrying out spray treatment on the waste sludge by using a mixed solution containing EDTA, polyethylene glycol and sodium cellulose to obtain a usable sludge material;
2) mixing 350 parts of water, 2 parts of mixed fibers and 250 parts of available sludge materials in parts by weight, fully stirring for 1min, adding 2 parts of cement-reinforced foaming additive, uniformly mixing and stirring for 10min, adding 700 parts of ordinary Portland cement with the strength of 42.5, uniformly mixing and stirring for 1min to obtain a mixture;
3) taking 1 part of foaming liquid, carrying out foaming treatment by a foaming machine to form foam, placing the foam and the mixture obtained in the step 2) into a foaming stirrer for physical foaming treatment, wherein the foaming time is 10min, and the density is 500kg/m3The water-cement ratio is 50: 100 of foamed cement slurry;
4) and (3) injecting the foamed cement slurry obtained in the step 3) into a mold, curing, demolding, maintaining for 28 days, and cutting to obtain a finished product of the embodiment 1.
The blended fiber comprises, by weight, 0.5 part of 10-30 mm anti-cracking glass fiber and 10 parts of 5-15 mm dispersible anti-shrinkage PP fiber; the cement reinforced foaming admixture consists of 1 part of dispersible latex powder, 5 parts of 1-20 ten thousand viscosity cellulose, 1 part of high efficiency water reducing agent and 10 parts of VAE emulsion in parts by weight.
The finished product of example 1 was tested for relevant properties, which met the quality requirements of GBT23451-2009 and measured VOC towards zero.
Example 2
A preparation method of an environment-friendly partition board containing sewage treatment waste sludge comprises the following process steps:
1) firstly, reducing the water content of waste sludge generated by sewage treatment to 70% by using a centrifugal dehydrator, reducing the water content to below 30% by using a heat pump type device, then carrying out low-temperature pyrolysis, drying at the temperature of 600 ℃ for 10min, and then carrying out spray treatment on the waste sludge by using a mixed solution containing EDTA, polyethylene glycol and sodium cellulose to obtain a usable sludge material;
2) mixing 100 parts of water, 5 parts of mixed fibers and 300 parts of available sludge materials in parts by weight, fully stirring for 1min, adding 5 parts of cement reinforced foaming additive, uniformly mixing and stirring for 10min, adding 800 parts of composite portland cement with the strength of 42.5, uniformly mixing and stirring for 1min to obtain a mixture;
3) taking 15 parts of foaming liquid, carrying out foaming treatment by a foaming machine to form foam, placing the foam and the mixture obtained in the step 2) into a foaming stirrer for physical foaming treatment, wherein the foaming time is 10min, and the density is 300kg/m3The water-cement ratio is 30: 100 of foamed cement slurry;
4) and (3) injecting the foamed cement slurry obtained in the step 3) into a mold, curing, demolding, maintaining for 28 days, and cutting to obtain a finished product of the embodiment 2.
The blended fiber comprises, by weight, 5 parts of 10-30 mm anti-cracking glass fiber and 1 part of 5-15 mm dispersible anti-shrinkage PP fiber; the cement reinforced foaming admixture consists of 4 parts by weight of dispersible latex powder, 1 part by weight of 1-20 ten thousand viscosity cellulose, 10 parts by weight of high efficiency water reducing agent and 1 part by weight of VAE emulsion.
The finished product of example 2 was tested for relevant properties, which met the quality requirements of GBT23451-2009 and measured VOC towards zero.
Example 3
A preparation method of an environment-friendly partition board containing sewage treatment waste sludge comprises the following process steps:
1) firstly, reducing the water content of waste sludge generated by sewage treatment to 70% by using a centrifugal dehydrator, reducing the water content to below 30% by using a heat pump type device, then carrying out low-temperature pyrolysis, drying at the temperature of 450 ℃ for 20min, and then carrying out spray treatment on the waste sludge by using a mixed solution containing EDTA, polyethylene glycol and sodium cellulose to obtain a usable sludge material;
2) mixing 400 parts of water, 10 parts of mixed fibers and 500 parts of available sludge materials in parts by weight, fully stirring for 1min, adding 10 parts of cement-reinforced foaming additive, uniformly mixing and stirring for 10min, adding 500 parts of ordinary Portland cement with the strength of 32.5, uniformly mixing and stirring for 1min to obtain a mixture;
3) taking 10 parts of foaming liquid, carrying out foaming treatment by a foaming machine to form foam, placing the foam and the mixture obtained in the step 2) into a foaming stirrer for physical foaming treatment, wherein the foaming time is 5min, and the density is 1000kg/m3The water-cement ratio is 40: 100 of foamed cement slurry;
4) injecting the foamed cement slurry obtained in the step 3) into a mold, curing, demolding, maintaining for 28 days, and cutting to obtain a finished product of the embodiment 3.
The blended fiber comprises, by weight, 3 parts of 10-30 mm anti-cracking glass fiber and 5 parts of 5-15 mm dispersible anti-shrinkage PP fiber; the cement reinforced foaming admixture consists of 2 parts by weight of dispersible latex powder, 3 parts by weight of 1-20 ten thousand viscosity cellulose, 5 parts by weight of high efficiency water reducing agent and 5 parts by weight of VAE emulsion.
The finished product of example 3 was tested for relevant properties, which met the quality requirements of GBT23451-2009 and measured VOC towards zero.
The above embodiments are preferred embodiments of the present invention, and all similar processes and equivalent variations to those of the present invention should fall within the scope of the present invention.
Claims (6)
1. A preparation method of an environment-friendly partition board containing sewage treatment waste sludge is characterized by comprising the following process steps:
1) waste sludge generated by sewage treatment is subjected to dehydration, low-temperature cracking, drying and chemical treatment to obtain usable sludge materials;
2) mixing 100-400 parts of water, 1-10 parts of mixed fibers and 100-500 parts of available sludge materials in parts by weight, fully stirring, adding 1-10 parts of cement reinforced foaming additives, uniformly mixing and stirring, adding 500-800 parts of Portland cement with the strength of 32.5 or 42.5, uniformly mixing and stirring to obtain a mixture;
3) taking 1-15 parts of foaming liquid, carrying out foaming treatment by a foaming machine to form foam, placing the foam and the mixture obtained in the step 2) in a foaming mixer for physical foaming treatment, wherein the foaming time is 1-10 min, and obtaining foamed cement slurry;
4) injecting the foamed cement slurry obtained in the step 3) into a mold, and curing, demolding, maintaining and cutting to obtain a finished product;
the portland cement in the step 2) is ordinary portland cement or composite portland cement;
the mixed fiber in the step 2) comprises 0.5-5 parts by weight of 10-30 mm anti-cracking glass fiber and 1-10 parts by weight of 5-15 mm dispersive anti-shrinkage PP fiber;
the cement reinforced foaming admixture comprises, by weight, 1-4 parts of dispersible latex powder, 1-5 parts of 1-20 ten thousand viscosity cellulose, 1-10 parts of a high efficiency water reducing agent and 1-10 parts of VAE emulsion;
the chemical treatment in the step 1) is to spray the waste sludge by using a mixed solution containing EDTA, polyethylene glycol and sodium cellulose.
2. The method for preparing the environmental-friendly partition board containing the waste sludge of sewage treatment according to claim 1, wherein the method comprises the following steps: and step 1) dewatering, namely, reducing the water content to 70% by using a centrifugal dehydrator, and reducing the water content to below 30% by using heat pump type drying equipment.
3. The method for preparing the environmental-friendly partition board containing the waste sludge of sewage treatment according to claim 1, wherein the method comprises the following steps: the drying in the step 1) is drying treatment for 10-30 min at the temperature of 300-600 ℃.
4. The method for preparing the environmental-friendly partition board containing the waste sludge of sewage treatment according to claim 1, wherein the method comprises the following steps: and 2) stirring for 1-10 min.
5. The method for preparing the environmental-friendly partition board containing the waste sludge of sewage treatment according to claim 1, wherein the method comprises the following steps: the density of the foamed cement slurry in the step 3) is 300-1000 kg/m3The water-cement ratio is (30-50): 100.
6. an environment-friendly partition board containing waste sludge for sewage treatment, which is prepared by the preparation method of any one of claims 1 to 5.
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| CN201811514664.4A CN109553347B (en) | 2018-12-11 | 2018-12-11 | Environment-friendly partition board containing sewage treatment waste sludge and preparation method thereof |
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| CN201811514664.4A CN109553347B (en) | 2018-12-11 | 2018-12-11 | Environment-friendly partition board containing sewage treatment waste sludge and preparation method thereof |
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| CN109553347A CN109553347A (en) | 2019-04-02 |
| CN109553347B true CN109553347B (en) | 2021-06-01 |
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| CN110330272A (en) * | 2019-04-22 | 2019-10-15 | 安徽理工大学 | A kind of solidification regeneration product process of construction slurry |
| CN110655364A (en) * | 2019-10-28 | 2020-01-07 | 长安大学 | Concrete containing sludge pyrolysate and preparation method thereof |
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| WO1994010099A1 (en) * | 1992-10-23 | 1994-05-11 | Johnson William B | Process for treating fly ash and bottom ash and the resulting product |
| CN103420654A (en) * | 2013-01-15 | 2013-12-04 | 北京太空板业股份有限公司 | Material used for manufacturing foam cement, method for preparing foam cement from same, and foam cement |
| CN103802198A (en) * | 2014-03-03 | 2014-05-21 | 谢鸣燕 | Method and device for manufacturing wallboards through sludge |
| CN103979858A (en) * | 2014-04-04 | 2014-08-13 | 马鞍山市恒毅机械制造有限公司 | Anticorrosion lightweight partition plate and manufacturing method thereof |
| CN105601323A (en) * | 2015-12-18 | 2016-05-25 | 湖北大学 | Foam concrete composite lightweight partition batten and preparation method thereof |
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2018
- 2018-12-11 CN CN201811514664.4A patent/CN109553347B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994010099A1 (en) * | 1992-10-23 | 1994-05-11 | Johnson William B | Process for treating fly ash and bottom ash and the resulting product |
| CN103420654A (en) * | 2013-01-15 | 2013-12-04 | 北京太空板业股份有限公司 | Material used for manufacturing foam cement, method for preparing foam cement from same, and foam cement |
| CN103802198A (en) * | 2014-03-03 | 2014-05-21 | 谢鸣燕 | Method and device for manufacturing wallboards through sludge |
| CN103979858A (en) * | 2014-04-04 | 2014-08-13 | 马鞍山市恒毅机械制造有限公司 | Anticorrosion lightweight partition plate and manufacturing method thereof |
| CN105601323A (en) * | 2015-12-18 | 2016-05-25 | 湖北大学 | Foam concrete composite lightweight partition batten and preparation method thereof |
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