CN113816763A - Biomass sludge ceramsite, preparation method and application - Google Patents
Biomass sludge ceramsite, preparation method and application Download PDFInfo
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- CN113816763A CN113816763A CN202111225291.0A CN202111225291A CN113816763A CN 113816763 A CN113816763 A CN 113816763A CN 202111225291 A CN202111225291 A CN 202111225291A CN 113816763 A CN113816763 A CN 113816763A
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/0675—Vegetable refuse; Cellulosic materials, e.g. wood chips, cork, peat, paper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/02—Loose filtering material, e.g. loose fibres
- B01D39/06—Inorganic material, e.g. asbestos fibres, glass beads or fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
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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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
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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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/135—Combustion residues, e.g. fly ash, incineration waste
- C04B33/1352—Fuel ashes, e.g. fly ash
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/0665—Waste material; Refuse other than vegetable refuse
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- 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
Abstract
The invention discloses a biomass sludge ceramsite, a preparation method and an application thereof, wherein the biomass sludge ceramsite comprises the following raw materials in percentage by weight: 31.5-37.5% of biomass raw material, 10-15% of fly ash and 47.5-58.5% of oven-dried sludge, wherein the fly ash is Shell coal gasification fly ash formed by sintering at 1400-1600 ℃. The biomass sludge ceramsite provided by the invention takes the residual sludge of a sewage treatment plant, biomass mixed-burning ash and coal gasification fly ash as raw materials, so that the problems of raw material source and sludge treatment of the existing ceramsite can be effectively solved, and the Shell coal gasification fly ash can be reasonably utilized. Moreover, the biomass sludge ceramsite prepared by the method is used as a filter material for treating industrial wastewater, has high water absorption rate, strong cylinder pressure strength, low breakage rate and loss rate, large porosity and specific surface area, can achieve a good adsorption effect, is pressure-resistant and is not easy to break, and is suitable for treating industrial wastewater.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to biomass sludge ceramsite, a preparation method and application thereof.
Background
With the rapid development of urbanization and industrialization, the population is continuously increased, and the total output of municipal sludge is also increased sharply. Sludge generated in municipal sewage treatment is mainly solid waste which is an extremely complex heterogeneous body composed of organic residues, inorganic particles, bacterial cells, colloids and the like.
At present, the main modes of sludge treatment at home and abroad comprise methods of landfill, incineration, throwing into the sea, land utilization and the like. Although these methods can accommodate large amounts of sludge and are an effective way to dispose of the sludge, there are problems. Because the sludge contains a large amount of organic matters and a large amount of substances such as nitrogen, phosphorus and the like, if the sludge is discharged into water, the content of oxygen in the water body is inevitably reduced, and the water quality is deteriorated. Besides, the sludge also contains various toxic substances, heavy metals, pathogenic bacteria, parasitic ova and other harmful substances. Therefore, the sludge is properly treated so as to realize the aims of reduction, stabilization, harmlessness and reclamation. Therefore, the reasonable treatment and disposal of the sludge have great significance for sustainable development.
The Shell coal gasification fly ash is formed by sintering at a high temperature of 1400-1600 ℃, and compared with fly ash generated by a common coal-fired power plant at a temperature of about 1000 ℃, the sintering degree of the Shell coal gasification fly ash is higher, which directly causes that the Shell coal gasification fly ash is difficult to be recycled. As the coal gasification fly ash of the shell is sintered at high temperature, the sintering degree is higher, and the microscopic form is similar to a vitreous body. Because the coal gasification fly ash is basically an inert substance, the surface activity of the coal gasification fly ash is very low, and a developed pore channel structure is lacked, the Shell coal gasification fly ash is difficult to be directly used as a catalyst carrier. How to properly and reasonably treat the Shell coal gasification fly ash is always an urgent problem to be solved in the coal gasification process.
As a light aggregate for buildings, ceramsite is greatly valued by the characteristics of light weight, heat preservation, environmental protection and the like. At present, the porcelain granules in China mainly take clay porcelain granules as main materials, and most of the sources of the clay raw materials are taken from cultivated land, so that the porcelain granules do not accord with the sustainable development strategy.
In addition, industrial wastewater including production wastewater, production sewage and cooling water refers to wastewater and waste liquid generated in an industrial production process, and contains pollutants which run off along with water, and because the industrial wastewater often contains various toxic substances, the environmental pollution is aggravated, and the pollution is very harmful to human health, the industrial wastewater can be discharged after being treated by adopting corresponding purification measures according to the components and the concentration of the pollutants in the wastewater. At present, the adoption of filter materials to adsorb heavy metals in wastewater becomes an important means for treating industrial wastewater. Therefore, the development of an economical and practical filter material with good adsorption effect is of great significance to the field.
Disclosure of Invention
The invention aims to provide a substance sludge ceramsite, a preparation method and application thereof. Moreover, the invention is used as a filter material to treat industrial wastewater, and can effectively reduce the content of heavy metal in the wastewater.
The technical scheme adopted by the invention is as follows:
the biomass sludge ceramsite comprises the following raw materials in percentage by weight: 31.5-37.5% of biomass raw material, 10-15% of fly ash and 47.5-58.5% of oven-dried sludge, wherein the fly ash is Shell coal gasification fly ash formed by sintering at 1400-1600 ℃.
Preferably, the biomass raw material is more than one of wood chips or rice hulls, and the sludge is secondary sludge generated by a municipal sewage treatment plant.
Preferably, the porosity of the biomass sludge ceramsite is 48.9 to 49.4 percent, and the specific surface area is 18.5 multiplied by 104～18.7×104The water absorption rate is 36.024-37.003%, and the cylinder pressure strength is 5.6-5.7 MPa.
The preparation method of any one of the biomass sludge ceramsite comprises the following steps:
s1: completely drying sludge of an urban sewage treatment plant, fully crushing the sludge into small particles, and sieving the small particles;
s2: completely drying the biomass raw material, grinding the biomass raw material into powder and sieving the powder;
s3: uniformly mixing the sludge particles obtained in the step 1 and the biomass powder obtained in the step 2 in proportion and then sieving;
s4: heating the mixture obtained in the step 3 in a muffle furnace at 700-850 ℃ for 2-3 hours to obtain mixed burning ash;
s5: cooling the mixed burning ash obtained in the step 4 to room temperature, grinding and sieving;
s6: completely drying, grinding and sieving the Shell coal gasification fly ash;
s7: uniformly mixing the mixed burning ash obtained in the step 5, the fly ash obtained in the step 6 and the sludge particles obtained in the step 1 according to a proportion, grinding and sieving;
s8: adding the mixture obtained in the step 7 into a granulator to prepare raw material balls, and drying the raw material balls;
s9: and roasting the dried raw material balls in a muffle furnace at high temperature to obtain the biomass sludge ceramsite.
Preferably, the ratio of the sludge particles to the biomass powder in step 3 is: 50-55: 45-50.
Preferably, the proportion of the mixed burning ash, the fly ash and the sludge particles in the step 7 is as follows: 70% -75%: 10% -15%: 15 to 20 percent.
Preferably, in the step 8, water is used as the adhesive in the granulation process, the rotation speed of the granulator is 30-45 r/min, and the granulation time is 5-10 min.
Preferably, in the step 9, the raw material balls are placed in a muffle furnace at 450-500 ℃ to be preheated for 20-25 min, then the temperature is raised to 1100-1150 ℃ for roasting, and the temperature is kept for 10-15 min after the roasting is finished.
Preferably, the screen mesh used for sieving in the steps 1-7 is 100-140 meshes in diameter.
The use method of any one of the biomass sludge ceramsite is used as an industrial wastewater treatment filter material for adsorbing heavy metals in industrial wastewater.
The invention has the beneficial effects that:
1. the sludge ceramsite is prepared by adopting sludge of a sewage treatment plant as a main raw material, drying the sludge at a high temperature to obtain sludge powder, preparing mixed burning ash by using dried rice hull powder and sawdust powder, mixing the mixed burning ash with coal gasification fly ash and the sludge powder, granulating, drying and roasting at a high temperature, can consume a large amount of sludge, can fix most heavy metal elements in the sludge, can effectively prevent the leaching of the heavy metal elements, and can realize the harmlessness and reduction of the sludge.
2. The sludge powder is supplemented with dry rice hull powder and sawdust powder to prepare the mixed combustion ash, the sludge and the biomass form the composite fuel together, and the composite fuel contains more Si and Al elements, so that the biomass mixed combustion ash has higher volcanic ash activity. The biomass mixed-burning ash has smaller particle size and larger specific surface area, and the reaction activity can be easily excited if the corresponding activity is larger. The biomass mixed-firing ash, the coal gasification fly ash and the dry sludge are mixed and granulated, the sludge is used as a gas former in the firing process of the ceramsite and plays a role in pore forming, and the coal gasification fly ash contains abundant substances with indefinite forms, so that the firing temperature of the ceramsite is reduced. The biomass mixed-burning ash, the fly ash and the dry sludge are mixed, so that a rough and dense porous structure is formed inside the ceramsite, and the adsorption performance of the biomass sludge ceramsite on heavy metal ions in sewage is further enhanced.
3. The Shell coal gasification fly ash is used as a binder, the content of silicon-aluminum elements in the Shell coal gasification fly ash is higher, and the Shell coal gasification fly ash is similar to the components of clay required for firing ceramsite, so that the Shell coal gasification fly ash can completely replace the traditional clay to be used as raw material for sintering ceramsite. The coal gasification fly ash is used as the adhesive to replace the clay required by the traditional firing of the ceramsite, thereby not only realizing the resource utilization of the fly ash, but also saving the cost for manufacturing the ceramsite.
4. In the process of firing the ceramsite, organic matters in the sludge and organic matters remaining in sludge ash are burned to release gas, and a plurality of small air holes are formed on the surface of the ceramsite in the process of escaping the internal gas, so that the specific surface area of the ceramsite can be greatly improved. The partition walls of the pores mainly consist of glass bodies and crystal minerals formed in sintering, and the partition walls of the pores are compact in structure, so that the ceramsite has certain strength and can ensure that the ceramsite has larger specific surface area and water absorption. The biomass sludge ceramsite prepared by the invention has the advantages of high water absorption rate, strong cylinder pressure strength, low crushing rate and damage rate, large porosity and large specific surface area, can achieve better adsorption effect, is pressure-resistant and is not easy to break, is suitable for being used as a water treatment filter material, and realizes resource utilization of sludge.
Detailed Description
The present invention will be described in detail with reference to specific examples.
In the following examples, the sludge used is excess sludge of a lake shore water quality purification station in Nanjing, and the biomass raw materials used are rice husks and wood chips of a farm village around the lake shore water quality purification station in Nanjing; the oven is DHG-9626A model of Shanghai Xin instrument and meter factory; the muffle furnace is KSY-12D-16 model of Wuhan Yawara electric furnace Co, and the granulator is phi 600 model of Henan Da Jia mining machinery Co.
Example 1
1.1 taking the residual sludge of a secondary sedimentation tank of a lakeside water quality purification station of Nanjing city with the water content of 97-99%, completely drying the sludge in an oven, fully crushing the sludge into small particles, and sieving the small particles by a 100-mesh sieve;
1.2 taking rice hulls and sawdust of villages around the lakeside water quality purification station in Nanjing city respectively, completely drying in an oven, fully crushing to small particles, and sieving with a 100-mesh sieve;
1.3 taking the sieved sludge powder, rice hull powder and wood dust powder, and mixing the materials according to the weight ratio of 5: 3: 2, mixing uniformly and then sieving with a 100-mesh sieve;
1.4 putting the sieved mixture into a muffle furnace at 700 ℃ to be heated for 3 hours, cooling to room temperature, and sieving with a 100-mesh sieve to obtain mixed burning ash;
1.5 taking Shell coal gasification fly ash, completely drying and fully crushing the Shell coal gasification fly ash into small particles, and then sieving the small particles with a 100-mesh sieve;
1.6 taking the sieved mixed burning ash, the Shell coal gasification fly ash and the sludge obtained in the step 1.1, mixing the materials according to the proportion of 75:11:14, uniformly mixing the materials and then sieving the materials with a 100-mesh sieve;
1.7 adding 2 kg of sieved powder into a granulator, using water as a bonding agent, controlling the rotating speed of the granulator to be 30r/min, controlling the granulation time to be 10min, and finishing the manufacturing of raw material balls when certain viscosity can be sensed by touching with fingers;
1.8 placing the raw material balls obtained in the step 1.7 in an oven at 100 ℃ for drying for 10 min;
1.9 placing the dried raw material balls in a muffle furnace at 500 ℃ for preheating for 20min, then directly heating to 1100 ℃ for roasting and preserving heat for 15min to obtain biomass sludge ceramsite; the obtained biomass sludge ceramsite consists of 22.5 percent of rice hull, 15 percent of wood dust, 11 percent of fly ash and 51.5 percent of oven-dried sludge.
1.10 cooling the fired biomass sludge ceramsite to room temperature.
And (3) ceramsite performance identification: the sludge ceramsite prepared in the example 1 has the water absorption of 36.024%, the cylinder pressure strength of 5.7Mpa, the porosity of 48.9% and the specific surface area of 18.5 multiplied by 10 by detecting by adopting the method of the industrial standard of CJ/T299-plus 2008 for water treatment4。
Example 2
2.1 taking the residual sludge of the secondary sedimentation tank of the lakeside water quality purification station of Nanjing city with the water content of 97-99%, completely drying the sludge in an oven, fully crushing the sludge into small particles, and sieving the particles by a 120-mesh sieve;
2.2 completely drying rice hulls and wood chips of the farm crops around the lake shore water quality purification station of Nanjing city in an oven, fully crushing the rice hulls and the wood chips into small particles, and sieving the small particles with a 120-mesh sieve;
2.3 taking the sieved sludge powder, rice hull powder and wood dust powder, and mixing the materials according to the weight ratio of 55: 35: 10, and uniformly mixing and then sieving with a 120-mesh sieve;
2.4 putting the sieved mixture into a muffle furnace at 800 ℃ to be heated for 2.5 hours, cooling to room temperature, and sieving with a 120-mesh sieve to obtain mixed burning ash;
2.5 taking the Shell coal gasification fly ash, completely drying and fully crushing the Shell coal gasification fly ash into small particles, and then sieving the small particles with a 120-mesh sieve;
2.6 taking the sieved mixed burning ash, the Shell coal gasification fly ash and the sludge obtained in the step 2.1, mixing the materials according to the proportion of 70:18:12, uniformly mixing the materials, and sieving the mixture by using a 120-mesh sieve;
2.7, using water as a bonding agent, controlling the rotating speed of the granulator to be 35r/min and the granulating time to be 10min, and finishing the manufacturing of the raw material balls when certain viscosity can be sensed by touching with fingers;
2.8 placing the raw material balls obtained in the step 2.7 in an oven at 110 ℃ for drying for 8 min;
2.9 placing the dried raw material balls in a muffle furnace at 450 ℃ for preheating for 25min, then directly heating to 1150 ℃ for roasting and preserving heat for 10min to obtain the biomass sludge ceramsite. The obtained biomass sludge ceramsite consists of 24.5 percent of rice hull, 7 percent of wood dust, 18 percent of fly ash and 50.5 percent of oven-dried sludge.
2.10 cooling the fired biomass sludge ceramsite to room temperature.
And (3) ceramsite performance identification: the sludge ceramsite prepared in the example 2 has the water absorption of 36.745 percent, the cylinder pressure strength of 5.6Mpa, the porosity of 49.2 percent and the specific surface area of 18.7 multiplied by 10 percent, which are detected by a method of the industrial standard CJ/T299-plus 2008 for water treatment4。
Example 3
3.1 taking the residual sludge of the secondary sedimentation tank of the lakeside water quality purification station of Nanjing city with the water content of 97-99 percent, completely drying the sludge in an oven, fully crushing the sludge into small particles, and sieving the small particles by a 140-mesh sieve;
3.2 taking rice hulls of villages around the lakeside water quality purification station in Nanjing city, completely drying the rice hulls in an oven, fully crushing the rice hulls into small particles, and sieving the small particles with a 140-mesh sieve;
3.3 taking the sieved sludge powder and rice hull powder, mixing the sludge powder and the rice hull powder according to the proportion of 53:47, uniformly mixing, and then sieving with a 140-mesh sieve;
3.4 putting the sieved mixture into a muffle furnace at 850 ℃ to be heated for 2 hours, cooling to room temperature, and sieving by a 140-mesh sieve to obtain mixed burning ash;
3.5 taking the Shell coal gasification fly ash, completely drying and fully crushing the Shell coal gasification fly ash into small particles, and then sieving the small particles with a 140-mesh sieve;
3.6 taking the sieved mixed burning ash, the Shell coal gasification fly ash and the sludge obtained in the step 3.1, mixing the materials according to the proportion of 72:10:18, uniformly mixing the materials, and sieving the mixture by a 140-mesh sieve;
3.7 adding 2 kg of the sieved powder into a granulator, using water as a bonding agent, controlling the rotating speed of the granulator to be 45r/min, controlling the granulation time to be 5min, and finishing the manufacturing of the raw material balls when certain viscosity can be sensed by touching with fingers;
3.8 placing the raw material balls obtained in the step 3.7 in an oven at 120 ℃ for drying for 5 min;
3.9 placing the dried raw material balls in a muffle furnace at 485 ℃ for preheating for 23min, then directly heating to 1060 ℃ for roasting, and keeping the temperature for 14.7min to obtain the biomass sludge ceramsite. The obtained biomass sludge ceramsite is composed of 33.84% of rice hulls, 10% of fly ash and 56.16% of oven-dried sludge.
3.10 cooling the fired biomass sludge ceramsite to room temperature.
And (3) ceramsite performance identification: the sludge ceramsite prepared in the example 3 has the water absorption of 37.003 percent, the cylinder pressure strength of 5.6Mpa, the porosity of 49.4 percent and the specific surface area of 18.7 multiplied by 10 percent, which are detected by a method of the industrial standard CJ/T299-plus 2008 for water treatment4。
Application example 1
The biomass sludge ceramsite prepared in example 1 is used as a primary sedimentation tank filter material for treating industrial wastewater, and Pb in the industrial wastewater2+The initial concentration of the raw material is 100mg/L, the adding amount of the biomass sludge ceramsite is 5g/L, and Pb in the sewage before and after treatment is subjected to flame atomic absorption spectrophotometry2+The content is measured. Shows that the industrial wastewater, Pb, is treated by using the filter material of the invention2+The removal rate of the catalyst can reach 98.79 percent.
Application example 2
The biomass sludge ceramsite prepared in example 2 is used as a primary sedimentation tank filter material for treating industrial wastewater, and Pb in the industrial wastewater2+Is initially richThe degree is 200mg/L, the adding amount of the biomass sludge ceramsite is 5g/L, and Pb in the sewage before and after treatment is subjected to flame atomic absorption spectrophotometry2+The content is measured. Shows that the industrial wastewater, Pb, is treated by using the filter material of the invention2+The removal rate of the catalyst can reach 99.07 percent.
Application example 3
The biomass sludge ceramsite prepared in example 3 is used as a primary sedimentation tank filter material for treating industrial wastewater, and Cr in the industrial wastewater6+The initial concentration of the biomass sludge ceramsite is 180mg/L, the adding amount of the biomass sludge ceramsite is 16g/L, and Cr in the sewage before and after treatment is subjected to flame atomic absorption spectrophotometry6+The content is measured. Shows that the industrial wastewater, Cr, is treated by using the filter material of the invention6+The removal rate of the catalyst can reach 63.02 percent.
The embodiments show that the biomass sludge ceramsite prepared by the invention has the advantages of high water absorption, strong barrel pressure strength, low breakage rate and loss rate, large porosity and specific surface area, can achieve better adsorption effect, is pressure-resistant and is not easy to break, and is suitable for treating industrial wastewater.
While some embodiments of the present invention have been presented herein, it will be appreciated by those skilled in the art that changes may be made to the embodiments herein without departing from the spirit of the invention. The above embodiments are merely exemplary and should not be construed as limiting the scope of the invention.
Claims (10)
1. The biomass sludge ceramsite is characterized by comprising the following raw materials in percentage by weight: 31.5-37.5% of biomass raw material, 10-15% of fly ash and 47.5-58.5% of oven-dried sludge, wherein the fly ash is Shell coal gasification fly ash formed by sintering at 1400-1600 ℃.
2. The biomass sludge ceramsite according to claim 1, wherein the biomass raw material is one or more of wood chips or rice hulls, and the sludge is secondary sludge produced by municipal sewage treatment plants.
3. The biomass sludge ceramsite of claim 1, wherein the porosity of the biomass sludge ceramsite is 48.9% -49.4%, and the specific surface area is 18.5 x 104～18.7×104The water absorption rate is 36.024-37.003%, and the cylinder pressure strength is 5.6-5.7 MPa.
4. The preparation method of the biomass sludge ceramsite as claimed in any one of claims 1-3, which is characterized by comprising the following steps:
s1: completely drying sludge of an urban sewage treatment plant, fully crushing the sludge into small particles, and sieving the small particles;
s2: completely drying the biomass raw material, grinding the biomass raw material into powder and sieving the powder;
s3: uniformly mixing the sludge particles obtained in the step 1 and the biomass powder obtained in the step 2 in proportion and then sieving;
s4: heating the mixture obtained in the step 3 in a muffle furnace at 700-850 ℃ for 2-3 hours to obtain mixed burning ash;
s5: cooling the mixed burning ash obtained in the step 4 to room temperature, grinding and sieving;
s6: completely drying, grinding and sieving the Shell coal gasification fly ash;
s7: uniformly mixing the mixed burning ash obtained in the step 5, the fly ash obtained in the step 6 and the sludge particles obtained in the step 1 according to a proportion, grinding and sieving;
s8: adding the mixture obtained in the step 7 into a granulator to prepare raw material balls, and drying the raw material balls;
s9: and roasting the dried raw material balls in a muffle furnace at high temperature to obtain the biomass sludge ceramsite.
5. The method for preparing biomass sludge ceramsite according to claim 4, wherein in the step 3, the proportion of sludge particles and biomass powder is as follows: 50-55: 45-50.
6. The preparation method of biomass sludge ceramsite according to claim 4, wherein in step 7, the proportion of mixed burning ash, fly ash and sludge particles is as follows: 70% -75%: 10% -15%: 15 to 20 percent.
7. The preparation method of biomass sludge ceramsite according to claim 4, wherein in the step 8, water is used as a binder in the granulation process, the rotation speed of a granulator is 30-45 r/min, and the granulation time is 5-10 min.
8. The preparation method of the biomass sludge ceramsite according to claim 4, wherein in the step 9, the raw material pellets are placed in a muffle furnace at 450-500 ℃ to be preheated for 20-25 min, then the temperature is raised to 1100-1150 ℃ to be roasted, and the temperature is kept for 10-15 min after the roasting is finished.
9. The preparation method of biomass sludge ceramsite according to claim 4, wherein in the step 1-7, the aperture of a screen used for sieving is 100-140 meshes.
10. The use method of the biomass sludge ceramsite as claimed in any one of claims 1-3, wherein the biomass sludge ceramsite is used as an industrial wastewater treatment filter material for adsorbing heavy metals in industrial wastewater.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114409425A (en) * | 2022-01-26 | 2022-04-29 | 河北工业大学 | Preparation method of sludge-based porous high-water-absorption ceramsite |
| CN114804910A (en) * | 2022-06-02 | 2022-07-29 | 许泽胜 | Industrial and agricultural urban solid waste ceramsite and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004262728A (en) * | 2003-03-04 | 2004-09-24 | Ube Ind Ltd | Manufacturing process of lightweight aggregate which uses coal ash and sewage sludge incineration ash as raw materials |
| CN102515834A (en) * | 2011-11-11 | 2012-06-27 | 安徽工业大学 | Preparation method of waterworks sludge ceramsites for pretreating micro-polluted water |
| CN104311098A (en) * | 2014-09-30 | 2015-01-28 | 东南大学 | Method of preparing porous material by utilizing shell coal gasification fly ash |
| CN108675815A (en) * | 2018-05-25 | 2018-10-19 | 南昌大学 | A kind of preparation method of flyash sludge ceramsite |
| CN111393142A (en) * | 2020-03-28 | 2020-07-10 | 普尔顿环保科技(海南)有限公司 | Biomass sludge ceramsite and preparation method and application thereof |
-
2021
- 2021-10-21 CN CN202111225291.0A patent/CN113816763A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004262728A (en) * | 2003-03-04 | 2004-09-24 | Ube Ind Ltd | Manufacturing process of lightweight aggregate which uses coal ash and sewage sludge incineration ash as raw materials |
| CN102515834A (en) * | 2011-11-11 | 2012-06-27 | 安徽工业大学 | Preparation method of waterworks sludge ceramsites for pretreating micro-polluted water |
| CN104311098A (en) * | 2014-09-30 | 2015-01-28 | 东南大学 | Method of preparing porous material by utilizing shell coal gasification fly ash |
| CN108675815A (en) * | 2018-05-25 | 2018-10-19 | 南昌大学 | A kind of preparation method of flyash sludge ceramsite |
| CN111393142A (en) * | 2020-03-28 | 2020-07-10 | 普尔顿环保科技(海南)有限公司 | Biomass sludge ceramsite and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 童思意等: "我国固体废弃物制备陶粒的研究进展" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114409425A (en) * | 2022-01-26 | 2022-04-29 | 河北工业大学 | Preparation method of sludge-based porous high-water-absorption ceramsite |
| CN114804910A (en) * | 2022-06-02 | 2022-07-29 | 许泽胜 | Industrial and agricultural urban solid waste ceramsite and preparation method and application thereof |
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