CN110723961A - Environment-friendly microporous brick prepared by comprehensively utilizing solid wastes and preparation method thereof - Google Patents
Environment-friendly microporous brick prepared by comprehensively utilizing solid wastes and preparation method thereof Download PDFInfo
- Publication number
- CN110723961A CN110723961A CN201910900767.2A CN201910900767A CN110723961A CN 110723961 A CN110723961 A CN 110723961A CN 201910900767 A CN201910900767 A CN 201910900767A CN 110723961 A CN110723961 A CN 110723961A
- Authority
- CN
- China
- Prior art keywords
- sludge
- brick
- friendly
- kiln
- water content
- 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
-
- 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
-
- 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
- C04B33/1328—Waste materials; Refuse; Residues without additional clay
-
- 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
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3284—Zinc oxides, zincates, cadmium oxides, cadmiates, mercury oxides, mercurates or oxide forming salts thereof
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/444—Halide containing anions, e.g. bromide, iodate, chlorite
- C04B2235/445—Fluoride containing anions, e.g. fluosilicate
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Treatment Of Sludge (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to the technical field of solid waste resource utilization, in particular to an environment-friendly microporous brick prepared by comprehensively utilizing solid waste and a preparation method thereof. The environment-friendly microporous brick fully utilizes rich mineral substances and inorganic substances in mine ore washing sludge, rich organic substances in sludge of domestic sewage treatment plants and rich calorific value of biomass particles, reduces the self weight of the microporous brick, ensures the sintering strength of the microporous brick, reduces the energy consumption of external heating energy, and solves the problem of recycling comprehensive utilization of solid wastes such as the mine ore washing sludge, the sludge of the domestic sewage treatment plants, crop straws and the like. The preparation method of the environment-friendly microporous brick comprehensively utilizing the solid wastes has the characteristics of simple process, low production cost and suitability for large-scale production.
Description
Technical Field
The invention relates to the technical field of solid waste resource utilization, in particular to an environment-friendly microporous brick prepared by comprehensively utilizing solid waste and a preparation method thereof.
Background
The traditional mine ore washing sludge treatment method mainly realizes sludge-water separation through natural sedimentation, and then is developed to add chemical agents such as PAC (polyaluminium chloride), PAFC (polyaluminium ferric chloride), PAM (polyacrylamide) and the like into the sludge-water to accelerate sludge sedimentation, and then forms sludge cakes with low water content for landfill treatment through coagulation stirring, centrifugal filter pressing (or plate-and-frame filter pressing) and the like. Because the waste is caused by not carrying out the resource utilization of the sludge, the method does not meet the requirements of green mines, clean production and comprehensive utilization of resources.
The traditional sludge treatment method of the domestic sewage treatment plant generally takes sanitary landfill, incineration and biological fertilizer preparation as main materials, and also comprises the steps of drying, extruding and molding the sludge and sintering to prepare bricks. However, the organic matter content in the sludge is high, so that the strength of the baked bricks is not enough.
The traditional comprehensive utilization approaches of crop straws are generally direct returning to fields, livestock raising and passing through the abdomen returning to fields, papermaking, methane or pyrolysis heat energy utilization and the like, and with the technological development, new comprehensive utilization methods for processing straws into feeds, fertilizers, industrial raw materials, edible fungus base materials, biomass energy and the like are developed. However, most of the utilization methods have the problems of low utilization rate, insufficient marketability and the like.
In the prior art, the weight of the microporous brick is heavier, the sintering strength is not good enough, in addition, the sintering temperature of the current microporous brick is 1000-1200 ℃, the method belongs to medium-high temperature sintering, the energy consumption is large, and the construction and sintering cost of a tunnel kiln is higher.
Disclosure of Invention
One of the purposes of the invention is to provide an environment-friendly microporous brick prepared by comprehensively utilizing solid wastes, aiming at the defects of the prior art, the environment-friendly microporous brick prepared by comprehensively utilizing the solid wastes has light weight and good sintering strength, reduces the energy consumption and solves the problem of comprehensive utilization of solid wastes.
The second purpose of the invention is to provide a preparation method of the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes against the defects of the prior art.
In order to achieve one of the purposes, the invention adopts the following technical scheme:
the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes comprises the following raw materials in percentage by weight:
preferably, the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes comprises the following raw materials in percentage by weight:
more preferably, the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes comprises the following raw materials in percentage by weight:
the biomass particles are made of crop straws;
the crop straw is one or a composition of more than two of corn straw, wheat straw, rice straw, cotton straw, soybean straw or sorghum straw.
The metal chelating agent is polyacrylic acid;
the sintering aid is one or a composition of more than two of aluminum oxide, zinc oxide or magnesium fluoride.
In order to achieve the second purpose, the invention adopts the following technical scheme:
the preparation method of the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes comprises the following steps:
firstly, pretreating mine ore washing sludge:
step one, centrifugal separation: carrying out centrifugal separation on the mine ore washing sludge to separate sand and stone with certain particle size to obtain mine ore washing sludge slurry;
step two, storing and homogenizing: inputting the mine ore washing sludge slurry obtained in the step one into a storage homogenizing tank for mixing and homogenizing;
step three, precipitation treatment: sending the homogenized mine ore washing sludge into a sludge sedimentation tank, adding a chemical agent for chemical conditioning so as to accelerate sludge sedimentation through flocculation and realize solid-liquid separation;
step four, dehydration treatment: leading away the supernatant of the sludge sedimentation tank in the third step for recycling, pumping the sludge precipitated at the lower layer into a plate-and-frame filter press for dehydration, and making mine ore washing sludge cakes with certain water content for later use;
secondly, pretreating sludge of a domestic sewage treatment plant:
step one, homogenizing sludge: pumping sludge of a domestic sewage treatment plant into a sludge storage tank provided with stirring equipment, realizing sludge homogenization by stirring, and avoiding final precipitation to obtain sludge of the sludge storage tank;
step two, chemical tempering: pumping the sludge in the sludge storage tank obtained in the step one into a gravity sludge concentration tank, adding a chemical agent for chemical tempering to change the moisture combination mode in the sludge, and converting bound water in the sludge into free water to obtain sludge in the sludge concentration tank;
step three, filter pressing dehydration: pumping the sludge in the sludge concentration tank obtained in the step two into a plate-and-frame filter press for filter pressing and dehydration to prepare sludge cakes of the domestic sewage treatment plant with certain water content for later use;
step three, preparing biomass particles:
step one, drying crop straws: sending the crop straws into a straw dryer for drying treatment, and drying the crop straws to a certain water content;
step two, crushing: crushing the dried crop straws into certain particle size by using a crop straw crusher, then uniformly mixing by using a mixer, and controlling certain water content to obtain straw powder;
step three, softening treatment: feeding the straw powder obtained in the step two into a high-temperature steam softening machine, and introducing high-temperature steam with a certain temperature for softening treatment to obtain softened straw powder;
step four, conveying the softened straw powder into a granulator for extrusion granulation, and pressing into biomass particles with certain specification and certain water content;
fourthly, mixing solid wastes for brick making and sintering:
step one, mixing materials: feeding the mine ore washing sludge cake, the domestic sewage treatment plant sludge cake, the biomass particles, the metal chelating agent and the sintering aid into a powerful extrusion stirrer according to the formula ratio, and fully stirring and mixing to obtain a mixture;
step two, aging the mixture: conveying the mixture obtained in the step one to a stirrer for homogenization, then conveying the mixture to an aging warehouse for aging for a certain time, and reducing the aged material to a certain moisture content to obtain aged clinker;
step three, extruding the aged material to make bricks: feeding the aged clinker into a vacuum extrusion brick making machine to prepare a green brick with a certain specification, and controlling the water content of the green brick;
step four, drying and dehydrating: sending the green bricks obtained in the step three into a tunnel drying kiln, drying and dehydrating in hot air by using the roasting waste heat, and controlling the water content of the dried green bricks to obtain dried green bricks;
step five, putting the green bricks into a kiln for roasting: after the dried green bricks enter the tunnel kiln, spraying natural gas into the kiln through uniformly distributed nozzles to generate open flame, carrying out heat conduction on the green bricks, promoting the green bricks to slowly heat up, causing biomass particles in the green bricks and organic matters in sludge cakes of domestic sewage treatment plants to be carbonized and combusted, and roasting for a certain time at a certain temperature to obtain finished bricks;
step six, cooling and drawing: and step five, after roasting, entering a kiln body cooling stage, and gradually reducing the temperature in the kiln within a certain time, so that the finished brick can be taken out of the kiln after being reduced to a certain temperature, and the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes is obtained.
In the technical scheme, in the first step, the pretreatment of mine ore washing sludge is as follows:
step one, centrifugal separation: pumping the mine ore washing sludge into a rotary barrel type centrifuge for centrifugal separation so as to separate sand and stone with the particle size of more than 1mm to obtain mine ore washing sludge slurry;
step two, storing and homogenizing: inputting the mine ore washing sludge slurry obtained in the step one into a storage homogenizing tank for mixing and homogenizing, wherein under the stirring action of the flow impact force of the sludge and an external stirrer, the sludge can be promoted to be mixed, the homogenizing action is achieved, and the influence on subsequent treatment caused by different types of sludge in different batches is avoided;
step three, precipitation treatment: sending the homogenized mine ore washing sludge slurry into a sludge sedimentation tank, and adding polyaluminum ferric chloride for chemical conditioning so as to accelerate sludge sedimentation through flocculation and realize solid-liquid separation;
step four, dehydration treatment: and (3) introducing the supernatant of the sludge sedimentation tank in the third step into a clean water tank for recycling, pumping the sludge precipitated at the lower layer into a plate-and-frame filter press for dehydration, and preparing mine ore washing sludge cakes with the water content of 60-65% for later use.
In the above technical scheme, the second step is sludge pretreatment in a domestic sewage treatment plant:
step one, homogenizing sludge: the sludge of the domestic sewage treatment plant automatically flows into a sludge collecting well through an underground pipeline, and then is pumped into a sludge storage tank provided with stirring equipment, the sludge is homogenized through stirring, and final precipitation is avoided, so that sludge in the sludge storage tank is obtained;
step two, chemical tempering: pumping the sludge in the sludge storage tank obtained in the step one into a radial flow type gravity sludge concentration tank, adding polyacrylamide for chemical tempering to change the moisture combination mode in the sludge, and converting bound water in the sludge into free water to obtain sludge in the sludge concentration tank;
step three, filter pressing dehydration: pumping the sludge in the sludge concentration tank obtained in the step two into a plate-and-frame filter press for filter pressing and dehydration to prepare sludge cakes of the domestic sewage treatment plant with the water content of 60-65% for later use.
In the above technical solution, the third step is a biomass particle preparation:
step one, drying crop straws: the crop straws are sequentially sent into a straw dryer through a feeding machine and a screw conveyor for drying treatment, and the crop straws are dried until the water content is 15% -20%;
step two, crushing: crushing the dried crop straws into the particle size of less than 6mm by using a hammer type crop straw crusher, sieving the crushed crop straws by using a sieve with the aperture of 6mm, uniformly mixing the sieved materials by using a mixer, and controlling the water content to be 15-20% to obtain straw powder;
step three, softening treatment: feeding the straw powder obtained in the step two into a high-temperature steam softening machine, and introducing high-temperature steam with the temperature of 120-200 ℃ for softening treatment to obtain softened straw powder;
and fourthly, conveying the softened straw powder into a granulator for extrusion granulation, and pressing into biomass particles with the diameter of 1-2 mm, the length of 2-4 mm and the water content of 17-18%.
In the above technical solution, in the fourth step, brick making and sintering are performed by mixing solid wastes:
step one, mixing materials: feeding the mine ore washing sludge cake, the domestic sewage treatment plant sludge cake, the biomass particles, the metal chelating agent and the sintering aid into a powerful extrusion stirrer according to the formula ratio, and fully stirring and mixing to obtain a mixture;
step two, aging the mixture: conveying the mixture obtained in the step one to a planetary wheel mill mixer for homogenization, then conveying the mixture to an aging warehouse for aging for 50-60 h, and reducing the water content of the aged material to 35-40% to obtain aged 'clinker';
step three, extruding the aged material to make bricks: sending the aged clinker into a vacuum extrusion brick making machine to prepare a green brick with the specification of 240mm multiplied by 115mm multiplied by 53mm, and controlling the water content of the green brick to be 33-38%;
step four, drying and dehydrating: stacking the green bricks obtained in the step three on a kiln car by using an automatic green brick stacking machine, conveying the green bricks into a tunnel drying kiln, drying and dehydrating the green bricks for 20 to 30 hours in hot air at the temperature of between 100 and 150 ℃ by using roasting waste heat, and controlling the water content of the dried green bricks to be between 10 and 15 percent to obtain dried green bricks;
step five, putting the green bricks into a kiln for roasting: after the dried green bricks enter the tunnel kiln, spraying natural gas into the kiln through uniformly distributed nozzles to generate open flame, carrying out heat conduction on the green bricks, promoting the green bricks to slowly heat up, triggering biomass particles in the green bricks and organic matters in sludge cakes of domestic sewage treatment plants to carbonize and burn, and roasting for 25-30 h at 800-1000 ℃ to obtain finished bricks;
step six, cooling and drawing: and step five, after roasting, entering a kiln body cooling stage, and gradually reducing the temperature in the kiln within 7-9 h to ensure that the finished brick is reduced to below 40 ℃ and then taken out of the kiln to obtain the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes.
Compared with the prior art, the invention has the beneficial effects that:
(1) the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes fully utilizes rich mineral substances and inorganic substances in mine ore washing sludge, rich organic substances in sludge of a domestic sewage treatment plant and rich calorific value of biomass particles, reduces the self weight of the microporous brick, ensures the sintering strength of the microporous brick, reduces the energy consumption of external heating energy, and solves the problem of comprehensive utilization of solid resource wastes such as the mine ore washing sludge, the sludge of the domestic sewage treatment plant, crop straws and the like.
(2) According to the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes, after organic matters and biomass particles of sludge cakes of domestic sewage treatment plants are combusted, a certain number of porous structures which have the pore diameters of 0.2-2 mm and the depths of 1-4 mm and are communicated with each other through micron-sized pores can be formed in the brick body, so that the environment-friendly microporous brick has high water permeability and air permeability; meanwhile, the microporous structure of the brick body and the activated carbon crystals generated in the brick body have the functions of sound absorption, noise reduction, purification, adsorption and the like, and can be used for pavement paving in sponge cities and can also be used in dry wall masonry engineering of respiratory buildings.
(3) According to the preparation method of the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes, the water content of mine ore washing sludge and domestic sewage treatment plant sludge after conditioning, press filtration and drying is 60-65%, and the adding amount of chemical agents for conditioning and the energy consumption of a press filter are reduced.
(4) The invention provides a preparation method of an environment-friendly microporous brick prepared by comprehensively utilizing solid wastes, the roasting temperature of the microporous brick is 800-1000 ℃, the brick belongs to low-temperature sintering, the energy consumption is lower than that of the conventional sintered brick which is usually sintered at the medium-high temperature of 1000-1200 ℃, the construction and sintering cost of a tunnel kiln is reduced, pathogens, parasites (eggs) and the like in sludge of a domestic sewage treatment plant can be completely decomposed, and the harmless treatment of the sludge of the domestic sewage treatment plant is realized.
(5) According to the preparation method of the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes, the added polyacrylic acid is used as a metal chelating agent, so that heavy metal ions in sludge can be converted into crystals to be solidified, the dissolution coefficient of the heavy metal ions in the sludge can be reduced, and the solidification and stabilization of harmful substances such as heavy metals are realized.
(6) According to the preparation method of the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes, the added aluminum oxide, zinc oxide and magnesium fluoride are used as sintering aids, and form a binary, ternary or multicomponent low-temperature co-melting system with other substances in sludge, so that low-temperature sintering is realized, and solidification and stabilization of harmful substances such as heavy metal ions in the sludge are facilitated.
(7) The preparation method of the environment-friendly microporous brick comprehensively utilizing the solid wastes provided by the invention has the characteristics of simple process, low production cost and suitability for large-scale production.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Wherein, the water content is the mass percent water content.
Example 1.
An environment-friendly microporous brick prepared by comprehensively utilizing solid wastes comprises the following raw materials in percentage by weight:
wherein, the biomass particles are made of crop straws.
Wherein the crop straw is one or a composition of more than two of corn straw, wheat straw, rice straw, cotton straw, soybean straw or sorghum straw.
Wherein the metal chelating agent is polyacrylic acid.
Wherein, the sintering aid is one or a composition of more than two of aluminum oxide, zinc oxide or magnesium fluoride.
The preparation method of the environment-friendly microporous brick prepared by comprehensively utilizing the solid wastes comprises the following steps:
firstly, pretreating mine ore washing sludge:
step one, centrifugal separation: carrying out centrifugal separation on the mine ore washing sludge to separate sand and stone with certain particle size to obtain mine ore washing sludge slurry;
step two, storing and homogenizing: inputting the mine ore washing sludge slurry obtained in the step one into a storage homogenizing tank for mixing and homogenizing;
step three, precipitation treatment: sending the homogenized mine ore washing sludge into a sludge sedimentation tank, adding a chemical agent for chemical conditioning so as to accelerate sludge sedimentation through flocculation and realize solid-liquid separation;
step four, dehydration treatment: leading away the supernatant of the sludge sedimentation tank in the third step for recycling, pumping the sludge precipitated at the lower layer into a plate-and-frame filter press for dehydration, and making mine ore washing sludge cakes with certain water content for later use;
secondly, pretreating sludge of a domestic sewage treatment plant:
step one, homogenizing sludge: pumping sludge of a domestic sewage treatment plant into a sludge storage tank provided with stirring equipment, realizing sludge homogenization by stirring, and avoiding final precipitation to obtain sludge of the sludge storage tank;
step two, chemical tempering: pumping the sludge in the sludge storage tank obtained in the step one into a gravity sludge concentration tank, adding a chemical agent for chemical tempering to change the moisture combination mode in the sludge, and converting bound water in the sludge into free water to obtain sludge in the sludge concentration tank;
step three, filter pressing dehydration: pumping the sludge in the sludge concentration tank obtained in the step two into a plate-and-frame filter press for filter pressing and dehydration to prepare sludge cakes of the domestic sewage treatment plant with certain water content for later use;
step three, preparing biomass particles:
step one, drying crop straws: sending the crop straws into a straw dryer for drying treatment, and drying the crop straws to a certain water content;
step two, crushing: crushing the dried crop straws into certain particle size by using a crop straw crusher, then uniformly mixing by using a mixer, and controlling certain water content to obtain straw powder;
step three, softening treatment: feeding the straw powder obtained in the step two into a high-temperature steam softening machine, and introducing high-temperature steam with a certain temperature for softening treatment to obtain softened straw powder;
step four, conveying the softened straw powder into a granulator for extrusion granulation, and pressing into biomass particles with certain specification and certain water content;
fourthly, mixing solid wastes for brick making and sintering:
step one, mixing materials: feeding the mine ore washing sludge cake, the domestic sewage treatment plant sludge cake, the biomass particles, the metal chelating agent and the sintering aid into a powerful extrusion stirrer according to the formula ratio, and fully stirring and mixing to obtain a mixture;
step two, aging the mixture: conveying the mixture obtained in the step one to a stirrer for homogenization, then conveying the mixture to an aging warehouse for aging for a certain time, and reducing the aged material to a certain moisture content to obtain aged clinker;
step three, extruding the aged material to make bricks: feeding the aged clinker into a vacuum extrusion brick making machine to prepare a green brick with a certain specification, and controlling the water content of the green brick;
step four, drying and dehydrating: sending the green bricks obtained in the step three into a tunnel drying kiln, drying and dehydrating in hot air by using the roasting waste heat, and controlling the water content of the dried green bricks to obtain dried green bricks;
step five, putting the green bricks into a kiln for roasting: after the dried green bricks enter the tunnel kiln, spraying natural gas into the kiln through uniformly distributed nozzles to generate open flame, carrying out heat conduction on the green bricks, promoting the green bricks to slowly heat up, causing biomass particles in the green bricks and organic matters in sludge cakes of domestic sewage treatment plants to be carbonized and combusted, and roasting for a certain time at a certain temperature to obtain finished bricks;
step six, cooling and drawing: and step five, after roasting, entering a kiln body cooling stage, and gradually reducing the temperature in the kiln within a certain time, so that the finished brick can be taken out of the kiln after being reduced to a certain temperature, and the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes is obtained.
Example 2.
An environment-friendly microporous brick prepared by comprehensively utilizing solid wastes comprises the following raw materials in percentage by weight:
wherein, the biomass particles are made of crop straws.
In this embodiment, the crop stalks are a combination of corn stalks, wheat stalks, rice straws, cotton stalks, soybean stalks and sorghum stalks.
Wherein the metal chelating agent is polyacrylic acid.
Wherein the sintering aid is magnesium fluoride.
The preparation method of the environment-friendly microporous brick prepared by comprehensively utilizing the solid wastes comprises the following steps:
firstly, pretreating mine ore washing sludge:
step one, centrifugal separation: pumping the mine ore washing sludge into a rotary barrel type centrifuge for centrifugal separation so as to separate sand and stone with the particle size of more than 1mm to obtain mine ore washing sludge slurry;
step two, storing and homogenizing: inputting the mine ore washing sludge slurry obtained in the step one into a storage homogenizing tank for mixing and homogenizing, wherein under the stirring action of the flow impact force of the sludge and an external stirrer, the sludge can be promoted to be mixed, the homogenizing action is achieved, and the influence on subsequent treatment caused by different types of sludge in different batches is avoided;
step three, precipitation treatment: sending the homogenized mine ore washing sludge slurry into a sludge sedimentation tank, and adding polyaluminum ferric chloride for chemical conditioning so as to accelerate sludge sedimentation through flocculation and realize solid-liquid separation;
step four, dehydration treatment: introducing the supernatant of the sludge sedimentation tank in the third step into a clean water tank for recycling, pumping the sludge precipitated at the lower layer into a plate-and-frame filter press for dehydration, and preparing mine ore washing sludge cakes with the water content of 62% for later use;
secondly, pretreating sludge of a domestic sewage treatment plant:
step one, homogenizing sludge: the sludge of the domestic sewage treatment plant automatically flows into a sludge collecting well through an underground pipeline, and then is pumped into a sludge storage tank provided with stirring equipment, the sludge is homogenized through stirring, and final precipitation is avoided, so that sludge in the sludge storage tank is obtained;
step two, chemical tempering: pumping the sludge in the sludge storage tank obtained in the step one into a radial flow type gravity sludge concentration tank, adding polyacrylamide for chemical tempering to change the moisture combination mode in the sludge, and converting bound water in the sludge into free water to obtain sludge in the sludge concentration tank;
step three, filter pressing dehydration: pumping the sludge of the sludge concentration tank obtained in the step two into a plate-and-frame filter press for filter pressing and dehydration to prepare sludge cakes of the domestic sewage treatment plant with the water content of 62% for later use;
step three, preparing biomass particles:
step one, drying crop straws: the crop straws are sequentially sent into a straw dryer through a feeding machine and a screw conveyor for drying treatment, and the crop straws are dried until the water content is 18%;
step two, crushing: crushing the dried crop straws into the particle size of less than 6mm by using a hammer type crop straw crusher, sieving the crushed crop straws by using a sieve with the aperture of 6mm, uniformly mixing the sieved materials by using a mixer, and controlling the water content to be 18% to obtain straw powder;
step three, softening treatment: feeding the straw powder obtained in the step two into a high-temperature steam softening machine, and introducing high-temperature steam of 160 ℃ for softening treatment to obtain softened straw powder;
step four, conveying the softened straw powder into a granulator for extrusion granulation, and pressing into biomass particles with the diameter of 1.5mm, the length of 3mm and the water content of 17.5%;
fourthly, mixing solid wastes for brick making and sintering:
step one, mixing materials: feeding the mine ore washing sludge cake, the domestic sewage treatment plant sludge cake, the biomass particles, the metal chelating agent and the sintering aid into a powerful extrusion stirrer according to the formula ratio, and fully stirring and mixing to obtain a mixture;
step two, aging the mixture: conveying the mixture obtained in the step one to a planetary wheel mill mixer for homogenization, then conveying the mixture to an aging warehouse for aging for 55 hours, and reducing the moisture content of the aged material to 38% to obtain aged clinker;
step three, extruding the aged material to make bricks: sending the aged clinker into a vacuum extrusion brick making machine to prepare a green brick with the specification of 240mm multiplied by 115mm multiplied by 53mm, and controlling the water content of the green brick to be 35%;
step four, drying and dehydrating: stacking the green bricks obtained in the step three on a kiln car by using an automatic green brick stacking machine, conveying the green bricks into a tunnel drying kiln, drying and dehydrating the green bricks for 25 hours in hot air at 125 ℃ by using the roasting waste heat, and controlling the water content of the dried green bricks to be 12% to obtain dried green bricks;
step five, putting the green bricks into a kiln for roasting: after the dried green bricks enter the tunnel kiln, spraying natural gas into the kiln through uniformly distributed nozzles to generate open flame, carrying out heat conduction on the green bricks, promoting the green bricks to slowly heat up, triggering biomass particles in the green bricks and organic matters in sludge cakes of domestic sewage treatment plants to be carbonized and combusted, and roasting for 28 hours at 900 ℃ to obtain finished bricks;
step six, cooling and drawing: and step five, after roasting, entering a kiln body cooling stage, and gradually reducing the temperature in the kiln within 8 hours to ensure that the finished brick is reduced to below 40 ℃ and then taken out of the kiln, thereby obtaining the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes.
Example 3.
An environment-friendly microporous brick prepared by comprehensively utilizing solid wastes comprises the following raw materials in percentage by weight:
wherein, the biomass particles are made of crop straws.
In this embodiment, the crop straw is corn straw.
Wherein the metal chelating agent is polyacrylic acid.
Wherein the sintering aid is a composition of aluminum oxide and zinc oxide.
The preparation method of the environment-friendly microporous brick prepared by comprehensively utilizing the solid wastes comprises the following steps:
firstly, pretreating mine ore washing sludge:
step one, centrifugal separation: pumping the mine ore washing sludge into a rotary barrel type centrifuge for centrifugal separation so as to separate sand and stone with the particle size of more than 1mm to obtain mine ore washing sludge slurry;
step two, storing and homogenizing: inputting the mine ore washing sludge slurry obtained in the step one into a storage homogenizing tank for mixing and homogenizing, wherein under the stirring action of the flow impact force of the sludge and an external stirrer, the sludge can be promoted to be mixed, the homogenizing action is achieved, and the influence on subsequent treatment caused by different types of sludge in different batches is avoided;
step three, precipitation treatment: sending the homogenized mine ore washing sludge slurry into a sludge sedimentation tank, and adding polyaluminum ferric chloride for chemical conditioning so as to accelerate sludge sedimentation through flocculation and realize solid-liquid separation;
step four, dehydration treatment: introducing the supernatant of the sludge sedimentation tank in the third step into a clean water tank for recycling, pumping the sludge precipitated at the lower layer into a plate-and-frame filter press for dehydration, and preparing mine ore washing sludge cakes with the water content of 60% for later use;
secondly, pretreating sludge of a domestic sewage treatment plant:
step one, homogenizing sludge: the sludge of the domestic sewage treatment plant automatically flows into a sludge collecting well through an underground pipeline, and then is pumped into a sludge storage tank provided with stirring equipment, the sludge is homogenized through stirring, and final precipitation is avoided, so that sludge in the sludge storage tank is obtained;
step two, chemical tempering: pumping the sludge in the sludge storage tank obtained in the step one into a radial flow type gravity sludge concentration tank, adding polyacrylamide for chemical tempering to change the moisture combination mode in the sludge, and converting bound water in the sludge into free water to obtain sludge in the sludge concentration tank;
step three, filter pressing dehydration: pumping the sludge in the sludge concentration tank obtained in the step two into a plate-and-frame filter press for filter pressing and dehydration to prepare sludge cakes of the domestic sewage treatment plant with the water content of 60% for later use;
step three, preparing biomass particles:
step one, drying crop straws: the crop straws are sequentially sent into a straw dryer through a feeding machine and a screw conveyor for drying treatment, and the crop straws are dried until the water content is 15%;
step two, crushing: crushing the dried crop straws into the particle size of less than 6mm by using a hammer type crop straw crusher, sieving the crushed crop straws by using a sieve with the aperture of 6mm, uniformly mixing the sieved materials by using a mixer, and controlling the water content to be 15% to obtain straw powder;
step three, softening treatment: feeding the straw powder obtained in the step two into a high-temperature steam softening machine, and introducing high-temperature steam of 120 ℃ for softening treatment to obtain softened straw powder;
conveying the softened straw powder into a granulator for extrusion granulation, and pressing into biomass particles with the diameter of 1mm, the length of 2mm and the water content of 17%;
fourthly, mixing solid wastes for brick making and sintering:
step one, mixing materials: feeding the mine ore washing sludge cake, the domestic sewage treatment plant sludge cake, the biomass particles, the metal chelating agent and the sintering aid into a powerful extrusion stirrer according to the formula ratio, and fully stirring and mixing to obtain a mixture;
step two, aging the mixture: conveying the mixture obtained in the step one to a planetary wheel mill mixer for homogenization, then conveying the mixture to an aging warehouse for aging for 50 hours, and reducing the moisture content of the aged material to 35% to obtain aged clinker;
step three, extruding the aged material to make bricks: sending the aged clinker into a vacuum extrusion brick making machine to prepare a green brick with the specification of 240mm multiplied by 115mm multiplied by 53mm, and controlling the water content of the green brick to be 33 percent;
step four, drying and dehydrating: stacking the green bricks obtained in the third step on a kiln car by using an automatic green brick stacking machine, conveying the green bricks into a tunnel drying kiln, drying and dehydrating the green bricks for 30 hours in hot air at 100 ℃ by using the roasting waste heat, and controlling the water content of the dried green bricks to be 10% to obtain dried green bricks;
step five, putting the green bricks into a kiln for roasting: after the dried green bricks enter the tunnel kiln, spraying natural gas into the kiln through uniformly distributed nozzles to generate open flame, carrying out heat conduction on the green bricks, promoting the green bricks to slowly heat up, triggering biomass particles in the green bricks and organic matters in sludge cakes of domestic sewage treatment plants to be carbonized and combusted, and roasting at 800 ℃ for 30 hours to obtain finished bricks;
step six, cooling and drawing: and step five, after roasting, entering a kiln body cooling stage, and gradually reducing the temperature in the kiln within 7 hours to ensure that the finished brick is reduced to below 40 ℃ and then taken out of the kiln, thereby obtaining the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes.
Example 4.
An environment-friendly microporous brick prepared by comprehensively utilizing solid wastes comprises the following raw materials in percentage by weight:
wherein, the biomass particles are made of crop straws.
In this embodiment, the crop stalks are a combination of wheat stalks, rice straws and sorghum stalks.
Wherein the metal chelating agent is polyacrylic acid.
Wherein the sintering aid is magnesium fluoride.
The preparation method of the environment-friendly microporous brick prepared by comprehensively utilizing the solid wastes comprises the following steps:
firstly, pretreating mine ore washing sludge:
step one, centrifugal separation: pumping the mine ore washing sludge into a rotary barrel type centrifuge for centrifugal separation so as to separate sand and stone with the particle size of more than 1mm to obtain mine ore washing sludge slurry;
step two, storing and homogenizing: inputting the mine ore washing sludge slurry obtained in the step one into a storage homogenizing tank for mixing and homogenizing, wherein under the stirring action of the flow impact force of the sludge and an external stirrer, the sludge can be promoted to be mixed, the homogenizing action is achieved, and the influence on subsequent treatment caused by different types of sludge in different batches is avoided;
step three, precipitation treatment: sending the homogenized mine ore washing sludge slurry into a sludge sedimentation tank, and adding polyaluminum ferric chloride for chemical conditioning so as to accelerate sludge sedimentation through flocculation and realize solid-liquid separation;
step four, dehydration treatment: introducing the supernatant of the sludge sedimentation tank in the third step into a clean water tank for recycling, pumping the sludge precipitated at the lower layer into a plate-and-frame filter press for dehydration, and preparing mine ore washing sludge cakes with the water content of 65% for later use;
secondly, pretreating sludge of a domestic sewage treatment plant:
step one, homogenizing sludge: the sludge of the domestic sewage treatment plant automatically flows into a sludge collecting well through an underground pipeline, and then is pumped into a sludge storage tank provided with stirring equipment, the sludge is homogenized through stirring, and final precipitation is avoided, so that sludge in the sludge storage tank is obtained;
step two, chemical tempering: pumping the sludge in the sludge storage tank obtained in the step one into a radial flow type gravity sludge concentration tank, adding polyacrylamide for chemical tempering to change the moisture combination mode in the sludge, and converting bound water in the sludge into free water to obtain sludge in the sludge concentration tank;
step three, filter pressing dehydration: pumping the sludge in the sludge concentration tank obtained in the step two into a plate-and-frame filter press for filter pressing and dehydration to prepare sludge cakes of the domestic sewage treatment plant with the water content of 65% for later use;
step three, preparing biomass particles:
step one, drying crop straws: the method comprises the following steps of (1) sequentially conveying crop straws into a straw dryer through a feeding machine and a screw conveyor for drying treatment, and drying the crop straws until the water content is 20%;
step two, crushing: crushing the dried crop straws into the particle size of less than 6mm by using a hammer type crop straw crusher, sieving the crushed crop straws by using a sieve with the aperture of 6mm, uniformly mixing the sieved materials by using a mixer, and controlling the water content to be 20% to obtain straw powder;
step three, softening treatment: feeding the straw powder obtained in the step two into a high-temperature steam softening machine, and introducing high-temperature steam of 200 ℃ for softening treatment to obtain softened straw powder;
step four, conveying the softened straw powder into a granulator for extrusion granulation, and pressing into biomass particles with the diameter of 2mm, the length of 4mm and the water content of 18%;
fourthly, mixing solid wastes for brick making and sintering:
step one, mixing materials: feeding the mine ore washing sludge cake, the domestic sewage treatment plant sludge cake, the biomass particles, the metal chelating agent and the sintering aid into a powerful extrusion stirrer according to the formula ratio, and fully stirring and mixing to obtain a mixture;
step two, aging the mixture: conveying the mixture obtained in the step one to a planetary wheel mill mixer for homogenization, then conveying the mixture to an aging warehouse for aging for 60 hours, and reducing the moisture content of the aged material to 40% to obtain aged clinker;
step three, extruding the aged material to make bricks: sending the aged clinker into a vacuum extrusion brick making machine to prepare a green brick with the specification of 240mm multiplied by 115mm multiplied by 53mm, and controlling the water content of the green brick to be 38%;
step four, drying and dehydrating: stacking the green bricks obtained in the third step on a kiln car by using an automatic green brick stacking machine, conveying the green bricks into a tunnel drying kiln, drying and dehydrating the green bricks for 20 hours in hot air at 150 ℃ by using the roasting waste heat, and controlling the water content of the dried green bricks to be 15% to obtain dried green bricks;
step five, putting the green bricks into a kiln for roasting: after the dried green bricks enter the tunnel kiln, spraying natural gas into the kiln through uniformly distributed nozzles to generate open flame, carrying out heat conduction on the green bricks, promoting the green bricks to slowly heat up, triggering biomass particles in the green bricks and organic matters in sludge cakes of domestic sewage treatment plants to be carbonized and combusted, and roasting for 25 hours at 1000 ℃ to obtain finished bricks;
step six, cooling and drawing: and step five, after roasting is finished, entering a kiln body cooling stage, and gradually reducing the temperature in the kiln within 9 hours to ensure that the finished brick is reduced to below 40 ℃ and then is taken out of the kiln, thereby obtaining the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. An environment-friendly microporous brick prepared by comprehensively utilizing solid wastes is characterized in that: the material comprises the following raw materials in percentage by weight:
2. the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes according to claim 1, characterized in that: the material comprises the following raw materials in percentage by weight:
3. the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes according to claim 1, characterized in that: the material comprises the following raw materials in percentage by weight:
4. the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes according to claim 1, characterized in that: the biomass particles are made of crop straws;
the crop straw is one or a composition of more than two of corn straw, wheat straw, rice straw, cotton straw, soybean straw or sorghum straw.
5. The environment-friendly microporous brick prepared by comprehensively utilizing solid wastes according to claim 1, characterized in that: the metal chelating agent is polyacrylic acid;
the sintering aid is one or a composition of more than two of aluminum oxide, zinc oxide or magnesium fluoride.
6. The method for preparing the environmentally friendly microporous brick prepared by comprehensively utilizing the solid wastes according to any one of claims 1 to 5, characterized in that: it comprises the following steps:
firstly, pretreating mine ore washing sludge:
step one, centrifugal separation: carrying out centrifugal separation on the mine ore washing sludge to separate sand and stone with certain particle size to obtain mine ore washing sludge slurry;
step two, storing and homogenizing: inputting the mine ore washing sludge slurry obtained in the step one into a storage homogenizing tank for mixing and homogenizing;
step three, precipitation treatment: sending the homogenized mine ore washing sludge into a sludge sedimentation tank, adding a chemical agent for chemical conditioning so as to accelerate sludge sedimentation through flocculation and realize solid-liquid separation;
step four, dehydration treatment: leading away the supernatant of the sludge sedimentation tank in the third step for recycling, pumping the sludge precipitated at the lower layer into a plate-and-frame filter press for dehydration, and making mine ore washing sludge cakes with certain water content for later use;
secondly, pretreating sludge of a domestic sewage treatment plant:
step one, homogenizing sludge: pumping sludge of a domestic sewage treatment plant into a sludge storage tank provided with stirring equipment, realizing sludge homogenization by stirring, and avoiding final precipitation to obtain sludge of the sludge storage tank;
step two, chemical tempering: pumping the sludge in the sludge storage tank obtained in the step one into a gravity sludge concentration tank, adding a chemical agent for chemical tempering to change the moisture combination mode in the sludge, and converting bound water in the sludge into free water to obtain sludge in the sludge concentration tank;
step three, filter pressing dehydration: pumping the sludge in the sludge concentration tank obtained in the step two into a plate-and-frame filter press for filter pressing and dehydration to prepare sludge cakes of the domestic sewage treatment plant with certain water content for later use;
step three, preparing biomass particles:
step one, drying crop straws: sending the crop straws into a straw dryer for drying treatment, and drying the crop straws to a certain water content;
step two, crushing: crushing the dried crop straws into certain particle size by using a crop straw crusher, then uniformly mixing by using a mixer, and controlling certain water content to obtain straw powder;
step three, softening treatment: feeding the straw powder obtained in the step two into a high-temperature steam softening machine, and introducing high-temperature steam with a certain temperature for softening treatment to obtain softened straw powder;
step four, conveying the softened straw powder into a granulator for extrusion granulation, and pressing into biomass particles with certain specification and certain water content;
fourthly, mixing solid wastes for brick making and sintering:
step one, mixing materials: feeding the mine ore washing sludge cake, the domestic sewage treatment plant sludge cake, the biomass particles, the metal chelating agent and the sintering aid into a powerful extrusion stirrer according to the formula ratio, and fully stirring and mixing to obtain a mixture;
step two, aging the mixture: conveying the mixture obtained in the step one to a stirrer for homogenization, then conveying the mixture to an aging warehouse for aging for a certain time, and reducing the aged material to a certain moisture content to obtain aged clinker;
step three, extruding the aged material to make bricks: feeding the aged clinker into a vacuum extrusion brick making machine to prepare a green brick with a certain specification, and controlling the water content of the green brick;
step four, drying and dehydrating: sending the green bricks obtained in the step three into a tunnel drying kiln, drying and dehydrating in hot air by using the roasting waste heat, and controlling the water content of the dried green bricks to obtain dried green bricks;
step five, putting the green bricks into a kiln for roasting: after the dried green bricks enter the tunnel kiln, spraying natural gas into the kiln through uniformly distributed nozzles to generate open flame, carrying out heat conduction on the green bricks, promoting the green bricks to slowly heat up, causing biomass particles in the green bricks and organic matters in sludge cakes of domestic sewage treatment plants to be carbonized and combusted, and roasting for a certain time at a certain temperature to obtain finished bricks;
step six, cooling and drawing: and step five, after roasting, entering a kiln body cooling stage, and gradually reducing the temperature in the kiln within a certain time, so that the finished brick can be taken out of the kiln after being reduced to a certain temperature, and the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes is obtained.
7. The method for preparing the environment-friendly microporous brick comprehensively utilizing solid wastes according to claim 6, characterized in that: the first step, mine ore washing sludge pretreatment:
step one, centrifugal separation: pumping the mine ore washing sludge into a rotary barrel type centrifuge for centrifugal separation so as to separate sand and stone with the particle size of more than 1mm to obtain mine ore washing sludge slurry;
step two, storing and homogenizing: inputting the mine ore washing sludge slurry obtained in the step one into a storage homogenizing tank for mixing and homogenizing, wherein under the stirring action of the flow impact force of the sludge and an external stirrer, the sludge can be promoted to be mixed, the homogenizing action is achieved, and the influence on subsequent treatment caused by different types of sludge in different batches is avoided;
step three, precipitation treatment: sending the homogenized mine ore washing sludge slurry into a sludge sedimentation tank, and adding polyaluminum ferric chloride for chemical conditioning so as to accelerate sludge sedimentation through flocculation and realize solid-liquid separation;
step four, dehydration treatment: and (3) introducing the supernatant of the sludge sedimentation tank in the third step into a clean water tank for recycling, pumping the sludge precipitated at the lower layer into a plate-and-frame filter press for dehydration, and preparing mine ore washing sludge cakes with the water content of 60-65% for later use.
8. The method for preparing the environment-friendly microporous brick comprehensively utilizing solid wastes according to claim 6, characterized in that: and the second step, sludge pretreatment of a domestic sewage treatment plant:
step one, homogenizing sludge: the sludge of the domestic sewage treatment plant automatically flows into a sludge collecting well through an underground pipeline, and then is pumped into a sludge storage tank provided with stirring equipment, the sludge is homogenized through stirring, and final precipitation is avoided, so that sludge in the sludge storage tank is obtained;
step two, chemical tempering: pumping the sludge in the sludge storage tank obtained in the step one into a radial flow type gravity sludge concentration tank, adding polyacrylamide for chemical tempering to change the moisture combination mode in the sludge, and converting bound water in the sludge into free water to obtain sludge in the sludge concentration tank;
step three, filter pressing dehydration: pumping the sludge in the sludge concentration tank obtained in the step two into a plate-and-frame filter press for filter pressing and dehydration to prepare sludge cakes of the domestic sewage treatment plant with the water content of 60-65% for later use.
9. The method for preparing the environment-friendly microporous brick comprehensively utilizing solid wastes according to claim 6, characterized in that: the third step, biomass particle preparation:
step one, drying crop straws: the crop straws are sequentially sent into a straw dryer through a feeding machine and a screw conveyor for drying treatment, and the crop straws are dried until the water content is 15% -20%;
step two, crushing: crushing the dried crop straws into the particle size of less than 6mm by using a hammer type crop straw crusher, sieving the crushed crop straws by using a sieve with the aperture of 6mm, uniformly mixing the sieved materials by using a mixer, and controlling the water content to be 15-20% to obtain straw powder;
step three, softening treatment: feeding the straw powder obtained in the step two into a high-temperature steam softening machine, and introducing high-temperature steam with the temperature of 120-200 ℃ for softening treatment to obtain softened straw powder;
and fourthly, conveying the softened straw powder into a granulator for extrusion granulation, and pressing into biomass particles with the diameter of 1-2 mm, the length of 2-4 mm and the water content of 17-18%.
10. The method for preparing the environment-friendly microporous brick comprehensively utilizing solid wastes according to claim 6, characterized in that: and fourthly, mixing solid wastes for making bricks and sintering:
step one, mixing materials: feeding the mine ore washing sludge cake, the domestic sewage treatment plant sludge cake, the biomass particles, the metal chelating agent and the sintering aid into a powerful extrusion stirrer according to the formula ratio, and fully stirring and mixing to obtain a mixture;
step two, aging the mixture: conveying the mixture obtained in the step one to a planetary wheel mill mixer for homogenization, then conveying the mixture to an aging warehouse for aging for 50-60 h, and reducing the water content of the aged material to 35-40% to obtain aged 'clinker';
step three, extruding the aged material to make bricks: sending the aged clinker into a vacuum extrusion brick making machine to prepare a green brick with the specification of 240mm multiplied by 115mm multiplied by 53mm, and controlling the water content of the green brick to be 33-38%;
step four, drying and dehydrating: stacking the green bricks obtained in the step three on a kiln car by using an automatic green brick stacking machine, conveying the green bricks into a tunnel drying kiln, drying and dehydrating the green bricks for 20 to 30 hours in hot air at the temperature of between 100 and 150 ℃ by using roasting waste heat, and controlling the water content of the dried green bricks to be between 10 and 15 percent to obtain dried green bricks;
step five, putting the green bricks into a kiln for roasting: after the dried green bricks enter the tunnel kiln, spraying natural gas into the kiln through uniformly distributed nozzles to generate open flame, carrying out heat conduction on the green bricks, promoting the green bricks to slowly heat up, triggering biomass particles in the green bricks and organic matters in sludge cakes of domestic sewage treatment plants to carbonize and burn, and roasting for 25-30 h at 800-1000 ℃ to obtain finished bricks;
step six, cooling and drawing: and step five, after roasting, entering a kiln body cooling stage, and gradually reducing the temperature in the kiln within 7-9 h to ensure that the finished brick is reduced to below 40 ℃ and then taken out of the kiln to obtain the environment-friendly microporous brick prepared by comprehensively utilizing solid wastes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910900767.2A CN110723961A (en) | 2019-09-23 | 2019-09-23 | Environment-friendly microporous brick prepared by comprehensively utilizing solid wastes and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910900767.2A CN110723961A (en) | 2019-09-23 | 2019-09-23 | Environment-friendly microporous brick prepared by comprehensively utilizing solid wastes and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110723961A true CN110723961A (en) | 2020-01-24 |
Family
ID=69218307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910900767.2A Pending CN110723961A (en) | 2019-09-23 | 2019-09-23 | Environment-friendly microporous brick prepared by comprehensively utilizing solid wastes and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110723961A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111499404A (en) * | 2020-04-26 | 2020-08-07 | 中国科学院城市环境研究所 | Method and system for preparing perforated bricks by adopting raw sludge |
| CN112094101A (en) * | 2020-08-31 | 2020-12-18 | 安徽康健新型建材有限公司 | Formula and production method of urban sludge and coal gangue hollow brick |
| CN112979275A (en) * | 2021-02-05 | 2021-06-18 | 中冶成都勘察研究总院有限公司 | Method for preparing adsorption type perforated brick from sludge with high organic matter content |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475397A (en) * | 2009-01-22 | 2009-07-08 | 上海鑫晶山淤泥研发有限公司 | Riverway sludge self-heat preserving sintering porous brick and production method thereof |
| CN101665346A (en) * | 2009-09-14 | 2010-03-10 | 佛山红狮陶瓷有限公司 | Manufacturing method of ceramic tiles with metallic luster |
| CN202322546U (en) * | 2011-11-02 | 2012-07-11 | 杨大巍 | Sewage sludge treatment device for tailing dam |
| CN103613362A (en) * | 2013-11-20 | 2014-03-05 | 广东电网公司电力科学研究院 | Light brick and preparation method thereof |
| CN103641442A (en) * | 2013-11-13 | 2014-03-19 | 绍兴市新科节能建材有限公司 | Making method for self-heat preservation lightweight brick |
| KR101376546B1 (en) * | 2012-10-24 | 2014-03-20 | 한국건설생활환경시험연구원 | Manufacturing method for clay block and clay block thereby |
| CN106278373A (en) * | 2016-08-12 | 2017-01-04 | 上海洗霸科技股份有限公司 | Utilize water-permeable brick prepared by heavy metal sewage sludge and preparation method thereof |
| CN106747496A (en) * | 2016-11-29 | 2017-05-31 | 昆山顶牛市政建设有限公司 | A kind of light-weight refractory type building brick and preparation method thereof |
| CN107151133A (en) * | 2017-06-06 | 2017-09-12 | 合肥月煌新型装饰材料有限公司 | A kind of blue bricks in building in the style of the ancients and preparation method thereof |
| CN107555951A (en) * | 2017-08-25 | 2018-01-09 | 昆明理工大学 | A kind of water conservation porous brick for sponge city and preparation method thereof |
| CN108147782A (en) * | 2017-12-25 | 2018-06-12 | 合肥佳安建材有限公司 | Sintered coal gangue hollow brick and its production method |
| CN108940576A (en) * | 2018-08-31 | 2018-12-07 | 贺州市骏鑫矿产品有限责任公司 | A kind of potassium albite production method of low cost |
-
2019
- 2019-09-23 CN CN201910900767.2A patent/CN110723961A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475397A (en) * | 2009-01-22 | 2009-07-08 | 上海鑫晶山淤泥研发有限公司 | Riverway sludge self-heat preserving sintering porous brick and production method thereof |
| CN101665346A (en) * | 2009-09-14 | 2010-03-10 | 佛山红狮陶瓷有限公司 | Manufacturing method of ceramic tiles with metallic luster |
| CN202322546U (en) * | 2011-11-02 | 2012-07-11 | 杨大巍 | Sewage sludge treatment device for tailing dam |
| KR101376546B1 (en) * | 2012-10-24 | 2014-03-20 | 한국건설생활환경시험연구원 | Manufacturing method for clay block and clay block thereby |
| CN103641442A (en) * | 2013-11-13 | 2014-03-19 | 绍兴市新科节能建材有限公司 | Making method for self-heat preservation lightweight brick |
| CN103613362A (en) * | 2013-11-20 | 2014-03-05 | 广东电网公司电力科学研究院 | Light brick and preparation method thereof |
| CN106278373A (en) * | 2016-08-12 | 2017-01-04 | 上海洗霸科技股份有限公司 | Utilize water-permeable brick prepared by heavy metal sewage sludge and preparation method thereof |
| CN106747496A (en) * | 2016-11-29 | 2017-05-31 | 昆山顶牛市政建设有限公司 | A kind of light-weight refractory type building brick and preparation method thereof |
| CN107151133A (en) * | 2017-06-06 | 2017-09-12 | 合肥月煌新型装饰材料有限公司 | A kind of blue bricks in building in the style of the ancients and preparation method thereof |
| CN107555951A (en) * | 2017-08-25 | 2018-01-09 | 昆明理工大学 | A kind of water conservation porous brick for sponge city and preparation method thereof |
| CN108147782A (en) * | 2017-12-25 | 2018-06-12 | 合肥佳安建材有限公司 | Sintered coal gangue hollow brick and its production method |
| CN108940576A (en) * | 2018-08-31 | 2018-12-07 | 贺州市骏鑫矿产品有限责任公司 | A kind of potassium albite production method of low cost |
Non-Patent Citations (3)
| Title |
|---|
| 许志茹等: "《活性污泥微生物学与分子生物学》", 31 July 2017, 哈尔滨工业大学出版社 * |
| 谢小青: "《污水处理》", 30 June 2011, 厦门大学出版社 * |
| 雍毅等: "《市政污泥特性与再生利用引论》", 31 March 2016, 中国环境出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111499404A (en) * | 2020-04-26 | 2020-08-07 | 中国科学院城市环境研究所 | Method and system for preparing perforated bricks by adopting raw sludge |
| CN112094101A (en) * | 2020-08-31 | 2020-12-18 | 安徽康健新型建材有限公司 | Formula and production method of urban sludge and coal gangue hollow brick |
| CN112979275A (en) * | 2021-02-05 | 2021-06-18 | 中冶成都勘察研究总院有限公司 | Method for preparing adsorption type perforated brick from sludge with high organic matter content |
| CN112979275B (en) * | 2021-02-05 | 2023-04-11 | 中冶成都勘察研究总院有限公司 | Method for preparing adsorption type perforated brick from sludge with high organic matter content |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110240386B (en) | Straw and sludge cooperative treatment device and method | |
| CN102206091B (en) | Method for making ceramsite by using sludge | |
| WO2018192467A1 (en) | Preparation method for ceramsite using municipal sludge as raw material | |
| CN102515706B (en) | High-performance ceramsite and preparation method thereof | |
| KR101925418B1 (en) | Method for producing phosphate fertilizer | |
| CN101386524B (en) | Method for preparing porcelain granule from waste paper-making sludge | |
| CN103693943B (en) | Method for firing ceramsite with sludge dehydrated through conditioning | |
| CN101851086B (en) | Method for producing sludge self-insulation brick | |
| CN110723961A (en) | Environment-friendly microporous brick prepared by comprehensively utilizing solid wastes and preparation method thereof | |
| CN105272159B (en) | A kind of production method of sludge baked brick | |
| CN106938914A (en) | A kind of sludge and silt sintering brick preparation method | |
| CN104649650A (en) | Novel sludge brick making technique | |
| CN102765928A (en) | Brick manufacturing method | |
| CN104140241A (en) | Solid waste muck sintered brick and preparing method thereof | |
| CN101638312B (en) | Method for preparing light ceramsite by adopting DSD acid industrial sludge | |
| CN105712739A (en) | Magnetic biological ceramsite prepared from waste incineration fly ash, and preparation method thereof | |
| CN110041051A (en) | A kind of river bottom mud and construction slurry haydite and preparation method thereof | |
| CN101613219B (en) | Method for manufacturing ceramsite by using silt and cow dung | |
| CN108793968A (en) | A kind of preparation method of high-strength environment-friendly brick | |
| CN104086159A (en) | Biogas slurry sintered brick and preparation method thereof | |
| CN107129270A (en) | A kind of method for mixing cinder and firing ceramsite by using sludge | |
| CN101941850B (en) | Method for firing ceramsite by coal slime | |
| JP6391142B2 (en) | Method for producing phosphate fertilizer | |
| JP5984572B2 (en) | Phosphate fertilizer and method for producing the same | |
| CN103011544A (en) | Method for deeply dehydrating sludge by utilizing cullet |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200124 |
|
| RJ01 | Rejection of invention patent application after publication |