CN112745102A - Sintered insulating brick with high resource utilization rate and processing technology thereof - Google Patents
Sintered insulating brick with high resource utilization rate and processing technology thereof Download PDFInfo
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- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
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- 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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- 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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- 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
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- C04B33/24—Manufacture of porcelain or white ware
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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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
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- 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 application relates to the field of sintered insulating bricks, and particularly discloses a sintered insulating brick with high resource utilization rate and a processing technology thereof. A sintered insulating brick with high resource utilization rate comprises the following raw materials in parts by weight: 80-110 parts of engineering residue soil, 25-35 parts of municipal sludge, 10-22 parts of biogas residue and 11-15 parts of oily water; the preparation method comprises the following steps: s1, crushing and screening raw materials; s2, ageing the raw materials; s3, extruding and slitting to obtain a blank; s4, drying the blank; and S5, blank roasting. The application provides a high resource utilization's sintered insulating brick, it has the advantage that improves kitchen garbage, life excrement and urine resource utilization, green.
Description
Technical Field
The application relates to the field of sintered insulating bricks, in particular to a sintered insulating brick with high resource utilization rate and a processing technology thereof.
Background
The engineering residual soil is only one kind of construction waste, and according to the construction waste called in urban construction waste management regulation, the engineering residual soil refers to waste soil, waste materials and other wastes generated in the process of building, rebuilding, expanding and dismantling various buildings, structures, pipe networks and the like by construction units and house decoration and fitment by residents.
Kitchen waste, commonly known as swill, also known as swill and hogwash, is a domestic waste formed in the process of domestic consumption by residents, is extremely easy to rot and deteriorate, emits foul smell, and spreads bacteria and viruses.
Along with the rapid development of urbanization in China, the production amount of engineering muck, kitchen waste and domestic excrement is increasing day by day, and the problems of incomplete engineering muck treatment facilities, low resource utilization rate and serious stacking exist; the kitchen waste treatment excessively depends on landfill treatment; the domestic excrement is discharged after fermentation treatment, and the utilization rate is low.
In the prior art, engineering muck is used as aggregate particles, and municipal sludge is used as a binder to process sintered insulating bricks, so that the resource utilization rate of the engineering muck is improved, but the resource utilization rate of kitchen waste and domestic excrement is still low.
Disclosure of Invention
In order to improve the resource utilization rate, the application provides a sintered insulating brick with high resource utilization rate and a processing technology thereof.
In a first aspect, the present application provides a sintered insulating brick with high resource utilization rate, which adopts the following technical scheme:
a sintered insulating brick with high resource utilization rate is prepared from the following raw materials in parts by weight: 80-110 parts of engineering residue soil, 25-35 parts of municipal sludge, 10-22 parts of biogas residue and 11-15 parts of oily water;
wherein the weight ratio of the biogas residues is 2: (0.5-1) fermenting the kitchen waste and the domestic excrement to obtain solid residues, wherein the weight ratio of oily water to oily water is 2: (0.5-1) oily water obtained by fermenting the kitchen waste and the domestic excrement.
By adopting the above technical scheme, engineering dregs in coordination with municipal sludge, kitchen garbage, domestic waste prepares sintering insulating brick, carry out fermentation treatment with kitchen garbage and domestic waste, organic solid wastes in kitchen garbage and the domestic waste is through microbial fermentation, after deodorization and the maturity, all utilize remaining solid residue and greasy dirt water after the fermentation, solid residue is as the raw materials of sintering insulating brick, water when oily water is as raw materials stirring and mixing, carry out furthest's utilization to kitchen garbage and domestic waste, be favorable to improving kitchen garbage and domestic waste's resource utilization ratio, reduce the pollution of kitchen garbage and domestic waste to the environment, accord with green development theory.
Besides, biogas generated by fermenting the kitchen waste and the domestic excrement can be utilized, so that the resource utilization rate is further improved.
In a second aspect, the application provides a process for processing a sintered insulating brick with high resource utilization rate, which adopts the following technical scheme:
the processing technology of the sintered insulating brick with high resource utilization rate comprises the following steps:
s1, crushing and screening engineering residue soil, municipal sludge and biogas residues;
s2, mixing and stirring engineering residue soil, municipal sludge and biogas residues with 3/5-4/5 parts by weight of oily water uniformly, and then aging the uniformly mixed raw materials for 24-36 h;
s3, adding the residual oily water into the aged raw materials, uniformly stirring, and extruding and slitting the uniformly stirred mixture to obtain a blank;
s4, drying the blank;
s5, feeding the dried blank into a roasting kiln for roasting at the roasting temperature of 950-1100 ℃ for 3-5 h;
and S6, carrying out heat preservation and cooling on the roasted blank to obtain the sintered heat preservation brick.
By adopting the technical scheme, the heat-insulating sintered brick with better performance can be prepared by sequentially carrying out fermentation separation, raw material crushing, aging treatment, drying treatment and roasting treatment on the kitchen waste and the municipal waste, carrying out reasonable layout on the process flow and reasonably configuring the aging time, the sintering temperature and the sintering time.
Preferably, the screening particle size in S1 is 0.5-2 mm.
By adopting the technical scheme, the engineering residue soil, the kitchen waste and the domestic excrement particles in the particle size range are wrapped by the municipal sludge more easily, so that the engineering residue soil, the kitchen waste and the domestic excrement particles are not easy to segregate with the municipal sludge, a more compact structure is formed, and the compressive strength of the sintered insulating brick is improved.
Preferably, the crushed and screened raw material in the S1 is dried until the water content is 9-11%.
By adopting the technical scheme, when the water content of the raw materials is too high, the air in the raw materials is discharged during molding, but the evaporation of water during roasting increases the air holes in the materials, and the compressive strength of the sintered insulating brick is reduced; when the water content is too low, the density of the green body is low and the internal voids are large during molding, so that the performance is reduced; the water content of the raw materials is in the range of 9-11%, and the prepared sintered insulating brick has better overall performance.
Preferably, in the step S3, before adding water, the aged raw material is extruded and crushed, and the crushed particle size is 0.5-2 mm.
Through adopting above-mentioned technical scheme, the extrusion of the raw materials after the ageing is handled for the municipal sludge granule is rolled into the slice, and the granule production of slice mud and other raw materials is connected in the parcel, then after adding water stirring, and municipal sludge and other raw materials granule can more complete misce bene, are favorable to improving the compressive strength of sintering insulating brick.
Preferably, the extrusion process in S3 is performed under vacuum.
Through adopting above-mentioned technical scheme, extrude the raw materials under vacuum condition, can avoid in the extrusion in-process air gets into the raw materials for produce the bubble in the blank of extrusion, too much bubble produces can influence the compressive strength of sintered insulating brick.
Preferably, the drying process of S4 is divided into primary drying, secondary drying and tertiary drying.
Through adopting above-mentioned technical scheme, carry out the drying many times step by step to the blank for the blank dehydration drying effect is better, is favorable to improving the wholeness ability of sintering insulating brick.
Preferably, the roasting kiln is provided with a cooling system, the heat of primary drying is derived from the waste heat of the cooling system of the roasting kiln, and the primary drying time is 30-40 min.
Through adopting above-mentioned technical scheme, the waste heat that produces the roasting kiln cooling system is collected and is acted on the blank, carries out drying once to the blank, carries out abundant utilization to the heat that the roasting kiln produced, reduces thermal waste, further improves resource utilization.
Preferably, the heat of the secondary drying and the tertiary drying comes from smoke heat and waste heat of the roasting kiln; the temperature of smoke heat and waste heat in the secondary drying is 100-120 ℃, and the secondary drying time is 1-2 h; the temperature of smoke heat and waste heat in the third drying is 160-180 ℃, and the third drying time is 1-2 h.
By adopting the technical scheme, the blanks subjected to quick drying are sequentially subjected to secondary drying and tertiary drying, and the blanks are dried step by step to be more completely dehydrated, so that the drying effect is better, and the integral performance of the sintered insulating bricks is favorably improved; in addition, smoke heat and waste heat of the roasting kiln are collected, the positions of the secondary drying section and the tertiary drying section are reasonably arranged, the smoke heat and the waste heat of the roasting kiln provide heat for the secondary drying and the tertiary drying, the heat generated by the roasting kiln is fully utilized, the waste of the heat is reduced, and the resource utilization rate is further improved.
Preferably, in S5, the dried blank is sent to a roasting kiln and then preheated, where the preheating temperature is 500-.
By adopting the technical scheme, the blank still contains a certain amount of moisture when entering the roasting kiln, the moisture is discharged along with roasting, if the temperature rapidly reaches higher temperature, the moisture is rapidly increased, and the blank can be burst without extrusion, so that the quality of the blank is influenced, and the preheating treatment is carried out before roasting, thereby being beneficial to improving the quality of the sintered insulating brick.
In summary, the present application has the following beneficial effects:
1. after the kitchen waste and the domestic excrement are subjected to fermentation treatment, the residual solid residues and oily water are used for processing and manufacturing the sintered insulating bricks, the kitchen waste and the domestic excrement are utilized to the maximum extent, and the resource utilization rate is effectively improved.
2. In the application, secondary fine crushing is carried out after aging treatment, so that sludge and other raw material particles can be more completely and uniformly mixed, and the compressive strength of the sintered insulating brick is favorably improved.
3. In this application, utilize the waste heat of roasting kiln cooling system to carry out fast drying to the blank, utilize the cigarette heat and the waste heat of roasting kiln to carry out secondary drying, cubic drying to the blank in proper order, the heat that make full use of roasting kiln produced further improves resource utilization.
Detailed Description
The present application will be described in further detail with reference to examples.
Raw materials
The municipal sludge comes from a sewage treatment plant in Shijiazhuang high and new areas;
the kitchen waste is respectively from quada quan, quan wana quan small cattle in quan, and quan donggu liantian eight-treasure porridge in quan of quan.
Preparation example
Preparation example 1
The preparation method of the biogas residue and the oily water comprises the following steps:
adding 100kg of kitchen waste from quack feed and 25kg of domestic excrement into a fermentation tank for anaerobic fermentation treatment, wherein the anaerobic fermentation adopts a combined anaerobic digestion reactor, and the technical parameters of the anaerobic digestion reactor are as follows: a complete mixing type reactor adopts a mechanical stirring mode; the working temperature is 33 ℃; the residence time is 30 d. After the fermentation is finished, pumping out the fermentation product, filtering, and drying the solid matter obtained by filtering to obtain biogas residues; the liquid obtained by filtration was adjusted to pH 6.5 to obtain oily water.
Preparation example 2
Adding 100kg of kitchen waste from quack feed and 37kg of domestic feces into a fermentation tank for anaerobic fermentation treatment, wherein the anaerobic fermentation adopts a combined anaerobic digestion reactor, and the technical parameters of the anaerobic digestion reactor are as follows: a complete mixing type reactor adopts a mechanical stirring mode; the working temperature is 35 ℃; the dwell time 32 d. After the fermentation is finished, pumping out the fermentation product, filtering, and drying the solid matter obtained by filtering to obtain biogas residues; the liquid obtained by filtration was adjusted to pH 7 to obtain oily water.
Preparation example 3
Adding 100kg of kitchen waste from quack feed and 50kg of domestic excrement into a fermentation tank for anaerobic fermentation treatment, wherein the anaerobic fermentation adopts a combined anaerobic digestion reactor, and the technical parameters of the anaerobic digestion reactor are as follows: a complete mixing type reactor adopts a mechanical stirring mode; the working temperature is 37 ℃; a dwell time 34 d. After the fermentation is finished, pumping out the fermentation product, filtering, and drying the solid matter obtained by filtering to obtain biogas residues; the liquid obtained by filtration was adjusted to pH 7.5 to obtain oily water.
Preparation example 4
In contrast to preparation example 2, the kitchen waste was obtained from calf.
Preparation example 5
Different from the preparation example 2, the kitchen waste is from cereal-desmodium mixed congee.
Examples
Example 1
The processing technology of the sintered insulating brick with high resource utilization rate comprises the following steps:
s1, crushing and screening engineering muck, municipal sludge and biogas residues, wherein the screening particle size is 1mm, and then drying the screened engineering muck, municipal sludge and biogas residues until the water content is 10%;
s2, mixing and uniformly stirring 80kg of engineering residue soil, 35kg of municipal sludge, 10kg of biogas residue and 9kg of oily water, and then transporting the uniformly mixed raw materials to an aging chamber for aging treatment, wherein the aging treatment time is 24 hours;
s3, conveying the aged raw materials into a roller crusher for tabletting and crushing, wherein the crushing grain diameter is 0.5mm, adding 6kg of oily water into the raw materials discharged from the roller crusher for strong stirring, and conveying the uniformly stirred mixture into a vacuum extruder for extruding and slitting to obtain a blank;
s4, drying the blank: firstly, feeding a blank into a primary drying system for primary drying, wherein the heat of the primary drying system comes from the waste heat generated by a cooling system of a roasting kiln (provided with a cooling system), the temperature is 40 ℃, and the time of the blank in the primary drying system is 30 min; the blank from the primary drying system enters a drying kiln, the heat in the drying kiln comes from smoke heat and waste heat of the roasting kiln, the blank is divided into a low-temperature drying section and a tertiary drying section according to the position, away from a smoke heat and waste heat outlet in the roasting kiln, in the drying kiln, the temperature of the smoke heat and the waste heat of the secondary drying section is 100 ℃, and the temperature of the smoke heat and the waste heat of the tertiary drying section is 180 ℃; the blank is dried in a kiln and then sequentially passes through a secondary drying section and a tertiary drying section, the time of the blank in the secondary drying section is 2 hours, and the time of the blank in the tertiary drying section is 1 hour;
s5, feeding the dried blank into a roasting kiln, preheating in the roasting kiln, wherein during preheating, the blank is heated to 110 ℃ at the speed of 25 ℃/h, then the blank is heated to 400 ℃ at the speed of 60 ℃/h, and finally the blank is heated to 500 ℃ at the speed of 90 ℃/h to finish preheating; after preheating is finished, roasting the green body at 950 ℃ for 5 hours;
s6, after sintering is finished, reducing the temperature in the roasting kiln to 40 ℃, keeping the temperature of the blank in the roasting kiln at 40 ℃ for 2 hours, and taking the blank out of the kiln to obtain a sintered insulating brick;
wherein the biogas residue and the oily water come from preparation example 2.
Example 2
The processing technology of the sintered insulating brick with high resource utilization rate comprises the following steps:
s1, crushing and screening engineering muck, municipal sludge and biogas residues, wherein the screening particle size is 1mm, and then drying the screened engineering muck, municipal sludge and biogas residues until the water content is 10%;
s2, mixing and uniformly stirring 95kg of engineering residue soil, 30kg of municipal sludge, 16kg of biogas residue and 9kg of oily water, and then transporting the uniformly mixed raw materials to an aging chamber for aging for 30 hours;
s3, conveying the aged raw materials into a roller crusher for tabletting and crushing, wherein the crushing grain diameter is 1mm, adding 4kg of oily water into the raw materials discharged from the roller crusher for strong stirring, and conveying the uniformly stirred mixture into a vacuum extruder for extruding and slitting to obtain a blank;
s4, drying the blank: firstly, feeding a blank into a primary drying system for primary drying, wherein the heat of the primary drying system comes from the waste heat generated by a cooling system of a roasting kiln (provided with a cooling system), the temperature is 45 ℃, and the time of the blank in the primary drying system is 35 min; the blank from the primary drying system enters a drying kiln, the heat in the drying kiln comes from smoke heat and waste heat of the roasting kiln, the blank is divided into a low-temperature drying section and a tertiary drying section according to the position, away from a smoke heat and waste heat outlet in the roasting kiln, in the drying kiln, the temperature of the smoke heat and the waste heat of the secondary drying section is 110 ℃, and the temperature of the smoke heat and the waste heat of the tertiary drying section is 170 ℃; the blank is dried in a kiln and then sequentially passes through a secondary drying section and a tertiary drying section, the time of the blank in the secondary drying section is 1.5 hours, and the time of the blank in the tertiary drying section is 1.5 hours;
s5, feeding the dried blank into a roasting kiln, preheating in the roasting kiln, wherein during preheating, the blank is heated to 120 ℃ at the speed of 30 ℃/h, then the blank is heated to 450 ℃ at the speed of 70 ℃/h, and finally the blank is heated to 600 ℃ at the speed of 100 ℃/h to finish preheating; after preheating is finished, roasting the green body at 1050 ℃ for 4 hours;
s6, after sintering is finished, reducing the temperature in the roasting kiln to 45 ℃, keeping the temperature of the green body in the roasting kiln at 45 ℃ for 1.5h, and taking the green body out of the kiln to obtain a sintered insulating brick;
wherein the biogas residue and the oily water come from preparation example 2.
Example 3
The processing technology of the sintered insulating brick with high resource utilization rate comprises the following steps:
s1, crushing and screening engineering muck, municipal sludge and biogas residues, wherein the screening particle size is 1mm, and then drying the screened engineering muck, municipal sludge and biogas residues until the water content is 10%;
s2, mixing and uniformly stirring 110kg of engineering residue soil, 25kg of municipal sludge, 22kg of biogas residue and 8kg of oily water, and then transporting the uniformly mixed raw materials to an aging chamber for aging for 36 hours;
s3, conveying the aged raw materials into a roller crusher for tabletting and crushing, wherein the crushing grain diameter is 2mm, adding 3kg of oily water into the raw materials discharged from the roller crusher for strong stirring, and conveying the uniformly stirred mixture into a vacuum extruder for extruding and slitting to obtain a blank;
s4, drying the blank: firstly, feeding a blank into a primary drying system for primary drying, wherein the heat of the primary drying system comes from the waste heat generated by a cooling system of a roasting kiln (provided with a cooling system), the temperature is 50 ℃, and the time of the blank in the primary drying system is 40 min; the blank from the primary drying system enters a drying kiln, the heat in the drying kiln comes from smoke heat and waste heat of the roasting kiln, the blank is divided into a low-temperature drying section and a tertiary drying section according to the position, away from a smoke heat and waste heat outlet in the roasting kiln, in the drying kiln, the temperature of the smoke heat and the waste heat of the secondary drying section is 120 ℃, and the temperature of the smoke heat and the waste heat of the tertiary drying section is 160 ℃; the blank is dried in a kiln and then sequentially passes through a secondary drying section and a tertiary drying section, wherein the time of the blank in the secondary drying section is 1 hour, and the time of the blank in the tertiary drying section is 2 hours;
s5, feeding the dried blank into a roasting kiln, preheating in the roasting kiln, wherein during preheating, the blank is heated to 130 ℃ at the speed of 35 ℃/h, then the blank is heated to 500 ℃ at the speed of 80 ℃/h, and finally the blank is heated to 700 ℃ at the speed of 110 ℃/h to finish preheating; after preheating is finished, roasting the green body at 1100 ℃ for 3 h;
s6, after sintering is finished, reducing the temperature in the roasting kiln to 40 ℃, keeping the temperature of the blank in the roasting kiln at 40 ℃ for 2 hours, and taking the blank out of the kiln to obtain a sintered insulating brick;
wherein the biogas residue and the oily water come from preparation example 2.
Example 4
In contrast to example 2, biogas residues and oily water were obtained from preparation example 1.
Example 5
In contrast to example 2, biogas residues and oily water were obtained from preparation example 3.
Example 6
Different from the embodiment 2, the raw materials after the aging treatment are directly added with water and stirred without secondary refinement.
Example 7
Unlike example 2, the sieved particle size in S1 was 3mm, and the crushed particle size in S3 was 0.5 mm.
Example 8
Unlike example 2, the sieved particle size in S1 was 3mm, and the crushed particle size in S3 was 3 mm.
Example 9
Unlike example 2, the water content of the crushed and sieved raw material in S1 was 9%.
Example 10
Unlike example 2, the water content of the crushed and sieved raw material in S1 was 11%.
Example 11
Different from the embodiment 2, when the blank is dried, the blank is directly dried for 1.5h in the environment of 170 ℃.
Example 12
Different from the embodiment 2, S5, the dried blank is sent into a roasting kiln, and the blank is roasted directly at 1050 ℃ for 4 hours.
Example 13
In contrast to example 2, biogas residues, oily water, were obtained from preparation example 4.
Example 14
In contrast to example 2, biogas residues and oily water were obtained from preparation example 5.
Comparative example
Comparative example 1
A preparation method of the building waste baked brick comprises the following steps:
(1) crushing the construction waste into 1cm in particle size, removing iron by using a magnet, grinding the iron-removed construction waste into powder, screening out powder with the particle size of 2mm, stacking the impurity-removed construction waste powder by adding water, controlling the water content to be 16%, and then aging for 7 days;
(2) uniformly mixing 35kg of the aged construction waste obtained in the step (1), 25kg of river sludge with the water content of 20%, 17kg of fly ash, 11kg of coal gangue and 3kg of adhesive, and then adding 9kg of kiln dust to adjust the water content to 16%;
(3) fully stirring, rolling and crushing by a double-roller machine, extruding into a block by a brick extruding machine, extruding into strips, pressing into a green brick body, longitudinally and orderly arranging through holes on the green brick, staggering through holes in adjacent rows, cutting to obtain a formed porous green brick, drying, adopting a far air brake, roasting for 4 hours at 1000 ℃, and taking out of a kiln to obtain the porous green brick.
Comparative example 2
In a case different from example 2, 19kg of engineering sludge was used instead of biogas residue, and 9kg of water was used instead of 9kg of oily water.
Performance test
Detection method
The compression strength, heat transfer coefficient and blooming condition of the sintered insulating brick are tested according to the sintered insulating brick and the insulating block (GB26538-2011), and the test results are shown in Table 1.
TABLE 1 Performance test results
By combining the examples 1-11 and the comparative example 1 and combining the table 1, it can be seen that in the examples 1-11, the compressive strength, the heat transfer coefficient, the blooming condition and the like of the sintered insulating brick are not greatly different from those in the comparative example 1, and are even better than those in the comparative example 1.
By combining the examples 1 to 3 and table 1, it can be seen that the sintered insulating bricks prepared in the examples 1 to 3 have better compressive strength, heat transfer coefficient, blooming condition and the like, and the performance of the example 2 is better, which illustrates that the proportion and the processing technology of the sintered insulating brick in the example 2 are optimal.
By combining the example 2 and the comparative example 2 and combining the table 1, it can be seen that the performance of the sintered insulating brick prepared in the example 2 is superior to that of the comparative example 2, and the same processing technology is used for adding the fermentation residues of the kitchen waste and the domestic feces into the sintered insulating brick, so that the performance of the sintered insulating brick is not affected.
By combining example 2 with comparative examples 4 to 5 and table 1, it can be seen that the baked insulating bricks prepared from the biogas residues and the oily water obtained in preparation examples 1 to 3 have better performance, and the preparation method of preparation example 2 is better.
By combining the example 2 and the example 6 and combining the table 1, it can be seen that the performance of the sintered insulating brick prepared in the example 2 is better than that of the sintered insulating brick prepared in the example 6 in the compressive strength and the heat transfer coefficient, and the fact that the secondary fine crushing is performed after the raw material aging treatment is proved to be beneficial to improving the overall performance of the sintered insulating brick.
By combining the embodiment 2 with the embodiments 7 to 8 and combining the table 1, the performance of the sintered insulating brick prepared by the raw material with the grain diameter of 0.5 to 3mm is better.
By combining example 2 with comparative examples 9-10 and Table 1, it can be seen that the performance of the sintered insulating brick prepared with the raw material water content in the range of 9-11% is excellent.
By combining the embodiment 2 and the embodiment 11 and combining the table 1, it can be seen that the performance of the sintered insulating brick prepared in the embodiment 2 is better than that of the embodiment 11 in compressive strength and heat transfer coefficient, and it is described that the segmented and step-by-step drying of the blank before the blank is dried is beneficial to improving the overall performance of the sintered insulating brick.
By combining the example 2 and the example 12 and combining the table 1, it can be seen that the performance of the sintered insulating brick prepared in the example 2 is better than that of the example 12 in the compressive strength and the heat transfer coefficient, and the fact that the gradual preheating is performed before the blank enters the roasting kiln for roasting is beneficial to improving the overall performance of the sintered insulating brick.
By combining the examples 2 and 13-14 and combining the table 1, it can be seen that the overall performance of the baked insulating brick prepared from the kitchen waste from different types of restaurants is basically the same, which indicates that the overall performance of the baked insulating brick is not greatly affected by the different types of kitchen waste.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The sintered insulating brick with high resource utilization rate is characterized by comprising the following raw materials in parts by weight: 80-110 parts of engineering residue soil, 25-35 parts of municipal sludge, 10-22 parts of biogas residue and 11-15 parts of oily water;
wherein the weight ratio of the biogas residues is 2: (0.5-1) fermenting the kitchen waste and the domestic excrement to obtain solid residues, wherein the weight ratio of oily water to oily water is 2: (0.5-1) oily water obtained by fermenting the kitchen waste and the domestic excrement.
2. The processing technology of the sintered insulating brick with high resource utilization rate according to claim 1, characterized by comprising the following steps:
s1, crushing and screening engineering residue soil, municipal sludge and biogas residues;
s2, mixing and stirring engineering residue soil, municipal sludge and biogas residues with 3/5-4/5 parts by weight of oily water uniformly, and then aging the uniformly mixed raw materials for 24-36 h;
s3, adding the residual oily water into the aged raw materials, uniformly stirring, and extruding and slitting the uniformly stirred mixture to obtain a blank;
s4, drying the blank;
s5, feeding the dried blank into a roasting kiln for roasting at the roasting temperature of 950-1100 ℃ for 3-5 h;
and S6, carrying out heat preservation and cooling on the roasted blank to obtain the sintered heat preservation brick.
3. The processing technology of the sintered insulating brick with high resource utilization rate according to claim 2, characterized in that: the screening particle size in the S1 is 0.5-2 mm.
4. The processing technology of the sintered insulating brick with high resource utilization rate according to claim 2, characterized in that: and drying the crushed and screened raw material in the S1 until the water content is 9-11%.
5. The processing technology of the sintered insulating brick with high resource utilization rate according to claim 2, characterized in that: in the S3, before adding water, the aged raw material is extruded and crushed, and the crushed particle size is 0.5-2 mm.
6. The processing technology of the sintered insulating brick with high resource utilization rate according to claim 2, characterized in that: the extrusion process in S3 is performed under vacuum.
7. The processing technology of the sintered insulating brick with high resource utilization rate according to claim 2, characterized in that: the S4 drying process comprises primary drying, secondary drying and tertiary drying.
8. The processing technology of the sintered insulating brick with high resource utilization rate according to claim 7, characterized in that: the roasting kiln is provided with a cooling system, the heat of primary drying is from the waste heat of the cooling system of the roasting kiln, the temperature is 40-50 ℃, and the primary drying time is 30-40 min.
9. The processing technology of the sintered insulating brick with high resource utilization rate according to claim 7, characterized in that: the heat of the secondary drying and the tertiary drying is from smoke heat and waste heat of the roasting kiln; the temperature of smoke heat and waste heat in the secondary drying is 100-120 ℃, and the secondary drying time is 1-2 h; the temperature of smoke heat and waste heat in the third drying is 160-180 ℃, and the third drying time is 1-2 h.
10. The process for processing the high-resource-utilization sintered insulating brick as claimed in claim 27, wherein the process comprises the following steps: and in the step S5, the dried blank is sent into a roasting kiln and then is preheated and roasted, wherein the preheating temperature is 500-700 ℃.
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