CN113754407B - Method for preparing baked brick from high-dosage printing and dyeing sludge - Google Patents
Method for preparing baked brick from high-dosage printing and dyeing sludge Download PDFInfo
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Abstract
The invention relates to a method for preparing a baked brick from printing and dyeing sludge with high doping amount, belonging to the field of solid waste resource utilization. The method mainly comprises the following steps: uniformly mixing the printing and dyeing sludge and the construction waste, and granulating by using a disc granulator; the produced mud particles are then pressed with blast furnace dust, slag and construction site waste soil; the pressed green bricks are dried rapidly in a low-temperature environment to reduce cracking; and heating the dried green bricks to a set temperature, preserving heat for 2-3 hours, taking out, and naturally cooling to room temperature. According to the invention, the undried printing and dyeing sludge and the construction waste are directly mixed and granulated and then mixed with blast furnace dust, slag and construction site waste soil to press bricks, so that the doping amount of the printing and dyeing sludge can be greatly increased, a sludge dewatering link is omitted, and the prepared bricks have good quality and high strength.
Description
Technical Field
The invention relates to the technical field of solid waste resource utilization, in particular to a method for preparing a baked brick from printing and dyeing sludge with high doping amount.
Background
The dyeing wastewater occupies a large proportion in industrial wastewater in China, has complex components and contains a large amount of dye, sizing agent, surfactant and alkaline agent. The dyeing wastewater has large chromaticity, strong alkalinity and high organic matter content. Because the printing and dyeing sludge is a byproduct of printing and dyeing wastewater treatment, the printing and dyeing sludge contains a large amount of bacterial microorganisms, toxic and harmful organic residues, inorganic matters, parasites, colloid, heavy metals and other pollutants, and the treatment of improper treatment can cause great harm to the environment.
Therefore, the printing and dyeing sludge needs to be subjected to effective scientific treatment, wherein the sludge is used as a brick making raw material and is an environment-friendly treatment mode. In the existing research of preparing baked bricks by using the printing and dyeing sludge, the printing and dyeing sludge is uniformly stirred by mixing the printing and dyeing sludge with brickmaking raw materials such as fly ash, slag and the like according to a certain proportion after heat drying treatment. Firstly, drying the printing and dyeing sludge to constant weight in a baking oven, then uniformly mixing and stirring the printing and dyeing sludge and shale according to a certain proportion, and extruding and molding to obtain the baked brick, wherein the doping amount of the printing and dyeing sludge in the treatment mode is 15% or more, so that the doping amount of the printing and dyeing sludge is lower. Because the printing and dyeing sludge contains a large amount of organic matters, the organic matters are decomposed at a high temperature to generate gas to overflow to form a large number of holes, and the indexes such as compressive strength, water absorption and the like of the brick body are seriously influenced. In addition, the high water content of the printing and dyeing sludge is difficult to fully mix with other brickmaking raw materials, the printing and dyeing sludge needs to be dehydrated firstly, however, the heat drying treatment of the sludge needs to consume a large amount of energy, and the production cost is increased.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to overcome the defects in the prior art, the invention provides a method for preparing a baked brick by using high-doping amount printing and dyeing sludge, which greatly improves the doping amount of the printing and dyeing sludge and omits a sludge dehydration link.
The technical scheme adopted for solving the technical problems is as follows: a method for preparing a baked brick by printing and dyeing sludge with high doping amount comprises the following steps:
(1) Removing larger solid impurities in the undried printing and dyeing sludge, the construction waste and the construction site waste soil, and then crushing by using a crusher;
(2) Mixing 40-60% of the printing and dyeing sludge treated in the step (1) and 40-60% of the construction waste, uniformly stirring, putting into a disc granulator, granulating and homogenizing at a high speed for 0.5-1 h, controlling the angle of a granulating disc to be 30-60 ℃ and the rotating speed to be 10-20 r/min, and screening mud particles with the particle size of 2-6 mm for later use;
(3) Mixing 40-60% of the mud particles screened in the step (2) with 10-20% of blast furnace dust, 10-20% of slag and 10-50% of construction site waste soil, and then pressing and forming by a brick press;
(4) The green bricks prepared in the step three are quickly dried for 5 to 6 hours under the environment of 70 to 80 degrees;
(5) Heating the green bricks dried in the step (4) to 850-1050 ℃ at a speed of 5 ℃/min. And (3) after the temperature is raised to the set temperature, preserving heat for 2-3 hours, stopping heating after the firing is finished, and naturally cooling the fired green bricks to the room temperature.
Preferably, in the step (2), the dip angle of the granulating disc is 40-50 degrees, the rotating speed is 13-18 r/min, and the grain size range of the screened mud grains is 3.0-5.5 mm.
The beneficial effects of the invention are as follows: the invention directly mixes and granulates the undried printing and dyeing sludge and the construction waste, then mixes the undried printing and dyeing sludge and the construction waste with blast furnace dust, slag and construction waste to press bricks, can improve the mixing amount of the sludge from 10 to 15 percent of the existing method to 16 to 36 percent, can save the dehydration link of the sludge, reduces the production cost, and the manufactured brick has flat appearance, standard size and all physical properties meeting the national standard.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a flow chart of the production process of the present invention.
Detailed Description
The technical scheme of the present invention will be further described by way of examples, which are intended to illustrate the technical scheme of the present invention and not to limit the scope of the present invention further, according to a method for preparing a baked brick from high-doped printing sludge as shown in fig. 1.
Example 1
Removing larger solid impurities in the undried printing and dyeing sludge, the construction waste and the construction site waste soil, and then crushing by using a crusher; taking 40% of the treated printing and dyeing sludge and 60% of the construction waste, uniformly stirring the two, then placing the mixture into a disc granulator for granulating and homogenizing for 0.5h, wherein the angle of a granulating disc is 40 DEG, the rotating speed is 13r/min, and screening out mud particles with the particle size of 3.0-5.5 mm; then mixing 40% of the screened mud particles with 10% of blast furnace dust, 10% of slag and 40% of construction site waste soil, uniformly stirring, and pressing and forming by a brick press; rapidly drying the formed green bricks for 5 hours in a 70 DEG environment, heating to 850 DEG at a speed of 5 ℃/min, preserving heat for 2 hours, taking out, and naturally cooling to room temperature; the compressive strength of the green brick is 19.5Mpa and the water absorption is 16.9%.
Example 2
Removing larger solid impurities in the undried printing and dyeing sludge, the construction waste and the construction site waste soil, and then crushing by using a crusher; taking 45% of the treated printing and dyeing sludge and 55% of the construction waste, uniformly stirring the two, then placing the mixture into a disc granulator for granulating and homogenizing for 0.5h, wherein the angle of a granulating disc is 40 DEG, the rotating speed is 15r/min, and screening out mud particles with the particle size of 3.0-5.5 mm; then mixing 40% of the screened mud particles with 15% of blast furnace dust, 20% of slag and 25% of construction site waste soil, uniformly stirring, and pressing and forming by a brick press; rapidly drying the formed green bricks for 5 hours in a 70 DEG environment, heating to 900 DEG at a speed of 5 ℃/min, preserving heat for 2 hours, taking out, and naturally cooling to room temperature; the compressive strength of the green brick is 18.4Mpa and the water absorption is 17.5%.
Example 3
Removing larger solid impurities in the undried printing and dyeing sludge, the construction waste and the construction site waste soil, and then crushing by using a crusher; taking 50% of the treated printing and dyeing sludge and 50% of the construction waste, uniformly stirring the two, then placing the mixture into a disc granulator for 1h to granulate and homogenize, controlling the angle of a granulating disc to be 45 degrees, controlling the rotating speed to be 15r/min, and screening out mud particles with the particle size of 3.0-5.5 mm; mixing 50% of the screened mud particles with 10% of blast furnace dust, 15% of slag and 25% of construction site waste soil, uniformly stirring, and pressing and forming by a brick press; the formed green bricks are quickly dried for 6 hours under the environment of 70 ℃ and then heated to 1050 ℃ at the speed of 5 ℃/min, and are taken out to be naturally cooled to room temperature after heat preservation for 2 hours; the compressive strength of the green brick is 16.8Mpa and the water absorption is 19.2%.
Example 4
Removing larger solid impurities in the undried printing and dyeing sludge, the construction waste and the construction site waste soil, and then crushing by using a crusher; taking 45% of the treated printing and dyeing sludge and 55% of the construction waste, uniformly stirring the two, then placing the mixture into a disc granulator for 1h to granulate and homogenize, controlling the angle of a granulating disc to be 45 degrees, controlling the rotating speed to be 18r/min, and screening out mud particles with the particle size of 3.0-5.5 mm; mixing 40% of the screened mud particles with 15% of blast furnace dust, 15% of slag and 30% of construction site waste soil, uniformly stirring, and pressing and forming by a brick press; rapidly drying the formed green bricks for 6 hours in an 80-DEG environment, heating to 900 DEG at a speed of 5 ℃/min, preserving heat for 3 hours, taking out, and naturally cooling to room temperature; the compressive strength of the green brick is 17.8Mpa and the water absorption is 18.0%.
Example 5
Removing larger solid impurities in the undried printing and dyeing sludge, the construction waste and the construction site waste soil, and then crushing by using a crusher; taking 55% of the treated printing and dyeing sludge and 45% of the construction waste, uniformly stirring the two, then placing the mixture into a disc granulator for 0.5h for granulating and homogenizing, controlling the angle of a granulating disc to be 50 degrees, controlling the rotating speed to be 13r/min, and screening out mud particles with the particle size of 3.0-5.5 mm; mixing 50% of the screened mud particles with 20% of blast furnace dust, 20% of slag and 10% of construction site waste soil, uniformly stirring, and pressing and forming by a brick press; the formed green bricks are quickly dried for 6 hours under the environment of 80 ℃ and then heated to 1050 ℃ at the speed of 5 ℃/min, and the green bricks are taken out and naturally cooled to room temperature after heat preservation for 3 hours; the compressive strength of the green brick was measured to be 16.0Mpa and the water absorption was measured to be 19.7%.
Example 6
Removing larger solid impurities in the undried printing and dyeing sludge, the construction waste and the construction site waste soil, and then crushing by using a crusher; taking 40% of the treated printing and dyeing sludge and 60% of the construction waste, uniformly stirring the two, then placing the mixture into a disc granulator for 1h to granulate and homogenize, controlling the angle of a granulating disc to be 50 degrees, controlling the rotating speed to be 18r/min, and screening out mud particles with the particle size of 3.0-5.5 mm; mixing 55% of the screened mud particles with 15% of blast furnace dust, 15% of slag and 15% of construction site waste soil, uniformly stirring, and pressing and forming by a brick press; rapidly drying the formed green bricks for 5 hours in a 70 DEG environment, heating to 950 DEG at a speed of 5 ℃/min, preserving heat for 2 hours, taking out, and naturally cooling to room temperature; the compressive strength of the green brick is 17.3Mpa and the water absorption is 18.4%.
Example 7
Removing larger solid impurities in the undried printing and dyeing sludge, the construction waste and the construction site waste soil, and then crushing by using a crusher; taking 60% of the treated printing and dyeing sludge and 40% of the construction waste, uniformly stirring the two, then placing the mixture into a disc granulator for 1h to granulate and homogenize, controlling the angle of a granulating disc to be 45 degrees, controlling the rotating speed to be 15r/min, and screening out mud particles with the particle size of 3.0-5.5 mm; mixing 50% of the screened mud particles with 15% of blast furnace dust, 15% of slag and 20% of construction site waste soil, uniformly stirring, and pressing and forming by a brick press; the formed green bricks are quickly dried for 6 hours under the environment of 80 ℃ and then heated to 1050 ℃ at the speed of 5 ℃/min, and the green bricks are taken out and naturally cooled to room temperature after heat preservation for 3 hours; the compressive strength of the green brick is 15.2Mpa and the water absorption is 20.5%.
Comparative example 1
Removing larger solid impurities in the undried printing and dyeing sludge, the construction waste and the construction site waste soil, and then crushing by using a crusher; taking 50% of the treated printing and dyeing sludge and 50% of the construction waste, uniformly stirring the two, then placing the mixture into a disc granulator for 1h to granulate and homogenize, controlling the angle of a granulating disc to be 40 degrees, controlling the rotating speed to be 15r/min, and screening out mud particles with the particle size of 5.5-8.0 mm; mixing 60% of the screened mud particles with 10% of blast furnace dust, 10% of slag and 20% of construction site waste soil, uniformly stirring, and pressing and forming by a brick press; rapidly drying the formed green bricks for 5 hours in an 80-DEG environment, heating to 850 DEG at a speed of 5 ℃/min, preserving heat for 3 hours, taking out, and naturally cooling to room temperature; the compressive strength of the green brick was measured to be 6.2MPa, and the water absorption was measured to be 33.7%.
Comparative example 2
Removing larger solid impurities in the undried printing and dyeing sludge, the construction waste and the construction site waste soil, and then crushing by using a crusher; taking 40% of the treated printing and dyeing sludge and 60% of the construction waste, uniformly stirring the two, then placing the mixture into a disc granulator for 0.5h for granulating and homogenizing, controlling the angle of a granulating disc to be 45 degrees, controlling the rotating speed to be 18r/min, and screening out mud particles with the particle size of 5.5-8.0 mm; mixing 70% of the screened mud particles with 10% of blast furnace dust, 10% of slag and 10% of construction site waste soil, uniformly stirring, and pressing and forming by a brick press; rapidly drying the formed green bricks for 6 hours in a 70 DEG environment, heating to 900 DEG at a speed of 5 ℃/min, preserving heat for 3 hours, taking out, and naturally cooling to room temperature; the compressive strength of the green brick is 7.6Mpa and the water absorption is 29.3%.
Comparative example 3
Removing larger solid impurities in the undried printing and dyeing sludge, the construction waste and the construction site waste soil, and then crushing by using a crusher; taking 60% of the treated printing and dyeing sludge and 40% of the construction waste, uniformly stirring the two, then placing the mixture into a disc granulator for 1h to granulate and homogenize, controlling the angle of a granulating disc to be 50 degrees, controlling the rotating speed to be 13r/min, and screening out mud particles with the particle size of 5.5-8.0 mm; mixing 60% of the screened mud particles with 20% of blast furnace dust, 10% of slag and 10% of construction site waste soil, uniformly stirring, and pressing and forming by a brick press; the formed green bricks are quickly dried for 6 hours under the environment of 80 ℃ and then heated to 1050 ℃ at the speed of 5 ℃/min, and the green bricks are taken out and naturally cooled to room temperature after heat preservation for 3 hours; the compressive strength of the green brick is measured to be 4.2Mpa, and the water absorption is measured to be 35.7%.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (2)
1. A method for preparing a baked brick by printing and dyeing sludge with high doping amount is characterized by comprising the following steps: the method comprises the following steps:
(1) Removing larger solid impurities in the undried printing and dyeing sludge, the construction waste and the construction site waste soil, and then crushing by using a crusher;
(2) Mixing 40-60% of the printing and dyeing sludge treated in the step (1) and 40-60% of the construction waste, uniformly stirring, putting into a disc granulator, granulating and homogenizing for 0.5-1 h at a high speed, controlling the angle of a granulating disc at 30-60 ℃ and the rotating speed at 10-20 r/min, and screening out mud particles with the particle size of 2-6 mm for later use;
(3) Mixing 40-60% of the mud particles screened in the step (2) with 10-20% of blast furnace dust, 10-20% of slag and 10-50% of construction site waste soil, and then pressing and forming by a brick press;
(4) The green bricks prepared in the step (3) are dried rapidly at the temperature of 70-80 ℃;
(5) Heating the brick dried in the step (4) to 850-1050 ℃ at a speed of 5 ℃/min, keeping the temperature for 2-3 h after the temperature is raised to the set temperature, stopping heating after the firing is finished, and naturally cooling the fired brick blank to the room temperature.
2. The method for preparing the baked brick by using the high-doping amount printing and dyeing sludge as claimed in claim 1, which is characterized in that: in the step (2), the dip angle of the granulating disc is 40-50 degrees, the rotating speed is 13-18 r/min, and the particle size of the screened mud particles is 3.0-5.5 mm.
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| CN202110884020.XA CN113754407B (en) | 2021-08-03 | 2021-08-03 | Method for preparing baked brick from high-dosage printing and dyeing sludge |
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| CN102219474B (en) * | 2011-03-21 | 2014-01-15 | 莆田市建仁建材有限责任公司 | Method for manufacturing environmental-friendly brick |
| CN102329147B (en) * | 2011-06-21 | 2013-04-03 | 东莞市保源达房地产开发有限公司 | Lightweight porcelain granule manufactured by utilizing printing and dyeing sludge and manufacturing method thereof |
| CN102329123B (en) * | 2011-06-21 | 2013-04-03 | 东莞市保源达房地产开发有限公司 | Lightweight high-strength porcelain granule manufactured by utilizing printing and dyeing sludge and manufacturing method thereof |
| CN102329111B (en) * | 2011-06-21 | 2013-11-20 | 东莞市保源达房地产开发有限公司 | Lightweight brick manufactured by utilizing printing and dyeing sludge and manufacturing method thereof |
| CN102674800A (en) * | 2012-06-14 | 2012-09-19 | 中国科学院生态环境研究中心 | Method for producing porous support of biological film by matching wet sludge and construction waste |
| CN102863202B (en) * | 2012-09-24 | 2013-11-06 | 延安市俊峰新型墙材有限公司 | Method for preparing urban domestic sludge doped fired brick |
| CN106747293A (en) * | 2017-01-06 | 2017-05-31 | 柳州市正龙机械制造有限公司 | The wet mud brick-making method for directly being produced using urban wastewater treatment firm |
| CN106699125A (en) * | 2017-03-02 | 2017-05-24 | 陈炳响 | Sintered brick and preparation method thereof |
| CN107200555A (en) * | 2017-05-25 | 2017-09-26 | 柳州市正龙机械制造有限公司 | The wet mud and paper mill alkali recovery white slime that are directly produced using urban wastewater treatment firm coordinate the method for being provided commonly for brickmaking |
| CN108083770A (en) * | 2017-12-22 | 2018-05-29 | 柳州市正龙机械制造有限公司 | Directly the method with brickmaking is mixed using wet mud and paper white sludge |
| CN108794019A (en) * | 2018-06-28 | 2018-11-13 | 滨州市春华建材有限公司 | The formula and production method of fired brick are produced with high heating value sludge |
| CN111320421A (en) * | 2018-12-14 | 2020-06-23 | 杨延勇 | Method for preparing brick making material by using printing and dyeing sludge |
| CN109336554A (en) * | 2018-12-18 | 2019-02-15 | 上海市建筑科学研究院 | A kind of test simulation blank-making method using original state sludge baked brick |
| CN110903072B (en) * | 2019-07-11 | 2022-02-08 | 西北农林科技大学 | Method for making bricks by heavy metal sludge wet process |
| CN111499348A (en) * | 2020-04-17 | 2020-08-07 | 余姚市恒祥新型建材有限公司 | Production process of sintered brick |
| CN112341154A (en) * | 2020-11-16 | 2021-02-09 | 广东鼎信建材科技有限公司 | Solid waste pyrolytic waste residue sintered brick and preparation method thereof |
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2021
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