阅读说明：本技术 一种利用城市污泥和建筑垃圾制作烧结制作透水砖及其制作方法 (Water permeable brick manufactured by sintering municipal sludge and construction waste and manufacturing method thereof ) 是由 刘猛 孙凯 赵威 刘明浩 卓未龙 王志宏 王宇峰 于 2019-10-12 设计创作，主要内容包括：一种利用城市污泥和建筑垃圾制作烧结制作透水砖及其制作方法,属于新型建材技术领域。包括以下步骤：1)城市污泥干化预处理；2)建筑垃圾及页岩处理；3)陈化处理；4)挤压成型；5)砖坯烘干；6)高温焙烧成品。上述一种利用城市污泥和建筑垃圾制作烧结制作透水砖及其制作方法,原料来源广,原料简单,成本低廉,透水砖性能能够完全达到国家标准,城市污泥的加入一定程度上提高透水砖的孔隙率,合理的焙烧温度保留透水砖中孔隙的贯通率,制成的透水砖具有透水性好的效果。这一方面增强透水砖的性能,同时又可以对城市污泥和建筑垃圾进行资源化利用。(A water permeable brick manufactured by sintering municipal sludge and construction waste and a manufacturing method thereof belong to the technical field of novel building materials. The method comprises the following steps: 1) drying and pretreating municipal sludge; 2) treating construction waste and shale; 3) aging treatment; 4) extrusion molding; 5) drying the green bricks; 6) and (5) roasting the finished product at high temperature. According to the water permeable brick manufactured by sintering and manufactured by using the municipal sludge and the construction waste and the manufacturing method thereof, the raw material source is wide, the raw material is simple, the cost is low, the performance of the water permeable brick can completely reach the national standard, the addition of the municipal sludge improves the porosity of the water permeable brick to a certain extent, the through rate of the pores in the water permeable brick is kept at a reasonable roasting temperature, and the manufactured water permeable brick has an effect of good water permeability. On the one hand, the performance of the water permeable brick is enhanced, and simultaneously, the urban sludge and the construction waste can be recycled.)

1. a water permeable brick manufactured by sintering municipal sludge and construction waste is characterized by being prepared from the following substances in parts by weight: 10-20 parts of municipal sludge, 40-60 parts of shale and 30-40 parts of construction waste.

2. The method for manufacturing the water permeable brick by sintering the municipal sludge and the construction waste according to claim 1, wherein the method comprises the following steps: 12-18 parts of municipal sludge, 45-55 parts of shale and 32-38 parts of construction waste.

3. The method for manufacturing the water permeable brick by sintering the municipal sludge and the construction waste according to claim 1, wherein the method comprises the following steps: 15-16 parts of municipal sludge, 50-52 parts of shale and 35-36 parts of construction waste.

4. The method for manufacturing the water permeable brick by sintering the municipal sludge and the construction waste according to claim 1, which comprises the following steps:

1) Drying and pretreating urban sludge: drying the municipal sludge until the water content is 30-40%;

2) Treating construction waste and shale: firstly, preliminarily mixing and crushing the construction waste and the shale, and then further crushing, uniformly mixing and grinding the mixture to 60-80 meshes;

3) aging treatment: adding 10-15 parts of water into 10-20 parts of municipal sludge, 40-60 parts of shale and 30-40 parts of construction waste treated in the steps 1) and 2), fully mixing, and aging the mixed material for 24-36 h;

4) extrusion molding: the aged mixture is sent into a vacuum brick extruding machine to be pressed into a blank, and the forming extrusion pressure is 15-25 Mpa;

5) Drying the green bricks: sending the formed green bricks into a drying kiln for drying, wherein the drying time of the green bricks is 25-35h, the drying temperature is 170-180 ℃, and the moisture content of the dried green bricks is 5-8%;

6) and (3) high-temperature roasting of a finished product: the dried green bricks are sent to a roasting kiln for high-temperature roasting, the temperature of the temperature rising section of the roasting kiln rises to the maximum temperature of 800-; the temperature of the high-temperature section is 800-; and (5) preparing a finished product brick.

5. The method for manufacturing the water permeable brick by using the municipal sludge and the construction waste for sintering according to claim 4, wherein the step 1) comprises the following steps: drying the municipal sludge until the water content is 34-36%; the municipal sludge is municipal sludge or industrial sludge, and the construction waste is waste bricks, waste stone blocks or waste water sludge blocks.

6. The method for manufacturing the water permeable brick by using the municipal sludge and the construction waste for sintering according to claim 4, wherein the step 2) comprises the following steps: the construction waste and the shale are crushed, mixed evenly and ground to 70 meshes.

7. The method for manufacturing the water permeable brick by using the municipal sludge and the construction waste for sintering according to claim 4, wherein the step 3) comprises the following steps: the aging time of the mixture is 28-35h, preferably 30-32 h.

8. The method for manufacturing the water permeable brick by using the municipal sludge and the construction waste for sintering according to claim 4, wherein the step 4) comprises the following steps: the molding extrusion pressure is 18 to 23MPa, preferably 20 to 22 MPa.

9. The method for manufacturing the water permeable brick by using the municipal sludge and the construction waste for sintering according to claim 4, wherein the step 5) comprises the following steps: the green brick drying time is 28-32h, preferably 30-31 h; the drying temperature is 175 ℃ and 178 ℃, and the water content of the dried green brick is 6-7%.

10. The method for manufacturing the water permeable brick by using the municipal sludge and the construction waste for sintering according to claim 4, wherein the step 6) comprises: the maximum temperature is 850 ℃, and the retention time is 15 h; the temperature of the high-temperature section is 830-850 ℃, the residence time of the high-temperature section is 10h, and the temperature is reduced to 300-800 ℃ for the residence time 17 h.

Technical Field

The invention belongs to the technical field of novel building materials, and particularly relates to a water permeable brick manufactured by sintering municipal sludge and building garbage and a manufacturing method thereof.

Background

with the proposal of the principle of 'solid waste can not be discharged from county and dangerous waste can not be discharged from city' about the disposal of general solid waste, higher disposal requirements are put forward on the general solid waste of cities including sludge, so that the general solid waste of the cities including sludge becomes a great obstacle for the development of the cities and the appearance display of the cities.

Municipal sludge mainly comprises municipal sludge and industrial sludge, the municipal sludge is mainly generated from biochemical reaction tanks and sedimentation tanks of urban sewage treatment plants and tap water plants, and the biochemical reaction tanks of the sewage treatment plants account for most of the municipal sludge, so that the municipal sludge generally contains a large amount of pathogens, residual degradable pollutants, persistent organic pollutants, heavy metals and other pollutants; the industrial sludge is mainly from sludge generated by wastewater treatment in industrial enterprises, and the components of the industrial sludge in different industries are complex; the municipal sludge is properly treated and recycled, so that the negative effects of the municipal sludge on human bodies and the surrounding environment can be greatly prevented, and meanwhile, the municipal sludge can be utilized as wastes, so that the resources are saved.

at present, the sludge disposal methods mainly comprise the methods of sanitary landfill, incineration, composting, building material utilization and the like. The sanitary landfill has the advantages of simple flow and quick disposal, but the utilization of the mode is greatly restricted by the characteristics of large land resource occupation, high environmental pollution risk of percolate and harmful gas and the like, and the sanitary landfill is only an isolation mode and is not a terminal disposal mode.

The incineration process of the municipal sludge can fully utilize the heat value in the sludge, the reduction degree is high, but the sludge cannot be incinerated independently, auxiliary materials need to be added, pollutants such as dioxin, fly ash and the like are easy to generate, the treatment cost of the dioxin is high, the fly ash and furnace slag need to be further treated, and the operation cost is increased.

The urban sludge composting is a treatment mode for stabilizing and reducing sludge in sludge treatment, degrades organic matters in sludge in an aerobic or anaerobic mode, has the characteristics of low cost and simple process, but has the embarrassment that the odor is difficult to treat and the treated product is difficult to sell.

The urban sludge is recycled for building material manufacture, the composition components can be fully utilized, the organic components provide part of heat value required by roasting, the inorganic components finally become part of the product, and the product can reach the corresponding standard.

The novel building materials are prepared by building material utilization, which is a relatively proper terminal disposal mode for disposing municipal sludge. For example, in patent publication No. CN107698273A, clay is included in the raw material, which is greatly limited from the viewpoint of protecting land resources.

Along with the acceleration of urban construction process, urban construction waste does not have proper treatment mode, mainly carries out landfill treatment at present, and its digestion capacity is obvious not enough, and building waste piles up serious influence the city appearance, occupies a large amount of soil, easily produces raise dust etc. simultaneously, influences city living environment.

disclosure of Invention

aiming at the problems in the prior art, the invention aims to design and provide a technical scheme for manufacturing water permeable bricks by sintering municipal sludge and construction waste and a manufacturing method thereof.

The water permeable brick manufactured by sintering and using the municipal sludge and the construction waste is characterized by being prepared from the following substances in parts by weight: 10-20 parts of municipal sludge, 40-60 parts of shale and 30-40 parts of construction waste.

the water permeable brick manufactured by sintering and using the municipal sludge and the construction waste is characterized in that: 12-18 parts of municipal sludge, 45-55 parts of shale and 32-38 parts of construction waste.

the water permeable brick manufactured by sintering and using the municipal sludge and the construction waste is characterized in that: 15-16 parts of municipal sludge, 50-52 parts of shale and 35-36 parts of construction waste.

the manufacturing method for manufacturing the water permeable brick by sintering and using the municipal sludge and the construction waste is characterized by comprising the following steps:

1) drying and pretreating urban sludge: drying the municipal sludge until the water content is 30-40%;

2) Treating construction waste and shale: firstly, preliminarily mixing and crushing the construction waste and the shale, and then further crushing, uniformly mixing and grinding the mixture to 60-80 meshes;

3) Aging treatment: adding 10-15 parts of water into 10-20 parts of municipal sludge, 40-60 parts of shale and 30-40 parts of construction waste treated in the steps 1) and 2), fully mixing, and aging the mixed material for 24-36 h;

4) Extrusion molding: the aged mixture is sent into a vacuum brick extruding machine to be pressed into a blank, and the forming extrusion pressure is 15-25 Mpa;

5) drying the green bricks: sending the formed green bricks into a drying kiln for drying, wherein the drying time of the green bricks is 25-35h, the drying temperature is 170-180 ℃, and the moisture content of the dried green bricks is 5-8%;

6) and (3) high-temperature roasting of a finished product: the dried green bricks are sent to a roasting kiln for high-temperature roasting, the temperature of the temperature rising section of the roasting kiln rises to the maximum temperature of 800-; the temperature of the high-temperature section is 800-; and (5) preparing a finished product brick.

The manufacturing method for manufacturing the water permeable brick by sintering and using the municipal sludge and the construction waste is characterized in that the method comprises the following steps of 1): drying the municipal sludge until the water content is 34-36%; the municipal sludge is municipal sludge or industrial sludge, and the municipal sludge refers to a common solid waste part and does not belong to dangerous waste; the construction waste is waste bricks, waste stone blocks or waste water mud blocks.

The manufacturing method for manufacturing the water permeable brick by sintering and using the municipal sludge and the construction waste is characterized in that the step 2) is as follows: the construction waste and the shale are crushed, mixed evenly and ground to 70 meshes.

the manufacturing method for manufacturing the water permeable brick by sintering and using the municipal sludge and the construction waste is characterized in that in the step 3): the aging time of the mixture is 28-35h, preferably 30-32 h.

The manufacturing method for manufacturing the water permeable brick by sintering and using the municipal sludge and the construction waste is characterized in that in the step 4): the molding extrusion pressure is 18 to 23MPa, preferably 20 to 22 MPa.

The manufacturing method for manufacturing the water permeable brick by sintering and using the municipal sludge and the construction waste is characterized in that in the step 5): the green brick drying time is 28-32h, preferably 30-31 h; the drying temperature is 175 ℃ and 178 ℃, and the water content of the dried green brick is 6-7%.

the manufacturing method for manufacturing the water permeable brick by sintering and using the municipal sludge and the construction waste is characterized in that in the step 6): the maximum temperature is 800-; the temperature of the high-temperature section is 850 ℃ and 870 ℃, the residence time of the high-temperature section is 10 hours, and the residence time of the temperature reduction section is 300 ℃ and 800 ℃ is 17 hours.

The water permeable brick adopts the municipal sludge which is difficult to dispose as a foaming agent, the construction waste as aggregate and the shale and the municipal sludge as an adhesive.

According to the water permeable brick manufactured by sintering and manufactured by using the municipal sludge and the construction waste and the manufacturing method thereof, the raw material source is wide, the raw material is simple, the cost is low, the performance of the water permeable brick can completely reach the national standard, the addition of the municipal sludge improves the porosity of the water permeable brick to a certain extent, the through rate of the pores in the water permeable brick is kept at a reasonable roasting temperature, and the manufactured water permeable brick has an effect of good water permeability. On the one hand, the performance of the water permeable brick is enhanced, and simultaneously, the urban sludge and the construction waste can be recycled.

Detailed Description

The following examples are given to illustrate the present invention but are not intended to limit the scope of the present invention.