CN108033763A - A kind of method that low temperature synthetic sludge becomes high-intensity building materials - Google Patents
A kind of method that low temperature synthetic sludge becomes high-intensity building materials Download PDFInfo
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- CN108033763A CN108033763A CN201711325452.7A CN201711325452A CN108033763A CN 108033763 A CN108033763 A CN 108033763A CN 201711325452 A CN201711325452 A CN 201711325452A CN 108033763 A CN108033763 A CN 108033763A
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- sludge
- building materials
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- intensity
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B30/00—Compositions for artificial stone, not containing binders
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to a kind of method that low temperature synthetic sludge becomes high-intensity building materials, belong to field of solid waste treating technology.Sludge cake was first crushed into 100 mesh sieves, dries, then weighs sludge：Calcium additive：Water=50~85%：10~30%：5~20%, stir evenly, it is compressing under 5~40Mpa, at 120~220 DEG C after the demoulding, 3~24h is handled under 0.2~2.3MPa, is finally spontaneously dried, as high-intensity building materials, after testing, its mechanical property meets the national building materials strength criterion for non-bearing building block wall, available for Wall or floor tile, Footpath brick, construction material.The present invention realizes the purpose of production low energy consumption and product high-quality at the same time, effectively realizes that the efficient green of sludge recycles, will not cause secondary pollution and processing cost is lower, and technique is simple, and the strength of materials of synthesis is high, and utilization is wide.The sludge utilization rate of the present invention is high, dosage is big, has good economic and social benefit.
Description
Technical field
The present invention relates to a kind of method that low temperature synthetic sludge becomes high-intensity building materials.Belong to solid waste processing
Technical field.
Background technology
Solid sediment matter caused by sewage disposal process, it is by organic debris, microorganism, inorganic particle, glue
The extremely complex heterogeneous body of the compositions such as body.Sludge is broadly divided into two kinds, and one kind is river sludge, is municipal wastewater discharge institute
The sludge of generation is produced, is mixed with biomass, the heterogeneous body of sandstone composition；Another kind is the sludge that sewage treatment plant produces,
The heterogeneous body being made of organic debris, microorganism, inorganic particle, colloid etc..The key property of sludge is moisture content height,
High organic content, easily degenerates smelly, and particle is thinner, and proportion is smaller.Dewatered sludge moisture content usually 75%~
In the range of 90%, it is also necessary to be further processed and dispose, so that sludge stabilization, decrement and harmless.Treatment of Sludge and place
The process of putting influences whether its recycling.The purpose of sludge treatment is to make the harmless back to nature of sludge, and is reduced to ring
The approach such as the influence sludge treatments in border mainly include sanitary landfills, burning or desiccation collected manure, building materials utilize.Sludge sanitary landfills
Method is simple, and disposing sludge amount is big, is many common methods of country, but this method operating cost is higher, particularly dirt
Mud moisture content can influence the operating of landfill yard when higher.Sludge utilization ways are relatively more, mainly including land use, thermal energy
Utilized etc. using with building materials, but sludge is usually required to first pass through special treatment process and could utilized.At present, conduct is filled
Most common Treatment of Sludge mode, cost are higher；And in building materials use aspects, low energy consumption and product high-quality are to be difficult to while real
It is existing.
And in terms of making brick from sludge, general at present is prepared by the method for sintering, such as Chinese patent《It is a kind of new
Type making brick from sludge technique》(the patent No.：ZL201510091655.9) provide after one kind mixes sludge with clay and pass through sintering
The method for preparing construction material；Chinese patent《A kind of method using water treatment sludge brickmaking》(the patent No.：
ZL201610887779.2) provide it is a kind of over dry sludge and building waste ash, calcium phosphate, amino sulfide etc. are mixed after burn
The method that knot prepares construction material.These methods realize the recycling of sludge to a certain extent, but are made by sintering
Standby construction material, preparation process energy consumption is huge, and new pollution can be caused to environment.And Chinese patent《A kind of steam-pressing brisk production
Technique》(patent No. ZL201710424716.8) offer is a kind of to prepare unburned sludge brick using oil plant secondary settling tank activated sludge
Method, but the method materials have limitation, are only limitted to activated sludge；At the same time, it is necessary to be pre-processed to raw material, processing method
It is complicated；And the brickmaking cycle is up to one month, it is impossible to efficient process sludge.
The content of the invention
It is an object of the present invention to provide a kind of method that sludge is synthesized to the construction material with high intensity under low temperature.This hair
The bright method that sludge is synthesized to high-intensity building materials under cryogenic, it is not necessary to sinter, energy consumption is low, effectively realizes dirt
The resource reutilization of mud, while secondary pollution will not be caused to environment.
In order to achieve the above object, the present invention is carried out using following technique：
First the higher sludge of water content is reduced its water content, obtain block sludge cake, then by sludge cake by extruding
Sewage sludge powder is dried, mixed by mixing device by following mass percent to 100 mesh by crushing and grinding at 80 DEG C~120 DEG C
Close, sludge：Calcium additive：Water=50%~85%：10%~30%：5%~20% (the sum of the above components content should wait
In 100%), stir evenly, it is compressing under the pressure of 5~40MPa to obtain green compact, closed after green compact are demoulded by low temperature
Into：3~24h is handled at 120 DEG C~220 DEG C, it is block construction material product to be spontaneously dried after the completion of processing.The bulk is built
After building material after testing, its mechanical property meets the national building materials strength criterion for non-bearing building block wall；Product resists
Folding intensity can reach 20MPa~30MPa, can be applied to Wall or floor tile, Footpath brick, construction material.
One or more of the above-mentioned calcium additive in calcium hydroxide, lime stone, quick lime, dolomite are in any proportion
The calcium additive mixed.
Above-mentioned sludge is solid sediment matter caused by sewage disposal process, it is by organic debris, microorganism, nothing
The extremely complex heterogeneous body of the compositions such as machine particle, colloid, including the river sludge of municipal wastewater discharge and sewage treatment plant
The block sludge of generation.
It is an advantage of the invention that：
1, compared with existing making brick from sludge technology sludge utilization rate is no more than 15%, sludge utilization rate height (50- of the present invention
85%) and dosage is big, and the huge sludge of current production rate can be efficiently used, and effectively realize the resource reutilization of sludge.
2, using the method for low temperature synthesis construction material is made in sludge by the present invention, and energy consumption is low, and technological feasibility is high, and is closed
Into the strength of materials it is very high, available for wall brick, floor tile, Footpath brick etc., therefore realize low energy consumption and product high-quality at the same time
Purpose.
3, compared with existing making brick from sludge technology, present invention process is simple, and the especially pretreatment of sludge only needs to crush
And drying, therefore production cost is low, economic and social benefit is good, easily promotes and applies.
Brief description of the drawings：
Fig. 1 is the production technological process of the present invention.
Fig. 2 is the XRD curves of present invention sample obtained at a temperature of differential responses, from bottom to top reaction temperature point
Wei not be 120 DEG C, 140 DEG C, 160 DEG C, 180 DEG C, 200 DEG C.
Fig. 3 is the XRD curves of present invention sample obtained in the case of different watering quantities, from bottom to top watering quantity
Difference 5%, 10%, 15%, 20%, 25%.
Fig. 4 is the change that sample flexural strength is made in the present invention under the differential responses time.
Fig. 5 is the change that sample flexural strength is made in the present invention at a temperature of differential responses.
Fig. 6 is the SEM photograph of the obtained sample of the present invention.
Embodiment
The present invention is further illustrated below by embodiment.
Embodiment 1：
Using sludge, calcium additive and the water after grinding to 100 mesh as raw material, weigh by mass percentage 80% sludge,
15% calcium additive, 5% water, it is compressing under FW-4 tablet press machines to obtain green compact, sample after raw material is fully ground stirring
Shape is to be about the cuboid bulk of 40mm, width about 15mm, thickness about 5mm, briquetting pressure 20MPa；The green compact of forming are shifted
Into closed reactor, the water of certain volume is added in reaction kettle, specific additive amount is the 10% of reactor volume, is carried out afterwards
Heat, heating-up temperature is 200 DEG C, time 8h；Sample after the completion of processing, which takes out, is placed in 80 DEG C of baking ovens dry 24h
It can obtain product firming body.Utilize line-of-sight course to carry out flexural strength test, the results showed that sample flexural strength up to 28MPa,
Meet construction material strength demand.
Embodiment 2：
Using the sludge after grinding, calcium additive and water as raw material, 70% sludge, 20% calcareous is weighed by mass percentage
Additive, 10% water, after raw material is fully ground stirring, compressing under FW-4 tablet press machines to obtain green compact, sample shape is
It is block to be about 40mm, width about 15mm, the cuboid of thickness about 5mm, briquetting pressure 25MPa；The green compact of forming are transferred to closed
In reaction kettle, the water of certain volume is added in reaction kettle, specific additive amount is the 10% of reactor volume, is carried out afterwards at heating
Reason, heating-up temperature are 180 DEG C, time 10h；Sample after the completion of processing, which takes out, is placed in 80 DEG C of baking ovens dry 24h
Obtain product firming body.Flexural strength test is carried out using line-of-sight course, the results showed that sample flexural strength meets up to 25MPa
Construction material strength demand.
Embodiment 3：
Using the sludge after grinding, calcium additive and water as raw material, 75% sludge, 10% calcareous is weighed by mass percentage
Additive, 15% water, after raw material is fully ground stirring, compressing under FW-4 tablet press machines to obtain green compact, sample shape is
It is block to be about 40mm, width about 15mm, the cuboid of thickness about 5mm, briquetting pressure 20MPa；The green compact of forming are transferred to closed
In reaction kettle, the water of certain volume is added in reaction kettle, specific additive amount is the 10% of reactor volume, is carried out afterwards at heating
Reason, heating-up temperature are 160 DEG C, time 16h；Sample after the completion of processing, which takes out, is placed in 80 DEG C of baking ovens dry 24h
Obtain product firming body.Flexural strength test is carried out using line-of-sight course, the results showed that sample flexural strength meets up to 21MPa
Construction material strength demand.
Embodiment 4：
Using the sludge after grinding, calcium additive and water as raw material, 50% sludge, 30% calcareous is weighed by mass percentage
Additive, 20% water, after raw material is fully ground stirring, compressing under FW-4 tablet press machines to obtain green compact, sample shape is
It is block to be about 40mm, width about 15mm, the cuboid of thickness about 5mm, briquetting pressure 25MPa；The green compact of forming are transferred to closed
In reaction kettle, the water of certain volume is added in reaction kettle, specific additive amount is the 10% of reactor volume, is carried out afterwards at heating
Reason, heating-up temperature are 140 DEG C, time 20h；Sample after the completion of processing, which takes out, is placed in 80 DEG C of baking ovens dry 24h
Obtain product firming body.Flexural strength test is carried out using line-of-sight course, the results showed that sample flexural strength meets up to 17MPa
Construction material strength demand.
Embodiment 5：
Using the sludge after grinding, calcium additive and water as raw material, 60% sludge, 15% calcareous is weighed by mass percentage
Additive, 25% water, after raw material is fully ground stirring, compressing under FW-4 tablet press machines to obtain green compact, sample shape is
The cylinder of diameter about 50mm, thickness about 8mm are block, briquetting pressure 25MPa；The green compact of forming are transferred to closed reactor
In, the water of certain volume is added in reaction kettle, specific additive amount is the 10% of reactor volume, is heated afterwards, added
Hot temperature is 120 DEG C, time 24h；Sample taking-up after the completion of processing is placed in 80 DEG C of baking ovens dry 24h and can be produced
Product firming body.Sample flexural strength is measured up to 15MPa, meets construction material strength demand.
Above-mentioned sludge be sewage disposal after product, be one kind by organic debris, microorganism, inorganic particle, colloid etc.
The extremely complex heterogeneous body of composition, reduces the sludge cake obtained after its water content, including municipal wastewater through extrusion process
The block sludge that the river sludge of discharge and sewage treatment plant produce.Calcium additive is commercially available technical grade commodity, and water is originally
Water.
The method that a kind of low temperature synthetic sludge of the present invention becomes high-intensity building materials, its reaction principle is manual simulation's rock
The forming process of stone, under natural conditions the formation of rock belong to crystallization of the dissolution and precipitation process；And by this method, under production conditions
Accelerate crystallization of the dissolution and precipitation-precipitation of raw material so that the solubility of reaction raw materials greatly improves, and accelerates generation hydrated calcium silicate, and then
The consistency of sample is improved, so intensity is tentatively improved；With the progress of reaction, hydrated calcium silicate is converted into layer structure
Tobermorite, it is interleaved with each other together, is filled in raw material gap, the final of intensity is carried in threadiness or sheet
Height plays a crucial role.
Further illustrated below with the river sludge that is produced in the comprehensive harness of inland rivers engineering of Jiangxi Province Yueping City south, according to
The technological process of production shown in Fig. 1 makes to obtain high-intensity building materials.
At a temperature of obtaining differential responses by detection, the XRD curves of sample are made, please see Figure 2.Can be with from Fig. 2 curves
Find out there is obvious tobermorite peak between 7~8 degree, 29~30 degree of abscissa, and reaction temperature is higher, Tuo Bomo comes
Shi Feng is also more obvious, this is consistent with testing the sample strength measured.
In the case of different watering quantities (5%, 10%, 15%, 20%, 25%), the XRD curves of sample are made, please see Figure
3.Fig. 3 shows that the peak of tobermorite is lower afterwards as the increase of watering quantity first becomes higher, this is also consistent with experiment measured result.
Fig. 4 gives the flexural strength curve of sample made from the differential responses time, it can be seen from the figure that the reaction time
During within 24h, the reaction time is longer, and sample flexural strength is also higher；Between when reacted more than 24h after, intensity gradually tends to
Stablize.
Fig. 5 gives the flexural strength curve that sample is made in differential responses temperature, it can be seen from the figure that reaction temperature is got over
Height, the final strength of sample are also higher.
Fig. 6 gives the SEM photograph of sample, as we can clearly see from the figure laminated structure, and here it is raw in reaction process
Into tobermorite.
Claims (3)
1. a kind of method that low temperature synthetic sludge becomes high-intensity building materials, it is characterized in that：First by sludge cake crushing and grinding
To 100 mesh, dried at 80 DEG C~120 DEG C, then measure sludge according to material mass percentage：Calcium additive：Water=
50%~85%：10%~30%：5%~20%, stir evenly, it is compressing under the pressure of 5~40MPa, green compact are obtained,
In temperature it is 120 DEG C~220 DEG C after green compact are demoulded, high pressure low temperature handles 3~24h under steam pressure 0.2MPa~2.3MPa,
Finally spontaneously dry, be high intensity bulk construction material, after testing after, the mechanical property of the bulk construction material, which meets, to be used for
The national building materials strength criterion of non-bearing building block wall, can be applied to Wall or floor tile, Footpath brick, construction material.
2. the method that a kind of low temperature synthetic sludge according to claim 1 becomes high-intensity building materials, it is characterized in that：Institute
It is solid sediment matter caused by sewage disposal process to state sludge, it is by organic debris, microorganism, inorganic particle, glue
The extremely complex heterogeneous body of the compositions such as body, including the bulk that the river sludge of municipal wastewater discharge and sewage treatment plant produce
Sludge.
3. the method that a kind of low temperature synthetic sludge according to claim 1 becomes high-intensity building materials, it is characterized in that：Institute
State what one or more of the calcium additive in calcium hydroxide, lime stone, quick lime, dolomite mixed in any proportion
Commercially available technical grade commodity.
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| CN201711325452.7A CN108033763A (en) | 2017-12-13 | 2017-12-13 | A kind of method that low temperature synthetic sludge becomes high-intensity building materials |
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| CN201711325452.7A CN108033763A (en) | 2017-12-13 | 2017-12-13 | A kind of method that low temperature synthetic sludge becomes high-intensity building materials |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113831095A (en) * | 2021-09-27 | 2021-12-24 | 同济大学 | Method for preparing high-strength building material by using sludge and obtained high-strength building material |
| CN117602859A (en) * | 2023-10-10 | 2024-02-27 | 江苏集萃功能材料研究所有限公司 | Sludge building material treatment system and treatment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000061496A (en) * | 1998-08-21 | 2000-02-29 | Eko System:Kk | Sludge solidifying treatment |
| CN101012118A (en) * | 2007-02-06 | 2007-08-08 | 湖北大学 | Method of producing aerated concrete by sludge hydrolytic residue of wastewater treatment factory |
| CN101113090A (en) * | 2007-07-22 | 2008-01-30 | 罗健泉 | Method for producing baking-free brick without odour and three-waste by using sewage plant sludge |
| CN105418042A (en) * | 2015-11-17 | 2016-03-23 | 同济大学 | Method for utilizing paper mill sludge ash for preparing building material |
-
2017
- 2017-12-13 CN CN201711325452.7A patent/CN108033763A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000061496A (en) * | 1998-08-21 | 2000-02-29 | Eko System:Kk | Sludge solidifying treatment |
| CN101012118A (en) * | 2007-02-06 | 2007-08-08 | 湖北大学 | Method of producing aerated concrete by sludge hydrolytic residue of wastewater treatment factory |
| CN101113090A (en) * | 2007-07-22 | 2008-01-30 | 罗健泉 | Method for producing baking-free brick without odour and three-waste by using sewage plant sludge |
| CN105418042A (en) * | 2015-11-17 | 2016-03-23 | 同济大学 | Method for utilizing paper mill sludge ash for preparing building material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113831095A (en) * | 2021-09-27 | 2021-12-24 | 同济大学 | Method for preparing high-strength building material by using sludge and obtained high-strength building material |
| CN117602859A (en) * | 2023-10-10 | 2024-02-27 | 江苏集萃功能材料研究所有限公司 | Sludge building material treatment system and treatment method |
| CN117602859B (en) * | 2023-10-10 | 2024-04-23 | 江苏集萃功能材料研究所有限公司 | Sludge building material treatment system and treatment method |
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Application publication date: 20180515 |