CN110054476A - A method of haydite is prepared using domestic sludge cracking gas-producing sintering industrial sludge - Google Patents
A method of haydite is prepared using domestic sludge cracking gas-producing sintering industrial sludge Download PDFInfo
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- CN110054476A CN110054476A CN201910396475.XA CN201910396475A CN110054476A CN 110054476 A CN110054476 A CN 110054476A CN 201910396475 A CN201910396475 A CN 201910396475A CN 110054476 A CN110054476 A CN 110054476A
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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
- 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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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/135—Combustion residues, e.g. fly ash, incineration waste
- C04B33/1352—Fuel ashes, e.g. fly ash
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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
- C04B33/00—Clay-wares
- C04B33/32—Burning methods
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
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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
- 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
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Combustion & Propulsion (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of method for preparing haydite using domestic sludge cracking gas-producing sintering industrial sludge, steps are as follows: chooses the domestic sludge that sewage treatment plant's desiccation to moisture content is 20%-25% or so, calorific value is 1670-2000 kilocalorie and is used for solid waste medium temperature pyrolysis furnace cracking gas-producing；Raw material, auxiliary material after being subject to auxiliary material, are successively used roller pick breaker to mix with Double shaft stirring crusher machine by the industrial sludge using desiccation to moisture content for 65% ~ 70% as haydite materials, are then fed into Doubleroller compaction granulator or granulating disc production embryo material；Blank is fired using cracking gas as rotary kiln or setting kiln heat source；It is cooling with cooler after the completion of embryo material is fired.The dioxins concentration of cracking gas of the present invention is lower than GB1848.4-2001 " dangerous waste incineration contamination control standard " limit value, the Leaching of Heavy Metals concentration of made haydite is lower than GB5085.3-2007 " hazardous waste judging standard leaching characteristic identification " limit value, and environmental benefit, economic benefit and social benefit are prominent.
Description
Technical field
The present invention relates to the processing of solid hazardous waste and disposal technology field, and in particular to a kind of to utilize domestic sludge
The method that cracking gas-producing sintering industrial sludge prepares haydite.
Background technique
Industrial sludge refers to industrial wastewater after processing, and the dirty substance that institute's precipitation and separation comes out, different industry produces
Raw different industrial sludge.At present, main industrial sludge has electroplating sludge, steelmaking and ironmaking sludge, refining aluminium oxide sludge (red
Mud), oil field and oil plant oily sludge, paper mill sludge, printing and dyeing sludge, leather-making mud etc..Generally all contain in these industrial sludges
There are the heavy metals such as a large amount of pathogen, helminth, pathogenic microorganisms and arsenic, copper, chromium, mercury and dioxin, radioactive element etc.
It is difficult to the poisonous and harmful substance degraded, therefore, how scientifically disposal of commercial sludge becomes the key issues studied both at home and abroad.
Last century the eighties, the technology of firing ceramsite by using sludge is external increasingly mature.China is also at last century 90 years
Start to be studied to preparing haydite using sludge for initial stage.But make a general survey of Huizhou Lvrun Environmental Protection Technology Co., Ltd. Wang Jin
A kind of patent " light ceramic manufactured using municipal sludge and printing and dyeing sludge " (patent No. of army et al.
ZL201110127396.2), patent " a kind of method of preparing hadite from chemical sludge " (patent of Nanjing University of Technology Zhao Hao et al.
Number ZL201110150119.3), the patent of Shandong Light Ind College Du Yi et al., really can be the huge sum of money in sludge at haydite
Belong to sealing to get up, but is still increased using coal-fired, natural gas as the main source for firing heat in the sintering procedure of haydite
Heat source cost, and pollute environment.
" sludge prepares production as the haydite of fuel to the patent of Zhejiang Dadongwu Group Construction Co., Ltd. Lang Jianlei et al.
Line " (patent No. ZL201811387658.7) make public for the first time using sludge, biomass as prepare haydite fuel supply, this is
The primary innovation of ceramsite preparation process, but sludge fuel disclosed in the patent, biomass fuel need first after crushing
It can enter in rotary kiln, therefore both increased broken cost, enter rotary kiln burning simultaneously in broken sludge and biomass
When increase the investment of the complexity of gas and the complexity and cost of dedusting and tail gas clean-up again.
Pleasant et al. patent " solid waste medium temperature the pyrolysis oven " (patent No. of Zhengzhou Xin Di mechanical equipment Co., Ltd fourth
ZL201810578972.7 oxygen deprivation medium temperature pyrolysis technology) is used, realizes and will not add any components of biomass, moisture content is
25%, calorific value is the domestic sludge of 1670 kilocalories in oxygen deprivation, and in the environment of temperature is 500-650 degrees Celsius, being successfully cracked into can
Combustion gas body, and the dioxins concentration of fuel gas is far below GB 1848.4-2001 " dangerous waste incineration contamination control standard "
Limit value.
Therefore, domestic sludge medium temperature is cracked into combustible gas as heat source, then industrial sludge sintering is prepared into heavy metal
Haydite up to standard is leached, there is its special environmental benefit, economic benefit and social benefit.
Summary of the invention
For the development of current sludge treatment, domestic sludge cracking system is utilized the purpose of the present invention is to provide a kind of
The method that gas sintering industrial sludge prepares haydite.
The technical solution adopted by the present invention are as follows:
A method of haydite being prepared using domestic sludge cracking gas-producing sintering industrial sludge, is included the following steps:
Step 1: select sewage treatment plant's moisture content be 20%-25%, the domestic sludge that calorific value is 1670-2000 kilocalorie
It is sent into solid waste medium temperature pyrolysis oven and carries out cracking gas-producing；
Step 2: choosing raw material of the industrial sludge as haydite that sewage treatment plant's moisture content is 65%-70%, and with it is auxiliary
Material roller pick breaker and Double shaft stirring crusher machine are mixed and made into mixture；
Step 3: mixture obtained by step 2 is sent into Doubleroller compaction granulator or partial size is made as 1-2cm's in granulating disc
Embryo material；
Step 4: cracking gained combustible gas in step 1 is passed directly into rotary kiln as heat source or erects kiln, and will step
Obtained embryo material is sent into rotary kiln or erects kiln and roasted in rapid three.
Further, the roasting is divided into three phases:
First stage is preheating and drying section, and using steady heating, the mode to heat up slowly carries out preheating and drying to embryo material, controls embryo
The temperature for expecting inlet is 300 DEG C, then, is heated to 1000 DEG C with the rate of 13-18 DEG C/min；
Second stage is high temperature calcination section, and roasting required temperature is 1050-1200 DEG C, when firing a length of 45-65min；
Phase III is cooling section, and embryo material is taken out, and ceramic product can be obtained with cooler cooling.
Further, high heating value natural gas can be added in the cracking combustible gas.
Further, the auxiliary material is one of clay, shale, clay, red mud, furnace quarrel, mine quarrel and flyash or several
Kind.
Compared with prior art, the present invention has following four big advantages:
1, the present invention has innovated the preparation process of haydite, while mentioning again for the processing of domestic sludge and industrial sludge with disposition
New scheme is supplied.
2, the heat source that the present invention is roasted using domestic sludge cracking gas as haydite, instead of fire coal, the day in traditional handicraft
The heat sources supply such as right gas, biomass, has environmental benefit, economic benefit and social benefit.
3, using industrial sludge as the raw material for preparing haydite, the utilization efficiency of industrial sludge had not only been improved, but also had been realized pair
The leaching concentration of the stabilization sealing of heavy metal, haydite heavy metal is lower than national standard GB 5085.3-2007 " hazardous waste judging standard
Leaching characteristic identification " limit value, reach environmental requirement, not will cause secondary pollution.
4, the haydite obtained by the present invention has heat preservation, antidetonation, sound insulation, high intensity and other effects, can be used for building materials (room
The engineerings such as room, road, bridge and sponge urban construction), flame-proof thermal insulation material, gardening, the fields such as chemical industry and petroleum.
Specific embodiment
Below with reference to embodiment, the invention will be further described.
Domestic sludge used by embodiment is derived from locating for economic the second sewage treatment plant of comprehensive test region in Zhengzhou air harbor
Manage the sludge of discharge.
Embodiment 1:
Selection economic the second sewage treatment plant of the comprehensive test region moisture content in Zhengzhou air harbor is 25%, calorific value is 1670 kilocalories
Domestic sludge, be sent into solid waste medium temperature pyrolysis oven carry out cracking gas-producing；And it chooses aqueous after certain tannery's dehydration and drying
The leather-making mud that rate is 65%, is stirred according to the mass ratio of 5:3:2 with roller pick breaker and twin shaft with auxiliary material clay, flyash
Crusher machine mixing is mixed, and is sent into granulating disc and the embryo material that partial size is 1cm is made；Then blank is sent into and is made by cracking combustible gas
It is roasted for the rotary kiln of heat source, first using steady heating when roasting, the mode to heat up slowly carries out preheating and drying, control to embryo material
The temperature of embryo material inlet processed is 300 DEG C, and is heated to 1000 DEG C with the rate of 17 DEG C/min；After equal embryo materials are sufficiently dried, then
With 1200 DEG C of high-temperature roasting, firing time 55min；, can needed for if the calorific value of roasting cracking combustible gas used is not achieved
It is aided with the natural gas of high heating value；After the completion of equal firings, then embryo material taken out, it is cooling with cooler, and stack density and be
652kg/m3。
Embodiment 2:
Selection economic the second sewage treatment plant of the comprehensive test region moisture content in Zhengzhou air harbor is 25%, calorific value is 1670 kilocalories
Domestic sludge, be sent into solid waste medium temperature pyrolysis oven carry out cracking gas-producing；And it chooses aqueous after certain Leather Factory's dehydration and drying
The paper mill sludge that moisture content is 65% after leather sludge and certain paper mill dehydration and drying that rate is 65%, with auxiliary material clay, fine coal
Ash is mixed with roller pick breaker with Double shaft stirring crusher machine according to the mass percent of 42:14:24:20, and is sent into disk and is made
The embryo material that partial size is 1cm is made in grain machine；Then blank feeding is roasted by cracking combustible gas as the rotary kiln of heat source, is roasted
First using steady heating when burning, the mode to heat up slowly carries out preheating and drying to embryo material, and the temperature of control embryo material inlet is 300
DEG C, and 1000 DEG C are heated to the rate of 16 DEG C/min；After equal embryo materials are sufficiently dry, then 1200 DEG C of high-temperature roasting is used, firing
Time is 65min；If the natural gas of high heating value can be aided with needed for the calorific value of roasting cracking combustible gas used is not achieved；Deng burning
After the completion of system, then embryo material taken out, it is cooling with cooler, and stacking density is 613kg/m3。
The haydite for taking equivalent above-described embodiment to be produced, and its properties is measured, measurement result such as table 1
It is shown.
The measurement result of 1 haydite properties relevant parameter of table
| Serial number | Sintering temperature T (DEG C) | Bulk density (kg/m3) | Cylindrical compress strength (Mpa) | Water absorption rate (%) |
| Embodiment 1 | 1200 | 652 | 3.8 | 9.4 |
| Embodiment 2 | 1200 | 613 | 4.7 | 5.2 |
| GB/T 17431.1-2010 | —— | ≤700 | ≤3.0 | ≥10 |
According to measurement result, compareing GBT 17431.1-2010 " light-weight aggregate and its test method part 1: light-weight aggregate " can
Know, the haydite compression strength advantage that embodiment 1 and embodiment 2 are produced is prominent, and the water absorbing properties of embodiment 1 are better than real
Apply example 2.
The haydite produced in equivalent above-described embodiment is taken again, and the content of chromium in leachate is measured, and is measured
The results are shown in Table 2.
The measurement result of chromium content in 2 haydite leachate of table
| Project | Embodiment 1 | Embodiment 2 |
| Leaching content (mg/L) before being sintered | 620.1 | 21.9 |
| Leaching content (mg/L) after sintering | 6.53 | 0.03 |
| GB 5085.3-2007(mg/L) | ≤15 | ≤15 |
According to measurement result it is found that the ceramic product that above-described embodiment is produced, the leaching content of heavy metal chromium are lower than
GB5058.3-2007 " danger wastes judging standard-leaching characteristic identification " limit value, has achieved the effect that sealing heavy metal chromium,
It not will cause secondary pollution, can be used safely in production and living.
Above-described embodiment is described in detail, all according to all the changes and improvements made by the invention application range
Deng shall remain within the patent scope covered by the invention.
Claims (4)
1. a kind of method for preparing haydite using domestic sludge cracking gas-producing sintering industrial sludge, which is characterized in that including as follows
Step:
Step 1: the domestic sludge that sewage treatment plant's moisture content is 20%-25%, calorific value is 1670-2000 kilocalorie is selected to be sent into solid
Body waste medium temperature pyrolysis oven carries out cracking gas-producing；
Step 2: choosing raw material of the industrial sludge as haydite that sewage treatment plant's moisture content is 65%-70%, and with auxiliary material roller
Pick breaker and Double shaft stirring crusher machine are mixed and made into mixture；
Step 3: mixture obtained by step 2 is sent into Doubleroller compaction granulator or the embryo material that partial size is 1-2cm is made in granulating disc；
Step 4: as heat source rotary kiln or setting kiln will be passed directly by cracking gained combustible gas in step 1, and by step 3
In obtained embryo material be sent into rotary kiln or erect kiln and roasted.
2. a kind of method for preparing haydite using domestic sludge cracking gas-producing sintering industrial sludge according to claim 1,
It is characterized in that, the roasting is divided into three phases:
First stage is preheating and drying section, and using steady heating, the mode to heat up slowly carries out preheating and drying to embryo material, and control embryo material enters
Temperature at mouthful is 300 DEG C, then, is heated to 1000 DEG C with the rate of 13-18 DEG C/min；
Second stage is high temperature calcination section, and roasting required temperature is 1050-1200 DEG C, when firing a length of 45-65min；
Phase III is cooling section, and embryo material is taken out, and ceramic product can be obtained with cooler cooling.
3. a kind of method for preparing haydite using domestic sludge cracking gas-producing sintering industrial sludge according to claim 1,
It is characterized by: high heating value natural gas can be added in the cracking combustible gas.
4. a kind of method for preparing haydite using domestic sludge cracking gas-producing sintering industrial sludge according to claim 1,
It is characterized by: the auxiliary material is one or more of clay, shale, clay, red mud, furnace quarrel, mine quarrel and flyash.
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| CN201910396475.XA CN110054476A (en) | 2019-05-13 | 2019-05-13 | A method of haydite is prepared using domestic sludge cracking gas-producing sintering industrial sludge |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112745136A (en) * | 2021-01-13 | 2021-05-04 | 华中科技大学 | External heating type light sludge ceramsite firing method based on biomass micron fuel |
| CN115124211A (en) * | 2022-08-30 | 2022-09-30 | 中国科学院大学 | Method for stabilizing heavy metal in sludge thermochemical treatment and safely recycling sludge |
| CN115403402A (en) * | 2022-04-14 | 2022-11-29 | 正升环境科技股份有限公司 | Method for preparing ceramsite from oily sludge |
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| CN104310960A (en) * | 2014-10-08 | 2015-01-28 | 严亮 | Ceramsite prepared by utilizing building garbage and waste glass and preparation method of ceramsite |
| CN104818064A (en) * | 2015-05-07 | 2015-08-05 | 齐元峰 | Synchronous recycling method with high-calorific-value dangerous waste and municipal solid waste |
| CN106995306A (en) * | 2017-05-17 | 2017-08-01 | 云南大学 | A kind of method of utilization activated sludge baking ceramsite |
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2019
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| CN104310960A (en) * | 2014-10-08 | 2015-01-28 | 严亮 | Ceramsite prepared by utilizing building garbage and waste glass and preparation method of ceramsite |
| CN104818064A (en) * | 2015-05-07 | 2015-08-05 | 齐元峰 | Synchronous recycling method with high-calorific-value dangerous waste and municipal solid waste |
| CN106995306A (en) * | 2017-05-17 | 2017-08-01 | 云南大学 | A kind of method of utilization activated sludge baking ceramsite |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112745136A (en) * | 2021-01-13 | 2021-05-04 | 华中科技大学 | External heating type light sludge ceramsite firing method based on biomass micron fuel |
| CN115403402A (en) * | 2022-04-14 | 2022-11-29 | 正升环境科技股份有限公司 | Method for preparing ceramsite from oily sludge |
| CN115124211A (en) * | 2022-08-30 | 2022-09-30 | 中国科学院大学 | Method for stabilizing heavy metal in sludge thermochemical treatment and safely recycling sludge |
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