CN104591693B - The method that the mud utilizing MNT to produce makes haydite - Google Patents
The method that the mud utilizing MNT to produce makes haydite Download PDFInfo
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- CN104591693B CN104591693B CN201510049339.5A CN201510049339A CN104591693B CN 104591693 B CN104591693 B CN 104591693B CN 201510049339 A CN201510049339 A CN 201510049339A CN 104591693 B CN104591693 B CN 104591693B
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- haydite
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- mud
- rotary kiln
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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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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of method that mud utilizing MNT to produce makes haydite, belong to useless innoxious, the recycle utilization of resource of solid danger.The present invention takes MNT production mud, municipal sludge and bentonite by weight and carries out wheel rolling, stirring, and it is allowed to mix homogeneously, mixture is put in specific environment and carry out extruder grain after fermentation, make haydite blank, then drying haydite, high-temperature roasting, blank sintering grow becomes haydite, being cooled to room temperature, the preferred bran coat of rotary kiln is fuel.The haydite that the present invention produces meets country's light-weight aggregate construction material standard-required, not only have effectively achieved the sewage sludge harmlessness disposing produced in MNT production process, also municipal sludge is made to get utilization, discharge is control effectively by whole process, do not produce secondary pollution, it is achieved that economic benefit and social benefit synchronize to improve.
Description
Technical field
The invention discloses a kind of method that mud utilizing MNT to produce makes haydite, belong to the useless nothing of solid danger
Evilization, the recycle utilization of resource.
Background technology
Recently as improving constantly of our people's living standard and process of industrialization, the material consumption amount of entire society
Strengthening rapidly, the thing followed is the generation of a large amount of garbage and thereby results in the harm to environment.According to statistics, the whole world is every
Year produce about more than 400,000,000 ton danger wastes, wherein the industry and mining such as chemical industry, metallurgy, printing and dyeing be danger wastes produce main
Source.Health and environment not only can be caused serious harm by the improper disposal of danger wastes, also can cause subsoil water,
The pollution of table water and soil earth, therefore danger wastes is that the world today faces one of the most thorny environmental problem.
In danger wastes with trade waste at most, mainly industrial solid castoff.Chemical enterprise is economic society
Make a great contribution, but the environmental problem that in chemical process, the refuse of generation brings increasingly causes the height weight of people
Depending on.
In relevant chemical enterprise factory waste water mainly have MNT and neighbour// para-totuidine production process produce waste water,
Equipment and ground flushing water, spent acid device vacuum pump draining, exhaust-gas treatment water, early-stage rainwater and sanitary wastewater etc., and single nitro
In toluene production process produce waste water through " acid out pretreatment+ferrum carbon reduction+Fenton oxidation+coagulating sedimentation " process after with other
Waste water mixing carries out biochemical treatment.Thus form " materialized mud that MNT production process produces and composite waste biochemistry
The mud that mud filter pressing in the lump produces ".The waste water produced in MNT production process, belongs to " National Hazard refuse register "
(2008) waste liquid produced in HW06 " organic solvent refuse " 261-001-06 " Nitrobenzol-aniline " production process.According to " about
The industry production waste water physicochemicals such as chemical industry process writing a letter in reply of mud attribute judgement " (ring does letter [2014] 1549) requirement, its materialization
" hazardous waste materializing strategy in other refuse of HW49 class in the mud produced in processing procedure applicable " National Hazard refuse register "
During useless water treatment sludge and residue ".Therefore the waste water thing produced in this type of chemical enterprise MNT production process
The mixing sludge changing mud and mixing biochemical sludge belongs to hazardous waste (HW49,802-006-49).This mud must be according to danger
Danger waste management requires to be disposed.
The disposal technology of the most existing multiple hazardous waste, such as high temperature incineration, (Rotation error, pyrolysis are burnt
Burn stove, grate furnace etc.), sanitary landfills, chemical disinfection, electromagnetic wave sterilizing etc..These disposal technologies in addition to high temperature incineration all or many
Or come with some shortcomings less, as sanitary landfills exists bigger future trouble, harmful substance easily leaks and causes secondary environmental pollution etc.；Change
Learning sterilization and can not process VOC, chemical agent etc., Disinfection Effect is difficult to ensure that, and the toxic waste liquid produced holds
Easily cause secondary pollution.In the treatment technology of various hazardous wastes, what the most only incineration treatment technology can be maximum
Degree and permanent destruction, decomposition of dangerous refuse the most great volume reduction loss of weight so that pollutant are focused on, thus
Preferably control secondary pollution.Burning method can realize minimizing, innoxious and money because of it when processing danger wastes simultaneously
Source is it is considered to be the method for maximally effective process hazardous waste.
Burning method processes hazardous waste and has been widely used in developed countries such as America and Europes.The eighties in 20th century, beautiful
State has carried out the work of knowing the real situation of substantial amounts of research work and incinerator.2004, the dangerous waste incineration device that the U.S. has used
Having 276, wherein utilize what rotary kiln disposed to have 75 more than, quite a few is light-weight aggregate rotary kiln.China's hazardous waste
Disposing task is at the early-stage, and dangerous waste disposal mainly has burning and landfill two ways.Burning method is processing dangerous giving up because of it
Minimizing, innoxious and resource can be realized it is considered to be the method for maximally effective process danger wastes during gurry simultaneously,
Ye Shi China danger wastes focuses on the method that center main is to be used.Through domestic and international technical research in the past few years and domestic
Technological demonstration, relevant government department establishes use technology using rotary kiln as in China from now on dangerous waste disposal main
Technology path.
Along with the propelling of Urbanization in China, the handling problems of municipal sewage plant's municipal sludge is as an environmental protection
A difficult problem is put before decision-making level.Sewage treatment plant's municipal sludge is the inevitable outcome of municipal sewage treatment, and it have accumulated city
The pollutant such as the heavy metal cannot cleared up in sewage disposal process, the most also comprise substantial amounts of pathogen, microorganism etc.;If no
Carry out appropriate process to dispose, secondary pollution will be formed, environment is done a lot of damage.Therefore, open up a new mud
Recycling approach is extremely urgent.
In the industrial production, use turning circle cylindrical apparatus that material carries out the processed such as machinery, physics and chemistry
Equipment is referred to as rotary kiln (being commonly called as rotary kiln).Rotary kiln has obtained the generation such as very big application, the U.S., European Union, Japan in terms of environmental protection
In boundary, the country of some prosperities has started to use rotary kiln process industry, domestic refuse and be harmful to as far back as 20 century 70s
Garbage etc..The ground such as Beijing and Shanghai in 1988 start with rotary kiln incineration danger wastes etc., from this China in terms of environmental protection
Start use rotary kiln and process garbage and rubbish.A lot of enterprises rotary kiln is had to produce haydite both at home and abroad.
Haydite is a kind of lightweight and the manufactured particles's shape material having some strength, can be used for producing light aggregate concrete, mixing
Solidifying earth building blocks and other materials for walls, employ the concrete of haydite and materials for wall can significantly reduce the appearance of concrete
Weight, improves the thermal and insulating performance of building, the energy consumption of building is greatly lowered.As the light-duty granule of a kind of ceramic, pottery
Grain appearance the feature rounded or oval-shaped ball of major part, its shape is different because technique is different, surface be one layer hard
Shell, has water proof, protects gas effect, thus have higher intensity.Haydite is due to internal porous, therefore has good thermal insulation separation
Hot property.Reduce discharging owing to China pushes forward building energy conservation comprehensively, protect environment, improve building function, therefore haydite is widely used in
Building trade is used for replacing the materials such as rubble.The production method of haydite mainly has baking-free type and slug type.Slug type produces haydite
Hazardous waste can be processed and building material produces and ideally combines, it may be that Future Development important directions.
Research shows, the haydite blank chemical composition with highly expanded performance should be: SiO2:Al2O3:(CaO+MgO+
Fe2O3+Na2O+K2O)=(48-79):(10-25):(13-26).By MNT is produced mud, municipal sludge and swollen
The chemical constitution study analysis of profit soil, the present invention has determined therefrom that three kinds of raw-material weight ratios of haydite material, in this range,
Under the conditions of rotary kiln baking, all can produce qualified haydite.
There is lot of documents both at home and abroad to utilizing mud production haydite to study, and the patent of this respect is the most increasingly
Many, but utilize MNT to produce mud, municipal sludge and the method for bentonite baking ceramsite, a most still blank.
Summary of the invention
In order to solve problems of the prior art, the invention provides a kind of mud utilizing MNT to produce
The method making haydite, adopts and can not only produce the haydite with extensive use in this way, and be even more important,
Effectively can also dispose hazardous waste for some chemical enterprises to find a way out.The present invention abandons production haydite to resources such as clays
The dependence of type raw material, produces mud using MNT and municipal sludge comprehensively utilizes as important source material, really realize
" turning waste into wealth " is green produces purpose, embodies energy-saving and emission-reduction, recycling economy development characteristic, have important society, environment,
Economic implications.
The method that the mud utilizing MNT to produce provided by the present invention makes haydite, comprises the following steps:
The first step, raw material preparation: (1) MNT produces mud, it is to be produced by MNT production process
Waste water mixes with other waste water after materializing strategy and carries out biochemical treatment and formed, and moisture content is 60%-70%；
(2) municipal sludge, urban wastewater treatment firm the primary sludge processing sewage generation is formed, and moisture content is at 75%-
85%；
(3) bentonite, with montmorillonite as Main Ingredients and Appearance, standby after drying and other treatment, containing water management below 5%；
Second step, wheel is rolled over and is mixed: above-mentioned raw materials carries out proportioning by weight, takes MNT and produces mud 5-10%, city
Political affairs mud 10-40% and bentonite 50-80%, carries out wheel and rolles over, stirs, make them uniformly mix；
3rd step, stacks fermentation: stacked 1-2 days in room by mixed uniformly raw material, makes they internal organic substances become
Part is fermented, then uses mixing plant mix and blend, is allowed to the loosest, keeps temperature humidity uniform；
4th step, to roller pelletize: use twin rollers that the material that the 3rd step is formed carries out extruder grain, forms particle diameter and exists
The haydite blank of 5mm-15mm；
5th step, revolution heating: heated in qualified haydite blank feeding rotary kiln by blank transmission equipment, return
Rotary kiln divides two sections, and epimere is little kiln, and topmost portion claims kiln hood, and hypomere is Dayao, and lowermost part is kiln tail, and haydite blank is from kiln hood
Enter, dried by gradient-heated；
The haydite blank being oven-dried continues to roll to kiln tail and enter rotary kiln Dayao and carry out high-temperature roasting；
6th step, natural cooling: the haydite after high-temperature roasting, from kiln tail kiln discharge, cools down at ambient temperature, thus makes
For completing.
More optimizedly, the bran coat of the fuel used preferred rice factory of rotary kiln, it is worn into powdery, with aerator from kiln tail spirt
Rotary kiln is lighted.
More optimizedly, tail gas produced by rotary kiln, by semidry method flue gas ash removal method, again with at bag-ty pe dust collection
Reason, so that it is guaranteed that it is up to standard to discharge gas.
The haydite purposes that the present invention produces is wide: preparation light aggregate concrete；Produce light block；For producing Light trabs；With
In roof insulation, look for slope；For flooring bed course, damp-proof layer；Afforest for balcony garden；For pot flowers, the nothing of gardening
Soil cultivation；For sewage disposal etc..This haydite is a kind of novel ecological environment-friendly products, is that a kind of applicating energy-saving reduces discharging and circulation
The high-tech product of Economic concept.
Used by this, two kinds of mud do not have cost, produce on the contrary, relevant mud produces business unit's haydite to be paid
The solidification disposal of waste expense that enterprise is certain.Bentonite used is derived mainly from some bentonite ores quarrel, and required expense is also the lowest
Honest and clean.All raw material is all readily obtained.The present invention does not has new waste liquid and solid waste to produce, and fragmentary waste gas also completes to reach row up to standard
Put.And using the secondary factory product bran coat of grain processing enterprises and institutions, it is achieved energy-conservation purpose, the organic matter in mud has phase simultaneously
When calorific value, it has certain combustion-supporting effect, thus also achieves energy-conservation target.So the present invention is that a raw material is easy
, economic worth is high, and energy-conserving and environment-protective are good, the good method of refuse reclamation.
Detailed description of the invention
It is described in detail below in conjunction with the preferred embodiments of the present invention, so that advantages and features of the invention can be easier to
It is readily appreciated by one skilled in the art, thus protection scope of the present invention is made apparent clear and definite defining.
The method that the mud utilizing MNT to produce provided by the present invention makes haydite, comprises the following steps:
The first step, raw material preparation: (1) MNT produces mud, it is to be produced by MNT production process
Waste water mixes with other waste water after materializing strategy and carries out biochemical treatment and formed, and moisture content is 60%-70%；
(2) municipal sludge, urban wastewater treatment firm the primary sludge processing sewage generation is formed, and moisture content is at 75%-
85%；
(3) bentonite, with montmorillonite as Main Ingredients and Appearance, standby after drying and other treatment, containing water management below 5%；
Second step, wheel is rolled over and is mixed: above-mentioned raw materials carries out proportioning by weight, takes MNT and produces mud 5-10%, city
Political affairs mud 10-40% and bentonite 50-80%, carries out wheel and rolles over, stirs, make them uniformly mix；
3rd step, stacks fermentation: stacked 1-2 days in room by mixed uniformly raw material, makes they internal organic substances become
Part is fermented, then uses mixing plant mix and blend, is allowed to the loosest, keeps temperature humidity uniform；
4th step, to roller pelletize: use twin rollers that the material that the 3rd step is formed carries out extruder grain, forms particle diameter and exists
The haydite blank of 5mm-15mm；
5th step, revolution heating: heated in qualified haydite blank feeding rotary kiln by blank transmission equipment, return
Rotary kiln divides two sections, and epimere is little kiln, and topmost portion claims kiln hood, and hypomere is Dayao, and lowermost part is kiln tail, and haydite blank is from kiln hood
Enter, dried by gradient-heated；
The haydite blank being oven-dried continues to roll to kiln tail and enter rotary kiln Dayao and carry out high-temperature roasting；
6th step, natural cooling: the haydite after high-temperature roasting, from kiln tail kiln discharge, cools down at ambient temperature, thus makes
For completing.
The bran coat of the fuel used preferred rice factory of rotary kiln, wears into powdery by it, with aerator from kiln tail spirt rotary kiln point
Combustion.
Tail gas produced by rotary kiln, by semidry method flue gas ash removal method, processes with bag-ty pe dust collection again, so that it is guaranteed that
Discharge gas is up to standard.
Claims (1)
1. the mud that one kind utilizes MNT to produce makes the method for haydite, it is characterised in that comprise the following steps:
The first step, raw material preparation: (1) MNT produces mud, it is by producing waste water in MNT production process
Mixing with other waste water after materializing strategy and carry out biochemical treatment and formed, moisture content is 60%-70%；
(2) municipal sludge, urban wastewater treatment firm the primary sludge processing sewage generation is formed, and moisture content is at 75%-85%；
(3) bentonite, with montmorillonite as Main Ingredients and Appearance, standby after drying and other treatment, containing water management below 5%；
Second step, wheel is rolled over and is mixed: above-mentioned raw materials carries out proportioning by weight, takes MNT and produces mud 10%, municipal sludge
40% and bentonite 50%, carry out wheel roll over, stirring, make them uniformly mix；
3rd step, stacks fermentation: stacked 1-2 days in room by mixed uniformly raw material, makes they internal organic substance compositions enter
Row fermentation, then use mixing plant mix and blend, it is allowed to the loosest, keeps temperature humidity uniform；
4th step, to roller pelletize: use twin rollers that the material that the 3rd step is formed carries out extruder grain, forms particle diameter at 5mm-
The haydite blank of 15mm；
5th step, revolution heating: heated in qualified haydite blank feeding rotary kiln by blank transmission equipment, rotary kiln
The fuel used bran coat for rice factory, wears into powdery by it, lights from kiln tail spirt rotary kiln with aerator, and rotary kiln divides two sections,
Epimere is little kiln, and topmost portion claims kiln hood, and hypomere is Dayao, and lowermost part is kiln tail, and haydite blank enters from kiln hood, by gradient
Heating, drying；
The haydite blank being oven-dried continues to roll to kiln tail and enter rotary kiln Dayao and carry out high-temperature roasting；
Tail gas produced by rotary kiln, by semidry method flue gas ash removal method, processes with bag-ty pe dust collection again, so that it is guaranteed that discharge
Gas is up to standard；
6th step, natural cooling: the haydite after high-temperature roasting, from kiln tail kiln discharge, cools down at ambient temperature, thus prepared
Become.
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| CN201510049339.5A CN104591693B (en) | 2015-01-31 | 2015-01-31 | The method that the mud utilizing MNT to produce makes haydite |
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| CN201510049339.5A CN104591693B (en) | 2015-01-31 | 2015-01-31 | The method that the mud utilizing MNT to produce makes haydite |
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| CN104591693B true CN104591693B (en) | 2016-09-28 |
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Families Citing this family (4)
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| CN105948706B (en) * | 2016-04-22 | 2018-05-29 | 浙江大学 | A kind of preparation method and its usage of the sludge ceramsite as potting soil filler |
| CN106560461A (en) * | 2016-05-17 | 2017-04-12 | 中科鼎实环境工程有限公司 | Repairing and resourceful treatment method of contaminated soil |
| CN106365606A (en) * | 2016-08-28 | 2017-02-01 | 梁乔保 | Light building material |
| CN113651588B (en) * | 2021-07-21 | 2022-09-13 | 湖南省环境保护科学研究院 | Efficient phosphorus-removing baking-free ceramsite and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173746A (en) * | 2010-12-29 | 2011-09-07 | 金坛市博大陶粒制品有限公司 | Method for baking ceramsite by using town sludge, river mud and bentonite |
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- 2015-01-31 CN CN201510049339.5A patent/CN104591693B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173746A (en) * | 2010-12-29 | 2011-09-07 | 金坛市博大陶粒制品有限公司 | Method for baking ceramsite by using town sludge, river mud and bentonite |
Non-Patent Citations (1)
| Title |
|---|
| 由化工脱水污泥烧制陶粒;刘景明 等;《北京科技大学学报》;20081031;第30卷(第10期);第1090-1094页 * |
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