CN104591694A - Harmless utilization method for sludge produced by mononitrotoluene - Google Patents
Harmless utilization method for sludge produced by mononitrotoluene Download PDFInfo
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- CN104591694A CN104591694A CN201510049387.4A CN201510049387A CN104591694A CN 104591694 A CN104591694 A CN 104591694A CN 201510049387 A CN201510049387 A CN 201510049387A CN 104591694 A CN104591694 A CN 104591694A
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- kiln
- haydite
- mnt
- 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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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
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- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a harmless utilization method for sludge produced by mononitrotoluene, belonging to a harmless and recycling cyclic utilization technology of solid hazardous waste. The harmless utilization method comprises the following steps: weighing the sludge produced by mononitrotoluene, bentonite or bentonite tailings by weight, grinding, stirring and uniformly mixing to obtain a mixture, putting the mixture into a special environment to extrude and pelletize after fermentation to prepare a ceramsite preform body; and then, drying the ceramsite preform body, roasting at a high temperature and sintering and expanding the preform body into ceramsite, cooling to the normal temperature, revolving a kettle to preferably select cavings as fuels. The ceramsite produced by the harmless utilization method disclosed by the invention meets the standard requirements of national lightweight aggregate building materials, not only effectively realizes harmless treatment to the sludge produced in a mononitrotoluene production process, but also recycles the bentonite tailings, so that the discharge is effectively controlled in the whole process, the secondary pollution is not produced, and the economic benefits and the social benefits are synchronously improved.
Description
Technical field
The invention discloses the method that sewage sludge harmlessness that a kind of MNT produces utilizes, belong to the recycle utilization of useless innoxious, the resource utilization of solid danger.
Background technology
Improving constantly in recent years along with our people's standard of living and process of industrialization, the material consumption amount of entire society strengthens rapidly, and the consequent is the generation of a large amount of waste and causes harm to environment thus.According to statistics, the whole world produces about more than 400,000,000 tons of danger wastes every year, and wherein the industry and mining such as chemical industry, metallurgy, printing and dyeing are main sources that danger wastes produces.The improper disposal of danger wastes not only can cause serious harm to HUMAN HEALTH and environment, also can cause the pollution of underground water, earth's surface water and soil, and therefore danger wastes is that the world today faces one of the most thorny environmental problem.
Maximum with trade waste in danger wastes, mainly industrial solid castoff.Chemical enterprise is that economic society makes a great contribution, but the environmental problem that the refuse produced in chemical process brings more and more causes the great attention of people.
In relevant chemical enterprise factory waste water mainly contain MNT and neighbour// para-totuidine production process produces waste water, equipment and ground flushing water, the draining of spent acid device vacuum pump, off gas treatment water, early-stage rainwater and sanitary wastewater etc., and produce waste water in MNT production process and mix with other waste water after " acid out pre-treatment+iron carbon reduction+Fenton oxidation+coagulating sedimentation " processes and carry out biochemical treatment.Thus formed " materialized mud that MNT production process produces and the composite waste biochemical sludge mud that produces of press filtration in the lump ".The waste water produced in MNT production process, belongs to the waste liquid produced in " National Hazard refuse register " (2008) HW06 " organic solvent refuse " 261-001-06 " oil of mirbane-aniline " production process.According to " what judge about industry production waste water physicochemical lignin-sludge attributes such as chemical industry writes a letter in reply " (ring does No. [2014] 1549, letter) requirement, the mud produced in its materializing strategy process is suitable in " National Hazard refuse register " middle other refuse of HW49 class " the wastewater treatment mud in Hazardous wastes materializing strategy process and residue ".The mixing sludge of the waste water physicochemical mud therefore produced in this type of chemical enterprise MNT production process and mixing biochemical sludge belongs to Hazardous wastes (HW49,802-006-49).This mud must require to dispose according to Hazardous Wastes Management.
Have the disposal technology of multiple Hazardous wastes at present both at home and abroad, as high temperature incineration (Rotation error, pyrogenation incinerator, grate furnace etc.), sanitary landfill, chemical disinfection, hertzian wave sterilizing etc.These disposal technologies all more or less come with some shortcomings except high temperature incineration, and as sanitary landfill exists larger future trouble, objectionable impurities is easily leaked and caused secondary environmental pollution etc.; Chemical disinfection can not process volatile organic compounds, chemical agent etc., and sterilisation effect is difficult to ensure, and the toxic waste liquid produced easily causes secondary pollution.In the treatment technology of various Hazardous wastes, only have degree that incineration treatment technology can be maximum and permanent destruction, decomposition of dangerous refuse simultaneously subtract appearance loss of weight greatly so far, pollutent is focused on, thus better controls secondary pollution.Burning method can realize minimizing, innoxious and resource utilization because of it when processing danger wastes simultaneously, is considered to the method the most effectively processing Hazardous wastes.
Burning method process Hazardous wastes is widely used in developed countries such as America and Europes.The eighties in 20th century, the U.S. has carried out the work of knowing the real situation of a large amount of scientific efforts and incinerator.2004, the dangerous waste incineration device that the U.S. has adopted had 276, and what wherein utilize rotary kiln to dispose has 75 more than, and quite a few is light-weight aggregate rotary kiln.China's dangerous waste disposal work is at the early-stage, and dangerous waste disposal mainly contains burning and landfill two kinds of modes.Burning method can realize minimizing, innoxious and resource utilization because of it when processing danger wastes simultaneously, and be considered to the method the most effectively processing danger wastes, Ye Shi China danger wastes focuses on the method that center main will adopt.Through domestic and international technical research in the past few years and domestic technique demonstration, relevant government department establishes and adopts technology using rotary kiln as the main technological route in China from now on dangerous waste disposal.
Wilkinite is a kind of clay rock, also known as smectite clay rock, main chemical compositions is silicon-dioxide, aluminium sesquioxide and water, also containing elements such as iron, magnesium, calcium, sodium, potassium, there is due to wilkinite the performances such as water-absorbent, swelling property, cationic exchange, thixotropy, cohesiveness, adsorptivity, thickening property, oilness, stability, decolourising property, be widely used in each industrial sector.But generally adopt richness during each relevant enterprise recycling wilkinite mineral reserve to abandon poor, wilkinite mine tailing and often can not get good utilization, serious waste of resources and harm is to a certain degree caused, for effective comprehensive utilization of wilkinite mine tailing proposes problem to ecotope.
In the industrial production, turning circle cylindrical apparatus is used to be called as rotary kiln (being commonly called as rotary kiln) to the equipment that material carries out the processing treatment such as machinery, physics and chemistry.Rotary kiln obtains very big application in environmental protection, and the country of some prosperities in the world such as the U.S., European Union, Japan has started to adopt rotary kiln process industry, domestic refuse and bazardous waste etc. as far back as 20 century 70s.The ground such as Beijing and Shanghai in 1988 start to utilize rotary kiln incineration danger wastes etc., and from then on China starts and uses rotary kiln process waste and rubbish in environmental protection.A lot of enterprises rotary kiln is had to produce haydite both at home and abroad.
Haydite is a kind of lightweight and has manufactured particles's shape material of some strength, can be used for producing light aggregate concrete, concrete segment and other materials for walls, the concrete and the materials for wall that employ haydite can significantly reduce concrete unit weight, improve the thermal and insulating performance of buildings, significantly reduce the energy consumption of buildings.As a kind of light-duty particle of ceramic, the rounded or oval-shaped ball of haydite external appearance characteristic major part, its shape is different because technique is different, and surface is the hard shell of one deck, has water proof, protects gas effect, thus have higher intensity.Haydite due to internal porous, therefore has good thermal and insulating performance.Reduce discharging because China pushes forward building energy conservation comprehensively, protection of the environment, improves building function, therefore haydite is widely used in building trade is used for replacing the material such as rubble.The production method of haydite mainly contains burning free type and sintered type.Sintered type is produced haydite and Hazardous wastes process and building material production ideally can be combined, and should be Future Development important directions.
Research shows, the haydite blank chemical constitution with high-expansion energy should be: SiO2:Al2O3:(CaO+MgO+Fe2O3+Na2O+K2O)=(48-79): (10-25): (13-26).By producing the chemical constitution study analysis of mud, wilkinite or wilkinite mine tailing to MNT, the present invention determines two kinds of raw-material weight ratios of haydite material accordingly, within the scope of this, under rotary kiln baking condition, all can produce qualified haydite.
Have lot of documents to study utilizing mud to produce haydite both at home and abroad, and the patent of this respect also gets more and more, but utilize MNT to produce the method for mud, wilkinite or wilkinite mine tailing baking ceramsite, a current or blank.
Summary of the invention
In order to solve problems of the prior art, the invention provides a kind of method that mud utilizing MNT to produce makes haydite, adopt the haydite can not only produced in this way and there is extensive use, and be even more important, effectively can also dispose Hazardous wastes for some chemical enterprises and find a way out.The present invention abandons and produces haydite to the dependence of the resource-type raw materials such as clay, produce mud and wilkinite or wilkinite mine tailing for important source material with MNT to fully utilize, really achieve " turning waste into wealth " green production object, embody energy-saving and emission-reduction, recycling economy development characteristic, there is important society, environment, economic implications.
The mud utilizing MNT to produce provided by the present invention makes the method for haydite, comprises the following steps:
The first step, raw material preparation: (1) MNT produces mud, it mixes with other waste water after materializing strategy and carry out biochemical treatment by producing waste water in MNT production process and formed, and water ratio is 60%-70%;
(2) wilkinite or wilkinite mine tailing is major ingredient with montmorillonite, for subsequent use after drying and other treatment, containing water management below 5%;
Second step, wheel rolles over mixing: above-mentioned raw materials is carried out proportioning by weight, gets MNT and produces mud 5-30%, wilkinite or wilkinite mine tailing 70-95%, carries out wheel and rolles over, stirs, make their Homogeneous phase mixing;
3rd step, stacks fermentation: mixed uniformly raw material is stacked 1-2 days in room, the organic substance composition of their inside is fermented, then uses whipping device mix and blend, make it loose as far as possible, keeps temperature humidity even;
4th step, pair roller granulation: use twin rollers to carry out extruder grain to the material that the 3rd step is formed, forms the haydite blank of particle diameter at 5mm-15mm;
5th step, revolution heating: heated in qualified haydite blank feeding rotary kiln by blank transmission equipment, rotary kiln divides two sections, epimere is little kiln, and topmost portion claims kiln hood, and hypomere is Dayao, lowermost part is kiln tail, and haydite blank enters from kiln hood, is dried by gradient-heated;
Continued to enter rotary kiln Dayao to the rolling of kiln tail by the haydite blank of drying and carry out high-temperature roasting;
6th step, naturally cooling: the haydite after high-temperature roasting, from kiln tail kiln discharge, cools at ambient temperature, thus prepared.
More optimizedly, the cavings of the fuel used preferred rice factory of rotary kiln, by it pulverize, lights from kiln tail spirt rotary kiln with gas blower.
More optimizedly, the tail gas that rotary kiln produces, by semidrying flue gas ash removal method, processes with bag-ty pe dust collection again, thus guarantees that Exhaust Gas is up to standard.
The haydite purposes that the present invention produces is wide: preparation light aggregate concrete; Produce light block; For the production of Light trabs; For roof insulation, look for slope; For flooring bed course, moisture-proof barrier; Afforest for balcony garden; For the soilless culture of pot flowers, gardening; For sewage disposal etc.This haydite is a kind of novel ecological environmentfriendly products, is the high-tech product of the reduction of discharging of a kind of applicating energy-saving and circular economy concept.
This mud used does not have cost, and on the contrary, relevant mud produces business unit and also will pay haydite manufacturing enterprise certain solidification disposal of waste expense.Wilkinite used or wilkinite mine tailing are mainly derived from some bentonite ores quarrel, and required expense is also extremely cheap.All raw material all easily obtains.The present invention does not have new waste liquid and solid waste to produce, and fragmentary waste gas also completes and reaches qualified discharge.And use the secondary factory product cavings of grain processing enterprises and institutions, realize energy-conservation object, the organic matter simultaneously in mud has suitable calorific value, and it has certain combustion-supporting effect, thus also achieves energy-conservation target.So the present invention to be starting material easy, economic worth is high, and energy-conserving and environment-protective are good, the good method of refuse reclamation.
Embodiment
Be described in detail below in conjunction with the preferred embodiments of the present invention, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
The mud utilizing MNT to produce provided by the present invention makes the method for haydite, comprises the following steps:
The first step, raw material preparation: (1) MNT produces mud, it mixes with other waste water after materializing strategy and carry out biochemical treatment by producing waste water in MNT production process and formed, and water ratio is 60%-70%;
(2) wilkinite or wilkinite mine tailing is major ingredient with montmorillonite, for subsequent use after drying and other treatment, containing water management below 5%;
Second step, wheel rolles over mixing: above-mentioned raw materials is carried out proportioning by weight, gets MNT and produces mud 5-10%, wilkinite or wilkinite mine tailing 70-95%, carries out wheel and rolles over, stirs, make their Homogeneous phase mixing;
3rd step, stacks fermentation: mixed uniformly raw material is stacked 1-2 days in room, the organic substance composition of their inside is fermented, then uses whipping device mix and blend, make it loose as far as possible, keeps temperature humidity even;
4th step, pair roller granulation: use twin rollers to carry out extruder grain to the material that the 3rd step is formed, forms the haydite blank of particle diameter at 5mm-15mm;
5th step, revolution heating: heated in qualified haydite blank feeding rotary kiln by blank transmission equipment, rotary kiln divides two sections, epimere is little kiln, and topmost portion claims kiln hood, and hypomere is Dayao, lowermost part is kiln tail, and haydite blank enters from kiln hood, is dried by gradient-heated;
Continued to enter rotary kiln Dayao to the rolling of kiln tail by the haydite blank of drying and carry out high-temperature roasting;
6th step, naturally cooling: the haydite after high-temperature roasting, from kiln tail kiln discharge, cools at ambient temperature, thus prepared.
The cavings of the fuel used preferred rice factory of rotary kiln, by it pulverize, lights from kiln tail spirt rotary kiln with gas blower.
The tail gas that rotary kiln produces, by semidrying flue gas ash removal method, processes with bag-ty pe dust collection again, thus guarantees that Exhaust Gas is up to standard.
Claims (3)
1. the method that the sewage sludge harmlessness that MNT is produced utilizes, is characterized in that, comprise the following steps:
The first step, raw material preparation: (1) MNT produces mud, it mixes with other waste water after materializing strategy and carry out biochemical treatment by producing waste water in MNT production process and formed, and water ratio is 60%-70%;
(2) wilkinite or wilkinite mine tailing is major ingredient with montmorillonite, for subsequent use after drying and other treatment, containing water management below 5%;
Second step, wheel rolles over mixing: above-mentioned raw materials is carried out proportioning by weight, gets MNT and produces mud 5-30%, wilkinite or wilkinite mine tailing 70-95%, carries out wheel and rolles over, stirs, make their Homogeneous phase mixing;
3rd step, stacks fermentation: mixed uniformly raw material is stacked 1-2 days in room, the organic substance composition of their inside is fermented, then uses whipping device mix and blend, make it loose as far as possible, keeps temperature humidity even;
4th step, pair roller granulation: use twin rollers to carry out extruder grain to the material that the 3rd step is formed, forms the haydite blank of particle diameter at 5mm-15mm;
5th step, revolution heating: heated in qualified haydite blank feeding rotary kiln by blank transmission equipment, rotary kiln divides two sections, epimere is little kiln, and topmost portion claims kiln hood, and hypomere is Dayao, lowermost part is kiln tail, and haydite blank enters from kiln hood, is dried by gradient-heated;
Continued to enter rotary kiln Dayao to the rolling of kiln tail by the haydite blank of drying and carry out high-temperature roasting;
6th step, naturally cooling: the haydite after high-temperature roasting, from kiln tail kiln discharge, cools at ambient temperature, thus prepared.
2. according to claim 1 the mud utilizing MNT to produce of stating make the method for haydite, it is characterized in that: the cavings of the fuel used preferred rice factory of rotary kiln, by it pulverize, light from kiln tail spirt rotary kiln with gas blower.
3. the mud utilizing MNT to produce according to claim 1 makes the method for haydite, it is characterized in that: the tail gas that rotary kiln produces, by semidrying flue gas ash removal method, processes with bag-ty pe dust collection again, thus guarantee that Exhaust Gas is up to standard.
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| CN201510049387.4A CN104591694B (en) | 2015-01-31 | 2015-01-31 | The method that the sewage sludge harmlessness that a kind of MNT produces utilizes |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111320490A (en) * | 2020-04-17 | 2020-06-23 | 天津市恒达正泰建筑基础工程有限公司 | Ceramsite with high acid-washing sludge content and preparation method thereof |
Citations (4)
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| CN101265077A (en) * | 2008-04-19 | 2008-09-17 | 西安墙体材料研究设计院 | Technique for producing energy-saving sintering brick by silt |
| 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 |
| CN102351559A (en) * | 2011-08-22 | 2012-02-15 | 中山建华墙体材料有限公司 | Haydite and preparation method thereof |
| CN103304218A (en) * | 2013-06-17 | 2013-09-18 | 江苏全能机械设备有限公司 | Method for preparing ceramsite by utilizing domestic sludge and riverway sludge |
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- 2015-01-31 CN CN201510049387.4A patent/CN104591694B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265077A (en) * | 2008-04-19 | 2008-09-17 | 西安墙体材料研究设计院 | Technique for producing energy-saving sintering brick by silt |
| 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 |
| CN102351559A (en) * | 2011-08-22 | 2012-02-15 | 中山建华墙体材料有限公司 | Haydite and preparation method thereof |
| CN103304218A (en) * | 2013-06-17 | 2013-09-18 | 江苏全能机械设备有限公司 | Method for preparing ceramsite by utilizing domestic sludge and riverway sludge |
Non-Patent Citations (1)
| Title |
|---|
| 刘景明等: "由化工脱水污泥烧制陶粒", 《北京科技大学学报》, vol. 30, no. 10, 31 October 2008 (2008-10-31) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111320490A (en) * | 2020-04-17 | 2020-06-23 | 天津市恒达正泰建筑基础工程有限公司 | Ceramsite with high acid-washing sludge content and preparation method thereof |
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