CN101007975A - Method for preparing clean coal from sludge - Google Patents
Method for preparing clean coal from sludge Download PDFInfo
- Publication number
- CN101007975A CN101007975A CNA2007100263562A CN200710026356A CN101007975A CN 101007975 A CN101007975 A CN 101007975A CN A2007100263562 A CNA2007100263562 A CN A2007100263562A CN 200710026356 A CN200710026356 A CN 200710026356A CN 101007975 A CN101007975 A CN 101007975A
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- China
- Prior art keywords
- mud
- sludge
- coal
- clean coal
- industrial chemicals
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention relates to a method for preparing clean coal with sludge, comprising hardening, dewatering, baking and mixing. The invention is characterized by simple method, low energy consumption, high energy of produced clean coal, high caloric value of 6000 kcal/ kg, and important economical and social benefit.
Description
Technical field
The invention belongs to mud and recycle the field, be specifically related to a kind of method of preparing clean coal from sludge.
Background technology
Wastewater sludge is an inevitable residue in city and the Industrial Wastewater Treatment process.Owing to environmental protection requirement, the waste water that needs to handle gets more and more, thereby the quantity of mud is also more and more huger in modernized big city.Mud is handled on how innoxious, resource utilization ground, will become an environmental protection and an energy-conservation important topic in the modern city.Can adopt the primary landfill and make fertile method the processing of mud.But the water ratio of mud contains toxic heavy metal again up to about 80%, adopts this method not only to occupy a large amount of soils, and the severe contamination groundwater resource, worsens soil quality, the ecotope around destroying, and its consequence is more and more serious.Except landfill, can also use burning method to the processing of mud.Because the existence of large quantity of moisture, simple burning method need add a large amount of fuel, and as coal, waste oil, the dried wood powder of plastic waste etc., running cost is higher, and anti-simultaneously corruption requirement such as deodorize makes that the equipment manufacturing cost of burning sludge is quite high.Also explored both at home and abroad with additive method,, made processing mud such as material of construction as the compressed moulding method.Because sludge components is special, the economic feasibility of making brick from sludge depends primarily on the sludge dewatering cost.
Mud mainly is made up of organism.Organism contains a large amount of potential energies, and (superior calorific value of its over dry material can reach 3500～5000kal/kg), is a kind of important renewable energy, therefore utilizes the high heating value of mud to prepare the important directions that fuel is recycling sludge.The at present existing multiple technology that mud is changed into fuel, as (moisture between 30%～90% with the mud behind the mechanical dehydration, mostly between 50%～80%) mix with powdery coal and certain quantity of additive, drying adds and is pressed into the moulded coal (patent No. 02133390.4,00123028.X, 99112394.8,94112288.3 etc.).The main drawback of these methods is in the mechanical dehydration process, energy consumption height, and the bunker coal incomplete combustion of gained.
Summary of the invention
The method that the purpose of this invention is to provide preparing clean coal from sludge a kind of environmental protection, that energy consumption is low.
The present invention is achieved in that a kind of method of preparing clean coal from sludge, and its preparation process is as follows:
A, modified, after the adding filtrate, interpolation contains Fe in mud
3+Industrial chemicals stirs, and behind question response 2～12min, interpolation contains Ca again
2+Industrial chemicals stirs, reaction 3～15min;
B, dehydration, the mud after modified are introduced in the pressure filter its moisture filter are fallen, and under the pressure of 1.5MPa～2.5MPa pressurize 30～70min;
C, oven dry enter the stoving oven oven dry with the mud after the dehydration;
D, mixing, with mud and coal after the oven dry by 75～95: 25～5 proportioning is mixed and is obtained clean coal.
The described Fe that contains
3+The content of industrial chemicals is 0.3～2%.
The described Ca that contains
2+The content of industrial chemicals is 0.5～5%.
The defective that the present invention is directed to present mud system bunker coal provides a kind of brand-new solution, can utilize the producing apparatus of existing moulded coal, is that component is prepared a large amount of clean coals with mud, as industry and civilian solid fuel.Its mud component has replaced clay as briquette binder, can save clay resource in a large number, simultaneously owing to the large amount of organic potential that is contained in the mud, can improve the thermal value of moulded coal, saves the coal consumption, can reduce the growing amount that moulded coal burns the back ash again; The additive that the present invention added in the modified water smoking of mud not only reduces the dehydration energy consumption, can also play solid sulphur effect at the readymade coal combustion phases; The present invention can directly utilize the mud that contains large quantity of moisture, thereby can directly handle on the spot and utilize headachy mud, has both solved the problem of environmental pollution of mud, makes a silk purse out of a sow's ear again, and the energy is provided, and has important economy and social using value.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.
A kind of method of preparing clean coal from sludge, its preparation process is as follows:
A, modified, after the adding filtrate, interpolation contains Fe in mud
3+Industrial chemicals stirs, and behind question response 2～12min, interpolation contains Ca again
2+Industrial chemicals stirs, reaction 3～15min.Contain Fe
3+During industrial chemicals plays and electrostatic breakdown mud alternately and volume sweep the effect of cohesion.Contain Ca
2+Industrial chemicals is the mixture (can not add thermal power plant's waste residue as required) of common chemical raw materials and thermal power plant's waste residue, and its effect is to increase the grain diameter of mud and improve pellet hardness, play the effect that helps filter and build bridge absorption.
B, dehydration, the mud after modified are introduced in the pressure filter its moisture filter are fallen, and under the pressure of 1.5MPa～2.5MPa pressurize 30～70min.
C, oven dry enter the stoving oven oven dry with the mud after the dehydration;
D, mixing, with mud and coal after the oven dry by 75～95: 25～5 proportioning is mixed and is obtained clean coal.Described coal is generally electric coal, refuse coal of brown coal, bituminous coal, hard coal or coke, power plant etc.
Contain Fe
3+The content of industrial chemicals is 0.3～2%, contains Ca
2+The content of industrial chemicals is 0.5～5%.The most suitable.
Embodiment 1
1, get moisture 80.6% municipal sludge, adding filtrate, to transfer to moisture be about 90%;
2, interpolation contains Fe
3+Industrial chemicals (1# additive), addition is 0.5%, fully stirring reaction 8min;
3, interpolation contains Ca then
2+Industrial chemicals (2# additive), addition is 1.5%, fully stirring reaction 5min;
4, inject plate-and-frame filter press by the anti-mud that mixes up of ram pump, advancing mud pressure is 0.3MPa, when reaching the mud amount, behind pressurize 40min under the pressure about 1.8MPa, so that the moisture in the mud is taken off;
5, after pressurize is finished, the release blowing, the water ratio of mud reaches 57.3%.
6, the mud after the dehydration is by the drying installation of air stream drying and roller drying combination, air output 10000m
3/ h, air inducing amount 30000m
3/ h, drying sludge time 50s, dried moisture percentage in sewage sludge 6.8%.
7, dewatered sludge mixes blending ratio with 4 purpose brown coal: 75 parts in mud, 25 parts in brown coal.The calorific value 5100kcal/kg of the clean coal of gained.
Embodiment 2
1, get moisture 78.4% municipal sludge, adding filtrate, to transfer to moisture be about 90%;
2, interpolation contains Fe
3+Industrial chemicals (1# additive), addition is 1%, fully stirring reaction 10min;
3, interpolation contains Ca then
2+Industrial chemicals (2# additive), addition is 2%, fully stirring reaction 5min;
4, inject plate-and-frame filter press by the anti-mud that mixes up of ram pump, advancing mud pressure is 0.3MPa, when reaching the mud amount, behind pressurize 50min under the pressure about 2.0MPa, so that the moisture in the mud is taken off;
5, after pressurize is finished, the release blowing, the water ratio of mud reaches 61.8%.
6, the mud after the dehydration is by the drying installation of air stream drying and roller drying combination, air output 10000m
3/ h, air inducing amount 30000m
3/ h, drying sludge time 44s, dried moisture percentage in sewage sludge 7.2%.
7, dewatered sludge mixes blending ratio with 4 purpose bituminous coal: 80 parts in mud, 20 parts in brown coal.The calorific value 4980kcal/kg of the clean coal of gained.
Embodiment 3
1, get moisture 80.2% municipal sludge, adding filtrate, to transfer to moisture be about 90%;
2, interpolation contains Fe
3+Industrial chemicals (1# additive), addition is 0.3%, fully stirring reaction 5min;
3, interpolation contains Ca then
2+Industrial chemicals (2# additive), addition is 2.5%, fully stirring reaction 5min;
4, inject plate-and-frame filter press by the anti-mud that mixes up of ram pump, advancing mud pressure is 0.3MPa, when reaching the mud amount, behind pressurize 50min under the pressure about 2.0MPa, so that the moisture in the mud is taken off;
5, after pressurize is finished, the release blowing, the water ratio of mud reaches 59.1%.
6, the mud after the dehydration is by the drying installation of air stream drying and roller drying combination, air output 10000m
3/ h, air inducing amount 30000m
3/ h, drying sludge time 55s, dried moisture percentage in sewage sludge 6.2%.
7, dewatered sludge mixes blending ratio with 4 purpose brown coal: 85 parts in mud, 25 parts in brown coal.The calorific value 5020kcal/kg of the clean coal of gained.
Claims (3)
1. the method for a preparing clean coal from sludge is characterized in that, its preparation process is as follows:
A, modified, after the adding filtrate, interpolation contains Fe in mud
3+Industrial chemicals stirs, and behind question response 2～12min, interpolation contains Ca again
2+Industrial chemicals stirs, reaction 3～15min;
B, dehydration, the mud after modified are introduced in the pressure filter its moisture filter are fallen, and under the pressure of 1.5MPa～2.5MPa pressurize 30～70min;
C, oven dry enter the stoving oven oven dry with the mud after the dehydration;
D, mixing, with mud and coal after the oven dry by 75～95: 25～5 proportioning is mixed and is obtained clean coal.
2. the method for preparing clean coal from sludge according to claim 1 is characterized in that: the described Fe of containing
3+The content of industrial chemicals is 0.3～2%.
3. the method for preparing clean coal from sludge according to claim 1 is characterized in that: the described Ca of containing
2+The content of industrial chemicals is 0.5～5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100263562A CN101007975A (en) | 2007-01-17 | 2007-01-17 | Method for preparing clean coal from sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100263562A CN101007975A (en) | 2007-01-17 | 2007-01-17 | Method for preparing clean coal from sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101007975A true CN101007975A (en) | 2007-08-01 |
Family
ID=38696638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100263562A Pending CN101007975A (en) | 2007-01-17 | 2007-01-17 | Method for preparing clean coal from sludge |
Country Status (1)
| Country | Link |
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| CN (1) | CN101007975A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358153B (en) * | 2008-09-22 | 2011-09-21 | 武汉路德科技有限责任公司 | Dry sludge production method of auxiliary fuel for power plant boiler and process equipment |
| CN102492513A (en) * | 2011-12-07 | 2012-06-13 | 山西艾森资源综合利用技术研究院 | Method for preparing synthetic sludge fuel with low energy consumption |
| CN103833191A (en) * | 2014-03-12 | 2014-06-04 | 江苏绿威环保科技有限公司 | Preparation method of new energy fuel based on sewage sludge ash |
| CN105368520A (en) * | 2015-10-09 | 2016-03-02 | 杨品虎 | Preparing method for biomass formed granular fuel |
| CN106051787A (en) * | 2016-06-21 | 2016-10-26 | 鲁泰纺织股份有限公司 | Drying and blending combustion method of dyeing sludge |
| CN106118792A (en) * | 2016-06-28 | 2016-11-16 | 卓宇轩 | A kind of sludge synthetic fuel and manufacture method thereof |
| CN109504485A (en) * | 2018-11-07 | 2019-03-22 | 辽宁大唐国际阜新煤制天然气有限责任公司 | Utilize the solid fuel and its preparation method and application of sewage plant sludge preparation |
| CN111019733A (en) * | 2019-12-05 | 2020-04-17 | 山西太钢不锈钢股份有限公司 | Biochemical sludge electricity-mixed coal blending combustion system and method |
-
2007
- 2007-01-17 CN CNA2007100263562A patent/CN101007975A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358153B (en) * | 2008-09-22 | 2011-09-21 | 武汉路德科技有限责任公司 | Dry sludge production method of auxiliary fuel for power plant boiler and process equipment |
| CN102492513A (en) * | 2011-12-07 | 2012-06-13 | 山西艾森资源综合利用技术研究院 | Method for preparing synthetic sludge fuel with low energy consumption |
| CN103833191A (en) * | 2014-03-12 | 2014-06-04 | 江苏绿威环保科技有限公司 | Preparation method of new energy fuel based on sewage sludge ash |
| CN105368520A (en) * | 2015-10-09 | 2016-03-02 | 杨品虎 | Preparing method for biomass formed granular fuel |
| CN106051787A (en) * | 2016-06-21 | 2016-10-26 | 鲁泰纺织股份有限公司 | Drying and blending combustion method of dyeing sludge |
| CN106118792A (en) * | 2016-06-28 | 2016-11-16 | 卓宇轩 | A kind of sludge synthetic fuel and manufacture method thereof |
| CN109504485A (en) * | 2018-11-07 | 2019-03-22 | 辽宁大唐国际阜新煤制天然气有限责任公司 | Utilize the solid fuel and its preparation method and application of sewage plant sludge preparation |
| CN111019733A (en) * | 2019-12-05 | 2020-04-17 | 山西太钢不锈钢股份有限公司 | Biochemical sludge electricity-mixed coal blending combustion system and method |
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Open date: 20070801 |