CN101602970A - A kind of environment friendly sludge water-coal-slurry and preparation method thereof - Google Patents
A kind of environment friendly sludge water-coal-slurry and preparation method thereof Download PDFInfo
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- CN101602970A CN101602970A CNA2008101823087A CN200810182308A CN101602970A CN 101602970 A CN101602970 A CN 101602970A CN A2008101823087 A CNA2008101823087 A CN A2008101823087A CN 200810182308 A CN200810182308 A CN 200810182308A CN 101602970 A CN101602970 A CN 101602970A
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Abstract
The invention discloses a kind of environment friendly sludge water-coal-slurry and preparation method thereof.Component and parts by weight content comprise: 100～200 parts in coal, 10～100 parts of sludge from wastewater treatment plant, 0～120 part in water, 1～5 part of additive, 0～15 part of sweetening agent, 1～5 part of sludge modification medicament.The present invention is simple to operate, less energy consumption, and cost is low, does not have secondary pollution.This preparation method has the sludge water-coal-slurry of making pulping concentration and brings up to more than 55%, make the mud incorporation reach (in butt) more than 6%, need not mix stablizer, long-term placement can not produce hard-caked sediment, apparent viscosity is fit to pumping and spray burning or gasification below 1200mPa.s.The sludge water-coal-slurry of the present invention's preparation can be used as liquid fuel, can not only make full use of the heat energy in the sludge from wastewater treatment plant, and desulfurization degree improves more than 40%, and can significantly reduce the discharging of nuisances such as organic pollutant such as polycyclic aromatic hydrocarbons.
Description
Technical field
The present invention relates to a kind of environment friendly sludge water-coal-slurry and preparation method thereof.
Technical background
Coal water slurry is a kind of novel coal based fluid fuel that occurs early 1980s, makes coal change into a kind of liquid fuel from traditional solid combustion, thus have lowly pollute, efficient, energy-conservation, outstanding advantage that running cost is low.The average sulfur-bearing of secondary coal water slurry is less than 0.5%, and ash content is less than 7%; One-level coal water slurry sulphur content, ash content are then lower, just reduce the content of sulfurous gas from the source greatly.Because coal water slurry is liquid, again can be as heavy oil storage, pumping, spray burning, burn-off rate can reach more than 98%, significantly reduces the discharging of carcinogenic contaminants such as aromatic hydroxy compound benzopyrene, plays the efficient energy-saving and emission-reducing effect.
Mud is the sedimentable matter that the municipal sewage plant produces in sewage treatment process, usually account for 0.05～0.1% of sewage total amount, the zoogloea that is formed by multiple microorganism reaches the aggregate of forming with its adsorbed organic matter and inorganics, (can be before the dehydration except that containing a large amount of moisture content up to 99%, behind the mechanical dehydration about 80%), also contain the organism that is difficult to degrade, heavy metal and salt, and pathogenic micro-organism and parasitic ovum etc., organic content height in the mud, very easily corrupt, and the generation stench, a large amount of undressed mud are stacked and discharging has caused new pollution to environment.Sludge reduction, innoxious, resource utilization are the developing direction that sludge of sewage treatment plant is handled.The mud of municipal sewage plant at present main treatment and disposal method has agricultural, landfill or incineration disposal, and the application aspect the preparation material of construction seldom.The technology and equipment complexity of burning, energy consumption is big, and expense is higher, and atmosphere polluting problem is arranged; The landfill rule is subjected to the land used restriction, and pollutes the environment; Throw sea meeting Marine Pollution, international convention is prohibited.Mud makes that but fertilizer is agricultural to have advantage such as economical and convenient resource utilization, must be noted that strict control toxic substance but mud is agricultural, note the pollution of heavy metal, and especially China rural area awareness is not high, promotes agricultural ratio more than low abroad.
Sludge from wastewater treatment plant contains a large amount of heats, adopts certain technical finesse measure, participates in burning together in the coal water slurry, is the recycling sludge problem of extensively being studied in the present energy-saving and emission-reduction project.Existing patented technology, for example Chinese patent 200410024452.X adds the medicament of energy modified sewage sludge in the process of preparation sludge water-coal-slurry, cause the pulping concentration of sludge water-coal-slurry not high, generally be lower than 55% (weight), also make mud in coal water slurry, disperse not exclusively to cause the too much thermosteresis and the interruption of service in actual applications easily.Though Chinese patent 200610030071.1 has added the medicament of energy modified sewage sludge in the process of preparation sludge water-coal-slurry for another example, but do not consider that sludge water-coal-slurry may discharge more pollutent than ortho-water coal slurry, thereby do not solve the requirement in the environmental protection, especially this patent system Preparation Method has fatal defective, Chinese patent 200610030071.1 the preparation sludge water-coal-slurry process in former coal cinder (in its specification sheets embodiment all usefulness be coal cinder) grind pulping with modified sewage sludge, cell and extracellular polymeric thereof in the mud are broken, decompose, the viscosity of sludge water-coal-slurry is heightened be unfavorable for the mobile requirement of sludge water-coal-slurry, also consume more power consumption, because be rich in polyacrylamide and cell extracellular polymeric in the sludge from wastewater treatment plant, their reality all is tough coal water mixture stabilizing agent, and COAL-WATER SLURRY TECHNOLOGY code requirement stablizer adds behind the coal water slurry pulping; This patent also makes former coal dust grind particle diameter (grating) that the back particle diameter can not satisfy the high-quality coal water slurry to require promptly can't make particle diameter in the sludge water-coal-slurry to account for (weight) more than 80% less than 0.06 millimeter particle, coal content and fuel burnout rate in the coal water slurry have been reduced, increase carcinogenic dischargings such as aromatic hydroxy compound benzo [a] pyrene, though perhaps can satisfy particle diameter (grating) requirement of high-quality coal water slurry, but mud is ground the back extracellular polymeric by high strength and separates out, thereby bacterial cell breaks and causes mud viscosity very big, the incorporation that yet causes the mud that can mix does not just seldom have energy-saving effect; Mud in the Chinese patent 200610030071.1 also comprises Industrial Wastewater Treatment mud and paper mill effluent processing mud, and also has a large amount of hard solid particulate matter in these mud, their nozzles that can stop up and wear and tear when the sludge water-coal-slurry spray burning bring obstacle for the manufacturing and the practical application of sludge water-coal-slurry.
Summary of the invention
The technical issues that need to address of the present invention are to disclose a kind of sludge water-coal-slurry and preparation method thereof, to overcome the shortcoming and defect of above-mentioned prior art.
The component of sludge water-coal-slurry of the present invention and parts by weight content comprise:
100～200 parts in coal
10～100 parts of sludge from wastewater treatment plant
0～120 part in water
1～5 part of additive
0～15 part of sweetening agent
1～5 part of sludge modification medicament
Described sludge from wastewater treatment plant water ratio is 50%～95%, weight.
Described additive is any one or a few in sulfonate series, polycarboxylate series or the polyphosphoric acid salt that is commonly used for coal water slurry dispersing agent.
Described sweetening agent is any one or a few in lime carbonate, calcium hydroxide or the calcium oxide.
Described sludge modification medicament is any one or a few in lime carbonate, calcium hydroxide, calcium oxide, yellow soda ash, sodium bicarbonate, salt of wormwood, sodium hydroxide, potassium hydroxide, calcium chloride or the magnesium chloride.
Particle diameter accounts for (weight) more than 80% less than 0.06 millimeter particle in the described environment friendly sludge water-coal-slurry.
The mol ratio of calcium and sulphur is greater than 2 in the described environment friendly sludge water-coal-slurry.
First kind of preparation method of described environment friendly sludge water-coal-slurry comprises the steps:
Suitable quantity of water, sludge from wastewater treatment plant mixed with the sludge modification medicament and stir or the short period of time grinds, and make that the mud granule is broken to get final product, modified sewage sludge; (illustrate: when the sludge from wastewater treatment plant water content is higher, can not add water, but when the sludge from wastewater treatment plant water content is low, can add suitable quantity of water, to help promoting the dissolving or the dispersion of sludge modification medicament.Down together);
Above-mentioned modified sewage sludge, water, fine breeze, additive and sweetening agent mixed and stir or the short period of time is ground pulping, the particle diameter that makes solid particulate promptly obtains said environment friendly sludge water-coal-slurry less than 0.5 millimeter.(illustrate: herein short period of time grinds guaranteeing that zoogloea is broken up and is evenly dispersed in the coal water slurry in the sludge from wastewater treatment plant, and its bacterium and bacterial extracellular polymer thing are by significantly broken and do not cause the huge liter of viscosity.Down together);
Second kind of preparation method of described environment friendly sludge water-coal-slurry comprises the steps:
With suitable quantity of water, coal, additive and partly or entirely sweetening agent be added in and be mixed together, grind, make the coal water slurry of not adding stablizer;
Suitable quantity of water, sludge from wastewater treatment plant, sludge modification medicament and an amount of sweetening agent are mixed, stir or the short period of time grinds, and make that the mud granule is broken to get final product, modified sewage sludge;
Above-mentioned coal water slurry, modified sewage sludge mixed and stir or the short period of time is ground pulping, the particle diameter that makes solid particulate promptly obtains said environment friendly sludge water-coal-slurry less than 0.5 millimeter.
The third preparation method of described environment friendly sludge water-coal-slurry comprises the steps:
With suitable quantity of water, coal and partly or entirely additive be added in and be mixed together, grind, make the coal water slurry of not adding stablizer;
With suitable quantity of water, sludge from wastewater treatment plant, sludge modification medicament and partly or entirely sweetening agent mix, stir or the short period of time grinds, and make that the mud granule is broken to get final product, modified sewage sludge;
Above-mentioned coal water slurry, modified sewage sludge, water, an amount of sweetening agent and an amount of additive mixed and stir or the short period of time is ground pulping, the particle diameter that makes solid particulate promptly obtains said environment friendly sludge water-coal-slurry less than 0.5 millimeter.
In addition, can also in sludge from wastewater treatment plant, add the sludge modification medicament, if can also add sweetening agent when the coal water slurry sulphur content is higher, they are mixed, stir or the short period of time grinding, dry or moist, promptly can be made into a kind of product innovation slurries additive agent, this slurries additive agent is added in the finished product coal water slurry, can make coal water slurry produce all advantages of the present invention and positively effect equally.
Advantage of the present invention and positively effect are: simple to operate, and less energy consumption, cost is low, does not produce secondary pollution; This preparation method has advantage and the effect that improves the sludge water-coal-slurry sludge forming performance, pulping concentration can be brought up to (weight) more than 55%, sludge quantity can be brought up to (in butt, weight) more than 6%, can satisfy particle diameter (grating) requirement of high-quality coal water slurry, the fuel burnout rate reaches more than 98%, apparent viscosity need not additionally add stablizer below 1200mPa.s simultaneously, and long-time placement can not produce hard-caked sediment, and good fluidity is fit to pumping and spray burning or gasification.
The environment friendly sludge water-coal-slurry of the present invention's preparation can be used as liquid fuel, can not only make full use of the heat energy in the sludge from wastewater treatment plant, but also overcome difficult problems such as existing mud heat treating method energy consumption height, tail gas and residue poisonous and harmful refractory reason, environment protection type coal water slurry desulphurization during combustion rate improves more than 40%, and can significantly reduce the discharging of organic pollutant such as polycyclic aromatic hydrocarbons PAHs nuisances such as (comprising benzo [a] pyrene), effects of energy saving and emission reduction is remarkable.
Embodiment
Embodiment 1
1. raw material
(1) Foshan City's municipal wastewater treatment plant mud, water ratio 75% (weight), dry basic thermal value 3000Kcal/kg
(2) colliery, Inner Mongol hard coal coal dust is got 600 purpose hard coal coal dusts and accounted for 30% (weight), gets 300 purpose hard coal coal dusts and accounts for 70% (weight), and the two mixes, and becomes mixed coal powder, and is standby
(3) dispersion agent (sodium lignosulfonate)
(4) sweetening agent (500 order Paris white)
(5) sludge modification medicament (500 order Paris white)
(6) tap water
2. preparation condition
(1) proportioning raw materials (parts by weight)
100 parts of mixed coal powders, 35 parts of sludge from wastewater treatment plant, 45 parts in water, 1 part of dispersion agent, 1 part of sweetening agent, 1 part of sludge modification medicament.
(2) preparation method
At first 5 parts of water, sludge from wastewater treatment plant are mixed with the sludge modification medicament and ground 1 minute, modified sewage sludge.
Above-mentioned modified sewage sludge, 40 parts of water, coal dust, dispersion agents are mixed with sweetening agent, fully stir pulping, cross 50 mesh sieves, promptly make sludge water-coal-slurry of the present invention.
3. product performance index
(1) outward appearance: the grey black slurry has good flowability and thixotropy
(2) apparent viscosity: 980mPa.s (30 ℃)
(3) coal content: 55% (weight)
(4) sludge from wastewater treatment plant content: 5% (in butt, weight)
(5) coal saving rate is 3.6%
4. end-use
The place of water coal slurry is done liquid fuel and is used.Burnout rate is more than 98%, and desulfurization degree improves more than 40%, and the discharging of organic pollutant such as polycyclic aromatic hydrocarbons PAHs nuisances such as (comprising benzo [a] pyrene) reduces more than 80%.
Embodiment 2
1. raw material
(1) coal water slurry of not adding stablizer of wet production, coal content 65% (weight), apparent viscosity 810mPa.s (30 ℃)
(2) Foshan City's municipal wastewater treatment plant mud, water ratio 75% (weight)
(3) sludge modification medicament (calcium chloride)
(4) sweetening agent (500 order Paris white)
(5) tap water
2. preparation condition
(1) proportioning raw materials (parts by weight)
100 parts of the coal water slurry of not adding stablizer of wet production, 25 parts of sludge from wastewater treatment plant, 5 parts in water, 1 part of sweetening agent, 0.8 part of sludge modification medicament.
(2) preparation method
At first water, sludge from wastewater treatment plant, sweetening agent are mixed with the sludge modification medicament and stir, calcium chloride dissolves fully, modified sewage sludge.
Above-mentioned modified sewage sludge is mixed with the coal water slurry of not adding stablizer of wet production and stir, cross 50 mesh sieves, promptly make sludge water-coal-slurry of the present invention.
3. product performance index
(1) outward appearance: the grey black slurry has good flowability and thixotropy
(2) apparent viscosity: 1150mPa.s (30 ℃)
(3) coal content: 50% (weight)
(4) sludge from wastewater treatment plant content: 5% (in butt, weight)
4. end-use
The place of water coal slurry is done liquid fuel and is used.Desulfurization degree improves more than 40%, and the discharging of organic pollutant such as polycyclic aromatic hydrocarbons PAHs nuisances such as (comprising benzo [a] pyrene) reduces more than 80%.
Claims (10)
1. an environment friendly sludge water-coal-slurry is characterized in that, component and parts by weight content comprise:
100～200 parts in coal
10～100 parts of sludge from wastewater treatment plant
0～120 part in water
1～5 part of additive
0～15 part of sweetening agent
1～5 part of sludge modification medicament.
2. environment friendly sludge water-coal-slurry according to claim 1 is characterized in that, described sludge from wastewater treatment plant water ratio is 50%～95%, weight.
3. environment friendly sludge water-coal-slurry according to claim 1 is characterized in that, described additive is any one or a few in sulfonate series, polycarboxylate series or the polyphosphoric acid salt that is commonly used for coal water slurry dispersing agent.
4. environment friendly sludge water-coal-slurry according to claim 1 is characterized in that, described sweetening agent is any one or a few in lime carbonate, calcium hydroxide or the calcium oxide.
5. environment friendly sludge water-coal-slurry according to claim 1, it is characterized in that described sludge modification medicament is any one or a few in lime carbonate, calcium hydroxide, calcium oxide, yellow soda ash, sodium bicarbonate, salt of wormwood, sodium hydroxide, potassium hydroxide, calcium chloride or the magnesium chloride.
6. environment friendly sludge water-coal-slurry according to claim 1 is characterized in that, particle diameter accounts for (weight) more than 80% less than 0.06 millimeter particle in the described environment friendly sludge water-coal-slurry.
7. environment friendly sludge water-coal-slurry according to claim 1 is characterized in that the mol ratio of calcium and sulphur is greater than 2 in the described environment friendly sludge water-coal-slurry.
8. according to the preparation method of each described environment friendly sludge water-coal-slurry of claim 1～7, it is characterized in that, comprise the steps:
Suitable quantity of water, sludge from wastewater treatment plant mixed with the sludge modification medicament and stir or the short period of time grinds, and make that the mud granule is broken to get final product, modified sewage sludge;
Above-mentioned modified sewage sludge, water, fine breeze, additive and sweetening agent mixed and stir or the short period of time is ground pulping, the particle diameter that makes solid particulate promptly obtains said environment friendly sludge water-coal-slurry less than 0.5 millimeter.
9. according to the preparation method of each described environment friendly sludge water-coal-slurry of claim 1～7, it is characterized in that, comprise the steps:
With suitable quantity of water, coal, additive and partly or entirely sweetening agent be added in and be mixed together, grind, make the coal water slurry of not adding stablizer;
Suitable quantity of water, sludge from wastewater treatment plant, sludge modification medicament and an amount of sweetening agent are mixed, stir or the short period of time grinds, and make that the mud granule is broken to get final product, modified sewage sludge;
Above-mentioned coal water slurry, modified sewage sludge mixed and stir or the short period of time is ground pulping, the particle diameter that makes solid particulate promptly obtains said environment friendly sludge water-coal-slurry less than 0.5 millimeter.
10. according to the preparation method of each described environment friendly sludge water-coal-slurry of claim 1～7, it is characterized in that, comprise the steps:
With suitable quantity of water, coal and partly or entirely additive be added in and be mixed together, grind, make the coal water slurry of not adding stablizer;
With suitable quantity of water, sludge from wastewater treatment plant, sludge modification medicament and partly or entirely sweetening agent mix, stir or the short period of time grinds, and make that the mud granule is broken to get final product, modified sewage sludge;
Above-mentioned coal water slurry, modified sewage sludge, water, an amount of sweetening agent and an amount of additive mixed and stir or the short period of time is ground pulping, the particle diameter that makes solid particulate promptly obtains said environment friendly sludge water-coal-slurry less than 0.5 millimeter.
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Cited By (12)
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| CN102191085A (en) * | 2010-03-04 | 2011-09-21 | 北京中矿环保科技股份有限公司 | Method for using sludge to produce coal gas |
| CN102649683A (en) * | 2012-03-26 | 2012-08-29 | 山西阳煤丰喜肥业(集团)有限责任公司 | Method for producing methanol by combined gasification of lurgi gasification wastewater through treatment of coal water slurry furnace |
| US20120296147A1 (en) * | 2011-05-16 | 2012-11-22 | Jason Swearingen | Treatment Apparatus and Methods |
| CN102977954A (en) * | 2012-12-10 | 2013-03-20 | 贵州金赤化工有限责任公司 | Low-ash fusion point anthracitic water-coal slurry for coal gasification and preparation method thereof |
| CN103146453A (en) * | 2013-04-03 | 2013-06-12 | 广西柳州发电有限责任公司 | Preparation process of sludge electrical coal |
| CN103450958A (en) * | 2013-09-05 | 2013-12-18 | 江苏省交通规划设计院股份有限公司 | Denitration sludge coal slurry and method for denitration by using same |
| CN103613362A (en) * | 2013-11-20 | 2014-03-05 | 广东电网公司电力科学研究院 | Light brick and preparation method thereof |
| CN104250060A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Biochemical sludge processing method |
| CN104789286A (en) * | 2014-01-22 | 2015-07-22 | 青岛特利尔环保锅炉工程有限公司 | Desulphurizing and denitrating composite carbon slurry |
| CN106396627A (en) * | 2016-09-19 | 2017-02-15 | 曹树梁 | Hazardous waste sludge or solid waste sludge liquidation and homogenization method |
| CN110628480A (en) * | 2019-10-14 | 2019-12-31 | 宋合富 | Method for preparing combustible sludge through municipal sludge and fire coal |
| US10647045B1 (en) | 2016-11-03 | 2020-05-12 | Specialty Earth Sciences, Llc | Shaped or sized encapsulated reactant and method of making |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102191085A (en) * | 2010-03-04 | 2011-09-21 | 北京中矿环保科技股份有限公司 | Method for using sludge to produce coal gas |
| US20120296147A1 (en) * | 2011-05-16 | 2012-11-22 | Jason Swearingen | Treatment Apparatus and Methods |
| US20120292254A1 (en) * | 2011-05-16 | 2012-11-22 | Jason Swearingen | Treatment Apparatus and Methods |
| CN102649683B (en) * | 2012-03-26 | 2014-08-13 | 山西阳煤丰喜肥业(集团)有限责任公司 | Method for producing methanol by combined gasification of lurgi gasification wastewater through treatment of coal water slurry furnace |
| CN102649683A (en) * | 2012-03-26 | 2012-08-29 | 山西阳煤丰喜肥业(集团)有限责任公司 | Method for producing methanol by combined gasification of lurgi gasification wastewater through treatment of coal water slurry furnace |
| CN102977954A (en) * | 2012-12-10 | 2013-03-20 | 贵州金赤化工有限责任公司 | Low-ash fusion point anthracitic water-coal slurry for coal gasification and preparation method thereof |
| CN103146453A (en) * | 2013-04-03 | 2013-06-12 | 广西柳州发电有限责任公司 | Preparation process of sludge electrical coal |
| CN103146453B (en) * | 2013-04-03 | 2014-08-20 | 广西柳州发电有限责任公司 | Preparation process of sludge electrical coal |
| CN104250060A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Biochemical sludge processing method |
| CN103450958A (en) * | 2013-09-05 | 2013-12-18 | 江苏省交通规划设计院股份有限公司 | Denitration sludge coal slurry and method for denitration by using same |
| CN103613362A (en) * | 2013-11-20 | 2014-03-05 | 广东电网公司电力科学研究院 | Light brick and preparation method thereof |
| CN103613362B (en) * | 2013-11-20 | 2015-01-21 | 广东电网公司电力科学研究院 | Light brick and preparation method thereof |
| CN104789286A (en) * | 2014-01-22 | 2015-07-22 | 青岛特利尔环保锅炉工程有限公司 | Desulphurizing and denitrating composite carbon slurry |
| CN106396627A (en) * | 2016-09-19 | 2017-02-15 | 曹树梁 | Hazardous waste sludge or solid waste sludge liquidation and homogenization method |
| US10647045B1 (en) | 2016-11-03 | 2020-05-12 | Specialty Earth Sciences, Llc | Shaped or sized encapsulated reactant and method of making |
| CN110628480A (en) * | 2019-10-14 | 2019-12-31 | 宋合富 | Method for preparing combustible sludge through municipal sludge and fire coal |
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Application publication date: 20091216 |