CN101603691B - Biomass coal-water slurry prepared by waste leachate and domestic sludge and preparation process thereof - Google Patents
Biomass coal-water slurry prepared by waste leachate and domestic sludge and preparation process thereof Download PDFInfo
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- CN101603691B CN101603691B CN2009100402282A CN200910040228A CN101603691B CN 101603691 B CN101603691 B CN 101603691B CN 2009100402282 A CN2009100402282 A CN 2009100402282A CN 200910040228 A CN200910040228 A CN 200910040228A CN 101603691 B CN101603691 B CN 101603691B
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Abstract
The invention discloses biomass coal-water slurry prepared by waste leachate and domestic sludge and a preparation process thereof, aiming to provide biomass coal-water slurry with low cost which combines the energy-saving and emission-reducing with environment management and a preparation method thereof. The invention adopts coal, domestic sludge, waste leachate and additives as raw materials toprepare the biomass coal-water slurry which can replace fuel for use by mixing, grinding, homogenizing and filtrating the raw materials, thus saving energy effectively, reducing cost greatly, realizing good management function on the urban environment and reaching the aims of promoting the economic and environmental health and sustainable development. The invention can be widely used in the fields of fuel replace burning for industrial boilers, power station boilers and industrial furnace, the field of urban environmental management and the like.
Description
Technical field
The present invention relates to a kind of water-coal-slurry, relate in particular to the biomass coal-water slurry and the preparation technology thereof of a kind of garbage leachate and domestic sludge preparation.
Background technology
Water-coal-slurry is a kind of novel coal based fluid fuel, it is the important branch of world today's clean coal technology, compare with traditional coal fuel, can make coal burning more abundant, more complete by COAL-WATER SLURRY TECHNOLOGY, thus have low pollute, efficient, energy-conservation, outstanding advantage that operating cost is low.The water-coal-slurry outer appearnce is like heavy oil, and it consists of " coal+water+chemical addition agent ", and it has good stable and rheological characteristic, is easy to the burning of loading and unloading, storage, pipeline conveying and atomizing and fluidized suspension.Water coal slurry combusting technology is a coal clean combustion technology, is widely used in the replacing oil combustion of Industrial Boiler, station boiler, Industrial Stoves.Alternative 1 ton of heavy oil of water-coal-slurry about 2～3 tons or diesel oil and efficiency of combustion reach the fuel oil peer-level greater than 98%.As everyone knows, close getting in touch, particularly fuel energy that the utilization of the energy and environmental protection have are serious day by day to environment damage, and society is coordinated in order to make, sustainable development, and people are more and more higher to energy-conservation, reduction of discharging, the environmental protection instructions for use of fuel energy.Its raw material of existing water-coal-slurry need consume a large amount of coal resources and water resource, and coal and water all are traditional precious resources, and input cost is higher in process of production to cause existing water-coal-slurry thus, is unfavorable for further developing of water-coal-slurry clean coal technology; For this reason, existing water-coal-slurry must obtain technically and bigger improve and break through the instructions for use that just can better meet energy-conservation, reduction of discharging of New Times, environmental protection.
Urban refuse pollution is another difficult problem of environmental problem.Along with growth in the living standard, the garbage leachate that municipal refuse quantity, urban wastewater discharge rapid growth, the processing of the sewage process sewage treatment plant of city discharging produce a large amount of organic sludges and refuse landfill generation has become environmental problem that the city is badly in need of solving, that give prominence to; The domestic sludge processing method that city domestic sewage treatment plant produces has three kinds at present: the one, and deliver to refuse landfill and carry out direct landfill; The 2nd, be cured the back landfill; The 3rd, anhydration and incineration.Wherein be cured the back landfill and the anhydration and incineration processing cost is high, the investment is huge, technical difficulty height, and its processing method can not fundamentally solve the pollution to environment such as bioxin, heavy metal; And if adopt the method for direct landfill without any processing, effect extreme difference then, because the moisture that the mud after the dehydration still contains about 70% is difficult for removing, therefore take bigger refuse landfill storage capacity, and produce new pollution problem, producing pernicious gases such as De bioxin, methane can't eliminate, simultaneously because the landfill of mud also brings the other problems such as instability of level of sedimentation in the reservoir area, cause some city domestic sewage treatment plant start-stops to stop, dare not operate at full capacity, municipal sludge, effluent problem can not get effective solution.
In addition, in the landfill process of city dirt and rubbish, because the effect of composite factors such as the decomposition of rubbish and precipitation, surface water, groundwater seepage, irrigation, liquid debris has produced garbage leachate.Garbage leachate is to be generated by all cpds and the rotten material of macerating, contain BOD, COD, nitrogen-containing compound, organohalogen compounds and sulfide, inorganic salts of very high concentrations etc., breath malodor not only, and wherein much be carcinogenic substance, if the discharging face of land, contaminated environment; Dissolve in undergroundly, polluted source is a harm greatly of urban environment and health, and the garbage loading embeading time is of a specified duration more, and its concentration of oozing drop liquid is just high more, harm is big more.In present applied garbage leachate processing technique, most of bioanalysis that adopts is handled, but because COD is generally about 10000-20000mg/l in the garbage leachate, suspension, ammonia nitrogen concentration are also quite high simultaneously.The investment operating cost that drop liquid is oozed in present disposal of refuse is high.On the other hand, because BOD/COD ratio is low in the garbage leachate, biodegradability is poor, and biological treatment efficient is not high.After the landfill yard landfill time limit reaches certain hour, the water quality of garbage leachate will change a lot, and ooze drop liquid biodegradability and will become poorer, COD concentration is higher, and in this case, biological bacteria can't adapt to, and finally causing whole death, the entire process system falls flat.Run into the season of raining, the percolate of refuse landfill effluxes in a large number, flows into urban pipe network, and is seriously polluted to city integral body.
Country has carried out standard modification in 2008 to refuse landfill, requires the percolate concentration of emission below 100mg/L, has increased percolate investment and operating cost especially.Therefore, the processing of percolate must be sought new outlet.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, and the biomass coal-water slurry and the preparation technology thereof of a kind of energy-saving and emission-reduction garbage leachate that combine with environmental improvement, that cost is low and domestic sludge preparation is provided.
The technical scheme that biomass coal-water slurry adopted of garbage leachate of the present invention and domestic sludge preparation is: by weight percentage, the biomass coal-water slurry of described garbage leachate and domestic sludge preparation comprises following component:
Coal 35%～48% domestic sludge 10%～20%
Garbage leachate 35%～50% additive 0.3%～0.5%.
Described additive comprises dispersant and stabilizing agent.
By weight percentage, the biomass coal-water slurry of described garbage leachate and domestic sludge preparation comprises following component:
Coal 40% domestic sludge 20%
Garbage leachate 39.7% additive 0.3%.
The technical scheme that preparation technology adopted that garbage leachate of the present invention and domestic sludge prepare biomass coal-water slurry is: coal, the domestic sludge of required deal are delivered in the feeding mechanism, metering simultaneously adds garbage leachate and additive mixes, carrying out one-level then pulverizes, after one-level is pulverized, metering adds described additive and carries out secondary and pulverize once more, enters balancing reservoir then, filters through filter after the homogenizing, obtain the finished product water-coal-slurry after the filtration, the storage tank of packing into.
Described one-level is pulverized and is adopted tumbling mill to grind; Described secondary is pulverized and is adopted planet mill to grind.In actual applications, described one-level pulverizing, secondary are pulverized and also can be adopted other grinding machines.
The invention has the beneficial effects as follows: garbage leachate of the present invention and domestic sludge prepare biomass coal-water slurry and have effectively utilized garbage leachate and the domestic sludge raw materials for production as biomass coal-water slurry, avoided utilizing in a large number in the existing water-coal-slurry coal and precious resources such as water as the situation of raw material, thereby effectively reduce degree of dependence to traditional resources such as coal, water.Can save coal resources about 20% and about 40% water resource than light water coal slurry, realize the purpose that reduces production costs significantly.
The ash content of biomass coal-water slurry generally is not more than 6%, and therefore the waste residue of burning back generation is few, in addition because the main component in the waste residue is SiO
2(about 70%) is good building material therefore, can directly be used as building materials ceramic raw material or non-burning brick raw material.Biomass coal-water slurry does not have waste water, discharging wastes in whole process of production, reaches the purpose of zero-emission.
Biomass coal-water slurry is as clean type fuel, and alternative industrial fuel oil enters the use that acts as a fuel of industrial energy market, is a kind of good resource product.Simultaneously greatly dynamics impels municipal sludge and garbage leachate to handle maximum minimizing, efficiently solve handle domestic sludge and garbage leachate for a long time can not fine decrement and have only input, can not effectively reach the situation of recycling.And utilize biomass coal-water slurry technical finesse domestic sludge, no longer take storage capacity such as refuse landfill, prolonged refuse landfill service life to a certain extent, alleviated the intractability and the pressure of refuse landfill greatly.
In sum, utilize municipal sludge, garbage leachate to make the biomass coal-water slurry of raw material, solved the production raw material problems of biomass coal-water slurry on the one hand, reduced the production cost of water-coal-slurry, solved again urban environmental protection in handling hard nut to crack and the energy cost of enterprise hold not inferior problem high, make city " three wastes " recycling farthest, reach recycling economy, energy-conserving and emission-cutting technology purpose, thereby have good ecological benefits, social benefit and economic benefit.
In the biomass coal-water slurry pulping process, humic acid substance in the described garbage leachate helps the further dispersion of coal particle in the water-coal-slurry and stablizes, therefore, but adopt garbage leachate to substitute not only conserve water resource of light water, can also promote and improve Flowing Deformation Character of Water-gas Pulp and reach the use amount that reduces slurries additive agent to a certain extent, further reduce the preparation cost of water-coal-slurry.
Garbage leachate of the present invention and domestic sludge prepare among the preparation technology of biomass coal-water slurry, adopt multistage pulverizing to grind, and utilize tumbling mill to combine with planet mill, guarantee that various raw materials fully mix, and obtain sizeable grating.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Embodiment one:
The biomass coal-water slurry of garbage leachate of the present invention and domestic sludge preparation, by weight percentage, it comprises following component:
Coal 40% domestic sludge 20%
Garbage leachate 39.7% additive 0.3%.
The preparation technology of the biomass coal-water slurry of above-mentioned garbage leachate and domestic sludge preparation is: coal, the domestic sludge of above-mentioned degree are delivered in the feeding mechanism, add garbage leachate by computer meter match system metering simultaneously and additive mixes, carrying out one-level by tumbling mill then grinds, after one-level is pulverized, metering adds described additive and carries out secondary through planetary mill and grinds once more, enter balancing reservoir then, filter through filter after the homogenizing, obtain the finished product water-coal-slurry after the filtration, the storage tank of packing into.
The tumbling mill that described one-level is pulverized is the configurations of 2 cabins, the coarse crushing work of undertaking material to be processed, and 15～20 tons/hour of described tumbling mill production capacity, installed capacity 250Kw, feed size 0～10mm slightly starches granularity 50 orders.
The planetary mill that described secondary is pulverized makes abrasive body produces in the cabin centrifugal force by planetary motion to take place between the abrasive body rubbing with the hands, reach the ultra-fine grinding processing of material to be processed, 15～20 tons/hour of described planetary mill production capacity, installed capacity 180Kw, feed size 0～3mm, screened stock granularity 200 mesh screen residues are less than 15%.
In the present embodiment, described additive is dispersant and stabilizing agent, and coal is a kind of complex composite thing that is made of organic matter, and is relatively poor with the interface compatibility of water, therefore is difficult in stable dispersion in the water.Biomass coal-water slurry is by dispersant certain particle size coal particle and mud granule to be scatter in garbage leachate uniformly, forms the fluid liquid material of homogeneous, i.e. biomass coal-water slurry.
Described dispersant is actually a kind of interface modifier, and its principle is to form a coating on the surface of each coal and mud granule, improves the compatibility of coal and water, and original coal/water termination tension force is replaced by biological coal water slurry dispersing agent/water termination tension force.This coating surface has 3 characteristics, and the one, increase particle surface electrically (charge stable), the 2nd, form steric restriction (steric stabilization) at particle surface.The 3rd, avoid particle near (free and stable), form intergranular even dispersion.At present, coal water slurry dispersing agent mainly contains humic acid series, naphthalene series, lignin series and macromolecule series etc.
For preventing the situation of bleed, soft precipitation and hard precipitation, in slurry, add stabilizing agent, add stabilizing agent in the slurry after, slurry presents vacation one in regularly and moulds state, but under the state that stirs, can recover the original rheological behavior of its slurry again, satisfy the requirement that stores and carry.
Embodiment two:
In the present embodiment, the biomass coal-water slurry of described garbage leachate and domestic sludge preparation, by weight percentage, it comprises following component:
Coal 42% domestic sludge 18%
Garbage leachate 20% additive 0.4%
Life industrial wastewater 19.6%.
Compare with embodiment one, added life industrial wastewater in this enforcement as the production supplementing water, described life industrial wastewater can be to produce flushing water, dining room waste water, sanitary sewage and rainwater.
The preparation technology of the biomass coal-water slurry of above-mentioned garbage leachate and domestic sludge preparation is: with the coal of above-mentioned degree, domestic sludge is delivered in the feeding mechanism, add garbage leachate by the metering of computer meter match system simultaneously, life industrial wastewater and additive mix, carrying out one-level by tumbling mill then grinds, after one-level is pulverized, metering adds described additive and carries out secondary through planetary mill and grinds once more, enter balancing reservoir then, filter through filter after the homogenizing, obtain the finished product water-coal-slurry after the filtration, the storage tank of packing into.Other features of this example are consistent with embodiment one.
The biomass coal-water slurry of producing in the foregoing description is when replacing fuel oil to use, for preventing particularly dioxins materials secondary pollution of harmful substance in the boiler smoke, in concrete the use, take following measure: the one, the abundant holdup time of maintenance burning gases (＞2S), the 2nd, keep suitable ignition temperature (＞850 ℃), the 3rd, make burning gases form disturbance, reaching gas fully mixes, realize completing combustion, suppress the generation of CO, be directly proportional with the value of CO with this generating capacity that reaches the generation (dioxins materials that suppresses dioxins materials), also reduced simultaneously the discharging of sulfur dioxide and nitrogen oxide, lime-ash after the burning can be used to making burn-free bricks, building materials ceramic raw material and cement etc. have been realized the environmental protection treatment and the comprehensive utilization of mud.
Claims (6)
1. the biomass coal-water slurry of garbage leachate and domestic sludge preparation, it is characterized in that: by weight percentage, the biomass coal-water slurry of described garbage leachate and domestic sludge preparation comprises following component:
Coal 35%～48% domestic sludge 10%～20%
Garbage leachate 35%～50% additive 0.3%～0.5%.
2. the biomass coal-water slurry of garbage leachate according to claim 1 and domestic sludge preparation, it is characterized in that: described additive comprises dispersant and stabilizing agent.
3. the biomass coal-water slurry of garbage leachate according to claim 1 and 2 and domestic sludge preparation is characterized in that: by weight percentage, the biomass coal-water slurry of described garbage leachate and domestic sludge preparation comprises following component:
Coal 40% domestic sludge 20%
Garbage leachate 39.7% additive 0.3%.
4. described garbage leachate of claim 1 and domestic sludge prepare the preparation technology of biomass coal-water slurry, it is characterized in that: coal, the domestic sludge of required deal are delivered in the feeding mechanism, metering simultaneously adds garbage leachate and additive mixes, carry out one-level then and pulverize, after one-level was pulverized, metering added described additive and carries out secondary and pulverize once more, enter balancing reservoir then, filter through filter after the homogenizing, obtain the finished product water-coal-slurry after the filtration, the storage tank of packing into.
5. prepare the preparation technology of biomass coal-water slurry according to the described garbage leachate of claim 4 and domestic sludge, it is characterized in that: described one-level is pulverized and is adopted tumbling mill to grind.
6. prepare the preparation technology of biomass coal-water slurry according to claim 4 or 5 described garbage leachates and domestic sludge, it is characterized in that: described secondary is pulverized and is adopted planetary mill to grind.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100402282A CN101603691B (en) | 2009-06-12 | 2009-06-12 | Biomass coal-water slurry prepared by waste leachate and domestic sludge and preparation process thereof |
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| CN2009100402282A CN101603691B (en) | 2009-06-12 | 2009-06-12 | Biomass coal-water slurry prepared by waste leachate and domestic sludge and preparation process thereof |
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| CN101603691B true CN101603691B (en) | 2011-09-14 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101787312B (en) * | 2010-02-08 | 2013-01-09 | 珠海中水环保科技有限公司 | Biochar pulp prepared from garbage leachate serving as raw material and preparation process thereof |
| CN102268306A (en) * | 2010-06-02 | 2011-12-07 | 深圳市赛尔勒环保科技有限公司 | Biomass fuel and technological process for processing the biomass fuel |
| CN101935555B (en) * | 2010-08-23 | 2013-05-01 | 东莞市飞龙达造纸设备有限公司 | Production process and equipment of one-component and multicomponent biomass solid and liquid fuels |
| CN102766494B (en) * | 2012-08-09 | 2016-05-25 | 泰安市良达新能源有限责任公司 | Brewing wastewater is prepared the technique of water-coal-slurry |
| CN103528049B (en) * | 2013-10-14 | 2016-02-10 | 上海交通大学 | The organic working medium boiler of living beings-water-coal-slurry multifuel combustion |
| CN107445234A (en) * | 2017-09-21 | 2017-12-08 | 曾勇 | A kind of leachate reeirculation atomization and vaporization system |
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Owner name: ZHUHAI JINSHI INVESTMENT CONSULTING CO., LTD. Free format text: FORMER OWNER: ZHANG WEIMING Effective date: 20100129 |
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