CN101191617A - Mixing burning method for farming and forestry castoff and sludge or sewage - Google Patents
Mixing burning method for farming and forestry castoff and sludge or sewage Download PDFInfo
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- CN101191617A CN101191617A CNA2006101549651A CN200610154965A CN101191617A CN 101191617 A CN101191617 A CN 101191617A CN A2006101549651 A CNA2006101549651 A CN A2006101549651A CN 200610154965 A CN200610154965 A CN 200610154965A CN 101191617 A CN101191617 A CN 101191617A
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Abstract
The invention relates to a method for mixing and combusting agricultural and forest waste, and mud or sewage. The method is that: the agricultural and forest waste is mixed with the mud or the sewage with the mass ratio of 1:2-2:1 after being crashed to dead small, and the mixture is fed into a combustion chamber for combusting, tail gas which is generated after combustion is discharged after treatment. The invention has the advantages of convenient operation, low cost and excellent treatment effect.
Description
Technical field
The present invention relates to a kind of agriculture and forestry organic waste material and mud or sewage treatment field.
Background technology
Since the mankind had civilization, faggot (biomass energy) is used for heating up water and cooks was the fact that everyone knows about it.Just since nearly half a century, the develop rapidly of science and technology makes coal, oil, natural gas obtain using widely, and for the town dweller, biomass energy is owing to using the inconvenient people's sight line of fading out.The agricultural crop straw original work are life fuel, animal feed, can still do the animal feed except part at present, and the overwhelming majority is by open incineration, and a large amount of smog of generation are not only a large amount of energy of waste, go back the severe contamination air, influence visibility.The annual stalk resource of China can the acquisition amount be 700,000,000 tons, add (being referred to as agriculture and forestry organic waste material) such as skin, core, shell nuclear, various wormwood and the wood chip of branch, leaf and the fruit of the trees that in the past can not utilize, sugared slags again, total amount can reach nearly 2,000,000,000 tons, is equivalent to 1,000,000,000 tons of standard coals.
Mud output in sewage disposal process is very huge, and according to incompletely statistics, based on the sewage treatment process of activated sludge process, its mud generation is 0.3%～0.5% (in a moisture content 97%) of sewage load, and quantity is very surprising.The mud of discharging from sewage treatment plant generally is a kind of loose, water content is at the glue-dissolving shape lotion thing of 95%-99%, have light specific gravity, bulky (be contained solids volume tens of times), thixotropy strong (being difficult for dehydration), have outside the physics and chemistry characteristics of very easily corrupt stench, all kinds of sewage are through handling, pollutants in sewage is almost all transferred in the mud, also enrichment pathogen and a large amount of high concentrations, persistence organic toxic noxious pollutant.The landfill that adopts and agricultural has had a strong impact on the face of land, groundwater environment at present, causes serious secondary pollution.At following 50 years, the most of population of China will focus on the above cities and towns of ten thousand people, and the sewage that is produced is all handled, and will produce mud every year more than 200,000,000 tons.This numeral also is the mud of municipal sewage plant.Remove in addition, the sewage-farm (station) of providing for oneself of factory and enterprise also produces the bigger industrial sludge of environmental hazard.Thereby the processing of mud has become an instant municipal works difficult problem.
To reach mud decrement be way the most completely by burning, and the advantage of dehydrated incineration method is that to burn the residue that produces few, and the lime-ash free from extraneous odour after burning; But the investment of the dedicated treatment facility of anhydration and incineration is huge, energy-output ratio is big, even the mud that sewage treatment plant produces passes through mechanical dehydration, moisture content is also between 75%～85%, show that according to experiment and calculating the external energy that the mud of moisture content 75%～85% will be needed by mummification is much larger than energy that sludge incineration produced.Running expense is high, and the expense of sludge anhydration burning is more than 400 yuan/ton.
The recirculating fluidized bed combustion system flow process is simple, there is not the required complicated pulverized coal preparation system of coal-powder boiler burning, as coal pulverizer, Powder discharging fan, thick, fines segregation device etc., there is not the required fire grate of chain furnace to go into conveyer yet, the subsidiary engine equipment of combustion system operations staff's operation is few, control is simple, special advantages is arranged aspect inferior fuel and the pollutant control using.And the desulfurized effect with less expensive is for the comprehensive utilization of lime-ash provides advantage.The lime-ash of recirculating fluidized bed can be made the building materials admixture, can be widely used in cement industry, the brickmaking industry.
Recirculating fluidized bed has higher efficiency of combustion, it is present clean coal combustion technology the most ripe and commercial applications, its unique design makes the fuel as the coal dust to flow in air, fuel just can better contact with ambient air like this, make burning more abundant, using combustible low-calorific-value anthracite, soft coal, slag, spoil, house refuse, trade waste etc.The more important thing is with traditional boiler and compare that it is many that COx that it discharges and NOx will lack.
CFBB is just becoming the topmost production equipment of steam power plant.Chinese Government has proposed a new legislation, all small-sized power plant (less than 200MW) of positive closing, the CFBB unless these factories migrate.Its objective is the acquisition economic benefit, reduce air pollution simultaneously.
Summary of the invention
The method that the agriculture and forestry organic waste material that technical problem to be solved by this invention provides that a kind of cost is low, effect is remarkable, easy enforcement is handled and mud or sewage mixed burning are handled, it is suitable carries out burning disposal to mud or difficult high concentration organic poisonous wastewater.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: the method that a kind of agriculture and forestry organic waste material and mud or sewage mixed burning are handled, it is characterized in that agriculture and forestry organic waste material after being crushed to smalls and mud or sewage mixed with mass ratio in 1: 2～2: 1, sends in the combustion chamber and burn.
As preferably, described agriculture and forestry organic waste material is an agricultural crop straw, the skin of the branch of trees, leaf and fruit, core, shell nuclear, various wormwood, wood chip, sugared slag or vegetable material etc.
As preferably, described mud is that municipal sewage plant or factory and enterprise are provided the mud that the sewage-farm produces for oneself, and sewage is meant the difficult industrial wastewater of high concentration organic toxic.
Improve, described agriculture and forestry organic waste material smalls is pulverized after drying again, and granularity is the following scope of particle diameter 2mm.
As preferably, the agriculture and forestry organic waste material smalls after described drying is pulverized is 1: 1 with the mixing quality ratio of mud or sewage.
As improvement, in order to adapt to big treating capacity, need at a high speed, mix efficiently, the present invention can be implemented easily, the principle of using fan is designed can continuous feed and the mixer of discharging, effectively mixes with mud or sewage after making the agriculture and forestry organic waste material drying be ground into smalls.
As improvement, described mixer on casing and below be respectively arranged with charging aperture and discharging opening, horizontal distribution has a plurality of cavitys in the casing simultaneously, cavity is interconnected at sidepiece, be provided with horizontal rotating shaft in the centre, be distributed with a plurality of paddles in each rotating shaft successively, rotating shaft is connected with the output shaft of the gearbox of casing sidepiece, and the power shaft of gearbox is connected with motor.Simple and reasonable like this, manipulate easily.
At last, described combustion chamber is meant that all can be the device that fuel burns with coal.The drying of described agriculture and forestry organic waste material is to dry by common Exposure to Sunlight or through the waste heat of boiler or incinerator.
Compared with prior art, the invention has the advantages that: be that the smalls after the drying and crushing has good absorption sewage ability, as external energy burning sludge or sewage good operability is just arranged because agriculture and forestry organic waste material is very cheap.Because only need the smalls after the agriculture and forestry organic waste material drying is pulverized be mixed with sewage or high water-containing sludge by very simple mixing arrangement, become the aqueous particulate thing after the mixing, can go up at the equipment (needn't reequip) of all former fire coals in theory and implement to burn, so investment seldom.
The present invention's implementation result on the existing CFBB of steam power plant is better, because of agriculture and forestry organic waste material character meta-alkalescence, can absorb sulfur-containing compound and other acidic materials in the mud when burning, and reduces SO
2, NO
xDischarging, thereby more help environmental protection.And the residue of agriculture and forestry organic waste material, mud and coal behind the process burning electricity generation can be used to produce light building material, can realize that again mud and sewage obtain the final goal of thorough harmless treatment.
The agriculture and forestry organic waste material of the present invention by being dried and crushed into smalls become moisture higher particle with after mud or sewage mix, and the transportation of being more convenient for has solved the problem that mud is difficult to transport again.
After the agriculture and forestry organic waste material drying is ground into smalls (particle diameter ￠ 2mm is following), its calorific value is about 3500 kilocalorie/kilograms, burn the calorific value that sewage or high water-containing sludge consumed and be approximately 620 kilocalorie/kilograms, the agriculture and forestry organic waste material powder mixes by the screw feeder governing system with 1: 1 weight ratio with mud (or sewage) sends into power plant's CFBB.In more than 900 degrees centigrade boiler, utilize the characteristic of circulating combustion, sewage or high water-containing sludge are thoroughly burned, can generate electricity, can get rid of again the secondary pollution of mud, be used for generating if little thermal power plant adopts the present invention that the alternative coal of agriculture and forestry organic waste material is acted as a fuel, as long as technical finesse is proper, generating set can normally move, to not only not influence of environment, and thoroughly solved the Treatment of Sludge difficult problem that all sewage treatment plants produced.Also to increasing farmers' income, further transfer the enthusiasm of peasant planting crops and bring long-range influence simultaneously.To become the energy-conserving and environment-protective project of the maximum project of supporting agriculture of China, maximum like this, also be the renewable energy source item that the rapid large tracts of land of China's most probable is promoted.
Total the above, the present invention has solved with the simplest method to be difficult to mud and the unmanageable sewage (particularly high concentration organic poisonous wastewater) handled for many years, obtained operation easily, advantage such as cost is very low, treatment effect is fabulous.Also make agriculture and forestry organic waste material that excellent usage has been arranged, also just make agriculture and forestry organic waste material all occupy important position at environmental protection, renewable energy source domain.
Description of drawings
Fig. 1 is the mixer sectional side view;
Fig. 2 is the mixer orthogonal view;
Fig. 3 is the burning electricity generation system diagram.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 1 and Figure 2, mixer is a flabellum by blade mainly, and casing 1.1, gearbox 2.3 constitute with motor 2.4.Mixer on casing 1.1 and below be respectively arranged with charging aperture 2.1 and discharging opening 2.5, horizontal distribution has a plurality of cavitys in the casing simultaneously, cavity is interconnected at sidepiece, be provided with horizontal rotating shaft 1.2 in the centre, be distributed with a plurality of paddles 2.2 in each rotating shaft successively, rotating shaft is connected with the output shaft of the gearbox 2.3 of casing sidepiece, and the power shaft of gearbox 2.3 is connected with motor 2.4.
Smalls after the agriculture and forestry organic waste material drying and crushing (its particle diameter ￠ 2mm is following), pressing mass ratio 1: 1 with sewage or high aqueous fluid matter sludge adds from mixer charging aperture 2.1, under 2.2 mixing of blade flabellum and promotion of high speed rotating, material from left to right arrives the lower floor blade again to be mixed and promotes by the right side to left and can guarantee effective mixing to mixer discharging opening 2.5.Agriculture and forestry organic waste material that the mixer discharging opening comes out and sewage or high water-containing sludge hybrid particles are sent into power plant's recirculating fluidized bed burner hearth 3.3 by double helix feed governing system 3.1 again and are burned, the following position of recirculating fluidized bed burner hearth is provided with igniter and air intlet 3.2, and the heat that burns gained produces steam steam supply turbine generator group 3.6 by waste heat boiler 3.4 and is converted into electric energy; The flue gas that waste heat boiler comes out is via electrostatic precipitator 3.7, and ash content enters grey storehouse 3.5, and waste gas enters atmosphere via heavy metal absorption tower 3.8 to chimney 3.9.
Show by test: agriculture and forestry organic waste material powder after the drying and crushing and sewage mass ratio surpass 2: 1 and promptly contain the agriculture and forestry organic waste material mass ratio greater than about 70% o'clock, play dirt and contaminated environment easily when transportation or conveying, promptly contain the agriculture and forestry organic waste material mass ratio less than about 30% o'clock and be lower than 1: 2, the mixture water content is too high, so that calorific value is too low, be unfavorable for burning.So optimum quality ratio is 1: 1.
Realize that the object of the invention method is: earlier with the agriculture and forestry organic waste material drying and crushing to smalls (below particle diameter ￠ 2mm), be that 75%～100% mud or the difficult organic wastewater of high concentration are delivered in the circulating fluidized bed combustor through mixer mixed (or mixing with coal) with 2: 1～1: 2 after again and burn with moisture mass ratio; The tail gas that produces discharges after treatment.
Claims (9)
1. the method handled of agriculture and forestry organic waste material and mud or sewage mixed burning is characterized in that agriculture and forestry organic waste material after being crushed to smalls and mud or sewage mixed with mass ratio in 1: 2～2: 1, sends in the combustion chamber and burn.
2. method according to claim 1 is characterized in that described agriculture and forestry organic waste material is skin, core, shell nuclear, various wormwood, wood chip, sugared slag or the vegetable material of branch, leaf and the fruit of agricultural crop straw, trees.
3. method according to claim 1 is characterized in that described mud or sewage are that municipal sewage plant or factory and enterprise are provided the mud that the sewage-farm produces for oneself, and sewage is meant the difficult industrial wastewater of high concentration organic toxic.
4. method according to claim 1 is characterized in that described agriculture and forestry organic waste material smalls pulverizes after drying, and granularity is the following scope of particle diameter 2mm.
5. according to any described method of claim of claim 1 to 4, it is characterized in that the mixing quality ratio of agriculture and forestry organic waste material smalls and mud or sewage after described drying is pulverized is 1: 1.
6. method according to claim 1 is characterized in that described combustion chamber is meant that all can be the device that fuel burns with coal.
7. method according to claim 5 is characterized in that described mixing is to be finished by a kind of energy continuous feed of using the design of fan principle and the mixer of discharging.
8. method according to claim 5, the drying that it is characterized in that described agriculture and forestry organic waste material are to dry by common Exposure to Sunlight or through the waste heat of boiler or incinerator.
9. method according to claim 7, it is characterized in that described mixer on casing and below be respectively arranged with charging aperture and discharging opening, horizontal distribution has a plurality of cavitys in the casing simultaneously, cavity is interconnected at sidepiece, be provided with horizontal rotating shaft in the centre, be distributed with a plurality of paddles in each rotating shaft successively, rotating shaft is connected with the output shaft of the gearbox of casing sidepiece, and the power shaft of gearbox is connected with motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101549651A CN101191617A (en) | 2006-12-01 | 2006-12-01 | Mixing burning method for farming and forestry castoff and sludge or sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101549651A CN101191617A (en) | 2006-12-01 | 2006-12-01 | Mixing burning method for farming and forestry castoff and sludge or sewage |
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| CN101191617A true CN101191617A (en) | 2008-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101549651A Pending CN101191617A (en) | 2006-12-01 | 2006-12-01 | Mixing burning method for farming and forestry castoff and sludge or sewage |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101503643B (en) * | 2009-03-09 | 2012-12-12 | 上海同济科学技术开发有限公司 | Solid fuel for sludge anhydration |
| CN106224978A (en) * | 2016-07-08 | 2016-12-14 | 重庆文渠环保科技有限公司 | Utilize the method and device of chamber type sintering all kinds of mud of technology harmlessness disposing |
| CN107366913A (en) * | 2017-07-07 | 2017-11-21 | 南京福昌环保有限公司 | A kind of compatibility processing method based on incineration of waste |
| CN110028995A (en) * | 2019-04-25 | 2019-07-19 | 梅丽中 | A kind of alkaline biological particles and special equipment for incineration disposal organic liquid waste |
| CN110056879A (en) * | 2019-04-25 | 2019-07-26 | 梅丽中 | A kind of biological particles and special equipment for incineration disposal organic liquid waste |
| CN110056878A (en) * | 2019-04-25 | 2019-07-26 | 梅丽中 | A kind of device of biomass incineration disposal organic liquid waste |
-
2006
- 2006-12-01 CN CNA2006101549651A patent/CN101191617A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101503643B (en) * | 2009-03-09 | 2012-12-12 | 上海同济科学技术开发有限公司 | Solid fuel for sludge anhydration |
| CN106224978A (en) * | 2016-07-08 | 2016-12-14 | 重庆文渠环保科技有限公司 | Utilize the method and device of chamber type sintering all kinds of mud of technology harmlessness disposing |
| CN107366913A (en) * | 2017-07-07 | 2017-11-21 | 南京福昌环保有限公司 | A kind of compatibility processing method based on incineration of waste |
| CN110028995A (en) * | 2019-04-25 | 2019-07-19 | 梅丽中 | A kind of alkaline biological particles and special equipment for incineration disposal organic liquid waste |
| CN110056879A (en) * | 2019-04-25 | 2019-07-26 | 梅丽中 | A kind of biological particles and special equipment for incineration disposal organic liquid waste |
| CN110056878A (en) * | 2019-04-25 | 2019-07-26 | 梅丽中 | A kind of device of biomass incineration disposal organic liquid waste |
| CN110056878B (en) * | 2019-04-25 | 2021-04-20 | 安徽燃博智能科技有限公司 | Device for treating organic waste liquid by biomass incineration |
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