CN102269418B - Method for utilizing papermaking sludge to realize desulfuration, denitrification and coal conservation of circulating fluid bed - Google Patents
Method for utilizing papermaking sludge to realize desulfuration, denitrification and coal conservation of circulating fluid bed Download PDFInfo
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Abstract
The invention relates to a method for utilizing papermaking sludge to realize desulfuration, denitrification and coal conservation of a circulating fluid bed, and the method provided by the invention comprises the following steps: carrying out secondary dehydration on the papermaking sludge by virtue of an air and mechanical mode, manufacturing a strip form by virtue of a moulding machine, cutting into sections, and feeding the sections into the negative pressure area of a boiler, and burning the sections and coal in the hearth of the boiler; adding 110 kilos-140 kilos of sludge with the moisture content of 50% in one ton of coal; transferring generated waste water containing alkali liquor into a deinking workshop to a desulfuration circulating groove, and adding a devulcanizing agent (quicklime) and caustic soda flakes and mixing; feeding the mixture into a desulfurizing tower and performing neutralization reaction on the mixture and the acidic oxide in smoke; and adding 8 kilos-11 kilos of devulcanizing agent (quicklime) and 1 kilo-3 kilos of caustic soda flakes into a ton of coal; and carrying out the cyclic utilization, neutralization reaction, desulfuration and denitrification on the waste water containing alkali liquor, and then transferring the waste water with low PH value to a paper mill for recycling. In the method provided by the invention, the papermaking sludge and sewage are utilized as devulcanizing agents, thereby achieving the purpose of removing sulfide and nitride; and meanwhile, the papermaking sludge is taken as a fuel, thereby realizing energy conservation, emission reduction and waste recycle.
Description
Technical field
The present invention relates to method and the technology of a kind of environmental protection and energy saving and twice laid, relate in particular to a kind of method that paper mill sludge sewage is economized on coal for the circulating fluid bed boiler desulfurization denitrogenation.
Background technology
China's sulfur dioxide (SO2) emissions total amount occupies the first in the world, exceed atmospheric environment capacity 80%, China has implemented and has implemented that the flue gas desulfurization of large electric power plant generating set is many has adopted external core process packet technology, has so just greatly restricted further, the high-level development of Chinese desulfurization industry.Exploitation has the core technology of independent intellectual property right, proposes coal steam-electric plant smoke SO
2, NO
2The total solution that reduces discharging progressively realizes the domestic industry target, is the development plan that State Environmental Protection Administration and electric power authorities advocate all the time and support.Take as the leading factor with energy-conservation pollution treatment, exploitation sludge resource comprehensive utilization project is done energy saving desulfurizer with mud, is the revolution of Thermal Power Enterprises energy-saving and emission-reduction.Paper industry is important part in the national economy, and operations different in the paper production process can produce different types of waste material.Paper mill sludge is the end product of paper-making process wastewater treatment, except containing the short fiber material, also contains many basic anhydride.Also contain in addition the composition that heavy metal and parasitic ovum and pathogenic bacteria etc. are detrimental to health in the mud, must properly dispose.Burning method because can realize that it is innoxious, the peculiar advantage of minimizing and resource more and more is subject to people's attention.And adopt coal and discarded object multifuel combustion to generate electricity, utilizing simultaneously basic anhydride in the mud to carry out desulfurization will be a kind of good selection.Compare with pure burning discarded object, mixed combustion technique can keep flameholding to improve heat utilization efficiency, reduces atmosphere pollution, i.e. energy-conservation again reduction of discharging.Circulating fluidized bed technique is a kind of new and effective combustion technology with cleaning, bed storage and the recycle stock of its enormous amount, it is wide to make it have a fuel tolerance, it is stable to catch fire, mix strong, the characteristics such as burn thoroughly and pollutant discharge amount is little, so China's mixed combustion technique in recirculating fluidized bed at active development coal and solid waste just.Now existing is that raw material need to ooze the method that mixed fly ash in electric power plant prepares high-efficiency composite calcium based desulphurizing agent with paper mill sludge, in addition also useful papermaking wastewater waste residue to the method for fuel coal waste gas desulphurization, it selects the bi-material in four kinds of materials such as papermaking wastewater, waste residue, calcium lime powder and water to make alkaline slurry, described alkaline slurry atomisation and soot waste gas is fully contacted carry out desulfurization.In addition, also have directly after the paper mill sludge mummification balling-up, directly send into boiler and burn.Present most power plant all is the Wet Limestone that adopts/lime-gypsum method sulfur removal technology, mainly has following problems:
(1) installation desulphurization plant cost of investment is large.
(2) desulphurization plant, systematic running cost are with high.
(3) desulphurization plant, system engineering long-term operation poor performance, availability is low.
(4) desulfuration efficiency is low, and it is up to standard normally to move desulfurization at all.Steam generator system actual operation parameters and design load depart from too large, and desulfuration efficiency reduces, and do not reach desulfuration efficiency and the sulfur dioxide (SO2) emissions requirement up to standard of design at all.
(5) desulfurizer does not reach normal operation, application requirements.Install self application efficiency reduction, fouling, burn into wear and tear very seriously, seal the problems such as water leaks, the roots blower noise is large.
(6) produce secondary pollution (waste water calcium plaster) after the desulfurization.
Paper mill sludge is the disposal difficulties of paper industry always, also is a hard nut to crack that is perplexing for a long time domestic papermaking enterprise always.Paper mill sludge all was to send into sludge landfill to make landfill disposal after the dehydration of belt filter press in the past, and the moisture content after the sludge filtration is more than 70%, and annual Sludge landfill expense is very high, and this has not only increased the sludge treatment expense, also has secondary pollution.
Former circulating fluidized bed desulfur technology, need to use a large amount of desulfurizing agents, desulphurization cost is higher, the ratio of its sulfur content and desulfurizing agent CaO is: 1: 1.5, generally speaking, the ratio that sulfur content accounts for coal was 2%-3%, coal per ton need to add the quick lime desulfurizing agent: the 40-50 kilogram, China is an energy consumption big country, and the annual coal that consumes has reached about 3,000,000,000 tons, and the fire coal that is used for primary energy accounts for about 80% of total amount.The at present coal smoke type sulfur dioxide pollution of China is serious, and desulphurization cost is high, operating cost is large.
Summary of the invention
The purpose of this invention is to provide a kind of method that paper mill sludge sewage is economized on coal for the circulating fluid bed boiler desulfurization denitrogenation, with paper mill sludge as desulfurizing agent, to reach the purpose of removing sulfide and nitride, simultaneously again paper mill sludge is used as fuel, namely administered pollution, saved again the energy, the alkali lye waste water that contains that papermaking is produced is transported in the desulphurization circulating groove, with quick lime and the sheet alkali desulphurizer mixing that attached amount adds, reach the purpose that consumption reduction reduces discharging comprehensive utilization.
For achieving the above object, the technical solution used in the present invention is:
A kind of method that paper mill sludge sewage is economized on coal for the circulating fluid bed boiler desulfurization denitrogenation, it is characterized in that: with paper mill sludge, directly carry out the air pressurized processed, pressure is 1.0～1.3MPa, water content is down to 60%, carry out second dehydration with the mode of machinery pressurization again, its water content is down to below 50%, is in strip with shaping mechanism, diameter 6～9mm, be cut into again the bar section of 8～12mm with reamer, send into the coal supply negative pressuren zone of boiler, in boiler furnace, burn with coal; 110 kilograms～140 kilograms in the mud of one ton of coal admixture water content 50%; The alkali lye waste water that contains that utilizes the deinking workshop to produce is transported in the desulphurization circulating groove, attached amount adding desulfurizing agent quick lime and sheet alkali mix again, the acidic oxide that enters in desulfurizing tower and the flue gas carries out neutralization reaction, and one ton of coal more attached amount adds 1～3 kilogram in 8～11 kilograms of desulfurizing agent quick limes and sheet alkali; Contain alkali lye waste water through behind the recycling neutralization reaction desulfurization removing nitric, the waste water of low pH value is transmitted back between the water treatment vehicle in paper mill again and processes recycling.
According to described paper mill sludge sewage is used for the method that the circulating fluid bed boiler desulfurization denitrogenation is economized on coal, it is characterized in that: described the paper mill sludge of water content more than 70% directly carried out the air pressurized processed, sludge moisture content is down to below 60%, dewatering pressure is 1.3Mpa, carry out second dehydration with the mode of machinery pressurization again, its water content is down to below 50%, be in strip with shaping mechanism, diameter 8mm, be cut into again the bar section of 10mm with reamer, send into the coal supply negative pressuren zone of boiler, in boiler furnace, burn with coal; The mud 120 kg of one ton of coal desulfurization and denitrification proportioning water content 50%; The alkali lye waste water that contains that utilizes the deinking workshop to produce is transported in the desulphurization circulating groove, and attached amount adds desulfurizing agent quick lime and sheet alkali mixes again, and one ton of coal more attached amount adds 2 kilograms in 10 kilograms of desulfurizing agent quick limes and sheet alkali; Contain alkali lye waste water through behind the recycling neutralization reaction desulfurization removing nitric, the waste water of low pH value is transmitted back between the water treatment vehicle in paper mill again and processes recycling.
According to described paper mill sludge sewage is used for the method that the circulating fluid bed boiler desulfurization denitrogenation is economized on coal, it is characterized in that: paper mill sludge is directly carried out the air pressurized processed, sludge moisture content is by being down to more than 70% below 60%, dewatering pressure is 1.3Mpa, carry out second dehydration with the mode of machinery pressurization again, its water content is down to below 50%, be in strip with shaping mechanism, diameter 8mm, be cut into again the bar section of 10mm with reamer, send into the coal supply negative pressuren zone of boiler, in boiler furnace, burn with coal; 140 kilograms in the mud of one ton of coal desulfurization and denitrification proportioning water content 50%; The alkali lye waste water that contains that utilizes the deinking workshop to produce is transported in the desulphurization circulating groove, mixes with desulfurizing agent quick lime and sheet alkali, and one ton of attached amount of coal adds 8 kilograms of quick limes and 1 kilogram in sheet alkali; Contain alkali lye waste water through behind the recycling neutralization reaction desulfurization removing nitric, the waste water of low pH value is transmitted back between the water treatment vehicle in paper mill again and processes recycling.
The present invention adds paper mill sludge in the boiler oil coal, the basic anhydride in the mud and the SO in the coal
2, SO
3, NO
2And NO
3Carry out chemical reaction, generate neutral salt, reach the effect of desulfurization removing nitric.Have the short fiber combustible in the mud, make coal-fired increased activity, and under the catalytic action of the basic anhydride such as magnesia, ignition of coal point reduces about 80-150 ℃, and coal is fully burnt, the raising thermal efficiency reaches that province's coal is energy-conservation, the purpose of low-cost desulfurization.Because the caloric value of mud only has 800-1000 kilocalorie/kilogram, mixing proportion is excessive, can affect the normal combustion of boiler.In addition, the quantity of paper mill sludge generation is inadequate generally speaking, does not reach the demand of the whole desulfurization removing nitrics of boiler.For guaranteeing the desulfurization removing nitric effect, in the desulphurization circulating groove, add again a small amount of quick lime and sheet alkali, the alkaline waste water (about pH value 10) that utilizes papermaking to produce joins in the circulation desulfurization groove, mix with desulfurizing agent quick lime and sheet alkali, after entering the acidic oxide reaction neutralization in desulfurizing tower and the flue gas, again waste water is sent back to the paper-making water treatment workshop and process recycling.Utilize like this paper mill sludge and sewage, an amount of quick lime and the sheet alkali of adding, reach that desulfurization removing nitric is economized on coal and the purpose of refuse reclamation, make the CFBB smoke emissioning concentration reach the discharge standard of country, improve the thermal efficiency of boiler, accomplish the refuse cycling and reutilization, environmental contamination reduction, energy-saving and emission-reduction.Fluid bed is a kind of combustion system of cleaning, and the blending of the mud in the stove, coal and bed material is very fierce, and burning is stablized fully, and stove internal combustion temperature remains between 850～900 ℃, more than the time of staying 3s of flue gas in stove, effectively suppresses SO
2, SO
3, NO
2And NO
3Generation.Flue gas qualified discharge after dedusting that the stove afterbody is discharged.In addition, behind the adding paper mill sludge, because mud contains the combustible species such as short fiber, the thermal efficiency of boiler can improve more than 3%.
The advantage of recirculating fluidized bed paper mill sludge burning process
1, burning can make the paper mill sludge minimizing the most thorough;
2, detecting qualified burning ash and can be used for building materials, is relatively safe paper mill sludge disposal options;
3, burning disposal paper mill sludge speed is fast, does not need long term storage, has avoided the secondary pollution in the sludge handling process;
But 4, paper mill sludge on-site incineration does not need long-distance transportation;
5, can recover energy, improve boiler thermal output, reduce simultaneously the processing cost of paper mill sludge;
6, can make the whole carbonization after-flames of organic matter, pathogen kill, thereby innoxious degree is the highest;
7, excellent environmental-protecting performance utilizes the basic anhydride in the mud to carry out desulfurization removing nitric;
8, equipment fault is few, stable, and year running time is more than 7000 hours;
9, the method for operation is flexible, and reliability is high.
10, be easy to use papermaking alkali lye waste water and carry out desulfurization removing nitric, and recyclable processing recycling.
Description of drawings
Fig. 1 is process chart of the present invention.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments:
The present invention be with paper mill sludge as desulfurizing agent, after twice dehydration, the mud that is semi-oriented state is in strip with shaping mechanism, at the boiler coal feeding negative pressuren zone, directly enter burning in circulating fluid bed boiler, as the desulfurizing agent use of boiler, to reach the purpose of removing sulfide and nitride, simultaneously, again paper mill sludge is used as fuel, is used for burning, namely administered pollution, save again the energy, turned waste into wealth, also saved simultaneously electricity power enterprise's desulphurization cost.Consider the reasonable mixing proportion of mud and coal and the limited amount of sludge creation, for guaranteeing the effect of desulfurization, attached amount adds an amount of desulfurizing agent quick lime and sheet alkali again, and the alkali lye waste water that contains that papermaking is produced is transported in the desulphurization circulating groove, mix with quick lime, sheet alkali, form desulfurization alkali lye, enter desulfurizing tower through after the recycling neutralization, the waste water of low pH value is transmitted back between the water treatment vehicle in paper mill again and processes recycling, reaching the purpose that consumption reduction reduces discharging comprehensive utilization.
The main chemical compositions of paper mill mud is: CaO, MgO, Al
2O
3, Fe
2O
3And Na
2O, its basic anhydride content accounts for the over half of composition, and empty butt caloric value is 800 kilocalories/kg-1000 kilocalorie/kg, contains partial organic substances and higher basic anhydride.Mud granule is very thin, mud is directly carried out air pressurized to shrink, carry out processed, enter again the machinery pressurization and carry out the second dehydration processing, the mud that is semi-oriented state is sent into former and is made bar shaped, after being cut into segment with reamer, directly send into the negative pressure coal supply district of boiler, burn in burner hearth with coal.The acidic oxides such as the basic anhydride in the paper mill sludge and the sulfur dioxide in the coal, sulfur trioxide, nitrogen dioxide, nitrogen peroxide react rapidly, remove sulphur, nitrogen purpose to reach.The present invention is directly burning in boiler after mud half dehydration, utilizes alkaline matter in the mud and the SO in the boiler smoke
2, SO
3, NO
2And NO
3Chemical reaction occurs, and generates neutral salt, to reach the purpose of desulfurization removing nitric.There is the short fiber combustible in the mud, makes coal-fired increased activity, and under the catalytic action of the basic anhydride such as magnesia, coal is fully burnt, to reach the purpose of economizing on coal.Simultaneously, consider the reasonable mixing proportion of mud and coal and the limited amount of sludge creation, for guaranteeing the desulfurization removing nitric effect, attached amount adds a small amount of desulfurizing agent CaO and sheet alkali NaOH again, and the alkali lye waste water (about pH value 10) that contains that the deinking workshop is produced is transported in the desulphurization circulating groove, in desulfurizer, mix with desulfurizing agent CaO, NaOH, enter desulfurizing tower through after the recycling neutralization reaction, the waste water of low pH value is transmitted back between the water treatment vehicle in paper mill again and processes recycling, reaching the purpose that consumption reduction reduces discharging comprehensive utilization.
Paper mill sludge composition list
| Sequence number | The Interventions Requested title | Assay | Remarks |
| 1 | Total moisture M t％ | 70.2 | |
| 2 | Air-dried moisture M ad％ | 1.91 | |
| 3 | Empty Dry basis perch caloric value MJ/Kg | 3.70 | 890 kilocalories/Kg |
| 4 | Element hydrogen H d％ | 1.67 | |
| 5 | Calcium oxide CaO% | 44.86 | |
| 6 | Magnesia MgO% | 11.66 | |
| 7 | Di-iron trioxide Fe 2O 3％ | 0.52 |
| 8 | Alundum (Al2O3) Al 2O 3％ | 3.58 | |
| 9 | Sodium oxide molybdena Na 2O％ | 0.26 |
Inventive principle:
After first paper mill sludge being utilized the air pressurized mode to carry out processed, enter machinery pressurization again and carry out second dehydration, the mud that is semi-oriented state is made of forming machine and is in strip, and cuts into chunks with reamer, negative pressure coal supply district at boiler sends into burner hearth, burns with coal.Utilize basic anhydride and the sulfide in the flue-gas, nitride in the mud to react, generate neutral salt, to reach the purpose of desulfurization removing nitric.There is the short fiber combustible in the mud, and under the catalytic action of the basic anhydride such as magnesia, coal fully burnt, to reach the purpose of economizing on coal.Consider the limited amount of mixing proportion and the sludge creation of mud and coal, for guaranteeing the desulfurization removing nitric effect, attached amount adds a small amount of desulfurizing agent quick lime and sheet alkali again, and the alkali lye waste water (about pH value 10) that contains that the deinking workshop is produced is transported to the desulphurization circulating groove, mix with desulfurizing agent quick lime and sheet alkali, enter desulfurizing tower, through after the recycling neutralization reaction desulfurization, the waste water of low pH value is transmitted back between the water treatment vehicle in paper mill again and processes, and reaching the purpose that consumption reduction reduces discharging comprehensive utilization.
The present invention is a kind of method that paper mill sludge sewage is economized on coal for the circulating fluid bed boiler desulfurization denitrogenation, with paper mill sludge, directly carry out the air pressurized processed, pressure is 1.0～1.3MPa, water content is down to 60%, carry out second dehydration with the mode of machinery pressurization again, its water content is down to below 50%, is in strip with shaping mechanism, diameter 6～9mm, cut again the bar section of 8～12mm with reamer, send into the coal supply negative pressuren zone of boiler, in boiler furnace, burn with coal; 110 kilograms～140 kilograms in the mud of one ton of coal admixture water content about 50%; The alkali lye waste water that contains that utilizes the deinking workshop to produce is transported in the desulphurization circulating groove, attached amount adding desulfurizing agent quick lime and sheet alkali mix again, the acidic oxide that enters in desulfurizing tower and the flue gas carries out neutralization reaction, and one ton of coal more attached amount adds 1～3 kilogram in 8～11 kilograms of desulfurizing agent quick limes and sheet alkali; Contain alkali lye waste water through behind the recycling neutralization reaction desulfurization removing nitric, the waste water of low pH value is transmitted back between the water treatment vehicle in paper mill again and processes recycling.
Embodiment 1:
(the air-dried basis composition is: CaO 40%, MgO 11%, Fe with the paper mill sludge of water content more than 70%
2O
30.4%, Al
2O
32.2%, Na
2O 0.3%), directly carry out the air pressurized processed, sludge moisture content is down to below 60%, and dewatering pressure is 1.3Mpa, carries out second dehydration with the mode of machinery pressurization again, its water content is down to below 50%, be in strip with shaping mechanism, diameter 8mm is cut into the bar section of 10mm again with reamer, send into the coal supply negative pressuren zone of boiler, in boiler furnace, burn with coal.
Generally speaking, the sulfur content of coal is 2%-3%, one ton of coal desulfurization and denitrification needs 200 kilograms in the mud of proportioning water content about 50%, because the caloric value of mud only is 800-1000 kilocalorie/kilogram, CFBB requires the caloric value after coal and the mud blending to be controlled at 2500-3000 kilocalorie/kilogram.If the normal combustion that can affect too much coal that paper mill sludge is mixed.In addition, the amount that paper mill sludge produces can not satisfy the needs of boiler desulfurization denitrogenation fully, therefore can only be in coal admixture part paper mill sludge.The present invention is according to the breach value of paper mill sludge, and attached amount adds a small amount of desulfurizing agent quick lime CaO and sheet alkali NaOH again in the desulphurization circulating groove, and the amount of adding is decided on the breach of paper mill sludge and the mixing proportion of coal.
For example: the mud 120 kg of one ton of coal desulfurization and denitrification proportioning water content about 50% in the present embodiment (add theoretical should measure 200 kilograms 60%), the paper mill sludge ullage is 40%, in fact the desulfurizing agent ullage also is 40%.One ton of coal of cause is in the situation of not mixing mud, and should add desulfurizing agent quick lime is 50 kilograms, now lacks 20 kilograms of desulfurizing agent quick limes.Because the alkali lye waste water (about pH value 10) that contains that the present invention utilizes the deinking workshop to produce is transported in the desulphurization circulating groove, with desulphurizer mixing, the acidic oxide that enters in desulfurizing tower and the flue gas carries out neutralization reaction again.Can replace desulfurizing agent to use owing to contain the waste water of alkali lye, desulfurized effect can reach for about 10% (being equivalent to 5 kilograms of desulfurizing agent quick limes), therefore, should be the more attached amount of next ton of ordinary circumstance coal adds 2 kilograms in 10 kilograms of desulfurizing agent quick limes and sheet alkali and gets final product (one kilogram of sheet alkali can replace 2.3 kilograms of quick lime desulfurization).Contain alkali lye waste water through behind the recycling neutralization reaction desulfurization removing nitric, the waste water of low pH value is transmitted back between the water treatment vehicle in paper mill again and processes recycling.
Embodiment 2:
(composition after the oven dry is: CaO 42%, MgO 10%, Fe with paper mill sludge
2O
30.6%, Al
2O
32.3%, Na
2O 0.2%), directly carry out the air pressurized processed, sludge moisture content is by being down to more than 70% below 60%, and dewatering pressure is 1.3Mpa, carries out second dehydration with the mode of machinery pressurization again, its water content is down to below 50%, be in strip with shaping mechanism, diameter 8mm is cut into the bar section of 10mm again with reamer, send into the coal supply negative pressuren zone of boiler, in boiler furnace, burn with coal.
Generally speaking, the sulfur content of coal is 2%-3%, one ton of coal desulfurization and denitrification needs 200 kilograms in the mud of proportioning water content about 50%, because the caloric value of mud only is 800-1000 kilocalorie/kilogram, CFBB requires the caloric value after coal and the mud blending to be controlled at 2500-3000 kilocalorie/kilogram.If the normal combustion that can affect too much coal that paper mill sludge is mixed.In addition, the amount that paper mill sludge produces can not satisfy the needs of boiler desulfurization denitrogenation fully, therefore can only be in coal admixture part paper mill sludge.The present invention is according to the breach value of paper mill sludge, and attached amount adds a small amount of desulfurizing agent quick lime CaO and sheet alkali NaOH again in the desulphurization circulating groove, and the amount of adding is decided on the breach of paper mill sludge and the mixing proportion of coal.
For example: 140 kilograms in the mud of one ton of coal desulfurization and denitrification proportioning water content about 50% in the present embodiment (add theoretical should measure 200 kilograms 70%), the paper mill sludge ullage is 30%, in fact the desulfurizing agent ullage also is 30%, because of one ton of coal in the situation of burning sludge not, should add desulfurizing agent quick lime is 50 kilograms, now lacks 15 kilograms of desulfurizing agents.The alkali lye waste water (about pH value 10) that contains that utilizes the deinking workshop to produce is transported in the desulphurization circulating groove, mix with desulfurizing agent quick lime and sheet alkali, can replace desulfurizing agent to use owing to contain the waste water of alkali lye, desulfurized effect can reach for about 10% (being equivalent to 5 kilograms of desulfurizing agent quick limes), generally speaking, one ton of coal more attached amount add 1 kilogram in 8 kilograms of quick limes and sheet alkali and get final product (one kilogram of sheet alkali can replace 2.3 kilograms of quick lime desulfurization).Contain alkali lye waste water through behind the recycling neutralization reaction desulfurization removing nitric, the waste water of low pH value is transmitted back between the water treatment vehicle in paper mill again and processes recycling.
Its desulfurized effect of the present invention reaches the 15000mg/m of national regulation
3Below, the flue gas lingemann blackness reaches the I level, and the thermal efficiency improves more than 3%.
Embodiment recited above is described preferred embodiment of the present invention; be not that design of the present invention and protection domain are limited; under the prerequisite that does not break away from design concept of the present invention; common engineers and technicians make technical scheme of the present invention in this area various modification and improvement all should fall into protection scope of the present invention.
Claims (3)
1. one kind is used for the method that the circulating fluid bed boiler desulfurization denitrogenation is economized on coal to paper mill sludge sewage, it is characterized in that: with paper mill sludge, directly carry out the air pressurized processed, pressure is 1.0～1.3MPa, water content is down to 60%, carry out second dehydration with the mode of machinery pressurization again, its water content is down to below 50%, is in strip with shaping mechanism, diameter 6～9mm, be cut into again the bar section of 8～12mm with reamer, send into the coal supply negative pressuren zone of boiler, in boiler furnace, burn with coal; 110 kilograms～140 kilograms in the mud of one ton of coal admixture water content 50%; The alkali lye waste water that contains that utilizes the deinking workshop to produce is transported in the desulphurization circulating groove, attached amount adding desulfurizing agent quick lime and sheet alkali mix again, the acidic oxide that enters in desulfurizing tower and the flue gas carries out neutralization reaction, and one ton of coal more attached amount adds 1～3 kilogram in 8～11 kilograms of desulfurizing agent quick limes and sheet alkali; Contain alkali lye waste water through behind the recycling neutralization reaction desulfurization removing nitric, the waste water of low pH value is transmitted back between the water treatment vehicle in paper mill again and processes recycling.
2. according to claim 1 paper mill sludge sewage is used for the method that the circulating fluid bed boiler desulfurization denitrogenation is economized on coal, it is characterized in that: the paper mill sludge of water content more than 70% directly carried out the air pressurized processed, sludge moisture content is down to 60%, dewatering pressure is 1.3Mpa, carry out second dehydration with the mode of machinery pressurization again, its water content is down to below 50%, be in strip with shaping mechanism, diameter 8mm, be cut into again the bar section of 10mm with reamer, send into the coal supply negative pressuren zone of boiler, in boiler furnace, burn with coal; The mud 120 kg of one ton of coal desulfurization and denitrification proportioning water content 50%; The alkali lye waste water that contains that utilizes the deinking workshop to produce is transported in the desulphurization circulating groove, and attached amount adds desulfurizing agent quick lime and sheet alkali mixes again, and one ton of coal more attached amount adds 2 kilograms in 10 kilograms of desulfurizing agent quick limes and sheet alkali; Contain alkali lye waste water through behind the recycling neutralization reaction desulfurization removing nitric, the waste water of low pH value is transmitted back between the water treatment vehicle in paper mill again and processes recycling.
3. according to claim 1 paper mill sludge sewage is used for the method that the circulating fluid bed boiler desulfurization denitrogenation is economized on coal, it is characterized in that: paper mill sludge is directly carried out the air pressurized processed, sludge moisture content is by being down to 60% more than 70%, dewatering pressure is 1.3Mpa, carry out second dehydration with the mode of machinery pressurization again, its water content is down to below 50%, be in strip with shaping mechanism, diameter 8mm, be cut into again the bar section of 10mm with reamer, send into the coal supply negative pressuren zone of boiler, in boiler furnace, burn with coal; 140 kilograms in the mud of one ton of coal desulfurization and denitrification proportioning water content 50%; The alkali lye waste water that contains that utilizes the deinking workshop to produce is transported in the desulphurization circulating groove, mixes with desulfurizing agent quick lime and sheet alkali, and one ton of attached amount of coal adds 8 kilograms of quick limes and 1 kilogram in sheet alkali; Contain alkali lye waste water through behind the recycling neutralization reaction desulfurization removing nitric, the waste water of low pH value is transmitted back between the water treatment vehicle in paper mill again and processes recycling.
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|---|---|---|---|---|
| CN102676267A (en) * | 2012-05-28 | 2012-09-19 | 东莞海龙纸业有限公司 | Method for devulcanization by burning power plant fire coal mixed with dried sludge |
| CN106765270A (en) * | 2016-11-04 | 2017-05-31 | 湖南广信科技股份有限公司 | A kind of fine coal enters stove burning explosion-proof method |
| CN109486542A (en) * | 2018-12-25 | 2019-03-19 | 山东华泰纸业股份有限公司 | A method of desulfurizing agent is prepared using paper waste factory chemical sludge |
| CN111471503A (en) * | 2020-03-19 | 2020-07-31 | 北京国电龙源环保工程有限公司 | Coal-fired power plant co-processing domestic waste derived fuel processing system |
| CN117534193A (en) * | 2024-01-10 | 2024-02-09 | 浙江浙能兴源节能科技有限公司 | Method for recycling wastewater in sludge drying incineration plant |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307387C (en) * | 2004-12-08 | 2007-03-28 | 杭州华章电气工程有限公司 | Method for removing ink from waste paper by firing |
| CN101716459A (en) * | 2010-01-08 | 2010-06-02 | 山东新汶热电有限公司 | Integrated method of boiler gas desulfurization and desulfurization waste liquid treatment |
| CN101832565A (en) * | 2010-04-06 | 2010-09-15 | 赵德智 | Electricity-generating method by incinerating paper-making wet sludge |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003056818A (en) * | 2001-08-10 | 2003-02-26 | Tsukishima Kikai Co Ltd | Processing method for sludge in paper making, and calcined substance |
| JP2008081568A (en) * | 2006-09-27 | 2008-04-10 | Nippon Steel Engineering Co Ltd | Biomass fuel and method for producing the same |
-
2011
- 2011-05-18 CN CN 201110142947 patent/CN102269418B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307387C (en) * | 2004-12-08 | 2007-03-28 | 杭州华章电气工程有限公司 | Method for removing ink from waste paper by firing |
| CN101716459A (en) * | 2010-01-08 | 2010-06-02 | 山东新汶热电有限公司 | Integrated method of boiler gas desulfurization and desulfurization waste liquid treatment |
| CN101832565A (en) * | 2010-04-06 | 2010-09-15 | 赵德智 | Electricity-generating method by incinerating paper-making wet sludge |
Non-Patent Citations (4)
| Title |
|---|
| JP特开2003-56818A 2003.02.26 |
| JP特开2008-81568A 2008.04.10 |
| 张扬.造纸污泥脱水与污泥焚烧处理技术.《黑龙江造纸》.2009,(第2期), |
| 造纸污泥脱水与污泥焚烧处理技术;张扬;《黑龙江造纸》;20090630(第2期);全文 * |
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