CN106583426A - Papermaking waste residue energy utilization method - Google Patents
Papermaking waste residue energy utilization method Download PDFInfo
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- CN106583426A CN106583426A CN201710020413.XA CN201710020413A CN106583426A CN 106583426 A CN106583426 A CN 106583426A CN 201710020413 A CN201710020413 A CN 201710020413A CN 106583426 A CN106583426 A CN 106583426A
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- waste sludge
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- 239000002699 waste material Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000000197 pyrolysis Methods 0.000 claims abstract description 71
- 239000000463 material Substances 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002296 pyrolytic carbon Substances 0.000 claims abstract description 14
- 239000003245 coal Substances 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 62
- 239000010802 sludge Substances 0.000 claims description 50
- 238000011084 recovery Methods 0.000 claims description 19
- 238000004140 cleaning Methods 0.000 claims description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 11
- 239000003546 flue gas Substances 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 235000019738 Limestone Nutrition 0.000 claims description 8
- 239000000567 combustion gas Substances 0.000 claims description 8
- 239000006028 limestone Substances 0.000 claims description 8
- 239000003513 alkali Substances 0.000 claims description 7
- 229910052736 halogen Inorganic materials 0.000 claims description 7
- 150000002367 halogens Chemical class 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 238000004065 wastewater treatment Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 4
- 239000003517 fume Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 210000000952 spleen Anatomy 0.000 claims description 3
- 235000019504 cigarettes Nutrition 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 claims description 2
- 239000002918 waste heat Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000002156 mixing Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 2
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 2
- 239000004571 lime Substances 0.000 abstract 2
- 239000000843 powder Substances 0.000 abstract 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 abstract 1
- 239000004033 plastic Substances 0.000 description 11
- 229920003023 plastic Polymers 0.000 description 11
- 239000002893 slag Substances 0.000 description 9
- 230000008901 benefit Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 241000202567 Fatsia japonica Species 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005235 decoking Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/02—Gases or liquids enclosed in discarded articles, e.g. aerosol cans or cooling systems of refrigerators
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a papermaking waste residue energy utilization method and relates to the technical field of waste treatment and recycling. The papermaking waste residue energy utilization method comprises the following steps of S1, crushing papermaking waste residues to enable the size of crushed materials to be smaller than or equal to a given size; S2, dehydrating the crushed materials to enable the water content of the crushed materials to be less than or equal to 20%; S3, conveying the materials dehydrated in the step S2 to a pyrolysis furnace, and pyrolyzing the dehydrated materials to generate pyrolytic carbon and pyrolytic gas; and S4, mixing a certain amount of lime powder into the pyrolytic carbon obtained in the step S3 to conduct mixing treatment, and introducing the pyrolytic gas into a gas purifying device for treatment. The papermaking waste residue energy utilization method has the beneficial effects that the lime powder is mixed into the pyrolytic carbon generated from pyrolyzation for mixing treatment, the pyrolytic gas is introduced into the gas purifying device for treatment, dioxin can be prevented from generating in the subsequent burning process, and secondary pollution is avoided; pyrolytic carbon and pyrolytic gas are fed into a boiler for mixing-burning, and the coal burning amount of a paper mill is reduced.
Description
Technical field
The present invention relates to waste treatment technical field, and in particular to a kind of waste sludge from paper mill recovery energy method.
Background technology
Waste sludge from paper mill is that in recycled writing paper production process, in the solid waste that the pulp washing stage produces, its main source is to make
Plastics outer film and bookbinding duroplastss included in waste paper for raw material.Due to being washed using washing in recycled writing paper production technology
Slurry, therefore the waste plastics for sorting out contains very high moisture content, typically 50～60%.The main species of its plastics with PP and
Based on PE, also containing a small amount of PVC.At present most domestic recycled writing paper producer is typically using the method for landfill, pelletize or stacking
Process waste sludge from paper mill.Landfill and the mode stacked take the land resource of considerable scale, while and easily causing underground water pollution；
Pelletize, recovery utilization rate is low, high cost, while easily causing serious secondary pollution.
The content of the invention
It is an object of the invention to provide a kind of waste sludge from paper mill recovery energy method, based on continuous pyrolysis technology, changes
The each form ratio of good thermal decomposition product, by waste plastics the pyrolysis gas for producing are pyrolyzed, and insulation mixes burning into paper plant's coal-burning boiler, is paper
Factory produces the industrial steam needed for providing, and saves the required Coal-fired capacity of paper plant's production, to solve or at least mitigate institute in background technology
The problem at least one for existing.
Due to waste sludge from paper mill moisture content it is higher, typically 50%～60% or so, if do not control material and be pyrolyzed containing into stove
Water rate (pyrolysis need to be reduced to less than 15%), then can affect the overall calorific value of material and output object ratio.In addition, in waste sludge from paper mill
Containing a certain amount of metal substances matter, for fine crushing equipment has larger infringement, pre-dressing is needed out.In papermaking waste plastics
Containing a certain amount of PVC, need to carry out cured to halogens during pyrolytic gasification, it is to avoid equipment corrosion.Papermaking is given up
After plastics aerogenesis, tar, the dust problem contained in pyrolysis gas.Secondary pollution control when pyrolysis gas and pyrolysis carbon residue heat energy utilization
Problem processed.
Waste sludge from paper mill is mainly derived from five process sections i.e. according to recycled writing paper production technology：
1) bale opener re-scheduling slag；
2) rotary drum hydrabrusher re-scheduling slag；
3) slag draining and separating machine deslagging；
4) high efficiency slag remover deslagging；
5) dense scummer deslagging in；
According to the volume to weight ratio of waste sludge from paper mill, weight slag and light slag can be classified as.Wherein weigh slag and be mainly twisted rope, buckle class
Plastics, simultaneously containing a certain amount of sandstone and metal；Light slag is mainly recycled writing paper outer package plastic sheeting, but also containing a small amount of
The metal substances matter such as drawing pin, paperclip.
The initial configuration of waste sludge from paper mill is complex, and moisture content is higher, is not appropriate for directly using pyrolytic technique, needs head
First the waste plastics in waste sludge from paper mill is sorted out, and process can just carry out pyrolysis disposal to certain form.
Analyze according to more than, the technical solution used in the present invention is：A kind of waste sludge from paper mill recovery energy method is provided, is wrapped
Containing following steps：
S1, crushes to waste sludge from paper mill, makes the material size after crushing be less than or equal to given size；
S2, is dehydrated to the material after broken, makes the material water ratio after crushing be less than or equal to 20%；
S3, by the material after processed in the step S2 pyrolysis oven is delivered to, and pyrolysis generates pyrolytic carbon and pyrolysis gas；
S4, in the pyrolytic carbon obtained in step S3 a certain amount of pulverized limestone is mixed, and carries out mixed processing；The heat
Vent one's spleen and be passed through gas cleaning device and processed.
Preferably, in step S4, the amount of the pulverized limestone mixed in pyrolytic carbon is halogens thing in waste sludge from paper mill
1.2～3 times of the amount of matter.
Preferably, in step S4, pyrolysis gas are divided into two-way after gas cleaning device process, and combustion is entered all the way
Burner is directly burnt, and is pyrolysis oven heat supply, and another road enters boiler furnace, and with fire coal burning is mixed.
Preferably, in step S3, the material is pyrolyzed under anoxybiotic environment in pyrolysis oven, pyrolysis temperature control
At 500～650 DEG C, pyrolysis time was at 0.8～1 hour.
Preferably, in step S2, the material after crushing first with drier is dried, by moisture control
Below 20%, then further the moisture content in the material is reduced to into less than 15% using conveying fan.
Preferably, in step S1, first waste sludge from paper mill is crushed to by below 80mm sizes by the first disintegrating machine,
Then waste sludge from paper mill is crushed to into below 50mm sizes using the second disintegrating machine, is set between the first disintegrating machine and the second disintegrating machine
Be equipped with electric magnetic iron remover, for removing material in metallicses.
Preferably, in step S4, pyrolysis gas are passed through after gas cleaning device, passed sequentially through cyclone dust extractor, are done
After formula Alkali absorption device, into combustion gas attemperator, the temperature of pyrolysis gas is maintained more than 320 DEG C by the combustion gas attemperator.
Preferably, pyrolysis gas are entered after combustion chambers burn, and the tail gas that pyrolysis gas burning is produced enters after afterheat heat exchanger
Enter flue gas processing device, process rear discharge up to standard；Remaining thermogenetic hot-air a, part is used for the distribution of combustor, a part
For the auxiliary drying in step S2, a part is conveyed for the insulation of pyrolysis gas.
Preferably, the conveying wind send the wind of generation to send tail gas into flue gas processing device process；The wind send tail gas with
And pyrolysis gas sequentially pass through acid spray, alkali spray and activated carbon in the tail gas that burning Indoor Combustion is produced in flue gas processing device
Qualified discharge after absorption.
Preferably, water, the fume treatment produced to material dewatering in water, step S2 is leached in the waste sludge from paper mill storage hole
The pyrolysis gas purifying waste water processing in fume treatment waste water, gas cleaning device and plant area's ground flushing water in device enters
Enter wastewater treatment equipment and process rear discharge up to standard.
The beneficial effects of the present invention is：
The waste sludge from paper mill recovery energy method of the present invention is pyrolyzed using continuous pyrolysis mode to waste sludge from paper mill, in heat
Pulverized limestone is mixed in the pyrolytic carbon that solution is produced carries out mixed processing, and pyrolysis gas are passed through gas cleaning device and are processed, Ke Yiyou
Effect control pyrolytic carbon produces bioxin with pyrolysis gas in subsequent combustion operation, it is to avoid secondary pollution；The useless modeling of papermaking is disposed in pyrolysis
For material is compared to incineration disposal, smoke yields are less, and flue gas pollutant content is less, particularly the controlling party of bioxin
Face, is equipped with more preferable environmental benefit at pyrolysis.
The recycling thinking of waste sludge from paper mill pyrolysis aerogenesis boiler of feeding burning production industrial steam is proposed, at landfill
Put with for pelletize, with higher economic benefit and environmental benefit, more agree with the present situation of recycled paper mill；Combustor is produced
High-temperature tail gas rationally use many aspects, and thermal loss is reduced as far as possible, improve the thermal efficiency.
Using multiple stage crushing plus the pretreatment mode of magnetic separation, waste sludge from paper mill complicated and changeable can be preferably controlled in industrialization
Fluctuation in continuous production, in the seriality and pyrolytic process that have ensured pyrolysis good mass-and heat-transfer effect is possessed.
Combustion gas insulation conveying, solves and produce in pyrolytic process tar, is unfavorable for conveying and mixing the problem of burning.In high temperature bar
Under part, tar-like substance will not form tamper blocking pipeline and burner noz(zle) still in gaseous state, meanwhile, tar-like substance
With higher calorific value, directly decoking is not more beneficial for improving the thermal efficiency of whole system.
Description of the drawings
Fig. 1 is the flow chart of the waste sludge from paper mill recovery energy method of one embodiment of the invention.
Specific embodiment
To make purpose, technical scheme and the advantage of present invention enforcement clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from start to finish or class
As label represent same or similar element or the element with same or like function.Described embodiment is the present invention
A part of embodiment, rather than the embodiment of whole.It is exemplary below with reference to the embodiment of Description of Drawings, it is intended to use
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.Under
Face combines accompanying drawing and embodiments of the invention is described in detail.
In describing the invention, it is to be understood that term " " center ", " longitudinal direction ", " horizontal ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward " is based on accompanying drawing institute
The orientation for showing or position relationship, are for only for ease of the description present invention and simplify description, rather than indicate or imply the dress of indication
Put or element with specific orientation, with specific azimuth configuration and operation, therefore it is not intended that must be protected to the present invention
The restriction of scope.
As shown in figure 1, a kind of waste sludge from paper mill recovery energy method, comprises the steps of：
S1, crushes to waste sludge from paper mill, makes the material size after crushing be less than or equal to given size；
Specifically, in the present embodiment, in step S1, the papermaking being temporarily stored in storage hole is given up first with grab bucket
Slag is delivered to the first disintegrating machine, and waste sludge from paper mill is crushed to into below 80mm sizes by the first disintegrating machine, through the first disintegrating machine
Carry out the waste sludge from paper mill after coarse crushing and the second disintegrating machine is delivered to by the way of Belt Conveying, then will using the second disintegrating machine
Waste sludge from paper mill is crushed to below 50mm sizes.Electric magnetic iron remover is provided between the first disintegrating machine and the second disintegrating machine, defeated
During sending, belt top arranges electric magnetic iron remover, to the blade for reclaiming the second disintegrating machine of metal and protection, to remove material
In metallicses.
It is understood that containing the difference of amount of metal and species according to material, multi-stage magnetic separation can be set, to ensure metal
Most of removal of class material.Meanwhile, the specifically broken size of the first disintegrating machine and the second disintegrating machine can be according to practical situation
Setting adjustment, to meet different duty requirements, improves work efficiency.
By material size of second disintegrating machine after in small, broken bits in below 50mm, after a simple dewatering feed bin, contain
Water rate substantially remains in 50% or so, and by helix transporting device dehydration equipment is delivered to.
S2, is dehydrated to the material after broken, makes the material water ratio after crushing be less than or equal to 15%；
In the present embodiment, the dehydration equipment selects drier, and the material after crushing first with drier is carried out
Dry, by moisture control below 20%, be then further reduced to the moisture content in the material using conveying fan
Less than 15%, it is higher than mechanical compress dewatering efficiency on the premise of compared with low energy consumption, it is dehydrated safer, economy than heat exchange.
S3, by the material after processed in the step S2 pyrolysis oven is delivered to, and pyrolysis generates pyrolytic carbon and pyrolysis gas；
In the present embodiment, in step S3, directly the material is delivered to using the conveying fan in step S2
Pyrolysis oven.Specifically, high-power blower is delivered to the waste sludge from paper mill that drying has been crushed in waste sludge from paper mill by pipeline air blast
The preposition feed bin of pyrolysis oven.The moisture content of waste sludge from paper mill is reduced to further below less than 15% from 20% during wind send, defeated
Send a tail wind to collect in a organized way to flue gas processing device, dispose qualified discharge.It is a small amount of for what is contained in waste sludge from paper mill that wind send residue
Other materials such as stone, copper billet, glass, it is unified collect after be recycled.
S4, in the pyrolytic carbon obtained in step S3 a certain amount of pulverized limestone is mixed, and carries out mixed processing；The heat
Vent one's spleen and be passed through gas cleaning device and processed.Pulverized limestone combined amount is relevant with the amount of halogens material in waste plastics, at this
In embodiment, the amount of the pulverized limestone mixed in pyrolytic carbon is 1.2～3 times of the amount of halogens material in waste sludge from paper mill.Mixing
After the completion of haul to boiler coal mixing plant, coal mixing combustion, as boiler oil.
In the present embodiment, in step S3, the material is pyrolyzed under anoxybiotic environment in pyrolysis oven, pyrolysis temperature
At 500 DEG C～650 DEG C, pyrolysis time was at 0.8～1 hour for degree control.It is understood that the pyrolysis temperature in pyrolysis oven can be with
Any temperature between 500 DEG C～650 DEG C, pyrolysis time is selected to select any time between 0.8～1 hour；For example,
In an alternative embodiment, pyrolysis temperature is controlled at 550 DEG C, and pyrolysis time was at 0.95 hour；In another alternative
In, pyrolysis temperature is controlled at 600 DEG C, and pyrolysis time was at 0.85 hour.
In the present embodiment, in step S4, pyrolysis gas are divided into two-way after gas cleaning device process, all the way
Directly burn into burner, be pyrolysis oven heat supply, another road enters boiler furnace, and with fire coal burning is mixed.
In the present embodiment, in step S4, pyrolysis gas are passed through after gas cleaning device, pass sequentially through cyclone dust removal
After device, dry type Alkali absorption device, into combustion gas attemperator, the temperature of pyrolysis gas is maintained more than 320 DEG C by combustion gas attemperator.
Have an advantage in that, solve and produce in pyrolytic process tar, be unfavorable for conveying and mixing the problem of burning.Under the high temperature conditions, tar
Class material will not form tamper blocking pipeline and burner noz(zle) still in gaseous state, meanwhile, tar-like substance also has higher
Calorific value, directly decoking is not more beneficial for improving the thermal efficiency of whole system.Gas cleaning device is solved because containing in waste plastics
Halogens and cause equipment corrosion accelerate problem, fundamentally control follow-up combustion gas and mix the generation for burning journey Zhong bioxin
Source.
In the present embodiment, pyrolysis gas are entered after combustion chambers burn, and the tail gas that pyrolysis gas burning is produced exchanges heat through waste heat
After device, into flue gas processing device, rear discharge up to standard is processed；Remaining thermogenetic hot-air a, part is used for the distribution of combustor,
A part is conveyed for the auxiliary drying in step S2, a part for the insulation of pyrolysis gas.The high-temperature tail gas that combustor is produced
Many aspects are rationally used, thermal loss is reduced as far as possible, improve the thermal efficiency.
In the present embodiment, the conveying wind send the wind of generation to send tail gas into flue gas processing device process；The wind send
Tail gas and pyrolysis gas the tail gas that burning Indoor Combustion is produced sequentially pass through in flue gas processing device acid spray, alkali spray and
Qualified discharge after activated carbon adsorption.Because pyrolytic process is unsatisfactory for the formation condition of bioxin, and further through alkali before fuel gas buring
Absorb absorption and fallen contained most halogens, so in this method, the almost generation without bioxin, its content is far low
In working standard.
In the present embodiment, water, the cigarette produced to material dewatering in water, step S2 is leached in the waste sludge from paper mill storage hole
The pyrolysis gas purifying waste water processing in fume treatment waste water, gas cleaning device and plant area's ground flushing in Flash Gas Compression Skid System
Water enters wastewater treatment equipment and processes rear discharge up to standard.It is understood that the wastewater treatment equipment can use papermaking
The existing wastewater treatment line of factory, because the water yield is overall less, can be fed directly to the existing sewage of paper plant after appropriate precipitation
Treatment plant's qualified discharge, to reduce equipment investment.
The waste sludge from paper mill recovery energy method of the present invention proposes waste sludge from paper mill pyrolysis aerogenesis boiler of feeding burning production industry
The recycling thinking of steam, with respect to landfill stabilization and pelletize for, with higher economic benefit and environmental benefit, more contract
The present situation of recycled paper mill is closed, the coal-fired usage amount of recycled writing paper paper plant 15%～20% can be saved.
It is last it is to be noted that：Above example only to illustrate technical scheme, rather than a limitation.To the greatest extent
Pipe has been described in detail with reference to the foregoing embodiments to the present invention, it will be understood by those within the art that：It is still
Technical scheme described in foregoing embodiments can be modified, or equivalent is carried out to which part technical characteristic and replaced
Change；And these modifications or replacement, do not make the essence of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution
God and scope.
Claims (10)
1. a kind of waste sludge from paper mill recovery energy method, it is characterised in that comprise the steps of：
S1, crushes to waste sludge from paper mill, makes the material size after crushing be less than or equal to given size；
S2, is dehydrated to the material after broken, makes the material water ratio after crushing be less than or equal to 15%；
S3, by the material after processed in the step S2 pyrolysis oven is delivered to, and pyrolysis generates pyrolytic carbon and pyrolysis gas；
S4, in the pyrolytic carbon obtained in step S3 a certain amount of pulverized limestone is mixed, and carries out mixed processing；The pyrolysis gas
It is passed through gas cleaning device to be processed.
2. waste sludge from paper mill recovery energy method as claimed in claim 1, it is characterised in that in step S4, pyrolysis
The amount of the pulverized limestone mixed in carbon is 1.2～3 times of the amount of halogens material in waste sludge from paper mill.
3. waste sludge from paper mill recovery energy method as claimed in claim 1, it is characterised in that in step S4, pyrolysis
Gas is divided into two-way after gas cleaning device process, directly burns into burner all the way, is pyrolysis oven heat supply, and another road is entered
Enter boiler furnace, with fire coal burning is mixed.
4. waste sludge from paper mill recovery energy method as claimed in claim 3, it is characterised in that：In step S3, the thing
Material is pyrolyzed under anoxybiotic environment in pyrolysis oven, and pyrolysis temperature is controlled at 500～650 DEG C, and pyrolysis time was at 0.8～1 hour.
5. waste sludge from paper mill recovery energy method as claimed in claim 4, it is characterised in that：It is sharp first in step S2
Material after being crushed with drier is dried, then further using conveying fan by moisture control below 20%
Moisture content in the material is reduced to into less than 15%.
6. waste sludge from paper mill recovery energy method as claimed in claim 5, it is characterised in that：In step S1, first
Waste sludge from paper mill is crushed to by below 80mm sizes by the first disintegrating machine, is then crushed to waste sludge from paper mill using the second disintegrating machine
Below 50mm sizes, between the first disintegrating machine and the second disintegrating machine electric magnetic iron remover is provided with, for removing material in gold
Category material.
7. waste sludge from paper mill recovery energy method as claimed in claim 6, it is characterised in that：In step S4, pyrolysis
Gas is passed through after gas cleaning device, described into combustion gas attemperator after passing sequentially through cyclone dust extractor, dry type Alkali absorption device
The temperature of pyrolysis gas is maintained more than 320 DEG C by combustion gas attemperator.
8. waste sludge from paper mill recovery energy method as claimed in claim 7, it is characterised in that：Pyrolysis gas enter combustion chambers burn
Afterwards, the tail gas that pyrolysis gas burning is produced, into flue gas processing device, processes rear discharge up to standard after afterheat heat exchanger；Waste heat
The hot-air of generation a, part is used for the distribution of combustor, and, for the auxiliary drying in step S2, a part is for hot for a part
The insulation conveying vented one's spleen.
9. waste sludge from paper mill recovery energy method as claimed in claim 8, it is characterised in that：The conveying wind send the wind of generation
Tail gas is sent into flue gas processing device process；The wind send tail gas and pyrolysis gas in the tail gas of burning Indoor Combustion generation in cigarette
Qualified discharge after acid spray, alkali spray and activated carbon adsorption is sequentially passed through in Flash Gas Compression Skid System.
10. waste sludge from paper mill recovery energy method as claimed in claim 9, it is characterised in that：In the waste sludge from paper mill storage hole
The water, the flue gas processing device that leach water, material dewatering produced in step S2 in fume treatment waste water, gas cleaning device
In pyrolysis gas purifying waste water processing and plant area ground flushing water enter wastewater treatment equipment process it is up to standard after discharge.
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| CN110142284A (en) * | 2019-05-31 | 2019-08-20 | 联盛纸业（龙海）有限公司 | A kind of waste residue removes iron dewatering process and its equipment |
| CN111575439A (en) * | 2020-05-28 | 2020-08-25 | 中冶赛迪技术研究中心有限公司 | Emission reduction method and system for treating waste pollutants by electric arc furnace |
| CN113862007A (en) * | 2021-09-24 | 2021-12-31 | 中国科学院广州能源研究所 | Industrial organic solid waste pyrolysis gasification and coal-fired cogeneration coupling method |
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