CN108758658A - A kind of useless activated coke Incineration in CFB system - Google Patents
A kind of useless activated coke Incineration in CFB system Download PDFInfo
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- CN108758658A CN108758658A CN201810853698.XA CN201810853698A CN108758658A CN 108758658 A CN108758658 A CN 108758658A CN 201810853698 A CN201810853698 A CN 201810853698A CN 108758658 A CN108758658 A CN 108758658A
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- activated coke
- heat exchanger
- incineration
- fluidized bed
- useless
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- 239000000571 coke Substances 0.000 title claims abstract description 77
- 239000003546 flue gas Substances 0.000 claims abstract description 48
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000000605 extraction Methods 0.000 claims abstract description 14
- 238000001179 sorption measurement Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims description 17
- 230000003134 recirculating effect Effects 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000002826 coolant Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 239000002737 fuel gas Substances 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 230000005619 thermoelectricity Effects 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- 239000000126 substance Substances 0.000 description 9
- 239000006004 Quartz sand Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000010865 sewage Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- -1 Flue gas nitrogen oxides Chemical class 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000011953 bioanalysis Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 238000009279 wet oxidation reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses a kind of useless activated coke Incineration in CFB systems, including Incineration in CFB device, drum, tail flue gas heat reclaim unit, First Heat Exchanger, desulfation dust-extraction device, activated coke adsorption tower, air-introduced machine and the second heat exchanger being sequentially arranged, the flue gas that the Incineration in CFB device generates passes through tail flue gas heat reclaim unit, First Heat Exchanger, desulfation dust-extraction device and activated coke adsorption tower successively, then through in the second heat exchanger and smoke stack emission to air after being drawn by air-introduced machine.Useless activated coke Incineration in CFB system provided by the invention carries out thermoelectricity production using the heat that useless activated coke burning generates, to realize waste recovery energy, environmental protection treatment is carried out to the tail gas that activated coke burning generates that gives up simultaneously, reach non-pollution discharge, solves the subsequent processing of useless activated coke.
Description
Technical field
The invention belongs to energy technology field more particularly to a kind of useless activated coke Incineration in CFB systems.
Background technology
Traditional water technology such as chemical method, bioanalysis, oxidizing process, active carbon adsorption, embrane method etc., due to its technique
Existing weakness itself, when carrying out sewage depths reason, investment is big, processing cost is relatively high, while process cycle is also longer, because
This, enterprise and society can not bear.Activated coke be the one kind developed using high volatile coal as primary raw material have adsorbent and
The particulate matter of catalyst dual property, a kind of porous carbonaceous material are the activated carbons for not obtaining abundant destructive distillation or activation
Class adsorbent.The characteristics of activated coke active charcoal, but it overcomes that activated carbon price is high, mechanical strength is low, Yi Fen again simultaneously
Broken disadvantage.
Activated coke has powerful pore structure and special functional group, to suspended matter, inorganic matter and the organic matter in sewage
Etc. harmful components there is very strong adsorption capacity, and activated coke is cheap compared with activated carbon, and the country has a collection of sewage disposal enterprise
Using activated coke come the purified treatment for water sources such as municipal sewage, industrial wastewater, polluted river waters, given up by activated coke is processed
Water can be used for Treated sewage reusing, can effectively alleviate the discharge of waste water and the pollution to environment.
Although activated coke has absolute advantage in terms of the dirty water decontamination handles than traditional waste water treatment process, gives up and live
Property burnt (deactivated activated coke after processed sewage) subsequent processing be a problem.Although the regeneration of activated carbon can be used for reference
Treatment process (chemical regeneration method, bio-regeneration method, wet oxidation process, electrolytic oxidation or heating method of reproduction that such as medicament elutes)
Active regeneration is carried out to useless activated coke, but since useless activated coke water content is high, organic object amount of absorption is big, carries out regeneration activity
Processing is not only of high cost, number is limited, but also the organic matter adsorbed is easy to be precipitated from useless activated coke pore structure, causes two
Secondary pollution is bound to cause environmental pollution again if arbitrarily stacked, and therefore, the Utilizing question for solving useless activated coke is the task of top priority.
Invention content
The purpose of the present invention is to provide a kind of useless activated coke Incineration in CFB system, using rich in moisture, organic
The heat of the useless activated coke burning release of object produces high temperature and high pressure steam, and to carry out power generation or heat supply, final realization is useless
Object recovery energy, while environmental protection treatment is carried out to the tail gas that activated coke burning generates that gives up, reach non-pollution discharge, solves useless
The subsequent processing of activated coke.
The present invention adopts the following technical scheme that：
A kind of useless activated coke Incineration in CFB system, including be sequentially arranged Incineration in CFB device, drum,
Tail flue gas heat reclaim unit, First Heat Exchanger, desulfation dust-extraction device, activated coke adsorption tower, air-introduced machine and the second heat exchanger.
The Incineration in CFB device includes circulating fluidized bed incinerator, is connect with circulating fluidized bed incinerator bottom
Batcher and igniter, with circulating fluidized bed incinerator at the top of connect separator, setting in separator and recirculating fluidized bed
Material returning device between incinerator.
Primary air piping is equipped in the igniter.
The separator is cyclone separator.
Useless activated coke enters circulating fluidized bed incinerator by batcher, adds to circulating fluidized bed incinerator through igniter
Heat, and First air is sent by primary air piping, it is crushed after activated coke of giving up burning and generates ash particle, ash particle is after separator detaches
It is back to circulating fluidized bed incinerator by material returning device or enters tail flue gas heat reclaim unit.
The height of the circulating fluidized bed incinerator is 25~50 meters, primarily to useless activated coke is analysed in incinerator
It is 4-6 seconds that the flammable volatile matter gone out, which has sufficient residence time, residence time, keeps burning more abundant.
Several secondary air channels are arranged on the opposite wall of the circulating fluidized bed incinerator, are mainly used for adjusting burning
Situation；By injecting a certain amount of Secondary Air into circulating fluidized bed incinerator, the generation of nitrogen oxides can be effectively inhibited；Two
The Secondary Air of secondary air hose input accounts for the 40-60% of total blast volume in circulating fluidized bed incinerator, and the percentage is volume ratio.
Preferably, the Secondary Air of secondary air channel input accounts for 50% of total blast volume in circulating fluidized bed incinerator, useless to realize
The abundant burning of activated coke, inhibits the generation of nitrogen oxides.
The internal face of the recirculating fluidized bed arranges water-cooling wall, mainly absorbs the heat for activated coke burning release of giving up.
Ignition temperature in the circulating fluidized bed incinerator is 850~950 DEG C.
The tail flue gas heat reclaim unit is sequentially arranged high temperature superheater, low temperature superheater, saves coal from top to bottom
Device and air preheater.
The drum is divided into the first half and lower half, the outlet of the first half and economizer, the outlet of water-cooling wall and low temperature
Superheater connects, and the entrance of lower half and water-cooling wall connects.Drum is mainly used for steam-water separation, the steam isolated from drum according to
It is secondary to be connected by low temperature superheater, high temperature superheater and electric power or heating equipment, it is used for power generation or heat supply.
The entrance of the economizer is connect with waterworks, and outlet is connect with the first half of drum.
The entrance of the air preheater is connect with pressure fan, outlet and primary air piping and the secondary air channel of air preheater
Connection.
The useless activated coke Incineration in CFB system further includes being arranged in the outlet of circulating fluidized bed incinerator and dividing
From the denitrification apparatus between device, main function is the nitrogen oxides generated in the useless activated coke burning of removing.
The denitrification apparatus is selective non-catalytic reduction (SNCR) denitrification apparatus, under the action of no catalyst,
It is suitble to penetrating reducing agent in " temperature window " of denitration reaction that the nitrogen oxides in flue gas is reduced to harmless nitrogen and water.
Reducing agent in described selective non-catalytic reduction (SNCR) denitrification apparatus is selected from ammonium hydroxide or urea.
The First Heat Exchanger is connected with the second heat exchanger, and First Heat Exchanger drops to flue gas with after flue gas heat exchange
Certain temperature works normally convenient for desulfation dust-extraction device, in addition after the heat of the cooling Absorption of Medium flue gas in First Heat Exchanger
It is transferred in the second heat exchanger and is used as heat medium, the flue gas for heating chimney entrance is avoided with improving discharge flue-gas temperature
The problems such as flue gas obstruction, low-temperature corrosion；It is transferred in First Heat Exchanger after heat medium and flue gas heat exchange in second heat exchanger
As cooling medium.
The application method of above-mentioned useless activated coke Incineration in CFB system, includes the following steps：
(1) quartz sand is added in circulating fluidized bed incinerator；
(2) it opens igniter heated quartz sand and to 650~750 DEG C and is passed through First air；
(3) activated coke of giving up is transported in circulating fluidized bed incinerator through batcher and burns, when burning, is logical by secondary air channel
Enter Secondary Air；The heat part that useless activated coke burns release in recirculating fluidized bed is water cooled wall recycling；
(4) flue gas come out from circulating fluidized bed incinerator carries out heat recovery profit by tail flue gas heat reclaim unit
With；
(5) flue gas sequentially enters First Heat Exchanger cooling, desulfurization and dedusting is carried out into desulfation dust-extraction device, enters back into work again
Property coke adsorption tower remove organic matter；
(6) flue gas after air-introduced machine and the heating of the second heat exchanger again by entering chimney.
Quartz sand in the step (1) conducts heat mainly as heat carrier and useless activated coke, grain size 0-5mm,
Height in Circulation fluidized-bed furnace is 300-700mm；To achieve the effect that fully to conduct heat with useless activated coke.
Igniter heated quartz sand is opened in the step (2) to 650~750 DEG C, is primarily due to useless activated coke semicoke
Ignition point is relatively high, substantially at 650 DEG C or more.
Useless activated coke Incineration in CFB system provided by the invention, using useless activated coke as raw material, by reasonably matching
The arrangement of wind ratio and environmental protecting device, it can be achieved that useless activated coke efficient burning and non-pollution discharge, pass through drum and tail portion returned
The high temperature and high pressure steam of receiving apparatus recycling can be used for heat supply or power generation, to not only realize useless activated coke energy and clear
Clean utilizes, and increases the income of enterprise.
Description of the drawings
Fig. 1 is the structural schematic diagram of useless activated coke Incineration in CFB system provided by the invention；
Wherein, 1, circulating fluidized bed incinerator；2, water-cooling wall；3, secondary air channel；4, batcher；5, igniter；6, returning charge
Device；7, cyclone separator；8, denitrification apparatus (SNCR)；9, high temperature superheater；10, low temperature superheater；11, economizer；12, air
Preheater；13, First Heat Exchanger；14, desulfation dust-extraction device；15, activated coke adsorption tower；16, air-introduced machine；17, chimney；18,
Two heat exchangers；19, drum.
Specific implementation mode
The present invention is further explained with reference to specific embodiment.
As shown in Figure 1, a kind of useless activated coke Incineration in CFB system, including the Incineration in CFB that is sequentially arranged
Device, drum 19, denitrification apparatus 8, tail flue gas heat reclaim unit, First Heat Exchanger 13, desulfation dust-extraction device 14, activated coke
Adsorption tower 15, the second heat exchanger 18 and air-introduced machine 16, the flue gas that Incineration in CFB device generates pass through denitrification apparatus successively
8, tail flue gas heat reclaim unit, First Heat Exchanger 13, desulfation dust-extraction device 14 and activated coke adsorption tower 15, then pass through air inducing
Machine 16 is discharged into through the second heat exchanger 18 and chimney 17 in air after being drawn.
Incineration in CFB device, including circulating fluidized bed incinerator 1, connect with 1 bottom of circulating fluidized bed incinerator
Batcher 4 and igniter 5, the cyclone separator 7 that connect with the top of circulating fluidized bed incinerator 1 and setting is in cyclone separator
Material returning device 6 between 7 and circulating fluidized bed incinerator 1；The outlet of cyclone separator 7 is burnt by material returning device 6 with recirculating fluidized bed
Burn the connection of 1 bottom of stove；The internal face of circulating fluidized bed incinerator 1 arranges water-cooling wall 2, the opposite wall of circulating fluidized bed incinerator 1
Secondary air channel 3 is arranged on body；Tail flue gas heat reclaim unit is sequentially arranged high temperature superheater 9, low temperature superheater from top to bottom
10, economizer 11 and air preheater 12；Denitrification apparatus (SNCR) 8 is arranged in outlet and the whirlwind of circulating fluidized bed incinerator 1
Between separator 7；The lower half of drum 19 is connect with the entrance of water-cooling wall 2, the first half of the drum 19 respectively with water cooling
The outlet of wall 2, the outlet connection of economizer 11 and low temperature superheater 10 connect, and water enters drum 19 by the outlet of economizer 11
The first half, enter back into water-cooling wall 2 carry out water cycle；The entrance of economizer 11 is connect with waterworks；Air preheater 12
Entrance connect with pressure fan, the outlet of air preheater 12 is connect with primary air piping and secondary air channel 3, provide heating after one
Secondary wind and Secondary Air.
A certain amount of quartz sand is added in circulating fluidized bed incinerator 1, activated coke of giving up enters recycle stream by batcher 4
Fluidized-bed incineration stove 1 opens 5 heated quartz sand of igniter, and is sent into First air through primary air piping；In useless activated coke combustion process
By secondary air channel 3 to 1 injection of overfire air of circulating fluidized bed incinerator, combustion position is adjusted, nitrogen oxides is effectively inhibited
It generates；Water-cooling wall 2 absorbs the heat for activated coke burning release of giving up；Useless activated coke burning, which is crushed, generates flue gas, nitrogen oxidation in flue gas
Object is reacted with the reducing agent that denitrification apparatus 8 sprays generates nitrogen；Thicker part lease making cyclone separator 7 in ash particle in flue gas
It is come back in circulating fluidized bed incinerator 1 by material returning device 6 after separation, and the relatively fine ash particle in flue gas is then in desulfurization and dedusting
It is removed in device 14.
Meanwhile the heat of the useless activated coke burning release of chemical industry is successively by high temperature superheater 9, low temperature superheater 10, economizer
11, air preheater 12 and First Heat Exchanger 13 recycle；Then, the flue gas SO that the useless activated coke burning of chemical industry generates2, a huge sum of money
Belong to the pollutants such as Hg to be removed in desulfation dust-extraction device 14, undecomposed organic gas quilt in activated coke adsorption tower 15 in flue gas
Absorption, to which the flue gas from circulating fluidized bed incinerator 1 is through denitrification apparatus (SNCR) 8, desulfation dust-extraction device 14 and activated coke
Become clean flue gas after the processing of adsorption tower 15, be drawn by air-introduced machine 16, after the heating of the second heat exchanger 18, is discharged through chimney 17
Into air.
First Heat Exchanger 13 is connected with the second heat exchanger 18, the outlet of First Heat Exchanger 13 and entering for the second heat exchanger 18
Mouth is connected, and First Heat Exchanger 13 falls to a certain temperature flue gas with after flue gas heat exchange, is convenient for 14 normal work of desulfation dust-extraction device
Make, the second heat exchanger 18 is in addition transferred to after the heat of the cooling Absorption of Medium flue gas in First Heat Exchanger 13 and is situated between as heating
Matter, the flue gas for heating 17 entrance of chimney, to improve discharge flue-gas temperature, avoid flue gas obstruction, low-temperature corrosion the problems such as；The
It is transferred to after heat medium and flue gas heat exchange in two heat exchangers 18 in First Heat Exchanger 13 as cooling medium.
Drum 19 divides for the first half and lower half, the outlet of the first half and economizer 11, the outlet of water-cooling wall 2 and low temperature mistake
Hot device 10 connects, and lower half is connect with the entrance of water-cooling wall 2.Drum 19 is used for steam-water separation, and the steam separated leads to successively
Cross low temperature superheater 10, high temperature superheater 9 is connect with power equipment, be used for power generation；The water separated is re-introduced into
Water-cooling wall 2 carries out water cycle, absorbs the heat that the useless activated coke in part burns release in recirculating fluidized bed.
Application examples 1
Table 1 is the useless activated coke Characterization Data of typical chemical industry, is burnt with useless activated coke recirculating fluidized bed provided by the invention
Burning system carries out burning disposal.
The useless activated coke Characterization Data of the typical chemical industry of table 1
The quartz sand of 40cm thickness is added in circulating fluidized bed incinerator 1, is sent into 180Nm3/ h First airs open igniter 5
Quartz sand is heated to 650 DEG C or so.The useless active coke fuel of chemical industry feeds circulating fluidized bed incinerator 1 through batcher 4 and burns,
When burning 180Nm is passed through through secondary air channel 33/ h Secondary Airs, 1 outlet temperature of circulating fluidized bed incinerator are maintained at 900 DEG C or so.
A concentration of 11g/Nm of ash particle in the flue gas that the useless activated coke burning of chemical industry generates3, it is after the separation of cyclone separator 7
220mg/Nm3；The useless activated coke of chemical industry, which is burnt, simultaneously generates a large amount of pollutants, contaminant component nitrogen oxides (NO in flue gasx)、SO2
The concentration of Ji bioxin is respectively 140mg/Nm3、326mg/Nm3And 0.062ng/Nm3；It is come out from circulating fluidized bed incinerator 1
Flue gas nitrogen oxides (NO after denitrification apparatus (SNCR) 8 sprays AMMONIA TREATMENTx) concentration is reduced to 40mg/Nm3。
Flue gas (temperature is about 900 DEG C) from circulating fluidized bed incinerator 1 is by high temperature superheater 9, low temperature superheater
Temperature is reduced to 450 DEG C or so after 10 coolings, and secondly temperature is down to 150 after economizer 11, the absorption heat of air preheater 12
DEG C or so, most temperature is about 120 DEG C or so after the heat exchange of heat exchanger 13 afterwards, which is less than acid dew-point temperature, helps to improve
The efficiency of dust collection and desulfuration efficiency of desulfation dust-extraction device 14.
After flue gas is removed using desulfation dust-extraction device 14, ash particle concentration is only 4mg/Nm3, SO2Concentration is reduced to 20mg/
Nm3, most the concentration of bioxin is about 0.0097ng/Nm after the absorption of activated coke adsorption tower 15 afterwards3Left and right.
Treated flue gas is clean flue gas, is drawn by air-introduced machine 16, the second heat exchanger 18 heats flue gas to after 150 DEG C
It is discharged into air through chimney 17.
The above application examples are only used for illustrating the inventive concept of the present invention, rather than the restriction to rights protection of the present invention,
Every technology and methods according to the present invention any simple modification, equivalent change and modification substantially made to the above embodiment,
In the range of the technology and methods scheme for still falling within the present invention.
Claims (8)
1. a kind of useless activated coke Incineration in CFB system, including the Incineration in CFB device, drum, the tail that are sequentially arranged
Portion's fuel gas heat recycling device, First Heat Exchanger, desulfation dust-extraction device, activated coke adsorption tower, air-introduced machine and the second heat exchanger.
2. useless activated coke Incineration in CFB system as described in claim 1, which is characterized in that the recirculating fluidized bed
Incinerator include circulating fluidized bed incinerator, the batcher being connect with circulating fluidized bed incinerator bottom and igniter, with follow
The separator of circulation fluidized-bed incineration furnace roof portion connection and the material returning device being arranged between separator and circulating fluidized bed incinerator.
3. useless activated coke Incineration in CFB system as claimed in claim 2, which is characterized in that the recirculating fluidized bed
The height of incinerator is 25~50 meters.
4. useless activated coke Incineration in CFB system as claimed in claim 2, which is characterized in that the recirculating fluidized bed
Arrange that several secondary air channels, the Secondary Air of secondary air channel input account in circulating fluidized bed incinerator on the opposite wall of incinerator
The 40-60% of total blast volume, the percentage are volume ratio.
5. useless activated coke Incineration in CFB system as claimed in claim 2, which is characterized in that the recirculating fluidized bed
Ignition temperature in incinerator is 850~950 DEG C.
6. useless activated coke Incineration in CFB system as claimed in claim 2, which is characterized in that the useless activated coke is followed
Ring fluidizing bed burning system further includes the denitrification apparatus being arranged between the outlet of circulating fluidized bed incinerator and separator.
7. useless activated coke Incineration in CFB system as described in claim 1, which is characterized in that the tail flue gas heat
Amount retracting device is sequentially arranged high temperature superheater, low temperature superheater, economizer and air preheater from top to bottom.
8. useless activated coke Incineration in CFB system as described in claim 1, which is characterized in that the First Heat Exchanger
It is connected with the second heat exchanger；It is transferred to the second heat exchanger conduct after the heat of cooling Absorption of Medium flue gas in First Heat Exchanger
Heat medium；It is transferred to after heat medium and flue gas heat exchange in second heat exchanger in First Heat Exchanger as cooling medium.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111530216A (en) * | 2020-06-12 | 2020-08-14 | 中冶赛迪技术研究中心有限公司 | Flue gas quenching and dust removing device for inhibiting dioxin regeneration and control method |
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