CN206746318U - A kind of flue gas waste heat recovery wet method integrated purifying system - Google Patents
A kind of flue gas waste heat recovery wet method integrated purifying system Download PDFInfo
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- CN206746318U CN206746318U CN201720002345.XU CN201720002345U CN206746318U CN 206746318 U CN206746318 U CN 206746318U CN 201720002345 U CN201720002345 U CN 201720002345U CN 206746318 U CN206746318 U CN 206746318U
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Abstract
The utility model discloses a kind of flue gas waste heat recovery wet method integrated purifying processing system, including flue gas cool-down heat-exchanger rig (1), fume dust remover (2), booster fan (3), the pre- desulfuring and denitrifying apparatus of wet type, smoke re-heater (9), wet type deep desulfuration denitrification apparatus.The purpose of the heavy metals such as the utility model can be realized under low-temperature condition while remove dirt in flue gas, nitrogen oxides, oxysulfide, microparticle dirt and mercury, can become harmless N by the NOx in flue gas2Discharge.Avoid because the escaping of ammonia, the ammonium hydrogen sulfate caking that are brought using SCR high temperature denitration technologies are blocked and failure SCR catalyst the problem such as is difficult to dispose as dangerous waste, simultaneously because of the recycling carried out to the waste heat in flue gas, the benefit of flue gas integrated purifying processing is further improved, has reached and has not only saved but also the effect of emission reduction.
Description
Technical field
A kind of flue gas waste heat recovery that the utility model belongs in energy-conserving and environment-protective field, particularly Air Pollution Control field
The processing system of Wet smoke integrated purifying.
Background technology
The pollution of acid rain and its caused by endanger one of the main Environmental Problems for turning into countries in the world concern.SO2And NOx
It is two kinds of pollution sources that discharge capacity is most, harmfulness is maximum.Nitrogen oxides can also be formed photochemical pollution, produce greenhouse effects,
Damage the ozone layer, have intoxicating effect to human body.
In recent years in the practice to the smoke pollution emission control engineering such as coal-burning boiler, Industrial Stoves, each side is gradual
Recognize and smoke pollution emission control be used alone dedusting, desulphurization and denitration technology, for example, by SNCR and SCR carry out denitration,
Electric precipitation (or electric bag dust or bag-type dusting), wet desulphurization (having part dry method and semi-dry desulphurization), wet-esp or pipe
Beam formula demisting dedusting etc. is difficult to meet the environment protection emission requirement increasingly improved, and dedusting, desulphurization and denitration and removing Hg is used alone
Deng the control technology of the hazardous contaminants such as heavy metal, equipment complexity be present, it is difficult in maintenance, floor space is big, investment and fortune
The difficulties such as row expense height.
Therefore, in consideration of it, being necessary to provide a kind of new gas pollution control technology with flue gas integrated purifying function
To adapt to growing energy-conservation and environment protection emission requirement.
Utility model content
The utility model is in order to overcome wet desulphurization in the prior art that SCR or SNCR must be coordinated to can be only achieved NOxRow
The deficiency of requirement is put, SNCR denitration is inefficient can not to meet emission request, SCR catalyst poisoning and deactivation, the escaping of ammonia and SCR
The problems such as catalyst regeneration process difficulty is big, harm is big, and dead catalyst can only be handled as dangerous waste, and after-cost is high,
While in order to effectively mitigate because SCR catalyst is to the SO in flue gas2Oxidation causes SO in flue gas3Generation greatly improve, so as to produce
Raw more ammonium hydrogen sulfates block the series of problems such as air preheater, there is provided a kind of Wet smoke integrated purifying processing system.
To achieve the above object, the technical scheme that the utility model is taken is：
A kind of flue gas waste heat recovery wet method integrated purifying processing system, including flue gas cool-down heat-exchanger rig, flue gas ash removal dress
Put, booster fan, the pre- desulfuring and denitrifying apparatus of wet type, smoke re-heater, wet type deep desulfuration denitrification apparatus, wherein,
The pre- desulfuring and denitrifying apparatus of wet type includes alkali liquor absorption slurries preparation unit, slurry storage tank, slurry feeding pump, wet type
Pre- desulphurization denitration tower；
Wet type deep desulfuration denitrification apparatus includes denitration absorbing liquor preparation and storage element, denitration liquid delivery pump, wet type are deep
Spend desulphurization denitration tower, circulating pump, saturation slurries regeneration unit；
The flue gas cool-down heat-exchanger rig, fume dust remover, booster fan, smoke re-heater, the pre- desulphurization denitration of wet type
Tower, wet type deep desulfuration denitrating tower, saturation slurries regeneration unit pass sequentially through flue or pipeline connection；It is prepared by alkali liquor absorption slurries
The pre- desulphurization denitration tower of unit, slurry storage tank, slurry feeding pump, wet type is sequentially connected；Denitration absorbing liquor prepares and storage element
It is connected by circulating pump with wet type deep desulfuration denitrating tower；Saturation slurries regeneration unit passes through denitration liquid delivery pump and wet type depth
Desulphurization denitration tower is connected to form circulation.
Further, dedusting demister is set at the top of the wet type deep desulfuration denitrating tower, and the dedusting demister is flat board
Formula demister, ridge type demister, bundled tube dedusting demister or electrostatic bundled tube dedusting demister.
Further, the flue gas cool-down heat-exchanger rig is gas-liquid heat-exchange or gas-gas heat exchanger.
Further, the smoke re-heater is gas-gas heat exchanger.
Further, the fume dust remover is electric cleaner, electrostatic fabric filter or sack cleaner.
The beneficial effects of the utility model are：
The utility model can be realized under low-temperature condition while remove dirt in flue gas, nitrogen oxides, oxysulfide, microparticle dirt
And the purpose of the heavy metal such as mercury, the NOx in flue gas can be become harmless N2Discharge.Avoid because using SCR high temperature denitrations
The escaping of ammonia that technology is brought, ammonium hydrogen sulfate caking block and failure SCR catalyst the problem such as is difficult to dispose as dangerous waste, simultaneously
Because of the recycling carried out to the waste heat in flue gas, the benefit of flue gas integrated purifying processing is further improved, has been reached both
Energy-conservation and the effect of emission reduction.
Brief description of the drawings
Fig. 1 is system composition schematic diagram of the present utility model.
Embodiment
Such as Fig. 1, a kind of flue gas waste heat recovery Wet smoke integrated purifying system of the present utility model, including flue gas cool-down change
Thermal 1, fume dust remover 2, booster fan 3, the pre- desulfuring and denitrifying apparatus of wet type, smoke re-heater 9, wet type deep desulfuration take off
Nitre device, wherein,
The pre- desulfuring and denitrifying apparatus of wet type include alkali liquor absorption slurries preparation unit 4, slurry storage tank 5, slurry feeding pump 6,
The pre- desulphurization denitration tower 7 of wet type；
Wet type deep desulfuration denitrification apparatus includes denitration absorbing liquor and prepared and storage element 12, denitration liquid delivery pump 13, wet
Formula deep desulfuration denitrating tower 8, circulating pump 10, saturation slurries regeneration unit 11；
Flue gas cool-down heat-exchanger rig 1, fume dust remover 2, booster fan 3, smoke re-heater 9, the pre- desulphurization denitration of wet type
Tower 7, wet type deep desulfuration denitrating tower 8, saturation slurries regeneration unit 11 pass sequentially through flue or pipeline connection；Alkali liquor absorption is starched
The pre- desulphurization denitration tower 7 of liquid preparation unit 4, slurry storage tank 5, slurry feeding pump 6, wet type is sequentially connected；It is prepared by denitration absorbing liquor
And storage element 12 is connected by circulating pump 10 with wet type deep desulfuration denitrating tower 8；Saturation slurries regeneration unit 11 passes through denitration
Liquid delivery pump 13 is connected to form circulation with wet type deep desulfuration denitrating tower 8.
The pre- desulphurization denitration tower 7 of wet type can be equipped with rotation and converge coupled desulfurization tower (SPC-3D), can be spray column, can also
It is bubble tower, wet type desulfurizing denitrating tower is provided with more circulation slurry pumps, can met according to wet type desulfurizing denitrating tower exiting flue gas
Middle SO2Concentration carries out the requirement of real-time adjustment control.Absorption slurries in the pre- desulphurization denitration tower 7 of wet type are alkaline slurry, specifically
For desulfurization alkaline slurry, including ammonia spirit, calcium oxide, calcium carbonate, magnesia and sodium carbonate, sodium hydroxide
Wet type deep desulfuration denitrating tower 8 includes the rotation remittance coupling device (patent No. arranged from bottom to top：
CN201735324U), packing layer, equal liquid distributor and dedusting demister.Wherein packing layer is multilayer, is arranged on every layer of packing layer
One efficient equal liquid distributor.Desulphurization denitration slurries in depth wet type desulfurizing denitrating tower in 8 bottom slurry ponds are ferrous salt, Asia
The mixed solution of sulfate, EDTA and catalyst, specific ferrous salt is ferrous sulfate, frerrous chloride, ferrous nitrate, sulfurous
Hydrochlorate is sodium sulfite, potassium sulfite, and EDTA is EDTA-2Na and EDTA-4Na.Catalyst is Powdered Activated Carbon, and its pH value is not
Less than 7,200 ㎡ of specific surface area/g~1100 ㎡/g, granularity is the mesh of 80 mesh~400, and its addition is 0.0%wt~1.0%wt.
Can add catalyst in above-mentioned desulphurization denitration slurries can not also add.
Saturation slurries regeneration unit 11 includes evaporation concentration device or freezing and crystallizing device and centrifugal separating device, is used for
Isolate the solid-states such as sulphite or the sulfate in the desulphurization denitration slurries in the bottom slurry pond of wet type deep desulfuration denitrating tower 8
Product.The liquid slurry isolated returns to repetitive cycling in wet type deep desulfuration denitrating tower 8 by denitration liquid delivery pump 13 and used.
Prepared by denitration absorbing liquor and storage element 12 is used to prepare storage desulphurization denitration slurries, using circulating pump 10 by desulphurization denitration slurries
It is transported in wet type deep desulfuration denitrating tower 8.
It can be realized under low-temperature condition by cleaning system of the present utility model while remove dirt in flue gas, nitrogen oxides, sulphur
The purpose of the heavy metals such as oxide, microparticle dirt and mercury, the NO in flue gas can be become harmless N2Discharge.Simultaneously because to cigarette
Waste heat in gas is recycled, and is further improved the benefit of flue gas integrated purifying processing, has been reached and not only saved but also subtract
The effect of row.
The filler of packing layer selects the spherical hollow ball dumped packing of PP materials, is 50 ㎡/m than surface3~800 ㎡/m3,
Bulk density is bulk density 20kg/m3~200kg/m3, 2~6 layers of filler filling, per layer height about 0.1m~1.5m, every layer is filled out
The efficient equal liquid distributor of material top arrangement.
Dedusting demister can be plate-type dedusting demister, ridge type dedusting demister, or bundled tube dedusting removes
Day with fog, or electrostatic bundled tube dedusting demister, preferably the bundled tube dedusting demister (patent No.：CN 104368215B)
Or electrostatic bundled tube dedusting demister (application number CN201620105537.9).
High temperature original flue gas enters flue gas cool-down heat-exchanger rig 1 by flue, and flue gas after the cooling that exchanges heat into flue gas by removing
Dirt device 2, the flue gas after removing dust enter booster fan 3 by flue, and flue gas enters flue gas reheat after the supercharging of booster fan 3
Device 9, subsequently into the pre- desulphurization denitration tower 7 of wet type, flue gas enters smoke re-heater 9 after the pre- desulphurization denitration processing of wet type and then entered
It is point to enter wet type deep desulfuration denitrating tower 8, the pre- desulphurization denitration tower 7 of wet type and wet type deep desulfuration denitrating tower 8 with smoke re-heater 9
It is body or merging into a single whole.Smoke re-heater 9 is gas-gas heat exchanger.
Prepared by alkali liquor absorption slurries preparation unit 4 absorbs slurries, and absorption slurries are alkaline slurry, specially desulfurization alkalescence slurry
Liquid, including ammonia spirit, calcium oxide, calcium carbonate, magnesia and sodium carbonate, sodium hydroxide.Absorb slurries and be transported to slurries
Holding vessel 5, the slurries prepared are transported in the slurry pool of the pre- desulphurization denitration tower 7 of wet type by slurry feeding pump 6.
A kind of purification method based on the flue gas waste heat recovery wet method integrated purifying processing system, comprises the following steps：
Step 1：It will contain the heavy metal pollutions such as oxysulfide, nitrogen oxides, dirt, mercury using flue gas cool-down heat-exchanger rig 1
The flue-gas temperature of thing is reduced to 180 DEG C of ＜ for 180 DEG C by ＞；
Step 2：The dust in the flue gas after cooling is removed using fume dust remover 2；Fume dust remover 2 removes for electricity
Dirt device, electrostatic fabric filter or sack cleaner；
Step 3：Smoke re-heater 9 will be sent into after the flue gas supercharging after dedirt using booster fan 3, flue gas through exchanging heat again
The pre- desulphurization denitration tower 7 of wet type is returned to after cooling, carries out pre- desulphurization denitration, the desulfuration efficiency of the control pre- desulphurization denitration tower 7 of wet type exists
Exchanged heat after 40%~98% with smoke re-heater 9 and enter back into wet type deep desulfuration denitrating tower 8 through flue after the reheating that heats up, even
It is changed into neat stress after continuous progress desulphurization denitration demisting, depth dust removal process and enters smoke stack emission through flue.
Absorption slurries in the pre- desulphurization denitration tower 7 of wet type are alkaline slurry, specially desulfurization alkaline slurry, including ammoniacal liquor is molten
Liquid, calcium oxide, calcium carbonate, magnesia and sodium carbonate, sodium hydroxide.
8 desulphurization denitration slurries are ferrous salt, sulphite, EDTA and catalyst in depth wet type desulfurizing denitrating tower
Mixed solution, specific ferrous salt are ferrous sulfate, frerrous chloride, ferrous nitrate, and sulphite is sodium sulfite, sulfurous acid
Potassium, EDTA are EDTA-2Na and EDTA-4Na.Catalyst is Powdered Activated Carbon, and its pH value is not less than 7,200 ㎡ of specific surface area/g
~1100 ㎡/g, granularity are the mesh of 80 mesh~400, and its addition is 0.0%wt~1.0%wt.
Step 4：The slurries of slurry pool gradual saturation of meeting after desulphurization denitration in wet type deep desulfuration denitrating tower 8, by saturation
Absorption slurries afterwards are sent into desulphurization denitration saturation slurries regeneration unit 11, and the desulphurization denitration slurries through reducing/regenerating continue to return
Recycled in wet type deep desulfuration denitrating tower 8.
When using ammoniacal liquor to adjust source as system pH value in deep desulfuration denitrating tower 8, then concentrated using evaporative crystallization laggard
Row centrifuges out the mixture of solid byproducts ammonium sulfate or ammonium sulfite and ammonium sulfate；Adopted when in deep desulfuration denitrification apparatus
Adjust source by the use of soda as system pH value, then using centrifuged out after freezing and crystallizing solid byproducts sodium sulphate or sodium sulphate and
The mixture of sodium sulfite.
Step 5：Desulphurization denitration slurries in wet type deep desulfuration denitrating tower 8 recycle with continuous, the sulphur in slurries
Acid group can be built up, when in desulphurization denitration slurries sulfate concentration reach >=1.0mo l/L after, utilize the regeneration of saturation slurries single
The 20%-50% of saturation slurries is carried out discharge opeing processing by member 11, and separation is centrifuged after being concentrated using evaporative crystallization or using cold
Mode is centrifuged after freezing crystalline substance.The solid product of sulphite or sulfate is isolated, the liquid slurry isolated returns to de-
In sulphur denitration saturated solution regenerative system after regenerating, modulating, enter repetitive cycling in wet type deep desulfuration denitrating tower 8 and use.
Deep desulfuration denitration saturation slurries regeneration temperature is 40 DEG C~80 DEG C in wet type deep desulfuration denitrating tower 8, during regeneration
Between 15min~90min.Activated carbon is added in desulphurization denitration slurries regenerative process and makees catalyst, activated carbon addition is 1.0%wt
~5.0%wt, the pH value of activated carbon is 2~11, and than 200 ㎡ of surface/g~500 ㎡/g, wear-resisting intensity is not less than 85%.
Embodiment 1
Containing 5300mg/Nm3SO2、NOxAbout 600mg/Nm3、29g/Nm3Dirt and 0.041mg/Nm3Mercury, 380 DEG C of combustion
Coal burning boiler high-temperature flue gas, first carry out heat exchange through flue gas cool-down heat-exchanger rig 1 and cool to 140 DEG C, enter flue gas after carrying out recuperation of heat
Dust arrester 2, smoke re-heater 9 (being herein gas-gas heat exchanger) is then sent into after booster fan 3 and carries out secondary heat exchange, flue gas
Enter the pre- desulphurization denitration tower 7 of wet type through flue after further cooling to about 90 DEG C, flue gas flue gas after the processing of pre- desulphurization denitration passes through
Flue, which enters smoke re-heater 9 (being herein gas-gas heat exchanger), to carry out entering deep desulfuration denitrating tower after flue gas is warming up to about 90 DEG C
In 8, enter smoke stack emission through flue after deep desulfuration denitration, dedusting demisting for neat stress.
In wet type deep desulfuration denitrating tower filler select PP materials spherical hollow ball dumped packing, than surface be 300 ㎡/
m3, bulk density is bulk density 50kg/m3, filler loads 6 layers, and per layer height about 0.4m, arrangement is efficiently equal above every layer of filler
Liquid distributor.
Slurries are the slurries of lime stone or lime in pre- system for desulfuration and denitration, by control ph between 5~6, control
Liquid-gas ratio is 8~18, is 60%~95% so as to control desulfuration efficiency in pre- desulphurization denitration tower, and pH value, which controls, in the present embodiment exists
5.8, when liquid-gas ratio is 12, desulfuration efficiency 90%.
Desulphurization denitration slurries in wet type deep desulfuration denitrating tower 8 are ferrous sulfate, sodium sulfite, EDTA-2Na and ratio
The activated carbon mixed solution of 450 ㎡ of surface/g 325 mesh, the addition of activated carbon is 0.15%wt.Sodium carbonate is used as depth
PH value regulation source in system for desulfuration and denitration.
When the gradual saturation of desulphurization denitration slurries loses desulphurization denitration ability in wet type deep desulfuration denitrating tower, start to full
Regeneration treatment is carried out with desulphurization denitration slurries, 80 DEG C of regeneration temperature, recovery time 15m i n, regenerates slurry pH value 6.7, saturation
Addition is than 400 ㎡ of surface/g, the activated carbon 2%wt of 200 mesh in slurries regenerative process.
As sulfate concentration about 1.51mo l/L in saturation desulphurization denitration slurries, desulphurization denitration saturated absorption liquid is carried out
Discharge opeing is handled, and the saturation desulphurization denitration slurries of about a quarter are carried out into freezing and crystallizing, centrifuge out sodium sulfite and sulfuric acid
The mixture of sodium is accessory substance, and the liquid slurry isolated is returned in desulphurization denitration saturated solution regenerative system after regenerating, modulating,
Repetitive cycling in wet type deep desulfuration denitrification apparatus is entered to use.
In the above-described example, the discharge index of neat stress is 27mg/Nm3SO2、49mg/Nm3NOx, 4.1mg/Nm3's
Dirt, 0.019mg/Nm3Mercury.
Embodiment 2
Containing 3987mg/Nm3SO2、NOxAbout 1035mg/Nm3、17g/Nm3245 DEG C of dirt coking high-temperature flue gas, first through cigarette
Gas temperature-reducing heat-exchange device 1 carries out heat exchange (herein using gas-liquid heat exchange device) and cools to 120 DEG C, enters flue gas after carrying out recuperation of heat
Dust arrester 2, smoke re-heater 9 (gas-gas heat exchanger) is then sent into after booster fan 3 and carries out secondary heat exchange, flue gas is further
Enter the pre- desulphurization denitration tower 7 of wet type through flue after cooling to about 76 DEG C, flue gas flue gas after the processing of pre- desulphurization denitration enters through flue
Enter smoke re-heater 9 (gas-gas heat exchanger) after flue gas is warming up to about 76 DEG C enter in deep desulfuration denitrating tower 8, taken off through depth
Enter smoke stack emission through flue after sulphur denitration, dedusting demisting for neat stress.
Filler selects the regular corrugation plate filler of PP materials in wet type deep desulfuration denitrating tower, is 500 ㎡/m than surface3,
Bulk density is bulk density 120kg/m3, filler loads 2 layers, and per layer height about 1.2m, arrangement is efficiently equal above every layer of filler
Liquid distributor.
Slurries are deposed ammonia solution in pre- desulphurization denitration tower, by control ph 5.7~7.5, control liquid-gas ratio for 3~
10, it is 50%~90% so as to control desulfuration efficiency in pre- desulphurization denitration tower.PH value control is 7.1 in the present embodiment, liquid-gas ratio
For 5 when, desulfuration efficiency 88%.
Desulphurization denitration slurries in wet type deep desulfuration denitrating tower are ferrous sulfate, sodium sulfite, EDTA-2Na and ratio
The activated carbon mixed solution of 670 ㎡ of surface/g 325 mesh, the addition of activated carbon is 0.10%wt.Deposed ammonia is used as depth
PH value regulation source in system for desulfuration and denitration.
When the gradual saturation of desulphurization denitration slurries loses desulphurization denitration ability in wet type deep desulfuration denitrating tower, start to full
Regeneration treatment is carried out with desulphurization denitration slurries, 60 DEG C, recovery time 35min of regeneration temperature, regenerates slurry pH value 6.37, saturation slurry
Addition is than 220 ㎡ of surface/g, the activated carbon 5%wt of 325 mesh in liquid regenerative process.
As sulfate concentration about 2.6mol/L in saturation desulphurization denitration slurries, desulphurization denitration saturated absorption liquid is arranged
Liquid processing, the mixture for about 1/3rd saturation desulphurization denitration slurries are evaporated into crystallization, centrifuging out ammonium sulfate are
Accessory substance, the liquid slurry isolated are returned in desulphurization denitration saturated solution regenerative system after regenerating, modulating, and enter wet type depth
Repetitive cycling in desulfuring and denitrifying apparatus is spent to use.
In the above-described example, the discharge index of neat stress is 82mg/Nm3SO2、100mg/Nm3NOx、10mg/Nm3's
Dirt.
Embodiment 3
Containing 2870mg/Nm3SO2、NOxAbout 374mg/Nm3、19g/Nm3325 DEG C of dirt sintering flue gas, first dropped through flue gas
Warm heat-exchanger rig gas-liquid heat-exchange 1 carries out heat exchange and cools to 180 DEG C, enters fume dust remover 2, Ran Houjing after carrying out recuperation of heat
The progress secondary heat exchange flue gas of smoke re-heater gas-gas heat exchanger 9 is sent into after booster fan 3 further to cool to after about 95 DEG C through cigarette
Road enters the pre- desulphurization denitration tower 7 of wet type, and flue gas flue gas after the processing of pre- desulphurization denitration changes through flue into smoke re-heater gas gas
Hot device 9 enter after flue gas is warming up to 95 DEG C in deep desulfuration denitrating tower 8, is net after deep desulfuration denitration, dedusting demisting
Flue gas enters smoke stack emission through flue.
Filler selects the regular corrugation plate filler of PP materials in wet type deep desulfuration denitrating tower, is 200 ㎡/m than surface3,
Bulk density is bulk density 45kg/m3, filler loads 3 layers, and per layer height about 0.7m, arrangement is efficiently uniform above every layer of filler
Liquid device.
Slurries are magnesium oxide solution in pre- system for desulfuration and denitration, and for control ph between 5.4~7.2, it is 3 to control liquid-gas ratio
~17, it is 40%~98% to control desulfuration efficiency in pre- desulphurization denitration tower；PH value control is 5.4 in the present embodiment, liquid-gas ratio 3
When, desulfuration efficiency 98%.
Desulphurization denitration slurries in wet type deep desulfuration denitrating tower are frerrous chloride, sodium sulfite, EDTA-4Na and ratio
The activated carbon mixed solution of 800 ㎡ of surface/g 120 mesh, the addition of activated carbon is 0.35%wt.Sodium hydroxide is used to be deep
The pH value regulation source spent in system for desulfuration and denitration.
When the gradual saturation of desulphurization denitration slurries loses desulphurization denitration ability in wet type deep desulfuration denitrating tower, start to full
Enter with desulphurization denitration slurries.Row regeneration treatment, 60 DEG C, recovery time 35min of regeneration temperature, regenerate slurry pH value 6.37, saturation
Addition is than 500 ㎡ of surface/g, the activated carbon 2.8%wt of 325 mesh in slurries regenerative process.
As sulfate concentration about 1.0mol/L in saturation desulphurization denitration slurries, desulphurization denitration saturated absorption liquid is arranged
Liquid processing, about 1/5th saturation desulphurization denitration slurries are subjected to freezing and crystallizing, centrifuge out sodium sulfite accessory substance, point
The liquid slurry separated out is returned in desulphurization denitration saturated solution regenerative system after regenerating, modulating, and is entered wet type deep desulfuration and is taken off
Repetitive cycling uses in nitre device.
In the above-described example, the discharge index of neat stress is 18mg/Nm3 SO2,49mg/Nm3 NOx, 5mg/Nm3
Dirt.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (4)
1. a kind of flue gas waste heat recovery wet method integrated purifying processing system, it is characterised in that including flue gas cool-down heat-exchanger rig
(1), fume dust remover (2), booster fan (3), the pre- desulfuring and denitrifying apparatus of wet type, smoke re-heater (9), wet type deep desulfuration
Denitrification apparatus, wherein,
The pre- desulfuring and denitrifying apparatus of wet type includes alkali liquor absorption slurries preparation unit (4), slurry storage tank (5), slurry feeding pump
(6), the pre- desulphurization denitration tower (7) of wet type；
Wet type deep desulfuration denitrification apparatus includes denitration absorbing liquor and prepared and storage element (12), denitration liquid delivery pump (13), wet
Formula deep desulfuration denitrating tower (8), circulating pump (10), saturation slurries regeneration unit (11)；
The flue gas cool-down heat-exchanger rig (1), fume dust remover (2), booster fan (3), smoke re-heater (9), wet type are pre-
Desulphurization denitration tower (7), wet type deep desulfuration denitrating tower (8), saturation slurries regeneration unit (11) pass sequentially through flue or pipeline connects
Connect；The pre- desulphurization denitration tower (7) of alkali liquor absorption slurries preparation unit (4), slurry storage tank (5), slurry feeding pump (6), wet type according to
It is secondary to be connected；Prepared by denitration absorbing liquor and storage element (12) is connected by circulating pump (10) with wet type deep desulfuration denitrating tower (8)；
Saturation slurries regeneration unit (11) is connected to form circulation by denitration liquid delivery pump (13) and wet type deep desulfuration denitrating tower (8).
2. flue gas waste heat recovery wet method integrated purifying processing system as claimed in claim 1, it is characterised in that the wet type is deep
Spend and dedusting demister be set at the top of desulphurization denitration tower (8), the dedusting demister be Flat defroster, ridge type demister,
Bundled tube dedusting demister or electrostatic bundled tube dedusting demister.
3. flue gas waste heat recovery wet method integrated purifying processing system as claimed in claim 1, it is characterised in that the flue gas drop
Warm heat-exchanger rig (1) is gas-liquid heat-exchange or gas-gas heat exchanger.
4. flue gas waste heat recovery wet method integrated purifying processing system as claimed in claim 1, it is characterised in that the flue gas is again
Hot device (9) is gas-gas heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720002345.XU CN206746318U (en) | 2017-01-03 | 2017-01-03 | A kind of flue gas waste heat recovery wet method integrated purifying system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621808A (en) * | 2017-01-03 | 2017-05-10 | 北京清新环境技术股份有限公司 | Wet type integrated purification system and method for recovery of residual heat in flue gas |
| CN108119903A (en) * | 2017-12-27 | 2018-06-05 | 四川天壹环保科技有限公司 | It is a kind of to utilize domestic waste incineration burnt oil treatment process during burning domestic garbage |
| CN109107384A (en) * | 2018-10-11 | 2019-01-01 | 江苏三井环保股份有限公司 | A kind of flue-gas dust-removing and desulfurization denitrification integrated device |
| CN110385007A (en) * | 2019-07-16 | 2019-10-29 | 河南迪诺环保科技股份有限公司 | A kind of de- whitening method of the flue gas improving heat utilization rate |
| WO2021088526A1 (en) * | 2019-11-05 | 2021-05-14 | 中冶长天国际工程有限责任公司 | Flue gas multi-pollutant synergistic purification process and apparatus |
| RU2796494C1 (en) * | 2019-11-05 | 2023-05-24 | Чжуне Чантянь Интернэшнл Инджиниринг Ко., Лтд. | Method and installation for joint flue gas cleaning with several pollutants |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621808A (en) * | 2017-01-03 | 2017-05-10 | 北京清新环境技术股份有限公司 | Wet type integrated purification system and method for recovery of residual heat in flue gas |
| CN108119903A (en) * | 2017-12-27 | 2018-06-05 | 四川天壹环保科技有限公司 | It is a kind of to utilize domestic waste incineration burnt oil treatment process during burning domestic garbage |
| CN109107384A (en) * | 2018-10-11 | 2019-01-01 | 江苏三井环保股份有限公司 | A kind of flue-gas dust-removing and desulfurization denitrification integrated device |
| CN110385007A (en) * | 2019-07-16 | 2019-10-29 | 河南迪诺环保科技股份有限公司 | A kind of de- whitening method of the flue gas improving heat utilization rate |
| WO2021088526A1 (en) * | 2019-11-05 | 2021-05-14 | 中冶长天国际工程有限责任公司 | Flue gas multi-pollutant synergistic purification process and apparatus |
| RU2796494C1 (en) * | 2019-11-05 | 2023-05-24 | Чжуне Чантянь Интернэшнл Инджиниринг Ко., Лтд. | Method and installation for joint flue gas cleaning with several pollutants |
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