CN110465171A - Low temperature liquid phase cyclone desulfuration denitration dust-removing integrated technique - Google Patents
Low temperature liquid phase cyclone desulfuration denitration dust-removing integrated technique Download PDFInfo
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- CN110465171A CN110465171A CN201910765210.2A CN201910765210A CN110465171A CN 110465171 A CN110465171 A CN 110465171A CN 201910765210 A CN201910765210 A CN 201910765210A CN 110465171 A CN110465171 A CN 110465171A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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Abstract
The invention discloses a kind of low temperature liquid phase cyclone desulfuration denitration dust-removing integrated technique, processing step includes the spraying mechanism opened in absorption tower, and composite absorber is sprayed from spraying mechanism；Boiler exhaust gas is delivered to cooling device after booster fan is pressurized, after exhaust temperature is down to 80 DEG C or less, then is conveyed into absorb the bottom of the tower region；Tail gas enters behind absorption tower from bottom to top successively by air-flow eddy flow uniform device, spraying mechanism and the processing for restraining deduster；Tail gas is discharged through absorption tower tower top chimney after processing.The present invention replaces conventional gas phase reaction using desulphurization denitration liquid phase reactor；Liquid phase cyclone technique is applied in reasonable optimization, is realized the collection desulphurization denitration dedusting Trinity while being carried out, synchronously completing；Desulphurization denitration efficiency of dust collection has reached minimum discharge requirement.
Description
Technical field
The invention belongs to boiler flue gas desulfurization denitration dust collecting techniques, and in particular to a kind of low temperature liquid phase cyclone desulfuration denitration removes
Dirt integral process.
Background technique
The method that the mainly use of the desulphurization denitration dust collecting process of current boiler smoke is implemented step by step, including denitration,
Three step of desulfurization and dedusting.
Currently, the selective noncatalytic reduction of common denitration technology (SNCR, Selective Non-Catalytic
Reduction), selective catalytic reduction (SCR, selective catalytic reduction), low nitrogen burning, Ozone,
Low temperature liquid phase chelating method etc..
It is 850 that SNCR, which is reducing agent (such as ammonia, ammonium hydroxide or urea) the penetrating fire box temperature containing NHx base,
DEG C~1100 DEG C of region, with NOxReduction reaction occurs and generates N2And water.SNCR denitration technology does not use catalyst, operation
It is at low cost；But denitration efficiency is low, and about 40% ~ 70%, it is mostly used to make primary denitration, can be used as low NOxBurning, SCR denitration technology
Supplement process means, be not able to satisfy minimum discharge requirement；Denitration temperature requirement is high, and 850 DEG C ~ 1100 DEG C；There is also the escaping of ammonia
Phenomenon easily causes secondary pollution, and there are explosive dangers.
SCR refers to that under the action of catalyst it is raw that redox reaction selectively occurs with the nitrogen oxides in flue gas
At nitrogen and water, reaction temperature can be down to 300 DEG C ~ 400 DEG C, and reaction principle is essentially the same with SNCR, need the outer Benitration reactor of furnace,
Denitration efficiency is up to 90% or more.Compared with SNCR, reaction temperature is reduced to 300 DEG C ~ 400 DEG C；Denitration efficiency is higher, up to 90% with
On；But as SNCR technical matters, it is still necessary to which ammonia storage system, spray system etc., there are the escaping of ammonia phenomenons；Simultaneously as making
With catalyst, there is the problems such as inactivation, blocking in catalyst, be not suitable for the industrial and mining condition that exhaust gas viscosity is big, dust content is high；Fortune
Seek it is at high cost, practice have shown that, needed replacing in catalyst every half a year to 2 years, exist simultaneously dangerous waste emission problem；Exhaust gas is logical
It is big to cross Benitration reactor resistance, energy consumption is high.
Low nitrogen burning method mainly by burning boiler use low NO, control to oxygen amount, ignition temperature and
Burning time is to reduce the discharge amount of nitrogen oxides, but boiler thermal efficiency decreases.
Ozonation is first to generate ozone by ozone generator, aoxidizes NO and NO using the oxidisability of ozone2, with reality
The purpose of existing denitration, it is big that there are power consumption, the low problem of denitration efficiency.
Above-mentioned existing conventional denitrating technique, is gas phase reaction, due to the substantive characteristics of gas phase reaction, determines reaction
Low efficiency, speed are slow, and denitrification process reaction temperature is high, need using catalyst, this has just placed restrictions on conventional denitrating technique and has been applicable in model
It encloses, the denitrating flue gas of content dusty, high amount of nitrogen oxides, sticky dust is made to become problem.
Currently, common desulfurization technology has dry method, semidry method, Dual alkali, ammonia process, magnesium processes etc., and sulfur removal technology is with Dual alkali
Most mature, desulfuration efficiency is high.Dry method, semidry method are completed in fluidized bed furnace and/or fluidized bed using lime stone as desulfurizing agent, high
Wet phase reaction, low efficiency.Dual alkali, ammonia process, magnesium processes are completed in absorption tower, and liquid phase reactor is belonged to, and use caustic soda and stone respectively
Buck, ammonium hydroxide and magnesia are as absorbent.Wherein there is the escaping of ammonia in ammonia process.
Existing conventional desulfurization technique, predominantly lime slurry or lye sulfur dioxide absorption, reoxidize as sulfate radical
Process, since lime slurry solubility is low or sulfur dioxide is absorbed by spray liquid that it is still necessary to secondary oxidations can just be converted into sulfuric acid
Radical ion also affects the quick absorption of sulfur dioxide.
Currently, dust collecting process need to be classified processing according to Dust Capacity and particulate matter size, and substep is completed, and predominantly multitube removes
Dirt, electrostatic precipitation, bag-type dust, electric bag composite dedusting and wet static dedusting.Process flow is long, and equipment investment is big.
There are some problems in above-mentioned existing conventional desulfurization denitration dust collecting, specifically include that
One, desulphurization denitration dedusting is implemented step by step, and complex process, process flow is long, and cost of investment is high, takes up a large area, transports
Working cost is high, low efficiency, it is difficult to reach national minimum discharge requirement；
Two, denitration is mostly gas phase reaction, and denitration efficiency is low, there are problems that the escaping of ammonia, have it is secondary it is dirty so, it is explosive, using catalyst,
Take gas poor selectivity, catalyst easy in inactivation needs to regularly replace, and catalyst contains heavy metal, needs to recycle, there is heavy metal pollution problem.One
It is directly the difficulties of waste gas pollution control and treatment.
Three, dust collecting process long flow path needs multi-tube dusting, electric bag dust, wet static dedusting classification to administer, equipment investment
Greatly.
Summary of the invention
The present invention is proposed to overcome disadvantage existing in the prior art, and the purpose is to provide a kind of low temperature liquid phase
Cyclone desulfuration denitration dust-removing integrated technique.
The technical scheme is that
A kind of low temperature liquid phase cyclone desulfuration denitration dust-removing integrated technique, it is characterised in that: the following steps are included:
(I) configures composite absorber
It is required according to absorption tower, determines that quality is added in sodium chlorite solution, be then injected into absorbing tower bottom or separately configure liquid storage
Slot, then NaOH is added thereto, solution ph is adjusted to 8.5 ~ 13.5, adds urea granules；
(II) starting spray
Circulating pump motor is opened, spraying mechanism works normally；
The cooling of (III) boiler exhaust gas
Boiler exhaust gas is delivered to cooling device after booster fan is pressurized, after exhaust temperature is down to 80 DEG C or less, then is conveyed
Into absorb the bottom of the tower region；
Processing in (IV) tower
Tail gas enters behind absorption tower from bottom to top successively by air-flow eddy flow uniform device, spraying mechanism and the place for restraining deduster
Reason；
Tail gas is discharged through absorption tower tower top chimney after (V) processing.
The wind speed that the tail gas enters absorption tower is 3 ~ 6 meter per seconds.
Liquid-gas ratio in the absorption tower is 1 ~ 6L/NM3。
Temperature in the absorption tower is between 40 DEG C ~ 75 DEG C, and pH value is between 8.5 ~ 13.5.
The mass fraction of the sodium chlorite solution is 25%.
The addition quality of the urea granules is that quality 1% ~ 3% is added in sodium chlorite solution.
The beneficial effects of the present invention are:
The present invention provides a kind of low temperature liquid phase cyclone desulfuration denitration dust-removing integrated techniques, integrate desulphurization denitration dedusting,
Reaction temperature is low, has reached energy-saving effect；It is not influenced by exhaust gas properties, exhaust gas is widely applicable, and various tail gas can be administered；By
The bottleneck of gas phase reaction is breached in denitration, is realized from gas phase to liquid reactive transformation, denitrification efficiency is high, while by
In having used liquid phase rotational flow dust-removing technology, the wet-esp in dust pelletizing system can be replaced, to realize high-efficiency desulfurization denitration
The purpose of dedusting, indices can reach minimum discharge standard；Due to the desulphurization denitration dedusting Trinity, facility compact is accounted for
Ground area is small, and investment is low with operation cost to be greatly reduced, and realizes energy-efficient purpose.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of device used by present invention process；
Fig. 2 is the main view of air-flow eddy flow uniform device in device used by present invention process；
Fig. 3 is the cross-sectional view of A-A in Fig. 2；
Fig. 4 is the structural schematic diagram of lattice canopy in device used by present invention process；
Fig. 5 is the structural schematic diagram of tube sheet in device used by present invention process；
Fig. 6 is the cross-sectional view restrained in device used by present invention process.
Wherein:
1 absorption tower, 2 air-flow eddy flow uniform device
3 spraying mechanisms 4 restrain deduster
5 back-purge system, 6 admission line
7 circulating line, 8 booster fan
9 circulating pump, 10 feed liquid system
Terminal pad in 21 outer fixed rings 22
23 blades
41 lattice canopy, 42 tube sheet
43 tube banks
411 grille strips 421 restrain annular groove
431 outer tube, 432 inner tube
433 impellers.
Specific embodiment
With reference to the accompanying drawings of the specification and embodiment is to low temperature liquid phase cyclone desulfuration denitration dust-removing integrated technique of the present invention
It is described in detail:
A kind of low temperature liquid phase cyclone desulfuration denitration dust-removing integrated technique, it is characterised in that: the following steps are included:
(I) configures composite absorber
It is required according to absorption tower, determines that quality is added in sodium chlorite solution, be then injected into absorbing tower bottom or separately configure liquid storage
Slot, then NaOH is added thereto, solution ph is adjusted to 8.5 ~ 13.5, adds urea granules；
Urea granules are added before formal production, and between period of immaturity, urea must not be added.
During production run, is monitored by pH value, sodium chlorite concentrations and urea concentration, add alkaline agent caustic soda respectively
(piece alkali), 25% sodium chlorite solution and urea granules, sodium chlorite solution pass through flowmeter be added.
(II) starting spray
Circulating pump motor is opened, spraying mechanism works normally；
The cooling of (III) boiler exhaust gas
Boiler exhaust gas is delivered to cooling device after booster fan is pressurized, after exhaust temperature is down to 80 DEG C or less, then is conveyed
Into absorb the bottom of the tower region；
Processing in (IV) tower
Tail gas enters behind absorption tower from bottom to top successively by air-flow eddy flow uniform device, spraying mechanism and the place for restraining deduster
Reason；
Into tower bottom tail gas after air-flow eddy flow uniform device, change flow regime, formed eddy flow, come into full contact with spray liquid,
Reaction absorbs, and completes desulphurization denitration task.Tail gas in eddy flow state continues uplink, and after restraining deduster, realization is removed
Dirt.
Tail gas is discharged through absorption tower tower top chimney after (V) processing.
The wind speed that the tail gas enters absorption tower is 3 ~ 6 meter per seconds.
Liquid-gas ratio in the absorption tower is 1 ~ 6L/NM3。
Temperature in the absorption tower is between 40 DEG C ~ 75 DEG C, and pH value is between 8.5 ~ 13.5.
The mass fraction of the sodium chlorite solution is 25%.
The addition quality of the urea granules is that quality 1% ~ 3% is added in sodium chlorite solution.
Present invention process replaces conventional gas phase reaction using desulphurization denitration liquid phase reactor, and reasonable optimization is revolved using liquid phase
Flow Technique, the technique for realizing collection desulphurization denitration dedusting (wet type electricity the removes dust removal part) Trinity while carrying out, synchronously completing
Process.Desulphurization denitration efficiency of dust collection has reached minimum discharge requirement.Entire technique is completed in absorption tower.
In desulphurization denitration dedusting integration process R&D process, the concept of colloid chemistry " aerosol " is introduced, it is objective
Main ingredient, existing condition existing for flue gas aerosol are analyzed, it is scientific and reasonable that the side for destroying aerosol existence condition has been determined
Liquid phase cyclone technique is selected in method, while namely dedusting best bet, optimization, makes the flue gas and spray liquid entered in integrated tower
In the turbulence state as " hurricane, whirlwind ", on the one hand, flue gas aerosol flash disruption, dust particles quickly agglomerate, are heavy
Drop, and tower bottom is flowed into spray liquid, to realize the purpose of refined dedusting；On the other hand, the flue gas in turbulence state and spray
Leaching liquid is adequately contacted, is collided, and mass-transfer efficiency greatly improves, to substantially increase reaction speed, accelerates nitric oxide and two
The oxidation and absorption process of sulfur oxide, improve reaction efficiency.
The principle of the present invention is:
Existing conventional denitrating technique, is gas phase reaction, due to the substantive characteristics of gas phase reaction, determine reaction efficiency it is low,
Speed is slow, and denitrification process reaction temperature is high, needs using catalyst, this has just placed restrictions on the conventional denitrating technique scope of application, makes height
Dust content, high amount of nitrogen oxides, sticky dust denitrating flue gas become problem；Existing conventional desulfurization technique, predominantly
Lime slurry or lye sulfur dioxide absorption, reoxidize the process for sulfate radical, since lime slurry solubility is low or titanium dioxide
Sulphur is absorbed into that it is still necessary to secondary oxidations can just be converted into sulfate ion by spray liquid, also affects the quick absorption of sulfur dioxide.
Based on the requirement of absorption tower gas phase control theory, reactant must quickly be dissolved in the water, and just be able to achieve efficient liquid phase
Desulphurization denitration, the present invention is based on this, and process flow adaptable therewith, process conditions has been determined, allows desulphurization denitration in liquid phase
Under the conditions of carry out simultaneously, achieved the purpose that high-efficiency desulfurization a word used in place name nitre, minimum discharge can be achieved in desulphurization denitration dedusting.
Chemical reaction are as follows:
The main matter that chemical reaction is participated in desulphurization denitration dedusting integrated tower is NO, NO2、SO2、NaOH、NaClO2Deng mainly
Chemical reaction has:
Denitration (nitrogen oxides) process:
In NaClO2In alkaline solution, NO is first converted into NO2, it is dissolved in water and generates sodium nitrite, another step is oxidized to nitre
Sour sodium.
The overall reaction equation of this process are as follows:
4NO+3ClO2-+4OH-→4NO3-+3Cl-+2H2O；
Desulfurization (sulfur dioxide) reaction process:
The net reaction of this process are as follows: NaClO2+2SO2+4NaOH=2Na2SO4+NaCl+4H2O
The reaction of urea process is added are as follows:
2NaOH + CO(NH2)2 = 2NH3 + Na2CO3
6NO2+8NH3=7N2+12H2O
Urea is the equal of dewatered ammonium carbonate, so hydrolysis has occurred under alkaline condition；
The reaction is the attached assistant section prevented in tail gas containing nitrogen dioxide, to prevent the escaping of ammonia, has to control amount of urea
In process conditions.
Oxygen increased reaction process:
NO2+O2→NO3-
SO2+O2→SO4 2-
The above reaction carries out under alkaline condition, oxygenation the purpose is to reduce the dosage of sodium chlorite, make nitrogen dioxide and dioxy
Change sulphur and is converted into nitrate and sulfate.
The characteristics of present invention process, is that the NO for hardly possible being dissolved in water is converted into easily using high efficiency composition agent of the invention
It is dissolved in the NO of water2, then by the absorption of NaOH solution big flow circulated sprinkling, the purpose of NO_x Reduction by Effective is realized, in the same of denitration
When, by SO2It is oxidized to SO4 2-, realize that desulphurization denitration is synchronous and carry out.
In nitrogen oxides in flue gas, predominantly nitric oxide accounts for 95% or more, and nitric oxide is difficult to be dissolved in water
In, SNCR or SCR belong to gas phase reaction, low efficiency.Conversion of nitric oxide gas is nitrogen dioxide soluble easily in water, and it is anti-to realize liquid phase
It answers, efficiency greatly improves.
Oxygenation oxidation process further increases the oxidability of reaction liquid phase, increases liquid phase oxygen content, will be empty with air compressor machine
It is water-soluble that air is uniformly sprayed into absorption tower by horizontal upper (many places are with holes on transverse tube) that gas passes through in pipeline indentation tower bottom solution
In liquid, in the presence of oxygen, sodium sulfite is allowed to be fully converted into sodium sulphate, while saving complexing agent dosage.
Liquid phase rotational flow dust-removing process: by liquid phase rotational flow dust-removing technology, the highly conductive of absorption tower internal electrolyte solution is utilized
Property, that destroys dust particles rapidly is physically present state, makes dust particles rapid aggregation, and sink to causing absorption tower bottom with spray liquid
Portion.
Device of the present invention includes absorption tower 1, sets gradually air-flow eddy flow from bottom to top inside the absorption tower 1
Uniform device 2, spraying mechanism 3, tube bank deduster 4 and back-purge system 5,1 lower end of absorption tower are provided with admission line 6 and follow
Booster fan 8 is arranged on admission line 6 for endless tube road 7, and circulating line 7 passes through the circulating pump 9 being arranged thereon and spraying mechanism 3 connects
It is logical；Spraying mechanism 3 is connected to feed liquid system 10.
Chimney is arranged in 1 tower top of absorption tower.
The junction on the admission line 6 and absorption tower 1 is located at 2 lower section of air-flow eddy flow uniform device.
The circulating line 7 is disposed proximate to the position of 1 tower bottom of absorption tower with the junction on absorption tower 1.
The air-flow eddy flow uniform device 2 includes the inside and outside outer fixed ring 21 and interior terminal pad 22 being arranged, and is distributed in outer
Multiple blades 23 between fixed ring 21 and interior connection ring 22；Outer fixed ring 21 is circular ring type, and interior terminal pad 22 is collar plate shape, leaf
Piece 23 is long strip type, and the side from connecting with outer fixed ring 21 is gradually reduced to the side width connecting with interior terminal pad 22.
The angle of the 23 place plane of blade and horizontal plane is 43 ° ~ 46 °.
The spraying mechanism 3 includes Multi-layer sprinkling layer, and multiple spray heads are arranged in every layer of spraying layer.
The tube bank deduster 4 includes upper and lower two groups of crossbeam groups, lattice canopy 41, tube sheet 42 and multiple tube banks 43, each crossbeam
Every crossbeam both ends of group are fixed with 1 inner wall of absorption tower, are respectively provided with lattice canopy 41 above every group of crossbeam group, are arranged above lattice canopy 41
Tube sheet 42, forms multiple tube bank annular grooves 421 on tube sheet 42, and the both ends of each tube bank 43 are individually fixed in the tube bank of lower perforated plate 42
Annular groove 421.
The lattice canopy 41 is the grid type structure being made of more 411 transverse and longitudinal interconnections of grille strip.
The tube bank 43 include the outer tube 431 fixed with tube bank annular groove 421, the inner tube 432 being set to inside outer tube 431 and
Multiple impellers 433, are arranged multiple apertures on 432 tube wall of inner tube, and the impeller 433 includes the inside and outside outer ring being arranged and inner ring, with
And multiple impeller blades between inner and outer ring are set to, impeller blade is identical as 23 shape of blade, and plane where it and horizontal plane press from both sides
Angle is 43 ° ~ 46 °.
2 ~ 3 impellers 433 are installed in every root canal beam 43.
The inner ring sleeve is set to 432 outside of inner tube and is fixedly connected, and outer ring is fixedly connected with 431 inner wall of outer tube.The leaf
Wheel 433 is uniformly arranged from top to bottom, and is restrained and be respectively provided with impeller 433 at the port of both ends.Impeller 433 and inner tube 432, outer tube 431
Connection type be plastics welding.
The back-purge system 5 includes the general pipeline being connected to clear water water source and is in charge of a be connected to general pipeline, Mei Gefen
Spray head is arranged in bottom of the tube, and spray head is set to 432 top of inner tube of tube bank 43.The general pipeline of back-purge system 5 is in charge of company with several
It connects, to each tube bank water delivery.
The absorption tower 1 inner wall during manufacturing is equipped with fixture nut.
The grille strip is PVC material.
Multiple apertures are set, and inner tube is connected to back-purge system 5, back-flushing sprinkle is in impeller 433 on 432 tube wall of inner tube
On, by 433 guide tube bundle inner wall of impeller, inner wall dust is swept away.The bath of backwashing water interval is rinsed primary for 10 ~ 20 minutes
.
Experiment effect demonstration:
Sheng Da Paper Co., Ltd, Tangshan City replaces traditional desulphurization denitration dust collecting process using present invention process, implements biomass
Boiler exhaust gas is administered, and minimum discharge requirement has been reached.
Tail gas Raw performance: tail gas amount 70,000 ~ 150,000 M3/ hour, 700 ~ 900mg/M of nitrogen oxides initial content3, titanium dioxide
Sulphur 200mg/M3, dust 200mg/M3, through using after present invention process technology governance, indices reach or better than country or
Local minimum discharge index, nitrogen oxides Han Liang≤50mg/M3, Er Yangization Liu≤30mg/M3, Fen Chen≤10mg/M3。
Using present invention process, boiler exhaust gas can be made by 50mgNm3It is down to 10mg/Nm3 。
Claims (6)
1. a kind of low temperature liquid phase cyclone desulfuration denitration dust-removing integrated technique, it is characterised in that: the following steps are included:
(I) configures composite absorber
It is required according to absorption tower, determines that quality is added in sodium chlorite solution, be then injected into absorbing tower bottom or separately configure liquid storage
Slot, then NaOH is added thereto, solution ph is adjusted to 8.5 ~ 13.5, adds urea granules；
(II) starting spray
Circulating pump motor is opened, spraying mechanism works normally；
The cooling of (III) boiler exhaust gas
Boiler exhaust gas is delivered to cooling device after booster fan is pressurized, after exhaust temperature is down to 80 DEG C or less, then is conveyed
Into absorb the bottom of the tower region；
Processing in (IV) tower
Tail gas enters behind absorption tower from bottom to top successively by air-flow eddy flow uniform device, spraying mechanism and the place for restraining deduster
Reason；
Tail gas is discharged through absorption tower tower top chimney after (V) processing.
2. low temperature liquid phase cyclone desulfuration denitration dust-removing integrated technique according to claim 1, it is characterised in that: the tail
The wind speed that gas enters absorption tower is 3 ~ 6 meter per seconds.
3. low temperature liquid phase cyclone desulfuration denitration dust-removing integrated technique according to claim 1, it is characterised in that: the suction
Receiving the liquid-gas ratio in tower is 1 ~ 6L/NM3。
4. low temperature liquid phase cyclone desulfuration denitration dust-removing integrated technique according to claim 1, it is characterised in that: the suction
Receiving the temperature in tower is between 40 DEG C ~ 75 DEG C, and pH value is between 8.5 ~ 13.5.
5. low temperature liquid phase cyclone desulfuration denitration dust-removing integrated technique according to claim 1, it is characterised in that: the Asia
The mass fraction of sodium chlorate solution is 25%.
6. low temperature liquid phase cyclone desulfuration denitration dust-removing integrated technique according to claim 1, it is characterised in that: the urine
The addition quality of crude granule is that quality 1% ~ 3% is added in sodium chlorite solution.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114456852A (en) * | 2021-12-23 | 2022-05-10 | 中煤地第二勘探局集团有限责任公司 | Waste liquid treatment method for blast furnace gas carbon capture |
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| CN105013315A (en) * | 2015-07-02 | 2015-11-04 | 南京东大能源工程设计院有限公司 | Wet method flue gas desulphurization denitration dedusting integration system |
| CN205055806U (en) * | 2015-09-30 | 2016-03-02 | 南京东大能源工程设计院有限公司 | Wet flue gas desulfurization denitration dust removal integration system |
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| CN207270976U (en) * | 2017-09-15 | 2018-04-27 | 锦州市太和区子洋环保设备厂 | A kind of novel dust removing denitration desulfurizing tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114456852A (en) * | 2021-12-23 | 2022-05-10 | 中煤地第二勘探局集团有限责任公司 | Waste liquid treatment method for blast furnace gas carbon capture |
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Inventor after: Xue Junzeng Inventor after: Li Cuifang Inventor before: Xue Junzeng Inventor before: Li Cuifang Inventor before: Cao Jingxiao |
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Application publication date: 20191119 |