CN106268284B - A method of utilizing sulfur dioxide in self-produced waste residue removing dilval smelting exhaust gas - Google Patents
A method of utilizing sulfur dioxide in self-produced waste residue removing dilval smelting exhaust gas Download PDFInfo
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- CN106268284B CN106268284B CN201610827986.9A CN201610827986A CN106268284B CN 106268284 B CN106268284 B CN 106268284B CN 201610827986 A CN201610827986 A CN 201610827986A CN 106268284 B CN106268284 B CN 106268284B
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- exhaust gas
- waste residue
- desulfurization
- dilval
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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
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a kind of methods using sulfur dioxide in self-produced waste residue removing dilval smelting exhaust gas, belong to dilval waste residue field of comprehensive utilization.The present invention absorbs the sour gas such as the sulfur dioxide in flue gas during smelting and reacted rear honeycombed grain material is delivered to regeneration rotary kiln progress pyrolytic regeneration simultaneously using honeycombed grain material made of dilval melting waste slag；Granular materials after regeneration returns to desulfurization rotary kiln and uses, and regenerates the concentrated acidic gas of generation after dedusting, produces by-product diluted acid using water absorption, tail gas is passed through desulfurization kiln and discharges after deep desulfuration together with smelting exhaust gas.The present invention makes full use of MgO present in melting waste slag to carry out the reaction of flue gas during smelting dry desulfurization, it realizes and is recycled in the factory of waste residue, improve the level of resources utilization, while significantly reducing the added amount of chemical of flue gas desulfurization course, enterprise operation cost is reduced, secondary pollution is reduced.
Description
Technical field
This method is related to the comprehensive utilization of dilval waste residue, in particular to a kind of to remove dilval smelting using self-produced waste residue
The method for refining SO 2 in waste gas.
Background technique
In recent years, as stainless steel industry is grown rapidly, the demand and production scale of dilval are continuously increased, simultaneously
As the resource of nickel sulfide ore is petered out, the use of lateritic nickel ore becomes trend.Since laterite nickel content is low, smelt
The waste residue amount discharged in the process is quite huge, becomes pendulum in a great problem of dilval enterprise and local area, gives ferronickel smelting
The sustainable development of refining brings severe challenge.
The main component of laterite dilval melting waste slag is SiO2(about 52%), MgO (about 32%), FeO are (about
7.3%) it is few that valuable metal, can be recycled, while having magnesium high calcium low, poor activity；Compression strength is big, and levigate energy consumption is high and cost
The features such as high.Current Solid state fermentation mode mainly based on storing up, fill, does not only take up a large amount of land resource, also serious
Pollute environment.Manufacture building materials raw material, mineral wool, microlite are the main aspects of current ferronickel waste residue comprehensive utilizating research, but on
It states the physical property that waste residue is all only utilized, and the compounds such as MgO in slag is not implemented and are made full use of, utilization efficiency is not high.
RKEF (rotary kiln-mineral hot furnace-converter) technology is the dilval smelting process that the current country is widely used, and is smelted
Technology waste gas mainly includes ore-smelting electric furnace exhaust gas, rotary kiln exhaust gas, and pollutant is mainly SO2, NOx, flue dust, Ni and its chemical combination
Object, Cr and its compound etc..The flue-gas temperature of rotary kiln discharge is 300 DEG C, general to be cooled to through mixed wind containing volume of smoke
150 DEG C or so, by being discharged after dedusting, desulfurization.About 950 DEG C of flue-gas temperature of ore-smelting electric furnace discharge, are recycled by waste heat boiler
It is discharged after waste heat and dedusting, desulfurization.
It is domestic at present that there are commonly non-ferrous metal flue gas during smelting desulfurization technologies can be divided into wet process and two kinds of dry method.Using more wide
General Wet Flue Gas Desulfurization Technology has limestone-gypsum method, spent lye absorption process, sodium alkali etc..Limestone-gypsum method is with lime
SO in stone or lime slurry and flue gas2It chemically reacts, generates gypsum.Sodium alkali mainly utilizes in lye and flue gas
SO2Reaction.Wet process of FGD reaction process is fast, good absorption effect, but requires additionally to add absorbent, to increase enterprise
Operating cost, and react waste and easily cause secondary pollution.The main active burnt desulfurization of dry desulfurization, the injection of charged dry powder are de-
Waste water, waste residue secondary pollution problem is not present in sulphur, electrochemical process desulfurization etc., but due to technology and desulfurization effect, not yet
It is widely applied.
Patent: mentioning a kind of magnesium oxide method flue gas desulfurization technique of cyclic oxidation integral structure in CN201210415270,
This method eliminate conventional oxidation magnesium wash and starch-method of reproduction desulfurization in magnesia step for regeneration, increase clear liquid return, filtrate recycling
Process improves resource utilization, and overcomes the disadvantage that magnesia regeneration rate is low in conventional oxidation magnesium wet desulphurization.Above-mentioned patent
And similar patent needs to add magnesia pulvis all based on wet magnesium oxide desulphurization, finally can all generate a large amount of aqueous sulphur
Sour magnesium, regeneration energy consumption is big, and operating cost is high.
This method can be saved significantly by carrying out the reaction of flue gas during smelting dry desulfurization using MgO already existing in waste residue
The medicament and water dosage of flue gas desulfurization course are saved, the energy consumption of magnesia regenerative process is reduced, and realizes and is followed in the factory of waste residue
Ring utilizes, and improves the level of resources utilization.
Summary of the invention:
1. technical problems to be solved by the inivention
The problem that for comprehensively utilizing in the prior art for dilval waste residue, this method provides a kind of utilization
The method of sulfur dioxide in self-produced waste residue removing dilval smelting exhaust gas, by being comprehensively utilized to dilval waste residue, simultaneously
Handle flue gas during smelting SO2With the technique for recycling melting waste slag, the discharge of medicament added with waste water, waste residue is reduced.
2. technical solution
A method of using sulfur dioxide in self-produced waste residue removing dilval smelting exhaust gas, step includes:
(1) honeycombed grain material that dilval is smelted to self-produced waste residue is packed at the top of desulfurization rotary kiln, smelting exhaust gas
Enter desulfurization rotary kiln from bottom, carries out countercurrent reaction；
(2) discharge at the top of desulfurization rotary kiln by the exhaust gas of step (1), into electrical dust collector device, is discharged into chimney after dedusting；
(3) honeycombed grain material after step (1) use is discharged from the kiln bottom of desulfurization rotary kiln, sub-fraction is sent to heap
Other utilizations are arranged or do outside the venue, remaining major part is delivered to regeneration rotary kiln；
(4) honeycombed grain material after step (1) use is subjected to 1000-1200 DEG C of high temperature point in regeneration rotary kiln
Solution, key reaction have:
MgSO3→MgO+SO2
(5) the concentrated acidic gas for generating step (4) enters absorption tower after dedusting, absorbs to obtain pair using water spray
Produce diluted acid；
(6) honeycombed grain material after step (4) regeneration is returned into desulfurization rotary kiln, be recycled；
(7) tail gas that step (5) generate is passed through desulfurization rotary kiln, the further deep desulfuration together with smelting exhaust gas.
3. the utility model has the advantages that
The beneficial effects of the present invention are:
(1) present invention carries out flue gas desulfurization using porous material made from nickel-iron smelting waste residue, is the comprehensive utilization of waste residue
New thinking and direction are provided, the level of resources utilization is improved, reduces the pollution to environment；
(2) traditional wet magnesium oxide desulphurization is compared, desulfurization can be greatlyd save using sulfur method provided by the invention
The medicament and water dosage of process reduce the energy consumption and enterprise operation cost of magnesia regenerative process；
(3) traditional waste residue comprehensive Utilization Ways are compared, the present invention is realized in the factory of waste residue and recycled, and is significantly reduced
Environmental pollution in communications and transportation cost and transportational process；
(4) flue gas desulfurization is carried out using porous material made from nickel-iron smelting waste residue, desulfurization degree reaches 90% or more.
Detailed description of the invention:
Fig. 1 is the flow chart using the method for sulfur dioxide in self-produced waste residue removing dilval smelting exhaust gas.
Specific embodiment:
Embodiment 1:
A method of sulfur dioxide in dilval smelting exhaust gas being removed using self-produced waste residue, as shown in Figure 1: its step
Include:
(1) honeycombed grain material that dilval is smelted to self-produced waste residue is packed at the top of desulfurization rotary kiln, porous particle
Material additional amount is 60kg/h, smelting exhaust gas (72000m3/ h, SO2Concentration 290mg/m3) from bottom enter desulfurization rotary kiln, into
Row countercurrent reaction 10h；
Honeycombed grain material is the honeycombed grain material that dilval smelts self-produced waste residue comprising SiO2, MgO and FeO.
(2) exhaust gas for generating the reaction of step (1) discharge at the top of desulfurization rotary kiln, into electrical dust collector device, dedusting
After be discharged into chimney and discharged；The SO in tail gas after detecting dedusting2Concentration 20mg/m3, desulfurization degree 93.1%；
(3) honeycombed grain material after step (1) use is discharged from the kiln bottom of desulfurization rotary kiln, sub-fraction is sent to heap
Other utilizations are arranged or do outside the venue, 80% honeycombed grain material after use is sent to regeneration rotary kiln；
(4) honeycombed grain material after step (1) use is subjected in regeneration rotary kiln pyrolytic, controls temperature
1000 DEG C, key reaction has:
MgSO3→MgO+SO2
(5) sour gas that step (4) generate is entered into electrical dust collector device, absorption tower is passed through after dedusting, using water spray
Absorption obtains by-product diluted acid；
(6) honeycombed grain material after step (4) regeneration is returned into desulfurization rotary kiln, be recycled；
(7) acid tail gas that step (5) generate is passed through desulfurization rotary kiln, further depth is de- together with smelting exhaust gas
Sulphur.
Granular materials after regeneration returns to desulfurization rotary kiln and is recycled, and the concentrated acidic gas that regeneration kiln generates is through removing
Dirt, water spray absorb to obtain by-product diluted acid.
Dilval in the step (1) smelts the honeycombed grain material of self-produced waste residue, the preparation of honeycombed grain material
Method the steps include: for the nickel ore furnace slag under the condition of high temperature to be sent into modulation electric furnace, 1350 DEG C -1450 of furnace temperature of control modulation
℃；1350 DEG C -1450 DEG C of heat preservation, into Melt launder；By high-temperature fusant through making in the molding die on chute injection conveyer belt
It is shaped；Forming high temperature granulated materials are exchanged heat in Heat Room, after material solidification is cooled to low temperature, obtain granular materials
Finished product.
Preparation-obtained granular materials specific surface area 0.8m2/ kg, bulk density 500kg/m3, MgO accounts for porous particle material
Expect quality 30%, the sum of MgO, FeO, CaO content account for gross weight 45%, and SiO content accounts for honeycombed grain material quality gross weight 50%, remaining
Amount is Al2O3、Cr2O3, account for about 5%.
Dedusting in the step (2) and step (5), involved dust-extraction unit are four electric field electrical dust collector devices.
Step (2) middle outlet tail gas SO2Concentration 20mg/m3, desulfurization degree 93.1%, the flue gas after desulfurization is through electric precipitator
Enter smoke stack emission after dedusting.
Embodiment 2
For step with embodiment 1, difference is smelting exhaust gas (72000m in step (1)3/ h, SO2Concentration 350mg/m3) enter
Desulfurization rotary kiln, granular materials additional amount are 74kg/h, carry out countercurrent reaction 9h；
Step (2) middle outlet tail gas SO2Concentration 21mg/m3, desulfurization degree 94%, the flue gas after desulfurization removes through electric precipitator
Enter smoke stack emission after dirt.
1100 DEG C of temperature of control in step (4).
Embodiment 3
For step with embodiment 1, difference is smelting exhaust gas (40000m in step (1)3/ h, SO2Concentration 290mg/m3) enter
Desulfurization rotary kiln, granular materials additional amount are 35kg/h；Step (2) middle outlet tail gas SO2Concentration 11.6mg/m3, desulfurization degree is
96%, the flue gas after desulfurization enters smoke stack emission after electric precipitator dedusting.1200 DEG C of temperature of control in step (4)；Porous
The preparation method of grain material, step further include to modulation electric furnace addition MgO；Heating and thermal insulation closes added MgO and ferronickel
Golden melting waste slag is melted and is uniformly mixed, and into Melt launder, obtains high temperature molten slurry, wherein waste residue and the mass ratio of regulator are
100:20。
Embodiment 4
For step with embodiment 1, difference is smelting exhaust gas (72000m in step (1)3/ h, SO2Concentration 400mg/m3) enter
Desulfurization rotary kiln, granular materials additional amount are 90kg/h, carry out countercurrent reaction 8h；
Step (2) middle outlet tail gas SO2Concentration 22mg/m3, desulfurization degree 94.5%, the flue gas after desulfurization is through electric precipitator
Enter smoke stack emission after dedusting.
Embodiment 5
For step with embodiment 1, difference is smelting exhaust gas (72000m in step (1)3/ h, SO2Concentration 200mg/m3) enter
Desulfurization rotary kiln, granular materials additional amount are 45kg/h；
Step (2) middle outlet tail gas SO2Concentration 16mg/m3, desulfurization degree 92%, the flue gas after desulfurization removes through electric precipitator
Enter smoke stack emission after dirt.
Claims (7)
1. a kind of method using sulfur dioxide in self-produced waste residue removing dilval smelting exhaust gas, step include:
(1) honeycombed grain material that dilval is smelted to self-produced waste residue is packed at the top of desulfurization rotary kiln, is turned round into desulfurization
Kiln, smelting exhaust gas enter desulfurization rotary kiln from bottom, carry out countercurrent reaction；
(2) exhaust gas generated discharge at the top of desulfurization rotary kiln will be reacted through step (1), be discharged into chimney after dedusting and be arranged
It puts；
(3) honeycombed grain material after step (1) use is discharged from the kiln bottom of desulfurization rotary kiln, is sent to regeneration rotary kiln；
(4) honeycombed grain material is carried out decomposing under the conditions of 1000-1200 DEG C of temperature in regeneration rotary kiln；
(5) sour gas that step (4) generate is passed through after dedusting absorption tower, absorbs to obtain by-product diluted acid using water spray；
(6) honeycombed grain material after step (4) regeneration is returned into desulfurization rotary kiln, be recycled；
(7) acid tail gas that step (5) generate is passed through desulfurization rotary kiln, the further deep desulfuration together with smelting exhaust gas；Institute
State the honeycombed grain material that the dilval in step (1) smelts self-produced waste residue, the preparation method of honeycombed grain material, step
Are as follows: the nickel ore furnace slag under the condition of high temperature is sent into modulation electric furnace, 1350 DEG C -1450 DEG C of furnace temperature of control modulation；Heat preservation 1350
DEG C -1450 DEG C, into Melt launder；By high-temperature fusant through making its forming in the molding die on chute injection conveyer belt；It will be at
Shape high temperature granulated materials exchange heat in Heat Room, after material solidification is cooled to low temperature, obtain granular materials finished product.
2. the method according to claim 1 using sulfur dioxide in self-produced waste residue removing dilval smelting exhaust gas,
It is characterized in that, honeycombed grain material additional amount is 35-90kg/h in the step (1).
3. the method according to claim 1 using sulfur dioxide in self-produced waste residue removing dilval smelting exhaust gas,
It is characterized in that, the honeycombed grain material specific surface area 0.8m2/ kg, bulk density 500kg/m3, including SiO2, MgO and FeO group
Point.
4. the method according to claim 1 using sulfur dioxide in self-produced waste residue removing dilval smelting exhaust gas,
It is characterized in that, the countercurrent reaction time is 8-10h in the step (1).
5. the method according to claim 1 using sulfur dioxide in self-produced waste residue removing dilval smelting exhaust gas,
It is characterized in that, 1000-1200 DEG C of regeneration rotary kiln temperature is controlled in the step (4).
6. the method according to claim 1 using sulfur dioxide in self-produced waste residue removing dilval smelting exhaust gas,
It is characterized in that, dust-extraction unit involved by dedusting is four electric field electrical dust collector devices in the step (2) and step (5).
7. the method according to claim 1 using sulfur dioxide in self-produced waste residue removing dilval smelting exhaust gas,
It is characterized in that, smelting exhaust gas intake is 72000 m in the step (1)3/ h, SO in smelting exhaust gas2Concentration is 290 mg/m3。
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237471A (en) * | 1998-06-02 | 1999-12-08 | 中国科学院山西煤炭化学研究所 | Application of chrome-contained waste catalyst as desulfurizing agent |
| CN101301560A (en) * | 2007-05-09 | 2008-11-12 | 成都华西化工研究所 | Comprehensive utilization method of sintered pollutant |
| WO2009097027A1 (en) * | 2008-01-31 | 2009-08-06 | Conocophillips Company | Contaminant removal from a gas stream |
| CN101703886A (en) * | 2009-10-29 | 2010-05-12 | 太原理工大学 | Desulfuration method by directly utilizing magnesium slags in circulating fluidized bed boiler |
| CN104826481A (en) * | 2015-05-13 | 2015-08-12 | 中国科学院过程工程研究所 | Combined desulfurization and denitrification method implemented by using metallurgical slags |
| CN204952658U (en) * | 2015-07-24 | 2016-01-13 | 中冶华天工程技术有限公司 | Sintering pelletizing flue gas resource system |
| CN105498517A (en) * | 2015-11-30 | 2016-04-20 | 攀钢集团攀枝花钢钒有限公司 | Application of furnace slag as desulfurization absorber and desulfurization method |
| CN105771632A (en) * | 2016-03-23 | 2016-07-20 | 昆明理工大学 | Method of utilizing copper smelting slag to remove SO2, NOx and Hg in nonferrous smelting flue gas |
-
2016
- 2016-09-18 CN CN201610827986.9A patent/CN106268284B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237471A (en) * | 1998-06-02 | 1999-12-08 | 中国科学院山西煤炭化学研究所 | Application of chrome-contained waste catalyst as desulfurizing agent |
| CN101301560A (en) * | 2007-05-09 | 2008-11-12 | 成都华西化工研究所 | Comprehensive utilization method of sintered pollutant |
| WO2009097027A1 (en) * | 2008-01-31 | 2009-08-06 | Conocophillips Company | Contaminant removal from a gas stream |
| CN101703886A (en) * | 2009-10-29 | 2010-05-12 | 太原理工大学 | Desulfuration method by directly utilizing magnesium slags in circulating fluidized bed boiler |
| CN104826481A (en) * | 2015-05-13 | 2015-08-12 | 中国科学院过程工程研究所 | Combined desulfurization and denitrification method implemented by using metallurgical slags |
| CN204952658U (en) * | 2015-07-24 | 2016-01-13 | 中冶华天工程技术有限公司 | Sintering pelletizing flue gas resource system |
| CN105498517A (en) * | 2015-11-30 | 2016-04-20 | 攀钢集团攀枝花钢钒有限公司 | Application of furnace slag as desulfurization absorber and desulfurization method |
| CN105771632A (en) * | 2016-03-23 | 2016-07-20 | 昆明理工大学 | Method of utilizing copper smelting slag to remove SO2, NOx and Hg in nonferrous smelting flue gas |
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