CN107158942A - A kind of sintering furnace flue-gas dust-removing and desulfurization system - Google Patents
A kind of sintering furnace flue-gas dust-removing and desulfurization system Download PDFInfo
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- CN107158942A CN107158942A CN201710526606.2A CN201710526606A CN107158942A CN 107158942 A CN107158942 A CN 107158942A CN 201710526606 A CN201710526606 A CN 201710526606A CN 107158942 A CN107158942 A CN 107158942A
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- flue gas
- sintering furnace
- removal
- filter
- dust
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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
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
- B01D53/8609—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention discloses a kind of sintering furnace flue gas ash removal desufurization system, including the sintering furnace being sequentially connected, dust-removal and desulfurizing filter, heat-exchanging water tank, air-introduced machine and chimney, multiple filter beds are provided with the dust-removal and desulfurizing filter, the filter bed is disposed with adsorbent layer, coarse-particle bed, fine particle layer and catalyst layer by direction from top to bottom by flue gas, and the adsorbent of the adsorption layer is made of following preparation methods：Flyash, calcium oxide, calcium sulfate, sodium hydroxide and di-iron trioxide is taken to be added to the water, heating water bath carries out hydration reaction to 80~90 DEG C, hydration time 10~14 hours, then suction filtration, solid is put into heat drying 2 hours in 180 DEG C of drying boxes, produced after grinding.Flue gas ash removal desufurization system of the present invention is efficient, environmental protection, meets demand of the steel industry for desulfurization technology.
Description
Technical field
The present invention relates to flue gas desulfurization environmental protection technical field, more particularly to a kind of sintering furnace flue-gas dust-removing and desulfurization system
System.
Background technology
The purpose of raw material sintering is the agglomerate for the aggregation of granular material being changed into crystal grain, and rich ore powder and essence can be achieved
Maximally utilizing for miberal powder, improves the combustibility and metallurgical performance of raw material, while the harmful substance in raw material can also be removed,
The different additive of addition can control the content of sulphur, phosphorus etc. after raw material sintering.Sintering circuit be in whole Steel Production Flow Chart extremely
Important production process is closed, the thing for making it that complexity occur under high-temp combustion state after ferric charge, fuel and solvent etc. are mixed
Physicochemical process, compound softening is fused into after liquid, and bulk is condensed into because temperature drastically reduces to cool down, you can form sintering
Ore deposit, sulfide can be with gaseous oxygen compound (such as SO of sulphur in this course of reaction raw material2、SO3) form presence, while can also produce
The multiple harmful substances such as nitrogen oxides, hydrofluoric acid, oxycarbide, bioxin (PCDD) and furans (PCDF), when sintering flue gas warp
Environmental pollution can be caused by directly being discharged by high-altitude chimney after deduster dedusting.Due to raw materials for sintering and the difference of proportioning, cigarette is caused
Gas composition is more complicated, and the SO of 0.1~0.5% (mass fraction) is typically contained in steel industry sintering flue gas2, change in concentration compared with
Greatly, amount of flue gas emission is big and instability of flow, and flue-gas temperature is higher, the parameter such as moisture and oxygen content fluctuated with working conditions change compared with
Greatly, more coarse granule is contained in flue dust and there is poisonous harmful pollution composition, the uniqueness of sintering flue gas limits traditional maturation
Flue gas desulfurization technique be difficult to directly apply to steel industry, and the stable ripe flue gas desulfurization for being applied to power industry
Technology is difficult to indiscriminately imitate hard accordingly, it would be desirable to develop a kind of new, efficient, environmentally friendly sintering flue gas desulfurization technology to meet steel
Demand of the iron industry for desulfurization technology.
The content of the invention
The invention provides a kind of sintering furnace flue-gas dust-removing and desulfurization system, existing dry desulfurization cost height, efficiency are solved
Low the problem of.
In order to solve the above technical problems, the technical proposal of the invention is realized in this way：
A kind of sintering furnace flue gas ash removal desufurization system, including sintering furnace, dust-removal and desulfurizing filter, the heat-exchanging water being sequentially connected
Multiple filter beds are provided with case, air-introduced machine and chimney, the dust-removal and desulfurizing filter, the filter bed passes through direction by flue gas
Adsorbent layer, coarse-particle bed, fine particle layer and catalyst layer are disposed with from top to bottom, and the adsorbent of the adsorption layer is used
Following preparation methods are made：It is 20 to take weight ratio：15~25：10~15：0.5~1.5：1~3 flyash, calcium oxide, sulfuric acid
Calcium, sodium hydroxide and di-iron trioxide are added to the water, and heating water bath is to 80~90 DEG C, progress hydration reaction, and hydration time 10~
14 hours, then suction filtration, solid was put into heat drying 2 hours in 180 DEG C of drying boxes, produced after grinding.
Wherein it is preferred to, the coarse-particle bed is the expanded perlite that particle diameter is 2~5mm.
Wherein it is preferred to, the fine particle layer is the fine sand that particle diameter is 0.5~1mm.
Wherein it is preferred to, the quantity of the filter bed is 8, secondary from top to bottom to be arranged on the dust-removal and desulfurizing filter
It is interior.
Wherein it is preferred to, the filter bed bottom is provided with air exhaust branch pipe, and the air exhaust branch pipe is connected with air draft house steward,
The air draft house steward is connected with the heat-exchanging water tank.
Wherein it is preferred to, in addition to filter bed blowback system.
Wherein it is preferred to, the filter bed blowback system includes anti-blowpipe, and described anti-blowpipe one end connects with the chimney
Connect, the other end of the anti-blowpipe is connected with the air exhaust branch pipe.
Wherein it is preferred to, back blowing machine, the connection of the anti-blowpipe and the air exhaust branch pipe are provided with the anti-blowpipe
Place is provided with dynamoelectric switching valve.
Beneficial effect of the present invention：
Double-layer filter material bed dust containing capacity is big in the present invention, high temperature resistant, and fine gas-solid contact is provided for powder white lime desulfurization
With reaction condition, after the flue gas of sintering furnace is by present system, dust removal efficiency is up to 98.8%, sulfureous in flue gas oxide, nitrogen
The removal efficiency of oxide is up to 90% and 60% respectively, and non-secondary pollution thing is discharged, adaptable to flue gas.
The flue gas ash removal desufurization system of the present invention improves the desulfuration efficiency of dry desulfurizing process, when shortening desulphurization reaction
Between, desulfuration efficiency improves more than 20%-25%, and reduces the consumption of lime stone, reduces level of residue, reduces operating cost
With.
Flue gas ash removal desufurization system of the present invention is efficient, environmental protection, meets demand of the steel industry for desulfurization technology.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is sintering furnace flue-gas dust-removing and desulfurization system process figure in the present invention；
Fig. 2 is the structural representation of filter bed in the present invention.
In figure, 1. sintering furnaces, 2. dust-removal and desulfurizing filters, 3. heat-exchanging water tanks, 4. air-introduced machines, 5. chimneys, 6. filter beds, 6-
1. adsorbent layer, 6-2. coarse-particle beds, 6-3. fine particle layers, 6-4. catalyst layers, 7. air exhaust branch pipes, 8. air draft house stewards, 9. is anti-
Blowpipe, 10. back blowing machines, 11. dynamoelectric switching valves
Embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment
Only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under the premise of creative work is not made, belongs to the model that the present invention is protected
Enclose.
As depicted in figs. 1 and 2, a kind of sintering furnace flue gas ash removal desufurization system of the present embodiment offer, including be sequentially connected
It is provided with sintering furnace 1, dust-removal and desulfurizing filter 2, heat-exchanging water tank 3, air-introduced machine 4 and chimney 5, the dust-removal and desulfurizing filter 2
Multiple filter beds 6, the filter bed 6 is disposed with adsorbent layer 6-1, coarse-particle bed 6- by flue gas from top to bottom by direction
2nd, fine particle layer 6-3 and catalyst layer 6-4, the adsorbent of the adsorption layer is made of following preparation methods：The weight ratio is taken to be
20：20：12：1：2 flyash, calcium oxide, calcium sulfate, sodium hydroxide and di-iron trioxide is added to the water, heating water bath to 80
~90 DEG C, hydration reaction is carried out, hydration time 10~14 hours, then suction filtration, solid is put into heat drying in 180 DEG C of drying boxes
2 hours, produced after grinding.
The high-temperature flue gas that aluminium alloy sinters stove is produced is collected by the petticoat pipe on top respectively.In order that two sintering furnace energy phases
Pipeline is respectively provided with after mutual independently working, petticoat pipe towards deduster.In the presence of air-introduced machine 4, flue gas enters double filtering layers
Grain bed dust removal filter.Multilayer is provided with deduster and fixes filter bed 6, every layer of filter bed 6 connects an air exhaust branch pipe 7.Contain
Dust and gas body enters after deduster, by the filtering of double-layer filter material grain bed, is then discharged by air exhaust branch pipe 7.Clean gas leads to
The air exhaust branch pipe 7 for crossing every layer is pooled to total pipeline, and UTILIZATION OF VESIDUAL HEAT IN is carried out subsequently into heat-exchanging water tank 3.Gas after dedusting cooling
Discharged by air-introduced machine 4 by chimney 5.
Inorganic matter of the mineral origin in coal in flyash, in general it constitute, and silicate mineral is its main portion
Point, go back silica, pyrite, magnetic iron ore, carbonate, sulfate etc..Flyash and Ca (HO)2Water occurs under hydrothermal conditions
Reaction is closed, in fly ash grain Surface Creation hyrate.Hyrate is imperfect crystal thing, in threadiness, dries shape after dehydration
Into calcium-based desulfurizing agent there is larger specific surface area and higher retentiveness, to SO2Reaction and absorption performance is better than single Ca
(HO)2。
Add after di-iron trioxide, forming " activated centre " one by one on desulfurizing agent surface and inner surface (will can react
The center of molecule activation), it can improve the speed of desulphurization reaction.Simultaneously because these metal oxides are deposited in desulfurizing agent
So that the desulfurization reaction on desulfurizing agent surface has no longer been that Ca (OH) is surrounded as being generally considered to2Carry out, but around gold
Belong to oxide particle to carry out, because they can adsorb and discharge oxygen, product is not formed a fine and close shell, block
Surface pore, but change surface pore structure, the hole of deep layer is exposed, such reacting gas just can continuously
To the diffusion inside of desulfurizing agent.Improve the desulfuration efficiency of desulfurizing agent.Plus Fe2O3The calcium-based desulfurizing agent of hydration is at 700~800 DEG C
Desulfuration efficiency equally reaches more than 80%.At a temperature of 800 DEG C, utilization of the modified calcium-base desulfurizing agent than common calcium-based desulfurizing agent calcium
Rate improves about 2 times.
Wherein, the coarse-particle bed 6-2 is the expanded perlite that particle diameter is 2~5mm.The fine particle layer 6-32 is particle diameter
For 0.5~1mm fine sand.During filtering, ash-laden gas passes through filtering layer from top to bottom, first passes through coarse grained upper strata filter material layer, retains
Most dust in gas, then lower floor's filter material layer by fine grain, intercept and capture the fine dust for leaking through filtering layer.It is this thick
The step filtering of the fine filtering bed of material, can obtain individual layer filter material layer can not be while the filtration efficiency and High dust holding amount that reach.
Wherein, the quantity of the filter bed 6 is 8, secondary from top to bottom to be arranged in the dust-removal and desulfurizing filter 2, is contained
Dust and gas further improves dust-removal and desulfurizing filtering by that can be filtered after dust-removal and desulfurizing filter 2 by multiple filtration bed 6
The overall dust-removal and desulfurizing effect of device 2.
Wherein, the bottom of filter bed 6 is provided with air exhaust branch pipe 7, and the air exhaust branch pipe 7 is connected with air draft house steward 8, described
Air draft house steward 8 is connected with the heat-exchanging water tank 3.
Wherein, in addition to the blowback system of filter bed 6.The blowback system of filter bed 6 includes anti-blowpipe 9, the anti-blowpipe 9
One end is connected with the chimney 5, and the other end of the anti-blowpipe 9 is connected with the air exhaust branch pipe 7.Set on the anti-blowpipe 9
There is back blowing machine 10, the junction of the anti-blowpipe 9 and the air exhaust branch pipe 7 is provided with dynamoelectric switching valve 11.With filter layer
Dust is cumulative, and working resistance increases to range of set value (1200~1600Pa), and PLC starts reverse gas cleaning system.Deashing
Deashing is forced using downflow type layering blowback, under PLC controls, each layer of row is progressively first closed by electric pushrod control switching valve
Wind branch pipe 7, makes the layer be in off-line state, while this layer of back-blowing passage is opened, the part clean gas of chimney 5 by back-blowing
Machine 10, which is introduced, carries out blowback, closes reverse blow valve after blowback cleaning terminates, opens switching valve, is successively cleared up by this program.Blow
The dust deposit fallen is discharged in the bottom of deduster by ash exhauster timing.
After the sintering furnace flue gas ash removal desufurization system that the flue gas of sintering furnace 1 passes through the present embodiment, dust removal efficiency reaches
98.8%, sulfureous in flue gas oxide, the removal efficiency of nitrogen oxides are up to 90% and 60% respectively.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (8)
1. a kind of sintering furnace flue gas ash removal desufurization system, it is characterised in that：Sintering furnace, dust-removal and desulfurizing including being sequentially connected are filtered
Multiple filter beds are provided with device, heat-exchanging water tank, air-introduced machine and chimney, the dust-removal and desulfurizing filter, the filter bed presses cigarette
Gas is disposed with adsorbent layer, coarse-particle bed, fine particle layer and catalyst layer by direction from top to bottom, the adsorption layer
Adsorbent is made of following preparation methods：It is 20 to take weight ratio：15~25：10~15：0.5~1.5：1~3 flyash,
Calcium oxide, calcium sulfate, sodium hydroxide and di-iron trioxide are added to the water, and heating water bath carries out hydration reaction, water to 80~90 DEG C
10~14 hours conjunction time, then suction filtration, solid is put into heat drying 2 hours in 180 DEG C of drying boxes, produced after grinding.
2. a kind of sintering furnace flue gas ash removal desufurization system according to claim 1, it is characterised in that：The coarse-particle bed is
Particle diameter is 2~5mm expanded perlite.
3. a kind of sintering furnace flue gas ash removal desufurization system according to claim 1, it is characterised in that：The fine particle layer is
Particle diameter is 0.5~1mm fine sand.
4. a kind of sintering furnace flue gas ash removal desufurization system according to claim 1, it is characterised in that：The number of the filter bed
Measure as 8, it is secondary from top to bottom to be arranged in the dust-removal and desulfurizing filter.
5. a kind of sintering furnace flue gas ash removal desufurization system according to claim 4, it is characterised in that：The filter bed bottom
Air exhaust branch pipe is provided with, the air exhaust branch pipe is connected with air draft house steward, the air draft house steward is connected with the heat-exchanging water tank.
6. a kind of sintering furnace flue gas ash removal desufurization system according to claim 5, it is characterised in that：Also include filter bed anti-
Blow system.
7. a kind of sintering furnace flue gas ash removal desufurization system according to claim 6, it is characterised in that：The filter bed blowback
System includes anti-blowpipe, and described anti-blowpipe one end is connected with the chimney, the other end of the anti-blowpipe and the air exhaust branch pipe
Connection.
8. a kind of sintering furnace flue gas ash removal desufurization system according to claim 7, it is characterised in that：Set on the anti-blowpipe
Back blowing machine is equipped with, the junction of the anti-blowpipe and the air exhaust branch pipe is provided with dynamoelectric switching valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710526606.2A CN107158942A (en) | 2017-06-30 | 2017-06-30 | A kind of sintering furnace flue-gas dust-removing and desulfurization system |
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| CN201710526606.2A CN107158942A (en) | 2017-06-30 | 2017-06-30 | A kind of sintering furnace flue-gas dust-removing and desulfurization system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108837651A (en) * | 2018-06-24 | 2018-11-20 | 江苏兰丰环保科技有限公司 | A kind of desulphurization denitration dedusting collaboration processing unit |
| CN109059582A (en) * | 2018-10-10 | 2018-12-21 | 海南汉地阳光石油化工有限公司 | A kind of heat-exchanger rig |
| CN110548477A (en) * | 2018-05-30 | 2019-12-10 | 中国科学院过程工程研究所 | Adsorbing material and preparation method and application thereof |
| CN112403254A (en) * | 2020-11-20 | 2021-02-26 | 中国铝业股份有限公司 | Method for preparing desulfurizer by using red mud as raw material and desulfurizer prepared by method |
| CN115253664A (en) * | 2022-06-30 | 2022-11-01 | 山东玲珑轮胎股份有限公司 | Tire is polished and is used exhaust treatment device and system of polishing |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110548477A (en) * | 2018-05-30 | 2019-12-10 | 中国科学院过程工程研究所 | Adsorbing material and preparation method and application thereof |
| CN110548477B (en) * | 2018-05-30 | 2020-11-10 | 中国科学院过程工程研究所 | Adsorbing material and preparation method and application thereof |
| CN108837651A (en) * | 2018-06-24 | 2018-11-20 | 江苏兰丰环保科技有限公司 | A kind of desulphurization denitration dedusting collaboration processing unit |
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| CN112403254A (en) * | 2020-11-20 | 2021-02-26 | 中国铝业股份有限公司 | Method for preparing desulfurizer by using red mud as raw material and desulfurizer prepared by method |
| CN112403254B (en) * | 2020-11-20 | 2022-09-27 | 中国铝业股份有限公司 | Method for preparing desulfurizer by using red mud as raw material and desulfurizer prepared by method |
| CN115253664A (en) * | 2022-06-30 | 2022-11-01 | 山东玲珑轮胎股份有限公司 | Tire is polished and is used exhaust treatment device and system of polishing |
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Application publication date: 20170915 |