CN102961958A - Integrated system equipment for desulfurization and denitrification of flue gas - Google Patents
Integrated system equipment for desulfurization and denitrification of flue gas Download PDFInfo
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- CN102961958A CN102961958A CN2012104295614A CN201210429561A CN102961958A CN 102961958 A CN102961958 A CN 102961958A CN 2012104295614 A CN2012104295614 A CN 2012104295614A CN 201210429561 A CN201210429561 A CN 201210429561A CN 102961958 A CN102961958 A CN 102961958A
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- absorption tower
- flue gas
- feed bin
- gas desulfurization
- integral system
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Abstract
The invention relates to integrated system equipment for desulfurization and denitrification of flue gas. The equipment comprises an absorption tower, a bag dust collector, a draught fan and a chimney, which are successively connected, and further comprises an absorber storage bin, an absorbent storage bin and a humidifying mechanism. The absorber storage bin, the absorbent storage bin and the humidifying mechanism are all connected to an inlet of the absorption tower; an ash bucket outlet of the bag dust collector is connected with an air chute, which is connected to the inlet of the absorption tower. The equipment provided by the invention realizes desulfurization rate higher than 90% and denitrification rate of 50%-80%, and has advantages of high degree of automation, compact structure, small area occupation, and obvious technological advantage.
Description
Technical field
The present invention relates to a kind of flue gas desulfurization and denitrification integral system equipment.
Background technology
Sintering is the important operation of one in the modern steel enterprise, is the basis that blast furnace process obtains good quality and high output, and the production of iron and steel is played an important role.Because the iron ore major part of China all is lean ore, smelt less economically directly into stove, after therefore lean ore must being carried out fragmentation, selecting high-grade concentrate, again fine ore is sintered into enriched ore and just can enters blast furnace process.Secondly, will produce fine ore in the recovery process of rich ore, fine ore can cause that directly into stove blast furnace has some setbacks, and worsens the blast-furnace technique economic indicator, causes fine ore also must just can enter stove behind oversintering.A large amount of pollutants be can produce in the sintering process, particle, SO mainly contained
2
, NO
X
, HF, HCl, heavy metal be with bioxin etc.The SO that wherein produces in the sintering process
2
Account for iron and steel enterprise's more than 70% of total sulfur dioxide of discharging, indivedual enterprises reach about 90%.Therefore, steel industry becomes the second largest SO that China is only second to Thermal Power Generation Industry
2
Discharging department, the sulfur dioxide of annual discharging accounts for national total release about 10%.For tackling this Tough questions, will carry forward vigorously steel industry SO during " 12 "
2
Flue gas of sintering machine is implemented in full in total emission volumn control, and newly-built sintering machine is answered auxiliary construction desulphurization denitration facility." simultaneously; State Council and relevant department have also played file before this successively; explicitly call for: it is special that steel industry will be implemented steel industry technological progress and technological transformation; accelerate big-and-middle-sized iron and steel enterprise energy-saving and emission-reduction work paces; the recycling economy such as sintering flue gas desulfurization and energy-saving and emission-reduction technology are supported, and emphasis promotes steel industry sintering flue gas desulfurization denitration work to be carried out.
The flue gas that the steel sintering flue gas produces than other industrial furnaces has that exhaust gas volumn is large, dust is many, water capacity is large, corrosivity is strong and SO
2
, NO
X
The characteristics that change in concentration is large, but the technique that the steel sintering flue gas desulfurization and denitrification device that China has put into operation at present adopts still is in research and development and trial period in China, and the practical sulphur removal denitration effect remains further to be verified and assessment.
Summary of the invention
The purpose of this invention is to provide a kind of flue gas desulfurization and denitrification integral system equipment.
For achieving the above object, the technical solution used in the present invention is:
A kind of flue gas desulfurization and denitrification integral system equipment, comprise the absorption tower, sack cleaner, air-introduced machine and the chimney that connect successively, also comprise absorbent feed bin, adsorbent feed bin and humidification mechanism, described absorbent feed bin, adsorbent feed bin and humidification mechanism all are connected to described absorption tower; The ash bucket outlet of described sack cleaner is connected with air flume, and described air flume is connected to described absorption tower.
Preferably, described absorption tower is provided with the venturi pipeline section, is arranged on the expansion segment on described venturi pipeline section top, described absorbent feed bin, adsorbent feed bin and air flume are connected to the venturi pipeline section place on described absorption tower, flue gas enters and accelerates and form fluidization regions in the described venturi pipeline section, and described humidification mechanism is connected to the top that expansion segment is taken in described absorption.
Preferably, described absorption tower, sack cleaner are respectively arranged with preheating device.
Preferably, be provided with the calcium hydroxide that contains the oxidisability additive in the described absorbent feed bin.
Preferably, be provided with a kind of in coking coal powder, the active carbon or mix in the described adsorbent feed bin.
Because technique scheme is used, the present invention compared with prior art has following advantages:
1, plant equipment is few, volume compact, and other auxiliary equipment mainly are installed under deduster and the absorption tower, and floor space is relatively concentrated, has effectively controlled project investment;
2, high in technological content, fully automatic operation (need not the additional configuration personnel);
3, the system expandability is good;
4, high desulfurization efficiency is than low calcium-sulphur ratio.If press SO
2
The standard measuring and calculating of concentration of emission＜100 mg/Nm3, the economic calcium sulfur ratio of Germany technology measuring and calculating is between the 1.1-1.3, desulfuration efficiency is stabilized in more than 90%;
5, accessory substance yields poorly, and consumable usage is low:
A, high desulfurization rate and low calcium-sulphur ratio have been saved the consumption of absorbent calcium hydroxide, cause desulfurizing byproduct relatively less;
B, because of the not slurrying of EFA semi-dry desulphurization technology, just water guarantees reaction efficiency and control temperature, so the consumption of water is relatively less;
C, because EFA semi-dry desulphurization technological system is simple, electrical equipment is few, so the gentle consumption of electricity is relatively less;
D, Desulphurization circulation, this is so that the utilization of absorbent is optimized greatly, and consumption reaches minimum of a value.
6, can remove synchronously multiple pollutant component.
Can realize desulfurization and denitrification integral, and the pollutant components such as removal HCl, HF, dust and dioxin of synchronous high-efficiency rate, achieve many things at one stroke, can satisfy domestic more and more harsh steel industry sinter fume discharge standard.
Description of drawings
Accompanying drawing 1 is structural representation of the present invention.
Wherein: 1, absorption tower; 2, sack cleaner; 3, air-introduced machine; 4, chimney; 5, absorbent feed bin; 6, adsorbent feed bin; 7, humidification mechanism; 8, air flume; 9, preheating device;
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples:
A kind of flue gas desulfurization and denitrification integral system equipment as shown in Figure 1 comprises the absorption tower 1, sack cleaner 2, air-introduced machine 3 and the chimney 4 that connect successively.Wherein: the streaming absorption tower is draged for speed change in absorption tower 1, concrete structure is: be provided with the venturi pipeline section in absorption tower 1, be arranged on the expansion segment on venturi pipeline section top, the flue gas venturi pipeline section that 1 bottom enters wherein on the absorption tower accelerates, and forms fluidization regions after flue gas accelerates.
The integral system equipment comprises that also absorbent feed bin 5, adsorbent feed bin 6 and humidification mechanism 7, absorbent feed bin 5, adsorbent feed bin 6 all are connected to the venturi pipeline section place on absorption tower 1; In the present embodiment: be provided with the oxidisability absorbent of dry powder-shaped in the absorbent feed bin 5, be specially the calcium hydroxide that contains the oxidisability additive; Be provided with a kind of or mixing in coking coal powder, the active carbon in the adsorbent feed bin; Humidification mechanism 7 is connected to the expansion segment top on absorption tower 1, toward absorption tower 1 interior atomizing spray.
Ash bucket outlet at sack cleaner 2 is connected with air flume 8, and air flume 8 is connected to the venturi pipeline section place on absorption tower 1.In addition, absorption tower 1, sack cleaner 2 are respectively arranged with independent preheating device 9.When system starts, avoid dewfall.
The present invention adopts speed change to drag streaming absorption tower technique (Entrained Flow Absorber, EFA):
1 bottom enters the Venturi tube acceleration to the flue gas of steel sintering on the absorption tower, forms fluidization regions; The oxidisability absorbent of dry powder-shaped (calcium hydroxide that contains the oxidisability additive) and adsorbent (coking coal powder or active carbon) are from feed bin feeding absorption tower 1, and at the high density granular layer that in fluidization regions, forms fierce turbulence, absorbent and adsorbent fully mix with flue gas, with the SO in the flue gas
2
, SO
3
, NO
X
, the multiple pollutant generation serial physical chemical reactions such as HCl, HF, realize that desulphurization denitration etc. is integrated, the gas-solid mixture by absorption tower 1 enters special-purpose sack cleaner 2 and carries out further filtration, purification; After the dust that is filtered filters in sack cleaner 2, a part is back to absorption tower 1 recycling by air flume 8, guarantee that the absorbent that injects has higher desulfuration efficiency and denitration efficiency, be the high efficiency major reason of this technique, reduced simultaneously the interpolation use amount of absorbent; Then be transported to storage outward transport in the desulfurization ash silo through abundant reacted Desulphurization.
The key reaction principle that this technique relates to is as follows:
SO
3
+Ca(OH)
2
→CaSO
4
·1/2H
2
O+1/2H
2
O，
SO
2
+Ca(OH)
2
→CaSO
3
·1/2H
2
O+1/2H
2
O，
SO
2
+1/2O
2
+Ca(OH)
2
→CaSO
4
·1/2H
2
O+1/2H
2
O，
2HCl+Ca(OH)
2
→CaCl
2
+2H
2
O，
2HF+?Ca(OH)
2
→CaF
2
+2H
2
O，
NO+(oxidisability absorbent) → NO
2
,
3NO
2
+H
2
O→2HNO
3
+NO，
Ca(OH)
2
+2HNO
3
→Ca(NO
3
)
2
+2H
2
O。
Above-described embodiment only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with technique can understand content of the present invention and according to this enforcement, can not limit protection scope of the present invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (6)
1. a flue gas desulfurization and denitrification integral system is equipped, it is characterized in that: comprise the absorption tower, sack cleaner, air-introduced machine and the chimney that connect successively, also comprise absorbent feed bin, adsorbent feed bin and humidification mechanism, described absorbent feed bin, adsorbent feed bin and humidification mechanism all are connected to described absorption tower; The ash bucket outlet of described sack cleaner is connected with air flume, and described air flume is connected to described absorption tower.
2. flue gas desulfurization and denitrification integral system according to claim 1 is equipped, it is characterized in that: described absorption tower is provided with the venturi pipeline section, is arranged on the expansion segment on described venturi pipeline section top, described absorbent feed bin, adsorbent feed bin and air flume are connected to the venturi pipeline section place on described absorption tower, flue gas enters and accelerates and form fluidization regions in the described venturi pipeline section, and described humidification mechanism is connected to the top that expansion segment is taken in described absorption.
3. flue gas desulfurization and denitrification integral system according to claim 1 is equipped, and it is characterized in that: described absorption tower, sack cleaner are respectively arranged with preheating device.
4. flue gas desulfurization and denitrification integral system equipment according to claim 1 is characterized in that: be provided with the calcium hydroxide that contains the oxidisability additive in the described absorbent feed bin.
5. flue gas desulfurization and denitrification integral system equipment according to claim 1 is characterized in that: be provided with a kind of or mixing in coking coal powder, the active carbon in the described adsorbent feed bin.
6. flue gas desulfurization and denitrification integral system according to claim 1 is equipped, and it is characterized in that: described absorption tower adopts speed change to drag streaming absorption tower technique.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104295614A CN102961958A (en) | 2012-11-01 | 2012-11-01 | Integrated system equipment for desulfurization and denitrification of flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104295614A CN102961958A (en) | 2012-11-01 | 2012-11-01 | Integrated system equipment for desulfurization and denitrification of flue gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107198961A (en) * | 2017-06-13 | 2017-09-26 | 武汉钢铁有限公司 | Sinter flue dust sub-prime residual heat recovery and denitration coupling process |
| CN110975583A (en) * | 2019-12-19 | 2020-04-10 | 哈尔滨蔚蓝环保设备制造有限公司 | Semidry flue gas desulfurization device |
Citations (4)
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|---|---|---|---|---|
| US20030235525A1 (en) * | 2000-01-18 | 2003-12-25 | Shintaro Honjo | Method for the treating in exhaust gas and exhaust gas treating system |
| CN1962034A (en) * | 2006-10-25 | 2007-05-16 | 华北电力大学 | Method and apparatus for removing sulfur, nitrate and mercury simultaneously from boiler flue gas |
| CN101695627A (en) * | 2009-10-31 | 2010-04-21 | 福建龙净脱硫脱硝工程有限公司 | Dry-method fume gas purification method and device for synchronous desulfurization and denitrification |
| CN202893178U (en) * | 2012-11-01 | 2013-04-24 | 科林环保装备股份有限公司 | Flue gas desulfurization and denitrification integrated system equipment |
-
2012
- 2012-11-01 CN CN2012104295614A patent/CN102961958A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030235525A1 (en) * | 2000-01-18 | 2003-12-25 | Shintaro Honjo | Method for the treating in exhaust gas and exhaust gas treating system |
| CN1962034A (en) * | 2006-10-25 | 2007-05-16 | 华北电力大学 | Method and apparatus for removing sulfur, nitrate and mercury simultaneously from boiler flue gas |
| CN101695627A (en) * | 2009-10-31 | 2010-04-21 | 福建龙净脱硫脱硝工程有限公司 | Dry-method fume gas purification method and device for synchronous desulfurization and denitrification |
| CN202893178U (en) * | 2012-11-01 | 2013-04-24 | 科林环保装备股份有限公司 | Flue gas desulfurization and denitrification integrated system equipment |
Non-Patent Citations (1)
| Title |
|---|
| WALTER HARTIG等: "德国迪林根ROGESA钢铁公司2号烧结机EFA烟气处理系统及其运转情况", 《烧结球团》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107198961A (en) * | 2017-06-13 | 2017-09-26 | 武汉钢铁有限公司 | Sinter flue dust sub-prime residual heat recovery and denitration coupling process |
| CN107198961B (en) * | 2017-06-13 | 2020-06-02 | 武汉钢铁有限公司 | Sintering smoke quality-based waste heat recycling and denitration coupling process |
| CN110975583A (en) * | 2019-12-19 | 2020-04-10 | 哈尔滨蔚蓝环保设备制造有限公司 | Semidry flue gas desulfurization device |
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Application publication date: 20130313 |