CN103657365A - Kiln flue gas purification system based on brown ring reaction - Google Patents
Kiln flue gas purification system based on brown ring reaction Download PDFInfo
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- CN103657365A CN103657365A CN201210364326.3A CN201210364326A CN103657365A CN 103657365 A CN103657365 A CN 103657365A CN 201210364326 A CN201210364326 A CN 201210364326A CN 103657365 A CN103657365 A CN 103657365A
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- Prior art keywords
- flue gas
- reaction
- brown ring
- absorption
- iron
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention relates to an engineering system for removing NOx in kiln flue gas without any catalyst but on the basis of a brown ring reaction in chemistry. An accelerant can be used for effectively removing the NO-based NOx in the flue gas. According to the main reaction, FeSO4 and NO react with each other to generate Fe(NO)SO4. Compared with existing methods, such as an oxidation method and a selective catalytic reduction (SCR) method, for removing NOx in flue gas, the engineering system has the beneficial effects that the system is simple in structure, low in equipment investment and high in reliability, and a dust collection system is not needed; the absorption reaction temperature is low, and the system can effectively work at the flue gas temperature of not more than 150 DEG C; an absorbent can be collected and treated; the system can be used for treating flue gas generated by combustion of high-sulfur coal; the system can be widely applied to small and medium-sized boilers, industrial kilns and the like.
Description
Technical field
The present invention relates to field of environmental engineering, be specifically related to the cleaning system of flue gas
Background technology
At present, the coal-burning boiler of China removes NO
xmain method be SCR and SCNR method, due to price, improvement cost is high, extremely need a kind of cheap reliable device, can be widely used in the desulphurization denitration engineering of middle-size and small-size kiln, several parts that SCR method system is the most expensive are: catalyst, accuracy-control system, improvement expenses, simultaneously operating cost is large, is unfavorable for applying on the boiler of 40 tons of <.
Summary of the invention
The object of the invention is to the brown ring reaction in applied chemistry, overcome above-mentioned shortcoming and do not need special deduster, provide a kind of and can adapt to sulphur coal, can utilize again absorbent to obtain the way of operation income, can be widely used in the boiler of 40 tons of < simultaneously.
Technical scheme of the present invention is:
The spray sulphur removal desulfurizing tower that a kind of kiln gas cleaning project system based on the reaction of brown ring is reacted by improved Venturi tube and forming based on bubbling absorption column and an inclined plate sedimentation pond, utilize spray to give a dinner of welcome flue dust and H that tower washes out
2sO
3the blast furnace slag reaction of placing in inclined plate sedimentation pond and pond generates FeSO
4, FeSO
3and H
2sO
3deng material, pump into again and in absorption tower, absorb the NO in flue gas, main reaction be brown ring reaction:
FeSO
4+NO→Fe(NO)SO
4
Absorption liquid after absorption is discharged, and this structural design does not adopt catalyst mode, mainly uses the SO in flue gas
2in water and cigarette ash neutral and alkali material Fe
2o
3, CaO, MgO reacts and the NO in flue gas is absorbed, and can add the Fe that part is additional where necessary
2o
3(Iron-ore Slag).
Below in conjunction with accompanying drawing, the present invention is described in detail.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
1---improve Venturi tube spraying and dedusting desulfurizing tower, 2---Venturi tube throat, 3---fan type nozzle, 4---Venturi expansion segment, 5---spray thrower, 6 inclined plate sedimentation ponds, 7---the liquid after filtration, 8---bubbling absorber, 9---demister, 10---absorption liquid, 11---chimney, 12---air-introduced machine, 13---flue gas, 14---alkaline residue water.
The specific embodiment
As shown in Figure 1: the fan type nozzle that boiler alkaline residue water enters the throat 2 of Venturi enters in Venturi, and the SO in flue gas
2react and use in flue gas dust to infiltrate and accelerate in the expansion segment 4 of Venturi, being deposited on the bottom of spray column 1, flue gas and then be formed on the secondary spraying 5 of ascent stage in uphill process by the liquid 7 that comes from settling tank levigation, liquid is absorbing SO
2with after flue dust, enter the ironmaking slag placed in settling tank neutralization pond and soak reaction, solution 10 after complexing absorption NO wherein forms and absorbs, after purifying, gas enters chimney 11 through demister 9 by air-introduced machine 12 and discharges.
Claims (2)
1. one kind does not have conventional deduster, without any need for catalyst, the system of absorption NO based on brown ring reaction, by throat's improved Venturi tube spray mode, in dedusting and desulfurization integrated spray column 1, after dust-laden spray, enter in inclined plate sedimentation pond 6 and the reaction of additional iron-containing slag, the smoke reaction that leaches solution in the modified bubble absorbing tower 8 of secondary and after spraying and dedusting, absorb after NO wherein, purifying smoke is discharged through chimney 11, it is characterized in that: use the venturi spraying desulfurization of giving a dinner of welcome, iron-containing slag and reacting in 1 and 5 containing the sulfurous acid of alkaline flue dust, after reaction liquid after filtration improves as the second level, bubble tower removes NO
xabsorbent.
2. according to system described in (1), it is characterized by: alkaline residue water shower flue gas absorption flue dust also absorbs the SO in flue dust
2and form the FeSO that can adsorb NO with iron-containing slag in inclined plate sedimentation pond
4or FeSO
3solution and H
2sO
3solution mixture, in secondary absorption tower 8, the brown ring reaction of final formation or similarly reaction, complete the removal of NO in flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210364326.3A CN103657365A (en) | 2012-09-24 | 2012-09-24 | Kiln flue gas purification system based on brown ring reaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210364326.3A CN103657365A (en) | 2012-09-24 | 2012-09-24 | Kiln flue gas purification system based on brown ring reaction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103657365A true CN103657365A (en) | 2014-03-26 |
Family
ID=50296860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210364326.3A Pending CN103657365A (en) | 2012-09-24 | 2012-09-24 | Kiln flue gas purification system based on brown ring reaction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103657365A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103961988A (en) * | 2014-05-19 | 2014-08-06 | 张继惟 | Technical method of purification of flue gas with high water content and major fluctuations |
| CN106000076A (en) * | 2015-07-08 | 2016-10-12 | 黄立维 | Ferric chloride solid particles for denitration and preparation method and device thereof |
| CN109621687A (en) * | 2017-10-09 | 2019-04-16 | 陈雅华 | Flue gas and the contact desulfuriation of Multilayer Network liquid film, denitration, dedusting, heat-exchange method |
-
2012
- 2012-09-24 CN CN201210364326.3A patent/CN103657365A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103961988A (en) * | 2014-05-19 | 2014-08-06 | 张继惟 | Technical method of purification of flue gas with high water content and major fluctuations |
| CN106000076A (en) * | 2015-07-08 | 2016-10-12 | 黄立维 | Ferric chloride solid particles for denitration and preparation method and device thereof |
| CN109621687A (en) * | 2017-10-09 | 2019-04-16 | 陈雅华 | Flue gas and the contact desulfuriation of Multilayer Network liquid film, denitration, dedusting, heat-exchange method |
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|---|---|---|---|
| DD01 | Delivery of document by public notice |
Addressee: Zhang Jiwei Document name: Notification of Passing Preliminary Examination of the Application for Invention |
|
| PB01 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhang Jiwei Document name: Notification of Publication of the Application for Invention |
|
| DD01 | Delivery of document by public notice |
Addressee: Zhang Jiwei Document name: Notification of before Expiration of Request of Examination as to Substance |
|
| DD01 | Delivery of document by public notice |
Addressee: Zhang Jiwei Document name: Notification that Application Deemed to be Withdrawn |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |