CN103736377B - Method for gas-phase desulfurization of glue gas - Google Patents
Method for gas-phase desulfurization of glue gas Download PDFInfo
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- CN103736377B CN103736377B CN201410001813.2A CN201410001813A CN103736377B CN 103736377 B CN103736377 B CN 103736377B CN 201410001813 A CN201410001813 A CN 201410001813A CN 103736377 B CN103736377 B CN 103736377B
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Abstract
The invention relates to a method for gas-phase desulfurization of a glue gas. The method comprises the following steps: directly gasifying an efficient desulfurizer or gasifying the efficient desulfurizer in a heating manner; then injecting the gasified desulfurizer into a desulfurization reaction area; and performing a reaction on the gasified desulfurizer and SO2 in the flue gas in a full mixing manner at a certain temperature so as to reach the purpose of desulfurization. The desulfurization rate of the method reaches more than 95%. The method is less in desulfurizer adding amount, simple to run and operate; the running cost of the method is lower than that of an existing desulfurization method, so that the economic advantage of the method provided by the invention is obvious. As the method is used, the problems of high investment, high running and maintenance cost and complicated running operation of basic facilities adopted by the existing desulfurization technology are overcome. Thus, the method is suitable for the flue gas treatment of various industrial boilers and industrial furnaces.
Description
Technical field
The present invention relates to the method for a kind of flue gas gas phase desulfurization, particularly a kind of method utilizing efficient desulfurizing agent to carry out the desulfurization of flue gas gas phase, belongs to gas cleaning processing technology field.
Technical background
Along with China's expanding economy, it is also more and more serious that mass energy consumes the environmental pollution brought.China take coal as the country of main energy sources, and the harmful substance such as flue dust, sulfur dioxide, nitrogen oxide contained in coal-fired flue-gas causes severe contamination to air.
Heat-engine plant desulfurizedly to have passed by the course of decades at western developed country, the desulfur technology of research and development has hundreds of.What current input was applied also has tens kinds, and wherein widely used have ciculation fluidized bed process, in-furnace calcium spraying method, in-furnace calcium spraying tail flue gas humidification activation method, limestone/gypsum method, Dual alkali, wet-type ammonia, electronic beam method etc.There is various problems in existing desulfur technology, the fixed investment as lime stone-gypsum is large, desulphurization cost is high, and a large amount of gypsum of generation are difficult to process etc.It is high to there is desulphurization cost in Dual alkali, and desulfurization waste liquor causes serious secondary pollution problem.There is the problem such as the marketization of discharge of wastewater, ammonia damage, accessory substance stabilisation, byproduct quality, byproduct in the ammonia process of desulfurization, and system corrosion serious problems.
Based on this, develop a kind of easy to operate, focus that operating cost is low desulfur technology is the research of flue gas desulfurization field of purification.
Summary of the invention
The present invention is directed to the deficiency of existing desulfur technology, the method for a kind of flue gas gas phase desulfurization is provided, realize SO in coal-fired flue-gas
2process, with the problem that overcomes that the investment in fixed assets that existing desulfur technology exists is high, operation and maintenance cost is high, operation is complicated etc.
Summary of the invention
The invention provides a kind of flue gas gas phase sulfur method, the method is that a kind of efficient desulfurizing agent is injected conversion zone, at a certain temperature with the SO in flue gas
2abundant hybrid reaction, reaches the object of desulfurization.The method doctor solution consumption is few, and desulfuration efficiency is up to more than 95%, and investment and operating cost are lower than existing sulfur method, and economic advantages are obvious.
Detailed Description Of The Invention
A kind of flue gas gas phase sulfur method, comprises the steps:
(1) efficient desulfurizing agent is directly injected in reaction zone;
Or, by efficient desulfurizing agent heating and gasifying under 280 ~ 800 DEG C of conditions, inject in reaction zone after obtained gasificating desulfurization agent;
Described efficient desulfurizing agent be selected from one of component A, B component, component C or the two above arbitrarily than combination:
Component A be selected from ammonium acetate, ammonium citrate, ammonium chloride one or both of above arbitrarily than combination;
B component be selected from urea, biuret, cyanuric acid, melamine one or both of above arbitrarily than combination;
Component C be selected from urea formaldehyde condensates, urea condensation of acetone thing one or both of arbitrarily than combination;
(2) efficient desulfurizing agent in step (1) or the desulfurizing agent implantation temperature of gasification are the reaction zone of 500 ~ 1100 DEG C, mix with pending flue gas, reaction 1 ~ 5s;
SO in described efficient desulfurizing agent and pending flue gas
2the mol ratio of reacting dose is (0.1 ~ 1.2): 1.
Preferred according to the present invention, in described step (1), heating and gasifying temperature is 300 ~ 600 DEG C.
Preferred according to the present invention, in described step (1), efficient desulfurizing agent is pressed powder, and particle diameter is 50 ~ 300 orders; Preferably, the particle diameter of described efficient desulfurizing agent is 120 ~ 200 orders.
Preferred according to the present invention, the carrier gas of injecting reaction zone in described step (1) is the pending flue gas of 100 ~ 500 DEG C or the air of normal temperature; Preferred further, described carrier gas is the pending flue gas of 200 ~ 500 DEG C.
Preferred according to the present invention, the injection pressure of described efficient desulfurizing agent is 0 ~ 100kpa.The quality of the desulfurizing agent of injection pressure numerical value and conveying has direct relation, and this pressure is beneficial to after desulfurizing agent enters reaction zone and fully mixes with pending flue gas.
Preferred according to the present invention, in described step (2), pending flue gas is the flue gas through dust removal process.Preferred further, described dust removal process is cyclone dust removal or bag-type dust.
Preferred according to the present invention, the reaction zone temperature in described step (2) is 650 ~ 1000 DEG C.Too high or too low for temperaturely all can cause the loss of reactant and the decline of removal efficiency.
Preferred according to the present invention, SO in efficient desulfurizing agent and pending flue gas in described step (2)
2the mol ratio of reacting dose is (0.5 ~ 1): 1.
Preferred according to the present invention, in described step (2), the reaction time is 1.5 ~ 5s.
Beneficial effect of the present invention
1, the present invention is compared with prior art, have investment and operating cost is low, technological process is simple, floor space is little, easy to operate, desulfuration efficiency reaches more than 95%;
2, a kind of efficient desulfurizing agent of the present invention and SO
2reaction efficiency high, reaction consumption few, saved desulphurization system investment and operating cost;
3, gas phase desulfur technology of the present invention only need once inject efficient desulfurizing agent of the present invention, can realize flue gas desulfurization, is applicable to flue gas or the vent gas treatment of station boiler and multiple Industrial Boiler and Industrial Stoves.
Detailed description of the invention
Below in conjunction with embodiment, technical scheme of the present invention is described further, but institute of the present invention protection domain is not limited thereto.
Pending flue gas described in embodiment is coal steam-electric plant smoke, SO
2be about 3000mg/m
3.
Embodiment 1
A kind of flue gas gas phase sulfur method, comprises the steps:
(1) utilize air to do carrier gas, the mixture of urea 805.5kg and ammonium chloride 78.5kg and desulfurizing agent are injected reaction zone, the SO in desulfurization denitrification agent and flue gas
2mol ratio is 0.9:1, and injection pressure is 35kpa;
(2) be under the condition of 850 DEG C at reaction zone temperature, after reaction 2s;
SO in flue gas before and after flue gas analyzer check processing
2concentration, calculates SO
2removal efficiency reaches 96.0%.
Embodiment 2
Flue gas gas phase sulfur method as described in Example 1, difference is: be 950 DEG C at reaction zone temperature, and the reaction time is 2s.SO in flue gas before and after flue gas analyzer check processing
2concentration, calculates SO
2removal efficiency reaches 98.0%.
Embodiment 3
Flue gas gas phase sulfur method as described in Example 1, difference is: adding in heater by desulfurizing agent, and temperature controls at 480 DEG C ~ 500 DEG C heating and gasifyings, obtained gasificating desulfurization agent.Utilize temperature to be that the pending flue gas of 500 DEG C does carrier gas, inject reaction zone, reaction zone temperature is 850 DEG C, and the reaction time is 2s.
SO in flue gas before and after flue gas analyzer check processing
2concentration, calculates SO
2removal efficiency reaches 97.0%.
Embodiment 4
Pending flue gas is with embodiment 1.
A kind of flue gas gas phase sulfur method, comprises the steps:
(1) utilize temperature to be that the pending flue gas of 500 DEG C does carrier gas, cyanuric acid 680kg is injected reaction zone, the SO in desulfurizing agent and pending flue gas
2the mol ratio of reacting dose be 0.8:1, injection pressure 25kpa;
(2) be under the condition of 850 DEG C at reaction zone temperature, after reaction 2s;
SO in flue gas before and after flue gas analyzer check processing
2concentration, calculates SO
2removal efficiency reaches 97.7%.
Embodiment 5
Pending flue gas is with embodiment 1.
A kind of flue gas gas phase sulfur method, comprises the steps:
(1) utilize air to do carrier gas, the mixture of urea 805.5kg and ammonium citrate 100kg is injected reaction zone as a kind of efficient desulfurizing agent, the SO in desulfurizing agent and pending flue gas
2the mol ratio of reacting dose be 0.9:1, injection pressure 38kpa;
(2) be under the condition of 850 DEG C at reaction zone temperature, after reaction 2s;
SO in flue gas before and after flue gas analyzer check processing
2concentration, calculates SO
2removal efficiency reaches 95.8%.
Embodiment 6
Pending flue gas is with embodiment 1.
A kind of flue gas gas phase sulfur method, comprises the steps:
(1) utilize temperature to be that the flue gas of 300 DEG C does carrier gas, the mixture of a kind of desulfurizing agent biuret 600kg and ammonium chloride 88.5kg is injected reaction zone, the SO in desulfurizing agent and pending flue gas
2the mol ratio of reacting dose be 0.9:1, injection pressure 30kpa;
(2) be under the condition of 850 DEG C at reaction zone temperature, after reaction 1s;
SO in flue gas before and after flue gas analyzer check processing
2concentration, calculates SO
2removal efficiency reaches 96.3%.
Embodiment 7
Pending flue gas is with embodiment 1.
A kind of flue gas gas phase sulfur method, comprises the steps:
(1) utilize temperature to be that the pending flue gas of 450 DEG C does carrier gas, the mixture of a kind of desulfurizing agent cyanuric acid 580kg and ammonium acetate 50kg is directly injected reaction zone, the SO in desulfurizing agent and pending flue gas
2the mol ratio of reacting dose be 0.9:1, injection pressure 28kpa;
(2) be under the condition of 850 DEG C at reaction zone temperature, after reaction 3s;
SO in flue gas before and after flue gas analyzer check processing
2concentration, calculates SO
2removal efficiency reaches 96.7%.
Embodiment 8
Pending flue gas is with embodiment 1.
A kind of flue gas gas phase sulfur method, comprises the steps:
(1) utilize air to do carrier gas, desulfurizing agent urea condensation of acetone thing 750kg is injected reaction zone, the SO in desulfurizing agent and pending flue gas
2the mol ratio of reacting dose be 0.9:1, injection pressure 35kpa;
(2) be under the condition of 850 DEG C at reaction zone temperature, after reaction 5s;
SO in flue gas before and after flue gas analyzer check processing
2concentration, calculates SO
2removal efficiency reaches 94.8%.
Claims (12)
1. a flue gas gas phase sulfur method, is characterized in that, comprises the steps:
(1) efficient desulfurizing agent is directly injected in reaction zone;
Or, by efficient desulfurizing agent heating and gasifying under 280 ~ 800 DEG C of conditions, inject in reaction zone after obtained gasificating desulfurization agent;
Described efficient desulfurizing agent be selected from one of component A, B component, component C or the two above arbitrarily than combination:
Component A be selected from ammonium acetate, ammonium citrate, ammonium chloride one or both of above arbitrarily than combination;
B component be selected from urea, biuret, cyanuric acid, melamine one or both of above arbitrarily than combination;
Component C be selected from urea formaldehyde condensates, urea condensation of acetone thing one or both of arbitrarily than combination;
(2) efficient desulfurizing agent in step (1) or the desulfurizing agent implantation temperature of gasification are the reaction zone of 500 ~ 1100 DEG C, mix with pending flue gas, reaction 1 ~ 5s;
SO in described efficient desulfurizing agent and pending flue gas
2the mol ratio of reacting dose is (0.1 ~ 1.2): 1.
2. flue gas gas phase sulfur method as claimed in claim 1, is characterized in that, in described step (1), heating and gasifying temperature is 300 ~ 600 DEG C.
3. flue gas gas phase sulfur method as claimed in claim 1, is characterized in that, in described step (1), efficient desulfurizing agent is pressed powder, and particle diameter is 50 ~ 300 orders.
4. flue gas gas phase sulfur method as claimed in claim 3, is characterized in that, in described step (1), the particle diameter of efficient desulfurizing agent is 120 ~ 200 orders.
5. flue gas gas phase sulfur method as claimed in claim 1, is characterized in that, the carrier gas of injecting reaction zone in described step (1) is the pending flue gas of 100 ~ 500 DEG C or the air of normal temperature.
6. flue gas gas phase sulfur method as claimed in claim 5, it is characterized in that, described carrier gas is the pending flue gas of 200 ~ 500 DEG C.
7. flue gas gas phase sulfur method as claimed in claim 1, it is characterized in that, the injection pressure of described efficient desulfurizing agent is 0 ~ 100kpa.
8. flue gas gas phase sulfur method as claimed in claim 1, it is characterized in that, in described step (2), pending flue gas is the flue gas through dust removal process.
9. flue gas gas phase sulfur method as claimed in claim 8, it is characterized in that, described dust removal process is cyclone dust removal or bag-type dust.
10. flue gas gas phase sulfur method as claimed in claim 1, it is characterized in that, the reaction zone temperature in described step (2) is 650 ~ 1000 DEG C.
11. flue gas gas phase sulfur methods as claimed in claim 1, is characterized in that, SO in efficient desulfurizing agent and pending flue gas in described step (2)
2the mol ratio of reacting dose is (0.5 ~ 1): 1.
12. flue gas gas phase sulfur methods as claimed in claim 1, is characterized in that, in described step (2), the reaction time is 1.5 ~ 5s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410001813.2A CN103736377B (en) | 2014-01-02 | 2014-01-02 | Method for gas-phase desulfurization of glue gas |
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| CN201410001813.2A CN103736377B (en) | 2014-01-02 | 2014-01-02 | Method for gas-phase desulfurization of glue gas |
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| CN103736377B true CN103736377B (en) | 2015-07-15 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104014232A (en) * | 2014-06-24 | 2014-09-03 | 山东大学 | Method for performing smoke desulfurization and denitrification by using urea co-production preparation technology |
| CN106215681A (en) * | 2016-07-25 | 2016-12-14 | 合肥天翔环境工程有限公司 | Flue gas compound desulfurization denitrification agent and preparation method thereof |
| CN106390727B (en) * | 2016-10-27 | 2019-10-18 | 福建龙净脱硫脱硝工程有限公司 | A kind of dry desulfurizing process handling low-temperature flue gas |
| CN109499332A (en) * | 2018-12-05 | 2019-03-22 | 萍乡市华星环保工程技术有限公司 | Industrial smoke dry type high efficiency desulfurization denitration method |
| CN109603480A (en) * | 2018-12-29 | 2019-04-12 | 四川大学 | A kind of SO2Sulfur method |
| CN117000021B (en) * | 2023-09-21 | 2024-01-19 | 河北耀一节能设备制造有限责任公司 | Lime gypsum desulfurization device and desulfurization method thereof |
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|---|---|---|---|---|
| DE4023030A1 (en) * | 1989-07-19 | 1991-01-24 | Hitachi Shipbuilding Eng Co | DRYING PROCESS FOR TREATING COMBUSTION GASES |
| CN101555025A (en) * | 2009-05-08 | 2009-10-14 | 山东大学 | Preparation method of ammonia for coal-fired flue gas desulfurization and denitration by coproduction |
| CA2487964C (en) * | 2002-06-05 | 2010-09-28 | Exxonmobil Research And Engineering Company | Oxidation of nox's with sodium chlorite in combination with a thermal nox removal process |
| US7906090B2 (en) * | 2009-07-06 | 2011-03-15 | Mitsubishi Heavy Industries, Ltd. | Mercury reduction system and mercury reduction method of flue gas containing mercury |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2977759B2 (en) * | 1996-03-01 | 1999-11-15 | 川崎重工業株式会社 | Exhaust gas dry treatment method and apparatus |
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- 2014-01-02 CN CN201410001813.2A patent/CN103736377B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4023030A1 (en) * | 1989-07-19 | 1991-01-24 | Hitachi Shipbuilding Eng Co | DRYING PROCESS FOR TREATING COMBUSTION GASES |
| CA2487964C (en) * | 2002-06-05 | 2010-09-28 | Exxonmobil Research And Engineering Company | Oxidation of nox's with sodium chlorite in combination with a thermal nox removal process |
| CN101555025A (en) * | 2009-05-08 | 2009-10-14 | 山东大学 | Preparation method of ammonia for coal-fired flue gas desulfurization and denitration by coproduction |
| US7906090B2 (en) * | 2009-07-06 | 2011-03-15 | Mitsubishi Heavy Industries, Ltd. | Mercury reduction system and mercury reduction method of flue gas containing mercury |
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