CN102000504A - SCR denitration device for flue gas of glass furnace - Google Patents
SCR denitration device for flue gas of glass furnace Download PDFInfo
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- CN102000504A CN102000504A CN2010102936802A CN201010293680A CN102000504A CN 102000504 A CN102000504 A CN 102000504A CN 2010102936802 A CN2010102936802 A CN 2010102936802A CN 201010293680 A CN201010293680 A CN 201010293680A CN 102000504 A CN102000504 A CN 102000504A
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Abstract
The invention discloses a silicon controlled rectifier (SCR) denitration device for flue gas of a glass furnace, which comprises a flue gas flow controller, an ammonia/flue gas mixed flue, a liquid ammonia bottle, a pressure reducing valve, an ammonia preheater, a flow meter, an ammonia injection controller, an electric heater and a reactor bed. One end of the ammonia/flue gas mixed flue is connected with a flue pipe of the glass furnace; the flue gas flow controller is arranged on the flue; the flue gas flow controller is connected with the ammonia injection controller through a data line and controls the flow meter which is connected to the ammonia injection controller; one end of the flow meter is connected with the ammonia/flue gas mixed flue pipe and the other end of the flow meter is connected with the ammonia preheater, the pressure reducing valve and the liquid ammonia bottle; the ammonia/flue gas mixed flue is connected with the electric heater through the flue; and the reactor bed is arranged inside the electric heater and is connected with a chimney pipe through the flue. The SCR denitration device has the advantages that: the device has higher removal efficiency and lower reaction temperature, needs less energy required by gas heating, saves the production cost, improves the exhaust temperature, and reduces the acid corrosion of the flue.
Description
Technical field
The invention belongs to the Air Pollution Control field of environmental pollution improvement, relate to a kind of SCR denitrification apparatus, especially be applied to the SCR denitrification apparatus of a kind of glass furnace fume on the denitration of glass furnace fume.
Background technology
At present, China NO
XDischarge increasingly, not only brought acid rain and human injury, more brought enormous economic loss.Therefore, in recent years, China had actively developed the denitrating flue gas project of thermal power plant, and selective catalytic reduction (SCR) is widely used as the most ripe, the effective method of generally acknowledging at present.Glass furnace is as NO
XAnother main path in source, its main smoke characteristic is NO
XThe concentration height, more difficult than general thermal power plant.Present main methods liquid absorption method and solid absorption method not only the energy consumption height, administer not thoroughly, also easily cause secondary pollution.And mainly there is the problem of catalyst and treating apparatus in present selected selective catalytic reduction, at first be exactly that catalyst requirement temperature is higher, Outlet Gas Temperature does not reach requirement, and secondly treating apparatus is comparatively complicated, and is bigger for the improvement project of glass furnace.
Summary of the invention
The problem of bringing in order to overcome the glass furnace fume own characteristic the invention provides a kind of SCR denitrification apparatus of glass furnace, and this device cooperates low-temperature SCR catalyst not only can be to higher concentration NO
XFlue gas is handled, and more can provide NO
XHandle needed suitable temperature.
Technical solution of the present invention is: a kind of SCR denitrification apparatus of glass furnace fume, this device comprise flue gas flow controller 2, ammonia/flue gas mixing flue 3, liquefied ammonia bottle 4, pressure-reducing valve 5, ammonia preheater 6, flowmeter 7 and spray ammonia controller 8, heater 9 and reactor bed 10;
Wherein, the flue tube of described ammonia/flue gas mixing flue 3 one ends and glass furnace 1 connects, described flue is provided with flue gas flow controller 2, and described flue gas flow controller 2 is connected with described spray ammonia controller 8 by data wire, and described spray ammonia controller 8 is connected with flowmeter 7 by data wire; Described flowmeter 7 one ends connect with described ammonia/flue gas mixing flue 3 pipes, and other end order pipe is connected to ammonia preheater 6, pressure-reducing valve 5 and liquefied ammonia bottle 4; Described ammonia/flue gas mixing flue 3 other ends connect by flue and electric heater 9 pipes, and described electric heater 9 is arranged at the outer ring of reactor, and the inner ring of reactor is provided with reactor bed 10, and reactor bed 10 connects by flue and chimney 12 pipes.
Further, described electric heater 9 is made up of many groups of parallel electric heating pieces.
Further, the built-in multi-layer catalyst layer of described reactor bed, and every layer of useful load of catalyst is 0.5～1m
3
Further, the flue between the described chimney 12 of reactor bed 10 and cigarette is provided with extraction fan 11, is used for flue gas after being purified is quickened discharging.
Further, the flue gas flow ratio in described ammonia/flue gas mixing flue (3) is: 1～1.2/1.
The scale that the present invention handles glass furnace fume is calculated according to exhaust gas volumn and is satisfied 2000～10000Nm
3/ h, NO
XConcentration satisfies 1000～3000ppm, and reaction temperature satisfies 250～300 ℃.After the flue gas of glass furnace (1) comes out from kiln by pipeline, enter mist flue 3 by flue gas flow control appliance 2, flue gas flow control appliance 2 is arranged at before the mist flue 3, and flue gas flow control appliance 2 feeds back to spray ammonia controller 8 with the flue gas flow data by computer simultaneously; Simultaneously, liquefied ammonia enters ammonia preheater 6 after liquefied ammonia bottle 4 comes out by pressure-reducing valve 5, behind flue, enter flowmeter 7, flowmeter 7 is regulated ammonia flow by the feedback data that spray ammonia controller 8 obtains, and enters mist flue 3 after making ammonia reach corresponding flow; Gas enters NO after mixing through mist flue 3
XTreating apparatus.Mist at first enters NO from the bottom
XThe electric heater 9 for the treatment of apparatus outer ring, the electric heating sheets by series of parallel is that gas reaches certain temperature, enters reactor bed 10 then from top, behind the beds and catalyst haptoreaction through 5 layers of row, is purified flue gas.Because flue gas pressures is not enough, therefore, purify flue gas and under air exhauster 11 effects, in the middle of reactor bottom, discharge, discharge from chimney 12.All connect between the flue by flue flange.
Main feature of the present invention is:
1. this device reaction temperature range is wider and lower, all can in 250～300 ℃ of scopes.General glass furnace gas is after steps such as desulfurization, dedusting, and outlet temperature is generally 50～70 ℃, can react between 250～300 ℃ through the heating back, has reduced loaded down with trivial details equipment and energy resource consumption that the gas heating brings.
2. the strict control spray of spray ammonia department ammonia concentration guarantees that the exhaust gas volumn of ammonia and pending gas remains between 1/1～1.2/1, and the denitration rate can reach 95%, and the ammonia utilization rate is up to 90%.
This device advantage is: removal efficiency is higher, generally can reach more than 95%, is higher than common denitration facility; Reaction temperature is lower, and gas heating institute energy requirement is less, has saved the production run cost; The discharging flue-gas temperature has improved 40～50 ℃, has reduced the acid corrosion of flue.
Description of drawings
Fig. 1 is the structural representation of the SCR denitrification apparatus of a kind of glass furnace fume of the present invention.
Among the figure:
1. glass furnace 7. flowmeters
2. flue gas flow controller 8. sprays the ammonia controllers
3. ammonia/flue gas mixing flue 9. electric heaters
4. liquefied ammonia bottle 10. reactor bed
5. pressure-reducing valve 11. air exhausters
6. ammonia preheater 12. chimneys
The specific embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is described further.
Figure 1 shows that the structural representation of the SCR denitrification apparatus of a kind of glass furnace fume of the present invention.The SCR denitrification apparatus of a kind of glass furnace fume of the present invention as shown in Figure 1, this device is by flue gas flow controller 2, ammonia/flue gas mixing flue 3, and liquefied ammonia bottle 4, pressure-reducing valve 5, ammonia preheater 6, flowmeter 7 and spray ammonia controller 8, electric heater 9 and reactor bed 10 are formed;
The flue of glass furnace 1 connects with an end pipe of ammonia/flue gas mixing flue 3, glass furnace 1 is provided with flue gas flow controller 2 with flue between ammonia/flue gas mixing flue 3, flow controller 2 is connected with spray ammonia controller 8 by data wire, and spray ammonia controller 8 is connected with flowmeter 7 by data wire; Liquefied ammonia bottle 4 connects by pressure-reducing valve 5 and ammonia preheater 6 pipes, and ammonia preheater 6 connects by flowmeter 7 and mist flue 3 pipes; Ammonia/flue gas mixing flue 3 other ends connect by flue and electric heater 9 pipes, and reactor bed 10 is set in the electric heater 9, and reactor bed 10 connects by flue and chimney 12 pipes, and flue is provided with air exhauster 11.
Liquefied ammonia passes through pressure-reducing valve 5 decompressions from liquefied ammonia bottle 4 after, gasify by ammonia preheater 6, the ammonia of making enters into flowmeter 7, for make ammonia enough can be uniformly and flue gas mix, glass furnace 1 is provided with flue gas flow controller 2 with mist flue 3 flues, when flue gas is flowed through flue gas flow controller 2, the flue gas flow data are fed back to spray ammonia controller 8 by computer, spray ammonia controller 8 enters ammonia flow in the mist flue 3 for flowmeter 7 controls feedback information, ammonia is mixed in the flue gas fully to be gone, mixing back gas enters from electric heater 9 bottoms by flue, electric heating sheets by series of parallel reaches certain temperature with mist, enter reactor bed 10 then from top, behind the beds and catalyst haptoreaction through 5 layers of row, be purified flue gas, under air exhauster 11 effects, in the middle of reactor bottom, discharge, discharge from chimney 12.
Claims (5)
1. the SCR denitrification apparatus of a glass furnace fume, it is characterized in that this device comprises flue gas flow controller (2), ammonia/flue gas mixing flue (3), liquefied ammonia bottle (4), pressure-reducing valve (5), ammonia preheater (6), flowmeter (7) and spray ammonia controller (8), heater (9) and reactor bed (10);
Wherein, the flue tube of described ammonia/flue gas mixing flue (3) one ends and glass furnace (1) connects, flue between described ammonia/described glass furnace of flue gas mixing flue (3) (1) is provided with flue gas flow controller (2), described flue gas flow controller (2) is connected with described spray ammonia controller (8) by data wire, and described spray ammonia controller (8) is connected with flowmeter (7) by data wire; Described flowmeter (7) one ends connect with described ammonia/flue gas mixing flue (3) pipe, and other end order pipe is connected to ammonia preheater (6), pressure-reducing valve (5) and liquefied ammonia bottle (4); Described ammonia/flue gas mixing flue (3) other end connects by flue and electric heater (9) pipe, described electric heater (9) is arranged at the outer ring of whole reactor, the reactor inner ring is provided with reactor bed (10), and reactor bed (10) connects by flue and chimney (12) pipe.
2. denitrification apparatus as claimed in claim 1 is characterized in that: described electric heater (9) is made up of many groups of parallel electric heating pieces.
3. denitrification apparatus as claimed in claim 1 is characterized in that: the built-in multi-layer catalyst layer of described reactor bed (10), and the catalyst loading amount is 0.5～1m
3
4. denitrification apparatus as claimed in claim 1 is characterized in that: the flue between reactor bed (10) and the described chimney of cigarette (12) is provided with extraction fan (11), is used for flue gas after being purified is quickened discharging.
5. denitrification apparatus as claimed in claim 1, the flue gas flow ratio in described ammonia/flue gas mixing flue (3) is: 1～1.2/1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102936802A CN102000504A (en) | 2010-09-27 | 2010-09-27 | SCR denitration device for flue gas of glass furnace |
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|---|---|---|---|
| CN2010102936802A CN102000504A (en) | 2010-09-27 | 2010-09-27 | SCR denitration device for flue gas of glass furnace |
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| CN102000504A true CN102000504A (en) | 2011-04-06 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102961963A (en) * | 2012-11-28 | 2013-03-13 | 南京金美镓业有限公司 | High-concentration nitrogen oxide waste gas catalytic decomposing device |
| CN104020792A (en) * | 2014-05-23 | 2014-09-03 | 国家电网公司 | Automatic control system for flue gas denitration of electric power plant |
| CN104399370A (en) * | 2014-12-03 | 2015-03-11 | 无锡雪浪环境科技股份有限公司 | Lower temperature flue gas SCR (Selective Catalytic Reduction) denitration system and process |
| CN104722203A (en) * | 2015-03-19 | 2015-06-24 | 北京博惠通科技发展有限公司 | SCR denitration control system and SCR denitration control method of heating furnace flue gas |
| CN106422710A (en) * | 2016-11-17 | 2017-02-22 | 上海华之邦科技股份有限公司 | High-capacity denitration apparatus |
| CN107261823A (en) * | 2017-06-30 | 2017-10-20 | 东南大学 | Improve the plate-type denitration catalyst of coal fired power plant SCR system underrun ability |
| CN107983155A (en) * | 2017-12-26 | 2018-05-04 | 中冶京诚工程技术有限公司 | One kind sintering denitrating flue gas desulphurization system and its application |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829499A (en) * | 2010-05-18 | 2010-09-15 | 浙江大学 | SCR (Selective Catalytic Reduction) flue gas denitrification system with structure of optimized ammonia spraying device upstream fluid field |
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2010
- 2010-09-27 CN CN2010102936802A patent/CN102000504A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101829499A (en) * | 2010-05-18 | 2010-09-15 | 浙江大学 | SCR (Selective Catalytic Reduction) flue gas denitrification system with structure of optimized ammonia spraying device upstream fluid field |
Non-Patent Citations (2)
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| 杨忠灿等: "燃煤锅炉的选择性催化还原烟气脱硝技术", 《广东电力》 * |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102961963A (en) * | 2012-11-28 | 2013-03-13 | 南京金美镓业有限公司 | High-concentration nitrogen oxide waste gas catalytic decomposing device |
| CN102961963B (en) * | 2012-11-28 | 2015-02-04 | 南京金美镓业有限公司 | High-concentration nitrogen oxide waste gas catalytic decomposing method |
| CN104020792A (en) * | 2014-05-23 | 2014-09-03 | 国家电网公司 | Automatic control system for flue gas denitration of electric power plant |
| CN104399370A (en) * | 2014-12-03 | 2015-03-11 | 无锡雪浪环境科技股份有限公司 | Lower temperature flue gas SCR (Selective Catalytic Reduction) denitration system and process |
| CN104722203A (en) * | 2015-03-19 | 2015-06-24 | 北京博惠通科技发展有限公司 | SCR denitration control system and SCR denitration control method of heating furnace flue gas |
| CN106422710A (en) * | 2016-11-17 | 2017-02-22 | 上海华之邦科技股份有限公司 | High-capacity denitration apparatus |
| CN107261823A (en) * | 2017-06-30 | 2017-10-20 | 东南大学 | Improve the plate-type denitration catalyst of coal fired power plant SCR system underrun ability |
| CN107983155A (en) * | 2017-12-26 | 2018-05-04 | 中冶京诚工程技术有限公司 | One kind sintering denitrating flue gas desulphurization system and its application |
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Application publication date: 20110406 |