CN103263821A - Nitrogen oxide removing equipment of coal-fired flue gas - Google Patents
Nitrogen oxide removing equipment of coal-fired flue gas Download PDFInfo
- Publication number
- CN103263821A CN103263821A CN2013101931839A CN201310193183A CN103263821A CN 103263821 A CN103263821 A CN 103263821A CN 2013101931839 A CN2013101931839 A CN 2013101931839A CN 201310193183 A CN201310193183 A CN 201310193183A CN 103263821 A CN103263821 A CN 103263821A
- Authority
- CN
- China
- Prior art keywords
- nitric acid
- flue gas
- rfna
- gas
- red fuming
- Prior art date
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- 239000003546 flue gases Substances 0.000 title claims abstract description 51
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound 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[O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910001874 nitric oxide Inorganic materials 0.000 title claims abstract description 19
- 229910052813 nitrogen oxides Inorganic materials 0.000 title claims abstract description 19
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitric oxide Chemical compound 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O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 7
- GRYLNZFGIOXLOG-UHFFFAOYSA-N nitric acid Chemical compound 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- 239000003344 environmental pollutants Substances 0.000 claims description 3
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- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous Oxide Chemical compound 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- 235000011114 ammonium hydroxide Nutrition 0.000 description 4
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- 239000000779 smoke Substances 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound 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NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Abstract
The invention relates to a whole set of nitrogen oxide removing equipment of coal-fired flue gas. The equipment consists of a booster fan, a phase changing tower, nozzles, a nitric acid circulating pool, an acid pump, a turbulence tower and an electrostatic separation tower, wherein the phase changing tower is used for spraying dilute nitric acid, and the nozzles are arranged in the phase changing tower.
Description
Technical field
Coal-fired flue-gas removes the nitrogen oxide complete set of equipments and belongs to atmosphere environmental protection field, purifies a kind of equipment that removes nitrogen oxide that provides to coal-fired flue-gas.
Background technology
It mainly is to adopt ammonia, urea to do the high-temperature catalytic reduction reaction method of reducing agent that at present domestic and international coal-fired flue-gas removes nitrogen oxide.
What popularization was maximum at present is to make reducing agent with ammoniacal liquor, uses the catalytic materials catalyst nox more than 300 ℃ in temperature, generates water and nitrogen.
Basic principle and chemical reaction;
4NH 3+ 6NO catalyst＞300 ℃ → 6H 2O+5N 2
8NH 3+ 6NO 2Catalyst＞300 ℃ → 7H 2O+12N 2
Liquefied ammonia removes the nitrogen oxide technological process:
Flue gas advances heater, advances blender again, and mixed flue gas advances catalytic reactor, and flue gas is crossed the waste heat boiler discharging after the catalysis;
Key is that the secondary pollutant that nitrogen oxide becomes is liquid water and nitrogen, carries unreacted liquid NH secretly 3Constitute the ammonia spirit droplet and be suspended in the vaporific flue gas of discharging, constitute 2 pollutions.
A large amount of ammoniacal liquor that consume cause that to remove nitrogen oxide expensive.
It is high that the catalytic process that ammoniacal liquor removes nitrogen oxide need surpass 300 ℃ of power consumptions, cause complex process, improved cost, invest 6,000 ten thousand the coal-fired flue-gas denitrogenation of 300KWM unit, expend reducing agent ammoniacal liquor in a large number, improved operating cost.
The basic process of this patent, feature;
Phase I;
Discharged flue gas sprays through rare nitric acid behind the flue-gas dust-removing and desulfurization, and absorbing NOx becomes the red fuming nitric acid (RFNA) that relative concentration improves.
Second stage;
Red fuming nitric acid (RFNA) part behind the spray is washed into nitric acid circulatory pool by spray liquid,
The part red fuming nitric acid (RFNA) becomes droplet and is suspended in the flue gas, advances the high-energy physics electric field, droplet on high-energy physics electric field lotus+electronics, by the absorption of the electric field absorption utmost point, from vaporific flue gas, separate, reach the red fuming nitric acid (RFNA) droplet separated near 100%.Thoroughly eliminate the pollution of nitrogen oxide in the coal-fired flue-gas.The saturated normal temperature CO of discharging water white transparency 2Flue gas.
The natural rainy nitrogen oxide process that removes;
Nitrogen oxide in the flue gas sunlight and water smoke in atmosphere drip under the effect, become the conduction droplet of nitric acid.Droplet converges in the vaporific cloud and mist-and gas becomes the covert technical process-purification starting stage of liquid mist.
Cloud and mist after covert and the earth form the high-energy physics electric field, on the nitric acid droplet lotus of conduction+electronics, be adsorbed the utmost point-the earth and attract to drop to the earth, form " nitric acid rain ", pool stream-river at the earth absorption utmost point, flow out the terminal stage of rain belt-electrostatic field-electrostatic separation technology down.
We use the complete set of equipments of " artificial nitric acid rains " to replace finishing the nitrogen oxide process that removes of natural " nitric acid rains " exactly.
The purpose of patent of the present invention;
Remove the nitrogen oxide in the flue gas again and reclaim secondary pollutant-red fuming nitric acid (RFNA) with the flue gas of this complete set of equipments after with dust-removal and desulfurizing.
Summary of the invention
Coal-fired flue-gas removes nitrogen oxide complete set of equipments embodiment;
Purification medium; Flue gas after dedusting and the desulfurization.
Technological process;
Flue gas is crossed the covert tower (2) that blower fan (1) advances spray by → direction, and by the rare nitric acid of nozzle (3) circulated sprinkling, rare nitric acid absorbing NOx finally becomes red fuming nitric acid (RFNA) in tower, and flue gas cool-down becomes vaporific flue gas near normal temperature,
The part red fuming nitric acid (RFNA) is flushed to bottom nitric acid circulatory pool (4) by spray liquid, and red fuming nitric acid (RFNA) discharges by acid-exhausting valve (5) after reaching commodity concentration, reclaims and sells.
The remainder red fuming nitric acid (RFNA) adds water by water intaking valve (6), becomes rare nitric acid, again by sour pump (7) recirculation spray.
The part red fuming nitric acid (RFNA) becomes flue gas that droplet flowed to be carried into nitric acid circulatory pool (4) upper space secretly and crosses turbulated tube (8) and advance high-energy physics electric field-static device (9), and droplet is adsorbed utmost point absorption, pools stream, vertically flows to nitric acid circulatory pool (4)
Normal temperature CO after the electrostatic separation 2Gas advances atmosphere from static device (9) outlet by → discharging.
Power supply is transformer (10)
Beneficial effect:
Effect; Reach and eliminate nitrogen oxide and thermal pollution.Discharging discharging is colourless, transparent, saturated, the CO of nitrogenfree oxide and nitrogenfree oxide secondary pollutant and thermal pollution 2Gas.
Patent of the present invention is; Covert tower serial connection nitric acid circulatory pool is connected in series that electrostatic separator constitutes again.
Description of drawings
Fig. 1, coal-fired flue-gas remove nitrogen oxide complete set of equipments figure.
The covert tower (2) of blower fan (1), nozzle (3) nitric acid circulatory pool (4), acid-exhausting valve (5), water intaking valve (6), sour pump (7) static device (9), transformer (10), turbulated tube (8),
→ flue gas flow direction
The specific embodiment
Case; Flue gas medium; The patent No.; 201110099028.1 title; Flue-gas dust-removing and desulfurization integral process, dust-removal and desulfurizing efficient be near 100%, the saturated 40-50 of the water white transparency of discharging ℃ flue gas, 2100 cubic metres of flows the time, colourless, transparent, saturated, dustless, no sulphur.The aneroid flue gas.
Technological process;
2100 cubic metres the time colourless, transparent, saturated, dustless, no sulphur.The aneroid flue gas is crossed the covert tower (2) that blower fan (1) advances 1200 millimeters plastics of diameter spray, in tower through 30 cubic metres of nozzle (3) circulated sprinklings the time rare nitric acid,
Flue gas became the vaporific flue gas of normal temperature to flue gas greater than 10 seconds holdup time in covert tower (2).
Rare nitric acid absorbing NOx finally becomes red fuming nitric acid (RFNA), and flue gas cool-down becomes vaporific flue gas near normal temperature.
The part red fuming nitric acid (RFNA) is flushed to bottom nitric acid circulatory pool (4) by spray liquid, and red fuming nitric acid (RFNA) discharges by acid-exhausting valve (5) after reaching commodity concentration, reclaims and sells extra earning.
The remainder red fuming nitric acid (RFNA) adds water by water intaking valve (6), becomes rare nitric acid by sour pump (7) recirculation spray.
The part red fuming nitric acid (RFNA) becomes normal temperature flue gas that droplet flowed and carries the liquid level superjacent air space of pernitric acid circulatory pool (4) secretly and advance turbulated tube (8) and advance high-energy physics electric field-static device (9) again
The red fuming nitric acid (RFNA) droplet is adsorbed utmost point absorption, pools stream, vertically flows to nitric acid circulatory pool (4) recirculation spray.
Normal temperature CO after the electrostatic separation 2Gas just advances atmosphere from static device (9) top exit by → discharging.
Power supply is transformer (10)
Effect; Reach and eliminate nitrogen oxide and thermal pollution.Discharge purer CO 2Gas.
Claims (4)
1. coal-fired flue-gas denitrifying oxide complete set of equipments embodiment;
Purification medium: dedusting and flue gas after desulfurization
Technological process:
Flue gas is crossed the covert tower (2) that blower fan (1) advances spray by → direction, and by the rare nitric acid of nozzle (3) circulated sprinkling, rare nitric acid absorbing NOx finally becomes red fuming nitric acid (RFNA) in tower, and flue gas cool-down is to the vaporific flue gas near normal temperature;
The part red fuming nitric acid (RFNA) is flushed to bottom nitric acid circulatory pool (4) by spray liquid in the vaporific flue gas, and red fuming nitric acid (RFNA) discharges by acid-exhausting valve (5) after reaching commodity concentration, reclaims and sells extra earning;
The remainder red fuming nitric acid (RFNA) adds water by water intaking valve (6), becomes rare nitric acid, by sour pump (7) recirculation spray flue gas;
The part red fuming nitric acid (RFNA) becomes normal temperature flue gas that droplet flowed to be carried into nitric acid circulatory pool (4) upper space secretly and crosses turbulated tube (8) and advance high-energy physics electric field-static device (9), and droplet is adsorbed utmost point absorption, pools stream, vertically flows to nitric acid circulatory pool (4);
Normal temperature CO after the electrostatic separation
2Gas advances atmosphere from static device (9) outlet by → discharging;
Power supply is transformer (10);
Effect; Reach and eliminate nitrogen oxide and thermal pollution; Discharging discharging is colourless, transparent, saturated, the CO of nitrogenfree oxide and nitrogenfree oxide secondary pollutant and thermal pollution
2Gas.
2. according to claim 1, its feature of coal-fired flue-gas denitrifying oxide complete set of equipments: spray column (2) serial connection nitric acid circulatory pool (4) is connected in series turbulated tube (8) again and is connected in series static device (9) again.
3. according to claim 1, its feature of coal-fired flue-gas denitrifying oxide complete set of equipments: the part red fuming nitric acid (RFNA) becomes the flue gas that droplet flowed and carries the into top of nitric acid circulatory pool (4) secretly, crosses turbulated tube (8) and advances high-energy physics electric field-static device (9).
4. according to claim 1, its feature of coal-fired flue-gas denitrifying oxide complete set of equipments: the part red fuming nitric acid (RFNA) is flushed to bottom nitric acid circulatory pool (4) by spray liquid, red fuming nitric acid (RFNA) discharges by acid-exhausting valve (5) after reaching commodity concentration, the remainder red fuming nitric acid (RFNA) adds water by water intaking valve (6), become rare nitric acid, again by circulating pump (7) recirculation spray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101931839A CN103263821A (en) | 2013-05-22 | 2013-05-22 | Nitrogen oxide removing equipment of coal-fired flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101931839A CN103263821A (en) | 2013-05-22 | 2013-05-22 | Nitrogen oxide removing equipment of coal-fired flue gas |
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| CN103263821A true CN103263821A (en) | 2013-08-28 |
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| CN2013101931839A CN103263821A (en) | 2013-05-22 | 2013-05-22 | Nitrogen oxide removing equipment of coal-fired flue gas |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5045774A (en) * | 1974-04-01 | 1975-04-24 | ||
| CN101732963A (en) * | 2008-11-14 | 2010-06-16 | 姜桂英 | Multiphase flow smoke purifying process |
| CN102407068A (en) * | 2010-09-25 | 2012-04-11 | 潍坊信誉环境工程有限公司 | Acidic water solution for absorbing NOx and method for purifying NOx-containing waste gas by applying same |
| CN102580431A (en) * | 2011-04-20 | 2012-07-18 | 庄建中 | Dedusting and dusulfuration integration process for smoke |
-
2013
- 2013-05-22 CN CN2013101931839A patent/CN103263821A/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5045774A (en) * | 1974-04-01 | 1975-04-24 | ||
| CN101732963A (en) * | 2008-11-14 | 2010-06-16 | 姜桂英 | Multiphase flow smoke purifying process |
| CN102407068A (en) * | 2010-09-25 | 2012-04-11 | 潍坊信誉环境工程有限公司 | Acidic water solution for absorbing NOx and method for purifying NOx-containing waste gas by applying same |
| CN102580431A (en) * | 2011-04-20 | 2012-07-18 | 庄建中 | Dedusting and dusulfuration integration process for smoke |
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Application publication date: 20130828 |