CN104791817A - Smoke denitration and desulfuration device for boiler flue - Google Patents
Smoke denitration and desulfuration device for boiler flue Download PDFInfo
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- CN104791817A CN104791817A CN201510147516.3A CN201510147516A CN104791817A CN 104791817 A CN104791817 A CN 104791817A CN 201510147516 A CN201510147516 A CN 201510147516A CN 104791817 A CN104791817 A CN 104791817A
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- desulfurizer
- flue gas
- gas
- boiler
- flue
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Abstract
The invention relates to a smoke denitration and desulfuration device for a boiler flue. The smoke denitration and desulfuration device for the boiler flue comprises a boiler body which is connected with the boiler flue. A cyclone dust remover, a denitration reactor, a coal economizer, an air pre-heater, an electric dust remover, a desulfuration device, an induced draft fan and a chimney are sequentially arranged in the smoke processing direction. A dry ash bin is connected with the lower portion of the cyclone dust remover through a pipeline, and is used for storing dry ash with big particles. The denitration reactor is used for removing nitrogen oxide in the smoke. The coal economizer is arranged below the denitration reactor. The air pre-heater is used for recycling heat after the nitrogen oxide removing is carried out on the smoke. The electric dust remover is used for removing gas in the smoke after the heat removing is carried out on the smoke. The nitrogen oxide in the gas which is conducted to the dust removing is further removed by the desulfuration device. The purified gas passes through the induced draft fan and is discharged to the outside through the chimney after the denitration and the desulfuration are carried out.
Description
Technical field
The present invention relates to pulverized-coal fired boiler technical field, be specifically related to a kind of denitrating flue gas desulfurizer of boiler flue.
Background technology
Environmental protection relates to prevention to phenomenons such as waste gas, waste water, dust, noise, light pollution and improvement.Nitrogen oxide (based on NO) and sulfur dioxide are at present by the atmosphere pollution of global extensive concern, have a large amount of nitrogen oxide and sulfur dioxide to enter air every year, cause serious environmental pollution and have very large harm to human body.
The units such as steam power plant all use large-scale boiler, boiler can produce a large amount of flue gases in running, the toxic compounds containing nitre sulfur-bearing is there is in boiler smoke, if these toxic compounds are directly discharged in air, severe contamination can be caused, affect atmospheric environment, therefore the process of boiler smoke is extremely important.The flue gas denitrification system of general boiler, comprise boiler body, economizer and Benitration reactor, the back-end ductwork that economizer is arranged on boiler body removes, but because on boiler body, economizer heat exchange area is large, heat exchange is abundant, make the flue-gas temperature out of the economizer on boiler body on the low side, the requirement of denitration can not be met, denitration reaction system can not normally be run.
At present, about removing the technique comparative maturity of sulfur dioxide in flue gas and nitrogen oxide, carry out large-scale industrial application already, but most technique is all only useful for one-component, such as out of stock or for desulfurization.Nitrogen oxides in effluent and sulfur dioxide often exist simultaneously, if utilize these equipment that can only process Single Pollution thing to remove respectively nitrogen oxide and sulfur dioxide, have that floor space is large, high in cost of production problem.Therefore, the technology of research and development simultaneous SO_2 and NO removal further, the control for atmosphere pollution is significant.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the invention provides a kind of denitrating flue gas desulfurizer of boiler flue, its structure is simple, and efficiency of construction is high, and effectively can ensure the high efficiency of denitration desulfurization, improves environmental quality.
The present invention is the denitrating flue gas desulfurizer of a kind of boiler flue realized with following technical scheme, comprise the boiler furnace linked together by flue, on flue gas direct of travel, be disposed with cyclone dust collectors, for removing the Benitration reactor of the nitrogen oxide in flue gas, be positioned at the economizer below Benitration reactor, gas by become desulfurization after desulfurizer and out of stock after Purge gas, the chimney that described Purge gas is externally discharged by air-introduced machine.
Preferably, a dry ash storehouse is connected by pipeline below described cyclone dust collectors.
Preferably, the air preheater of the heat in the gas after reclaiming removing nitrogen oxide is also comprised.
Preferably, the gas through described air preheater enters electric cleaner, and enters desulfurizer by described electric cleaner, and described desulfurizer is for the oxysulfide in gas after further removing dedusting.
Preferably, the desulfurizing agent used in described desulfurizer contains ammoniacal liquor.
Preferably, the mass fraction of described ammoniacal liquor in described desulfurizing agent is 10% ~ 16%.
Preferably, the temperature of the denitration reaction in described Benitration reactor is 15 ~ 55 DEG C, and pH value is 6.5 ~ 8.5, and in described desulfurizer, the temperature of desulphurization reaction is 15 ~ 55 DEG C, and pH value is 5.5 ~ 7.5.
Preferably, the ammonia sprayed into mixes with flue gas by described Benitration reactor, and fully after mixing, reducing agent reacts with the NOx in flue gas under the effect of catalyst, generates nitrogen and water.
Preferably, described catalyst is honeycomb catalyst, and aperture is 2-6mm, and the active component of described honeycomb catalyst is transition metal oxide.
The invention has the beneficial effects as follows:
The invention provides a kind of device of denitrating flue gas desulfurization of boiler flue, the present invention first processes oarse-grained dry ash by arranging cyclone dust collectors, arranges economizer further below Benitration reactor, thus improves flue-gas temperature; Be provided with air preheater in Benitration reactor exit by flue, improve the thermal efficiency of whole device.
Accompanying drawing explanation
Fig. 1 is a kind of operating diagram of device of denitrating flue gas desulfurization of boiler flue.
Wherein, 1-boiler furnace, 2-cyclone dust collectors, 3-dry ash storehouse, 4-flue, 5-Benitration reactor, 6-economizer, 7-air preheater, 8-electric cleaner, 9-desulfurizer, 10-air-introduced machine, 11-chimney.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
In one embodiment, as shown in Figure 1, a kind of denitrating flue gas desulfurizer of boiler flue, comprise the boiler furnace 1 linked together by flue 4, on flue gas direct of travel, be disposed with cyclone dust collectors 2, a dry ash storehouse 3 is connected by pipeline below cyclone dust collectors 2, for depositing bulky grain dry ash, with the Benitration reactor 5 passed through for removing the nitrogen oxide in flue gas, be positioned at the economizer 6 below Benitration reactor 5, reclaim the air preheater 7 of the heat in the gas after removing nitrogen oxide, the electric cleaner 8 of the gas in the gas after removing heat recovery, the oxysulfide after dedusting in gas is removed further by desulfurizer 9, and by chimney 11 that denitrating flue gas desulfurization after-purification gas is externally discharged by air-introduced machine 10.
The desulfurizing agent used in described desulfurizer contains ammoniacal liquor, and the mass fraction of described ammoniacal liquor in described desulfurizing agent is 10%.
The temperature of the denitration reaction in described Benitration reactor is 15 DEG C, and pH value is 6.5, and in described desulfurizer, the temperature of desulphurization reaction is 15 DEG C, and pH value is 5.5.
The ammonia sprayed into mixes with flue gas by described Benitration reactor, and fully after mixing, reducing agent reacts with the NOx in flue gas under the effect of catalyst, generates nitrogen and water.
Described catalyst is honeycomb catalyst, and aperture is 2mm, and the active component of described honeycomb catalyst is transition metal oxide.
Another embodiment, as shown in the figure, a kind of denitrating flue gas desulfurizer of boiler flue, comprise the boiler furnace 1 linked together by flue 4, on flue gas direct of travel, be disposed with cyclone dust collectors 2, a dry ash storehouse 3 is connected by pipeline below cyclone dust collectors 2, for depositing bulky grain dry ash, with the Benitration reactor 5 passed through for removing the nitrogen oxide in flue gas, be positioned at the economizer 6 below Benitration reactor 5, reclaim the air preheater 7 of the heat in the gas after removing nitrogen oxide, the electric cleaner 8 of the gas in the gas after removing heat recovery, the oxysulfide after dedusting in gas is removed further by desulfurizer 9, and by chimney 11 that denitrating flue gas desulfurization after-purification gas is externally discharged by air-introduced machine 10.
The desulfurizing agent used in described desulfurizer contains ammoniacal liquor, the mass fraction of described ammoniacal liquor in described desulfurizing agent is 16%.
The temperature of the denitration reaction in described Benitration reactor is 55 DEG C, and pH value is 8.5, and in described desulfurizer, the temperature of desulphurization reaction is 55 DEG C, and pH value is 7.5.
The ammonia sprayed into mixes with flue gas by described Benitration reactor, and fully after mixing, reducing agent reacts with the NOx in flue gas under the effect of catalyst, generates nitrogen and water.
Described catalyst is honeycomb catalyst, and aperture is 6mm, and the active component of described honeycomb catalyst is transition metal oxide.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (9)
1. the denitrating flue gas desulfurizer of a boiler flue, it is characterized in that: comprise the boiler furnace (1) linked together by flue (4), on flue gas direct of travel, be disposed with cyclone dust collectors (2), for removing the Benitration reactor (5) of the nitrogen oxide in flue gas, be positioned at the economizer (6) of Benitration reactor (5) below, gas by become desulfurization after desulfurizer (9) and out of stock after Purge gas, the chimney (11) that described Purge gas is externally discharged by air-introduced machine (10).
2. the denitrating flue gas desulfurizer of a kind of boiler flue according to claim 1, is characterized in that: described cyclone dust collectors (2) below connects a dry ash storehouse (3) by pipeline.
3. the denitrating flue gas desulfurizer of a kind of boiler flue according to claim 1 and 2, is characterized in that: the air preheater (7) also comprising the heat in the gas after reclaiming removing nitrogen oxide.
4. the denitrating flue gas desulfurizer of a kind of boiler flue according to claim 3, it is characterized in that: the gas through described air preheater enters electric cleaner (8), and entering desulfurizer (9) by described electric cleaner (8), described desulfurizer (9) is for removing the oxysulfide after dedusting in gas further.
5. the denitrating flue gas desulfurizer of a kind of boiler flue according to claim 4, is characterized in that: the desulfurizing agent used in described desulfurizer (9) contains ammoniacal liquor.
6. the denitrating flue gas desulfurizer of a kind of boiler flue according to claim 5, is characterized in that: the mass fraction of described ammoniacal liquor in described desulfurizing agent is 10% ~ 16%.
7. according to the denitrating flue gas desulfurizer of a kind of boiler flue in claim 3-6 described in any one, it is characterized in that: the temperature of the denitration reaction in described Benitration reactor (5) is 15 ~ 55 DEG C, pH value is 6.5 ~ 8.5, in described desulfurizer (9), the temperature of desulphurization reaction is 15 ~ 55 DEG C, and pH value is 5.5 ~ 7.5.
8. the denitrating flue gas desulfurizer of a kind of boiler flue according to claim 7, it is characterized in that: the ammonia sprayed into mixes with flue gas by described Benitration reactor (5), after abundant mixing, reducing agent reacts with the NOx in flue gas under the effect of catalyst, generates nitrogen and water.
9. the denitrating flue gas desulfurizer of a kind of boiler flue according to claim 8, is characterized in that: described catalyst is honeycomb catalyst, and aperture is 2-6mm, and the active component of described honeycomb catalyst is transition metal oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510147516.3A CN104791817A (en) | 2015-03-31 | 2015-03-31 | Smoke denitration and desulfuration device for boiler flue |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510147516.3A CN104791817A (en) | 2015-03-31 | 2015-03-31 | Smoke denitration and desulfuration device for boiler flue |
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| CN104791817A true CN104791817A (en) | 2015-07-22 |
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| CN201510147516.3A Pending CN104791817A (en) | 2015-03-31 | 2015-03-31 | Smoke denitration and desulfuration device for boiler flue |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257350A (en) * | 2015-09-21 | 2016-01-20 | 华北电力大学 | Low-calorific-value coal steam-hot air combined cycle power generation system |
| CN106880996A (en) * | 2017-03-28 | 2017-06-23 | 中国科学院广州能源研究所 | The method of dust and discharged nitrous oxides and the device of the method is realized in a kind of control tail gas |
| CN109999630A (en) * | 2019-05-08 | 2019-07-12 | 武汉立为工程技术有限公司 | A kind of SNCR denitration system |
| CN112619393A (en) * | 2020-11-17 | 2021-04-09 | 天津浩创节能环保设备有限公司 | Boiler flue gas desulfurization and denitrification system |
| CN114307574A (en) * | 2021-12-17 | 2022-04-12 | 武汉旭清工程技术有限公司 | Flue gas purification system applied to biomass power plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102393023A (en) * | 2011-10-20 | 2012-03-28 | 南京龙源环保有限公司 | Exhaust gas dedusting, denitration and desulfuration method for thermal power plant |
| CN103982904A (en) * | 2014-04-28 | 2014-08-13 | 浙江巨化热电有限公司 | Novel comprehensive flue gas treatment system and method |
| CN103994456A (en) * | 2014-05-06 | 2014-08-20 | 浙江天地环保工程有限公司 | Integrated system for efficiently and synergistically removing multiple pollutants |
-
2015
- 2015-03-31 CN CN201510147516.3A patent/CN104791817A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393023A (en) * | 2011-10-20 | 2012-03-28 | 南京龙源环保有限公司 | Exhaust gas dedusting, denitration and desulfuration method for thermal power plant |
| CN103982904A (en) * | 2014-04-28 | 2014-08-13 | 浙江巨化热电有限公司 | Novel comprehensive flue gas treatment system and method |
| CN103994456A (en) * | 2014-05-06 | 2014-08-20 | 浙江天地环保工程有限公司 | Integrated system for efficiently and synergistically removing multiple pollutants |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257350A (en) * | 2015-09-21 | 2016-01-20 | 华北电力大学 | Low-calorific-value coal steam-hot air combined cycle power generation system |
| CN106880996A (en) * | 2017-03-28 | 2017-06-23 | 中国科学院广州能源研究所 | The method of dust and discharged nitrous oxides and the device of the method is realized in a kind of control tail gas |
| CN109999630A (en) * | 2019-05-08 | 2019-07-12 | 武汉立为工程技术有限公司 | A kind of SNCR denitration system |
| CN112619393A (en) * | 2020-11-17 | 2021-04-09 | 天津浩创节能环保设备有限公司 | Boiler flue gas desulfurization and denitrification system |
| CN114307574A (en) * | 2021-12-17 | 2022-04-12 | 武汉旭清工程技术有限公司 | Flue gas purification system applied to biomass power plant |
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Application publication date: 20150722 |