CN211706286U - System for deeply and synergistically treating smoke pollutants of coal-fired boiler - Google Patents
System for deeply and synergistically treating smoke pollutants of coal-fired boiler Download PDFInfo
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- CN211706286U CN211706286U CN201921726704.1U CN201921726704U CN211706286U CN 211706286 U CN211706286 U CN 211706286U CN 201921726704 U CN201921726704 U CN 201921726704U CN 211706286 U CN211706286 U CN 211706286U
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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
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- 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 utility model discloses a system for degree of depth is in coordination with administering coal fired boiler flue gas pollutant belongs to industrial waste gas purification environmental protection and energy field, including the boiler, the chimney, the economizer, SCR denitrification facility, the air preheater, dry-type dust collector, wet flue gas desulphurization unit, ultrasonic atomization injection apparatus and wet-type electrostatic precipitator, through leading oxidation flue gas pollutant of sodium hypochlorite solution and the lotus electric desorption flue gas pollutant of wet-type electrostatic precipitator combine together, realize that flue gas pollutant's degree of depth is in coordination with the ultralow emission, thereby control conventional flue gas pollutant desorption device at reliable and stable economic running state, thereby avoid reforming transform on a large scale, and reduce running cost by a wide margin. Compared with the prior art, the utility model has the advantages of the system is simple, the investment is low with the working costs, the reliability promotes by a wide margin, has extensive application prospect.
Description
Technical Field
The utility model belongs to industrial waste gas purifies environmental protection and energy field, in particular to system of coal fired boiler flue gas pollutant is administered in coordination to degree of depth.
Background
In recent years, coal-fired power plants are advancing the work of ultra-low emission modification on a large scale and gradually moving to industrial boilers. However, the output of the existing environment-friendly device reaches the limit, and further efficiency improvement is required, which usually requires synchronous modification of desulfurization, denitrification and dust removal, thus causing huge waste of resources and energy. If the deep cooperative treatment of the smoke pollutants is realized by implementing single transformation on the basis that the existing environment-friendly device is not transformed, the energy-saving and emission-reducing benefits of enterprises are greatly improved.
The technology related to the utility model, for example, the patent application CN106621680A, 2017, 5, month and 10, discloses a flue gas deep dust removal method and system after wet desulphurization, which adopts steam to remove PM in flue gas after desulphurization2.5The fine particles are condensed and enlarged, and then are deeply removed through a wet electric dust collector. However, the technology can only improve the removal efficiency of fine particles, and the SO in the coal-fired flue gas2With NOxDeep cooperative removal cannot be achieved.
For another example, patent publication No. CN103611419B published as 2016, 3 and 30 months2And NOxMethod for oxidizing SO in flue gas by combination of corona discharge and liquid phase oxidation2And then the NO enters a spraying absorption device to realize the purification of the flue gas. But for SO in conventional coal-fired flue gas2With NOxThe higher situation, the higher energy consumption and material consumption of this utility model technology, cause the restriction to its industrial application.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems of high engineering investment, high operating cost and large resource and energy consumption caused by the ultralow emission of the flue gas of the current coal-fired boiler, and provides a system for deeply and synergistically treating the flue gas pollutants of the coal-fired boiler.
The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a system for degree of depth is administered coal fired boiler flue gas pollutant in coordination, includes boiler and chimney, its characterized in that: still include economizer, SCR denitrification facility, air preheater, dry-type dust collector, wet flue gas desulfurization device, ultrasonic atomization injection apparatus and wet-type electrostatic precipitator, boiler, economizer, SCR denitrification facility, air preheater, dry-type dust collector, wet flue gas desulfurization device and chimney communicate in proper order, ultrasonic atomization injection apparatus sets up in the flue between wet flue gas desulfurization device and wet-type electrostatic precipitator.
Furthermore, the ultrasonic atomization spraying device is filled with a sodium hypochlorite solution.
Further, the pH value of the sodium hypochlorite solution is adjusted to be within the range of 5.5-6.5 through hydrochloric acid.
Compared with the prior art, the utility model, have following advantage and effect: through above-mentioned system, leading conventional SCR denitrification facility, dry-type dust collector, wet flue gas desulphurization unit can operate and exert oneself reliable and stable economic state in the system, absorb the oxidation through sodium hypochlorite solution at last to and wet-type electric dust collector's degree of depth is desorption in coordination, realizes the minimum emission of flue gas. Compared with the prior art, the utility model has the advantages of the system is simple, the investment is low with the working costs, the reliability promotes by a wide margin, has extensive application prospect.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure: the system comprises a boiler 1, an economizer 2, an SCR denitration device 3, an air preheater 4, a dry dust removal device 5, a wet desulphurization device 6, an ultrasonic atomization injection device 7, a wet electric dust removal device 8 and a chimney 9.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Referring to fig. 1, this embodiment provides a degree of depth is system of administering coal fired boiler flue gas pollutant in coordination, including boiler 1 and chimney 9, still include economizer 2, SCR denitrification facility 3, air preheater 4, dry-type dust collector 5, wet flue gas desulfurization device 6, ultrasonic atomization injection apparatus 7 and wet-type electrostatic precipitator 8, boiler 1, economizer 2, SCR denitrification facility 3, air preheater 4, dry-type dust collector 5, wet flue gas desulfurization device 6, wet-type electrostatic precipitator 8 and chimney 9 communicate in proper order, ultrasonic atomization injection apparatus 7 sets up in the flue between wet flue gas desulfurization device 6 and wet-type electrostatic precipitator 8, sodium hypochlorite solution is contained in ultrasonic atomization injection apparatus 7.
The working method comprises the following steps: after the flue gas comes out of the boiler 1, the flue gas sequentially passes through an economizer 2, an SCR denitration device 3, an air preheater 4, a dry dust removal device 5 and a wet desulphurization device 6, then enters a wet electric precipitation device 8 for deep synergistic removal of pollutants, and finally enters a chimney 9 for emission; outlet NO of SCR denitration device 3xThe concentration is controlled at 100mg/m3The concentration of the smoke dust at the outlet of the dry type dust removal device 5 is controlled within 50mg/m3Outlet SO of inner and wet desulfurizing device 62The concentration and the smoke concentration are respectively controlled at 100mg/m3Interior sum of 20mg/m3The content of the compound is less than the content of the compound; is connected with a wet desulphurization device 6 and a wet electric dust removal deviceAn ultrasonic atomization spraying device 7 is arranged in the flue between 8, and sodium hypochlorite solution is atomized and sprayed into the flue, SO that SO in the flue gas2And NOxAbsorbed and respectively oxidized into sulfate and nitrate, and further removed in the subsequent wet electric dust collector 8 in a deep and cooperative manner, and finally the outlet SO of the wet electric dust collector 8 is realized2The concentration is less than 35mg/m3NOx concentration less than 50mg/m3The smoke concentration is less than 5mg/m3Ultra-low emission.
In the embodiment, the temperature of the flue gas at the sodium hypochlorite solution injection point is controlled within the range of 45-55 ℃, the pH of the sodium hypochlorite solution is adjusted within the range of 5.5-6.5 by hydrochloric acid, the flow time of the flue gas from the sodium hypochlorite solution injection point to the inlet of the wet electric dust removal device 8 is controlled within the range of 0.8-1.2 s, and the sodium hypochlorite injected into the flue gas and the SO in the flue gas2With NOxThe molar ratio of the sum is controlled within the range of 0.5 to 2.0.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should not be construed as being limited to the scope of the present invention, and any modifications and alterations made by those skilled in the art without departing from the spirit and scope of the present invention should fall within the scope of the present invention.
Claims (3)
1. The utility model provides a system for degree of depth is administered coal fired boiler flue gas pollutant in coordination, includes boiler (1) and chimney (9), its characterized in that: still include economizer (2), SCR denitrification facility (3), air preheater (4), dry dust collector (5), wet flue gas desulfurization device (6), ultrasonic atomization injection apparatus (7) and wet-type electrostatic precipitator (8), boiler (1), economizer (2), SCR denitrification facility (3), air preheater (4), dry dust collector (5), wet flue gas desulfurization device (6), wet-type electrostatic precipitator (8) and chimney (9) communicate in proper order, ultrasonic atomization injection apparatus (7) set up in the flue between wet flue gas desulfurization device (6) and wet-type electrostatic precipitator (8).
2. The system for deeply and synergistically treating coal-fired boiler flue gas pollutants according to claim 1, wherein: the ultrasonic atomization spraying device (7) is filled with sodium hypochlorite solution.
3. The system for deeply and synergistically treating coal-fired boiler flue gas pollutants according to claim 2, wherein: the pH value of the sodium hypochlorite solution is regulated to be within the range of 5.5-6.5 through hydrochloric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921726704.1U CN211706286U (en) | 2019-10-15 | 2019-10-15 | System for deeply and synergistically treating smoke pollutants of coal-fired boiler |
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| CN201921726704.1U CN211706286U (en) | 2019-10-15 | 2019-10-15 | System for deeply and synergistically treating smoke pollutants of coal-fired boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113251411A (en) * | 2021-05-31 | 2021-08-13 | 国能神东煤炭集团有限责任公司 | Multi-pollutant cooperative control system and method for coal-fired industrial boiler |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113251411A (en) * | 2021-05-31 | 2021-08-13 | 国能神东煤炭集团有限责任公司 | Multi-pollutant cooperative control system and method for coal-fired industrial boiler |
| CN113251411B (en) * | 2021-05-31 | 2023-01-03 | 国能神东煤炭集团有限责任公司 | Multi-pollutant cooperative control system and method for coal-fired industrial boiler |
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