CN214916161U - Regeneration system for flue gas multi-pollutant collaborative removal - Google Patents
Regeneration system for flue gas multi-pollutant collaborative removal Download PDFInfo
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- CN214916161U CN214916161U CN202120637478.0U CN202120637478U CN214916161U CN 214916161 U CN214916161 U CN 214916161U CN 202120637478 U CN202120637478 U CN 202120637478U CN 214916161 U CN214916161 U CN 214916161U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a regeneration system of flue gas multi-pollutant desorption in coordination, the boiler flue gas is behind one-level economizer, be connected to the flue gas entry in air heater main area all the way, be connected to the flue gas entry in regeneration area all the way, cold air is connected to main area air inlet through main air blower all the way, another way is connected to the air inlet of cooling zone through regeneration air blower, the air outlet of cooling zone is connected to the air inlet of preheating zone, the air outlet of preheating zone is connected to regeneration area air inlet, the regeneration area air outlet of air heater is connected to the air inlet of heating zone, the air outlet pipeline of heating zone removes the boiler with the hot-air outlet pipeline of main area after converging. The utility model discloses utilize boiler afterbody flue gas to come heated air to carry out the regeneration treatment of adsorbent, heat step recycle, utilize fully, reduced the running cost, and need not to add the blowback system, reduced the device and first invested in.
Description
Technical Field
The utility model belongs to the technical field of the purification is administered to the flue gas pollutant, concretely relates to regeneration system of many pollutants of flue gas desorption in coordination.
Background
The desorption tower and the regeneration tower are core equipment of an active coke dry method flue gas integrated purification technology, the fixed bed desorption tower and the moving bed desorption tower are mostly applied in industry, at present, the intermittent operation mode of the fixed bed desorption tower cannot adapt to the condition of processing large flue gas volume, so that the moving bed desorption tower is widely applied, but the regeneration desorption of an adsorbent in the application of the existing moving bed technology has higher requirements than the desorption adsorption of a front-end process, the more thorough the regeneration desorption, the larger the loading capacity of the adsorbent, the smaller the moving circulation volume and the lower the abrasion loss.
In the existing flue gas active coke combined desulfurization and denitrification process, an active coke regeneration system mostly utilizes an electric heater or a hot blast stove, and consumes electric energy or coal gas as a heat source, so that the equipment investment is increased, the system is complicated, and the running cost of the whole set of equipment is increased.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects existing in the prior art, the utility model provides a regeneration system for removing multiple pollutants in flue gas in a synergic manner.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a regeneration system for cooperatively removing multiple pollutants in flue gas comprises an air preheater, wherein the air preheater comprises a main area and a regeneration area, flue gas inlets of the main area and the regeneration area are connected to a flue outlet of a boiler, a first-level economizer is arranged in a flue of the boiler, the flue gas outlets of the main area and the regeneration area are connected to a dust removal system after being converged, the regeneration system further comprises a regeneration tower, a main air blower and a regeneration air blower, the regeneration tower comprises a preheating section, a heating section and a cooling section which are sequentially arranged from top to bottom, an outlet of the main air blower is connected to an air inlet of the main area, inlets of the main air blower and the regeneration air blower are communicated to the atmosphere, an outlet of the regeneration air blower is connected to an air inlet of the cooling section, and an air outlet of the cooling section is connected to an air inlet of the preheating section, an air outlet of the preheating section is connected to an air inlet of the regeneration area, an air outlet of the regeneration area is connected to an air inlet of the heating section, and an air outlet of the heating section and a hot air outlet of the main area are converged and then enter a boiler combustion area to serve as an oxygen source.
Furthermore, the regeneration tower adopts an indirect heat exchange mode, the adsorbent is positioned in a tube pass of the regeneration tower, and the corresponding heat exchange air is positioned in a shell pass of the regeneration tower.
Furthermore, the preheating section, the heating section and the cooling section are of a split structure, a first cavity used for communicating the tube side of the preheating section with the tube side of the heating section is arranged between the preheating section and the heating section, and a second cavity used for communicating the tube side of the heating section with the tube side of the cooling section is arranged between the heating section and the cooling section.
Furthermore, nitrogen interfaces are arranged on the side walls of the first cavity and the second cavity.
Further, a main flue damper is disposed between the main zone and the flue outlet of the boiler.
Furthermore, a regeneration flue gas regulating valve is arranged between the regeneration area and a flue outlet of the boiler.
Further, the regeneration air blower is provided with a first inverter for controlling the flow rate of the regeneration air.
Further, the main air blower is provided with a second frequency converter for controlling the main air flow.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model is suitable for a processing of smoke pollutants such as coal fired power plant, the flue gas that comes out through the one-level economizer in the boiler divide into two the tunnel, the main regional heating main road air that gets into air heater all the way, the regeneration zone that gets into air heater's regeneration zone all the way in addition heats the air that the adsorbent regenerates, regeneration air temperature after the intensification can be more than 350 ℃, be in the ideal regeneration temperature interval of adsorbent, need not additionally to set up equipment such as electric heater or hot-blast furnace, thereby the use consumption of factory power consumption or coal gas has been reduced, and the relative flue gas clean degree of air heating is high, need not to set up compressed air blowback system, whole system is simple, and the running cost is low.
Furthermore, the air preheater is divided into two areas, the main area is used for heating cold air from the main path, the regeneration area is used for heating air for adsorbent regeneration, and flue gas from the two areas is mixed into one path and then enters the dust removal system, so that the purpose of full utilization is achieved.
Furthermore, different sections of the regeneration tower are not directly communicated but disconnected, and are provided with nitrogen interfaces, and nitrogen is introduced into the adsorbent bed layer for protection when necessary, so that accidents caused by bed layer temperature runaway due to oxygen leakage are avoided.
Furthermore, the air flow rate for regenerating the adsorbent is controlled by a frequency converter matched with a regeneration air blower, and the temperature of the air for regeneration is adjusted by matching a regeneration flue gas adjusting valve and a main flue damper, so that the air flow rate and the temperature for regeneration can be conveniently adjusted.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation.
Fig. 1 is a schematic view of a regeneration system for removing multiple pollutants in flue gas in a synergistic manner.
Wherein, 1, a boiler; 2. a first-stage economizer; 3. an air preheater; 4. a regeneration tower; 5. a main flue flapper valve; 6. a preheating section; 7. a primary air blower; 8. a regeneration air blower; 9. a regenerated flue gas regulating valve; 10. a heating section; 11. and a cooling section.
Detailed Description
The following describes embodiments of the present invention in further detail:
as shown in fig. 1, a regeneration system for cooperatively removing multiple pollutants in flue gas comprises a boiler 1, a primary economizer 2, an air preheater 3, a regeneration tower 4, a main flue damper 5, a preheating section 6, a main air blower 7, a regeneration air blower 8, a regeneration flue gas regulating valve 9, a heating section 10 and a cooling section 11.
The flue gas that boiler 1 furnace produced is divided into two the tunnel after the cooling of one-level economizer 2, and one way is connected to the main area flue gas entry of air heater 3 through main flue flapper valve 5, and one way is connected to the regeneration area flue gas entry of air heater 3 through regeneration flue gas governing valve 9, and two strands of flue gas after the cooling are gathered removes the dust.
The air preheater 3 is divided into two zones, the main zone is used for heating cold air from the main path, and the regeneration zone is used for heating air for adsorbent regeneration.
The cold air pipeline from the atmospheric environment is divided into two branches, one branch is connected to a main area air inlet of the air preheater 3 after being boosted by the main air blower 7, the other branch is connected to an air inlet of the cooling section 11 through the regeneration air blower 8, an air outlet of the cooling section 11 is connected to an air inlet of the preheating section 6, an air outlet of the preheating section 6 is connected to a regeneration area air inlet of the air preheater 3, a regeneration area air outlet of the air preheater 3 is connected to an air inlet of the heating section 10, and an air outlet pipeline of the heating section 10 and a hot air outlet pipeline of the main area of the air preheater 3 are gathered and then go to the boiler.
The regeneration tower 4 adopts an indirect heat exchange mode, the adsorbent moves on a tube pass at a certain flow velocity, heat exchange air flows on a shell pass, the interior among the preheating section 6, the heating section 10 and the cooling section 11 is disconnected, and a protective nitrogen interface is arranged.
The air flow for regenerating the adsorbent is controlled by a frequency converter matched with a regeneration air blower 8, and the temperature of the air for regenerating is adjusted by matching a regeneration flue gas adjusting valve 9 and a main flue damper 5.
When in use, the flue gas generated by the hearth of the boiler 1 is cooled by the primary economizer 2 and then divided into two paths, one path enters the main area of the air preheater 3 to heat the main path air, the other path enters the regeneration area of the air preheater 3 to heat the air for adsorbent regeneration, the cold air from the atmospheric environment is divided into two branches, one path enters the main area of the air preheater 3 to recover the heat of the main path flue gas after being boosted by the main air blower 7, the other path communicates with the air inlet of the regeneration tower cooling section 11 through the regeneration air blower 8, the air outlet of the regeneration tower cooling section 11 communicates with the air inlet of the regeneration tower preheating section 6, the air outlet of the regeneration tower preheating section 6 communicates with the regeneration area air inlet of the air preheater 3, the regeneration area air outlet of the air preheater 3 communicates with the air inlet of the regeneration tower heating section 10, and the air outlet pipeline of the regeneration tower heating section 10 and the hot air outlet pipeline of the main area of the air preheater 3 are gathered together And then to the boiler.
The utility model discloses utilize boiler afterbody flue gas to come the heated air to carry out the regeneration treatment of adsorbent, heat step recycle, utilize fully, need not additionally to set up equipment such as electric heater or hot-blast furnace, system simple process, and need not to consume factory power or coal gas, reduced the running cost, owing to adopt the air as heating medium, the clean degree height need not add the blowback system, reduced the device and just invested in simultaneously.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The regeneration system for cooperatively removing the multiple pollutants in the flue gas is characterized by comprising an air preheater (3), wherein the air preheater (3) comprises a main area and a regeneration area, flue gas inlets of the main area and the regeneration area are connected to a flue gas outlet of a boiler (1), a one-level coal economizer (2) is arranged in a flue of the boiler (1), the flue gas outlets of the main area and the regeneration area are connected to a dust removal system after being converged, the regeneration system further comprises a regeneration tower (4), a main air blower (7) and a regeneration air blower (8), the regeneration tower (4) comprises a preheating section (6), a heating section (10) and a cooling section (11) which are sequentially arranged from top to bottom, an outlet of the main air blower (7) is connected to an air inlet of the main area, and inlets of the main air blower (7) and the regeneration air blower (8) are communicated to the atmospheric environment, an outlet of the regeneration air blower (8) is connected to an air inlet of the cooling section (11), an air outlet of the cooling section (11) is connected to an air inlet of the preheating section (6), an air outlet of the preheating section (6) is connected to an air inlet of the regeneration area, an air outlet of the regeneration area is connected to an air inlet of the heating section (10), and an air outlet of the heating section (10) and a hot air outlet of the main area are converged and then enter a boiler combustion area to serve as an oxygen source.
2. The regeneration system for the synergistic removal of multiple pollutants in flue gas according to claim 1, wherein the regeneration tower (4) adopts an indirect heat exchange mode, the adsorbent is located in the tube side of the regeneration tower (4), and the corresponding heat exchange air is located in the shell side of the regeneration tower (4).
3. The regeneration system for the synergistic removal of multiple pollutants in flue gas according to claim 1, wherein the preheating section (6), the heating section (10) and the cooling section (11) are of a split structure, a first cavity for communicating the tube side of the preheating section with the tube side of the heating section is arranged between the preheating section (6) and the heating section (10), and a second cavity for communicating the tube side of the heating section with the tube side of the cooling section is arranged between the heating section (10) and the cooling section (11).
4. The regeneration system for the synergistic removal of multiple pollutants in flue gas according to claim 3, wherein the side walls of the first and second cavities are provided with nitrogen interfaces.
5. The regeneration system for the synergistic removal of multiple pollutants in flue gas according to claim 1, characterized in that a main flue damper (5) is arranged between the main area and the flue outlet of the boiler (1).
6. The regeneration system for the synergistic removal of multiple pollutants in flue gas according to claim 1, characterized in that a regeneration flue gas regulating valve (9) is arranged between the regeneration zone and the flue outlet of the boiler (1).
7. Regeneration system for the synergistic removal of pollutants from flue gases according to claim 1, characterized in that the regeneration air blower (8) is equipped with a first frequency converter for controlling the regeneration air flow rate.
8. The regeneration system for the synergic removal of the pollutants from flue gases according to claim 7, characterized in that the main air blower (7) is equipped with a second frequency converter for controlling the flow of the main air.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120637478.0U CN214916161U (en) | 2021-03-29 | 2021-03-29 | Regeneration system for flue gas multi-pollutant collaborative removal |
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| CN202120637478.0U CN214916161U (en) | 2021-03-29 | 2021-03-29 | Regeneration system for flue gas multi-pollutant collaborative removal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112892511A (en) * | 2021-03-29 | 2021-06-04 | 中国华能集团清洁能源技术研究院有限公司 | Regeneration system and method for cooperatively removing multiple pollutants in flue gas |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112892511A (en) * | 2021-03-29 | 2021-06-04 | 中国华能集团清洁能源技术研究院有限公司 | Regeneration system and method for cooperatively removing multiple pollutants in flue gas |
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