CN213178357U - Smoke recycling oxygen-enriched incineration sludge and muddy water co-treatment system - Google Patents
Smoke recycling oxygen-enriched incineration sludge and muddy water co-treatment system Download PDFInfo
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- CN213178357U CN213178357U CN202021107157.1U CN202021107157U CN213178357U CN 213178357 U CN213178357 U CN 213178357U CN 202021107157 U CN202021107157 U CN 202021107157U CN 213178357 U CN213178357 U CN 213178357U
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- flue gas
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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
A kind of smoke recycles the oxygen enrichment to burn mud and mud water coprocessing system, including the fluidized bed incinerator of oxygen enrichment, the mud burns under the condition of oxygen enrichment, the flue gas produced by burning enters the exhaust-heat boiler, provide the heat source for the primary air preheater, preheat the high oxygen content gas that the oxygen making plant produces, the flue gas after the heat exchange is discharged from the exhaust port of the exhaust-heat boiler; after the flue gas discharged by the waste heat boiler is dedusted by an electrostatic precipitator, part of the dedusted flue gas is pumped into an oxygen-enriched fluidized bed incinerator by a flue gas recirculation fan for fluidizing sludge; and after the residual flue gas is sent to a flue gas deacidification tower for deacidification treatment, the flue gas amount collected by a carbon dioxide collecting device is greatly reduced, the main components are nitrogen and oxygen, the nitrogen and the oxygen are introduced into a biological reaction tank of a sewage treatment plant by an induced draft fan to be treated with sewage in a synergistic manner, and simultaneously, the liquid flows into the sewage treatment plant for treatment after the flue gas deacidification tower is washed. Solves the problems of large sludge incineration smoke gas quantity, high concentration of generated nitrogen oxides, chimney and the like.
Description
Technical Field
The utility model relates to a flue gas recirculation oxygen boosting burns mud and muddy water concurrent processing system belongs to the solid waste processing field.
Background
In recent years, with the rapid development of Chinese economy and the acceleration of urbanization process, the treatment amount of municipal sewage and the corresponding sludge amount in China are rapidly increased. Meanwhile, with the development of economy to a higher level and the continuous improvement of the living standard of people, the requirement on environmental protection is higher and higher, the situation of heavy water and light mud is greatly changed in the past, and the requirement on sludge treatment is higher and higher.
The sludge treatment and disposal routes are more, the treatment links comprise deep dehydration, anaerobic digestion, drying, incineration, carbonization and the like, and the main stream modes of the disposal links comprise landfill, land utilization, building material utilization and the like. Various treatment and disposal technical routes have advantages and disadvantages, and the routes should be reasonably selected according to local conditions such as sludge quality, environment holding capacity, market demands and the like.
The heat treatment process mainly using sludge incineration has the advantages of killing virus, eliminating harmful organic matters, completely reducing volume and the like, has gradually become the mainstream of sludge treatment in recent years, and is more and more favored at home and abroad. At present, sludge drying and incineration is one of the mainstream sludge treatment modes in China. However, the traditional sludge incineration technology has certain problems, such as large smoke generation amount, a 'neighbor effect' brought by a high-rise chimney and the like, and brings adverse factors to the healthy development of a sludge drying incineration technical route.
By oxygen-enriched incineration technique for increasing oxygen content, a large proportion of nitrogen (N) in the air is incinerated2) Reducing, using high concentrations of oxygen (O)2) The mixed gas with the withdrawn part of the flue gas (flue gas) is substituted into the furnace air, so that the flue gas amount can be reduced, and the obtained flue gas has high-concentration CO2The gas can be directly processed and sealed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art, provides a smoke recycling oxygen-enriched incineration sludge and muddy water cooperative treatment system, utilizes the characteristics of oxygen-enriched combustion, and uses high oxygen content and smoke recycling to replace conventional air as an oxidant to realize sludge incineration; and at the tail end of the flue gas, a carbon dioxide trapping mode is adopted, the flue gas amount is greatly reduced, and a mud-water-gas synergistic treatment mode is adopted, so that the flue gas emission is reduced to the greatest extent.
In order to achieve the above purpose, the technical solution of the present invention is as follows: a flue gas recirculation oxygen-enriched incineration sludge and muddy water co-treatment system comprises a sludge feeding device, an oxygen-enriched fluidized bed incinerator, an oxygen generation device, a flue gas treatment device and a carbon dioxide capture device, and is characterized in that
The oxygen-enriched fluidized bed incinerator comprises a sludge inlet, an auxiliary fuel inlet, an air inlet and an air outlet, wherein the air outlet is positioned at the top of the oxygen-enriched fluidized bed incinerator;
the device comprises a flue gas treatment device and a waste heat boiler, wherein the flue gas treatment device comprises an electrostatic dust collector and a flue gas deacidification tower, the electrostatic dust collector is connected with an exhaust port of the waste heat boiler, an outlet of the electrostatic dust collector is connected with an air inlet of an oxygen-enriched fluidized bed incinerator through a flue gas recirculation fan, an outlet of the electrostatic dust collector is also connected with the flue gas deacidification tower, an exhaust end at the top of the flue gas deacidification tower is connected with a carbon dioxide capturing device, an exhaust end of the carbon dioxide capturing device is connected to a biological reaction tank of a sewage treatment plant through an induced draft fan, and a drain end; after the flue gas discharged by the waste heat boiler is dedusted by an electrostatic precipitator, part of the dedusted flue gas is pumped into an oxygen-enriched fluidized bed incinerator by a flue gas recirculation fan for fluidizing sludge; and (3) after the residual flue gas is sent to a flue gas deacidification tower for deacidification treatment, the flue gas collected by the carbon dioxide collecting device is guided into a biological reaction tank of a sewage treatment plant by an induced draft fan to be treated with sewage cooperatively, and the liquid flows into the sewage treatment plant for treatment after the flue gas deacidification tower is washed.
Preferably, when the heat value of the sludge is lower and the self-sustaining incineration cannot be met, a sludge drier is arranged in front of a sludge inlet of the oxygen-enriched fluidized bed incinerator and used for improving the heat value of the sludge entering the incinerator.
Preferably, in order to reduce the air leakage rate of the incineration system, namely, the air quantity of the incineration system entering the incinerator is reduced, the sealing strengthening measures of the incineration system are adopted, and the oxygen atmosphere sealing is adopted at the sludge feeding hole.
Preferably, the bottom of the oxygen-enriched fluidized bed incinerator is provided with a slag outlet, and in order to reduce the air leakage rate of an incineration system, a water-sealed slag cooler is adopted at the slag outlet of the incinerator to prevent air from entering the incinerator from the slag outlet.
Preferably, if the sludge heat value of the wet sludge receiving bin is lower, the auxiliary fuel is supplemented through the auxiliary fuel inlet, and the sludge and the auxiliary fuel are mixed and then combusted in the oxygen-enriched fluidized bed incinerator.
Preferably, the auxiliary fuel can be selected from coal, coke, natural gas, diesel oil, etc., as the case may be.
Preferably, the carbon dioxide capture device is connected to a carbon dioxide storage tank, and the carbon dioxide captured by the carbon dioxide capture device is stored in the carbon dioxide storage tank.
The utility model discloses an oxygenerator produces oxygen and goes into stove air oxygen content in order to improve, reduces and burns burning furnace air input to reduce sludge incineration to the demand that supplements the heat, simultaneously because oxygenerator has separated nitrogen gas, thereby reduce pollutants such as nitrogen oxide in the flue gas, reduce the flue gas volume, reduce the flue gas and handle the degree of difficulty and handling cost. The incineration flue gas is discharged into a biological reaction tank of a sewage treatment plant after deacidification treatment, so that an incinerator chimney is omitted, and the environmental friendliness is improved. And discharging the wastewater generated by deacidification treatment of the incineration flue gas into a sewage treatment plant for treatment.
The utility model carries out incineration treatment on sludge by the flue gas recirculation oxygen-enriched incineration technology, collects carbon dioxide in flue gas, reduces the flue gas volume and nitrogen oxide, reduces the heat required by air temperature rise, and is beneficial to reducing the external heat required by sludge incineration; after carbon dioxide is captured, the amount of flue gas is further reduced, and the flue gas is discharged into a sewage treatment plant after deacidification treatment, so that a high chimney is omitted. The utility model provides a sludge incineration flue gas volume big, produce nitrogen oxide concentration great, chimney scheduling problem.
Drawings
FIG. 1 is a flow chart of a flue gas recirculation oxygen-enriched incineration sludge and sludge water cooperative treatment system and a device.
The figure includes: the system comprises a wet sludge receiving bin 1, a sludge feeding device 2, an incinerator 3, an auxiliary fuel inlet 4, a sludge inlet 5, a secondary air inlet 6, a primary air inlet 7, a slag cooler 8, a slag discharge port 9, an oxygen generating device 10, a nitrogen collecting device 11, a primary air preheater 12, a waste heat boiler 13, an electrostatic dust collector 14, a flue gas recirculation fan 15, a flue gas deacidification tower 16, a spray 17, a carbon dioxide collecting device 18, a carbon dioxide storage 19, an induced draft fan 20 and a sewage plant biological reaction tank 21.
Detailed Description
In order to make the present invention more comprehensible, preferred embodiments are described below with reference to the accompanying drawings.
As shown in figure 1, the flue gas recirculation oxygen-enriched incineration sludge and muddy water cooperative treatment system comprises a sludge feeding device 2, an oxygen-enriched fluidized bed incinerator 3, an oxygen generation device 10, a flue gas treatment device and a carbon dioxide capture device 18, and is characterized in that
The oxygen-enriched fluidized bed incinerator 3 comprises a sludge inlet 5, an auxiliary fuel inlet 4, an air inlet and an air outlet positioned at the top of the oxygen-enriched fluidized bed incinerator, wherein the sludge inlet is connected with a wet sludge receiving bin through a sludge feeding device, the air outlet is connected with a waste heat boiler, a primary air preheater is arranged in the waste heat boiler, the air inlet is connected with an oxygen generating device through the primary air preheater, sludge is combusted under the oxygen-enriched condition, smoke generated by combustion enters the waste heat boiler to provide a heat source for the primary air preheater to preheat high-oxygen-content gas generated by the oxygen generating device, and the smoke after heat exchange is discharged from an exhaust port of the waste heat boiler;
the flue gas treatment device comprises an electrostatic dust collector 14 and a flue gas deacidification tower 15, wherein the electrostatic dust collector 14 is connected with an exhaust port of a waste heat boiler 13, an outlet of the electrostatic dust collector 14 is connected with an air inlet of an oxygen-enriched fluidized bed incinerator 3 through a flue gas recirculation fan 15, an outlet of the electrostatic dust collector 14 is also connected with a flue gas deacidification tower 16, an exhaust end at the top of the flue gas deacidification tower 16 is connected with a carbon dioxide capturing device 18, an exhaust end of the carbon dioxide capturing device 18 is connected to a biological reaction tank of a sewage treatment plant through an induced draft fan 20, and a drainage end at the bottom of the flue gas deacidification tower 16 is connected; after the flue gas discharged by the waste heat boiler is dedusted by the electrostatic deduster 14, part of the dedusted flue gas is sent into the oxygen-enriched fluidized bed incinerator 3 by the flue gas recirculation fan 15 for fluidizing sludge; and (3) after the residual flue gas is sent to a flue gas deacidification tower 16 for deacidification treatment, the flue gas collected by a carbon dioxide collecting device 18 is guided into a biological reaction tank 21 of a sewage treatment plant by an induced draft fan to be treated with sewage cooperatively, and the liquid flows into the sewage treatment plant for treatment after being washed in the flue gas deacidification tower.
External wet sludge is received by a wet sludge receiving bin 1 and then is sent to a sludge feeding device 2, the external wet sludge enters an oxygen-enriched incinerator through a sludge inlet 5, the sludge and auxiliary fuel are directly mixed in the incinerator and are combusted under the oxygen-enriched condition, and the incinerated slag enters a slag cooler 8 through a slag outlet; the oxygen generating device 10 generates high oxygen content gas (the oxygen content can reach more than 90 percent) which is heated by the primary air preheater 12 and then enters the incinerator 3 for incineration through the primary air inlet 7 and the secondary air inlet 6, the high oxygen content gas improves the temperature of oxygen entering the incinerator through the primary air preheater, the ignition condition is improved, the incineration temperature is improved, and the incineration stability is improved. Controlling air entering an incineration system, wherein the main components of flue gas generated by incineration at the moment comprise carbon dioxide, nitrogen, unburned air, water vapor and dust, wherein the carbon dioxide accounts for 60-80%; the smoke generates steam through the waste heat boiler 13 for drying wet sludge or other purposes; after the flue gas is dedusted by the electrostatic precipitator 14, the flue gas is fed into the incinerator by a flue gas recirculation fan for fluidizing sludge; the flue gas is deacidified by a deacidification tower 16, passes through a carbon dioxide capturing device 18 and is stored in a carbon dioxide storage tank 19 in a solid dry ice mode; the main components of the flue gas after being captured by the carbon dioxide are nitrogen and oxygen, the flue gas amount is greatly reduced, the oxygen content is high, the flue gas is guided into a biological reaction tank 21 of a sewage treatment plant by a draught fan to be cooperatively treated with sewage, and the sewage is aerated; meanwhile, the liquid flows into a sewage treatment plant for treatment after the cyclic washing in the deacidification tower 16. Whether or not the auxiliary fuel needs to be added to the incinerator 3 and the amount of fuel need to be determined according to the calorific value of the sludge.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications can be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. The utility model provides a flue gas recirculation oxygen boosting burns mud and muddy water concurrent processing system, burns burning furnace, oxygenerator, flue gas processing apparatus, carbon dioxide entrapment device including mud feed arrangement, rich oxygen fluidized bed, its characterized in that:
the oxygen-enriched fluidized bed incinerator comprises a sludge inlet, an auxiliary fuel inlet, an air inlet and an air outlet, wherein the air outlet is positioned at the top of the oxygen-enriched fluidized bed incinerator;
the flue gas treatment device comprises an electrostatic dust collector and a flue gas deacidification tower, the electrostatic dust collector is connected with a gas outlet of a waste heat boiler, an outlet of the electrostatic dust collector is connected with a gas inlet of an oxygen-enriched fluidized bed incinerator through a flue gas recirculation fan, an outlet of the electrostatic dust collector is further connected with the flue gas deacidification tower, an exhaust end at the top of the flue gas deacidification tower is connected with a carbon dioxide collecting device, an exhaust end of the carbon dioxide collecting device is connected to a biological reaction tank of a sewage treatment plant through an induced draft fan, and a drain end at the bottom of the flue gas deacidification tower is connected to the biological.
2. The system of claim 1, wherein a sludge drier is disposed in front of the sludge inlet of the fluidized bed incinerator for increasing the calorific value of the sludge entering the incinerator.
3. The system of claim 1, wherein the oxygen-enriched fluidized bed incinerator is provided with a slag outlet at the bottom, a water-sealed slag cooler is arranged below the slag outlet, and the incinerated slag enters the slag cooler through the slag outlet.
4. The system of claim 1, wherein the carbon dioxide capture device is connected to a carbon dioxide storage tank, and the carbon dioxide captured by the carbon dioxide capture device is stored in the carbon dioxide storage tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021107157.1U CN213178357U (en) | 2020-06-15 | 2020-06-15 | Smoke recycling oxygen-enriched incineration sludge and muddy water co-treatment system |
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| CN202021107157.1U CN213178357U (en) | 2020-06-15 | 2020-06-15 | Smoke recycling oxygen-enriched incineration sludge and muddy water co-treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116854319A (en) * | 2023-05-29 | 2023-10-10 | 山东驰盛新能源设备有限公司 | Sludge treatment method and treatment device thereof |
| CN117619866A (en) * | 2023-10-26 | 2024-03-01 | 上海市政工程设计研究总院（集团）有限公司 | Phosphorus resource recovery method for sludge incineration fly ash |
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2020
- 2020-06-15 CN CN202021107157.1U patent/CN213178357U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116854319A (en) * | 2023-05-29 | 2023-10-10 | 山东驰盛新能源设备有限公司 | Sludge treatment method and treatment device thereof |
| CN116854319B (en) * | 2023-05-29 | 2023-11-24 | 山东驰盛新能源设备有限公司 | Sludge treatment method and treatment device thereof |
| CN117619866A (en) * | 2023-10-26 | 2024-03-01 | 上海市政工程设计研究总院（集团）有限公司 | Phosphorus resource recovery method for sludge incineration fly ash |
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