CN110848726A - Energy-saving denitration device for hazardous waste incineration system - Google Patents
Energy-saving denitration device for hazardous waste incineration system Download PDFInfo
- Publication number
- CN110848726A CN110848726A CN201911117050.7A CN201911117050A CN110848726A CN 110848726 A CN110848726 A CN 110848726A CN 201911117050 A CN201911117050 A CN 201911117050A CN 110848726 A CN110848726 A CN 110848726A
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- Prior art keywords
- heat exchanger
- temperature medium
- hazardous waste
- low
- denitration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/343—Heat recovery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention relates to a hazardous waste incineration system component, in particular to an energy-saving denitration device for a hazardous waste incineration system. It includes steam heat exchanger, denitration tower, draught fan and chimney. The heat exchanger is characterized by also comprising a first heat exchanger and a second heat exchanger. The low-temperature medium outlet of the first heat exchanger is connected with the low-temperature medium inlet of the second heat exchanger, the low-temperature medium outlet of the second heat exchanger is connected with the low-temperature medium inlet of the steam heat exchanger, the low-temperature medium outlet of the steam heat exchanger is connected with the air inlet of the denitration tower, the air outlet of the denitration tower is connected with the high-temperature medium inlet of the second heat exchanger, the high-temperature medium outlet of the second heat exchanger is connected with the chimney through a pipeline, and the induced draft fan is connected in series on the section of pipeline between the second heat exchanger and the chimney. The denitration device consumes less energy, has lower operation cost and reaches the standard of smoke emission.
Description
Technical Field
The invention relates to a hazardous waste incineration system component, in particular to an energy-saving denitration device for a hazardous waste incineration system.
Background
At present, the denitration device of the conventional hazardous waste incineration system is shown in fig. 1. It includes steam heat exchanger 1, combustion chamber 2, denitration tower 3, draught fan 4 and chimney 5. The outlet of the cold medium of the steam heat exchanger 1 is connected with the inlet of the combustion chamber 2 in a gas phase mode, the gas outlet of the combustion chamber 2 is in butt joint with the denitration tower 3, the denitration tower 3 is connected with the chimney 5 through a pipeline, and the induced draft fan 4 is connected in series on the section of pipeline between the denitration tower 3 and the chimney 5. When the steam heat exchanger is used, the induced draft fan 4 and the combustion chamber 2 are started, and high-temperature steam is sent into a steam port of the steam heat exchanger 1. The flue gas (the temperature is about 70 ℃) to be denitrated is sent into the steam heat exchanger 1 from the low-temperature medium inlet of the steam heat exchanger 1, and under the action of the induced draft fan 4, the flue gas is exhausted into the atmosphere through the chimney 5 after sequentially passing through the steam heat exchanger 1, the combustion chamber 2, the denitration tower 3 and the induced draft fan 4. The flue gas forms the heat exchange with high-temperature steam when passing through steam heat exchanger 1, is heated to about 140 ℃, and the flue gas is when passing through combustion chamber 2, and the natural gas that is burnt is about 200 ℃, and denitration is accomplished to the flue gas of about 200 ℃ when passing through denitration tower 3. When the denitration device is used, the temperature of flue gas is increased by about 70 ℃ through steam firstly, and then is increased by about 60 ℃ through natural gas combustion heating, so that the consumption of the steam and the natural gas is high, the consumed energy is more, and the operation cost is high. Moreover, natural gas produces SO when combusted2And harmful gases such as CO and the like, so that the smoke emission does not reach the standard.
Disclosure of Invention
The invention aims to solve the technical problem of providing an energy-saving denitration device for a hazardous waste incineration system, which consumes less energy, has lower operation cost and achieves the standard of flue gas emission.
In order to solve the problems, the following technical scheme is provided:
the energy-saving denitration device for the hazardous waste incineration system comprises a steam heat exchanger, a denitration tower, an induced draft fan and a chimney. The heat exchanger is characterized by also comprising a first heat exchanger and a second heat exchanger. The high temperature medium import of first heat exchanger is used for linking to each other with the bag collector of hazardous waste incineration system, the high temperature medium export of first heat exchanger is used for linking to each other with the flue gas deacidification tower of hazardous waste incineration system, the low temperature medium export of first heat exchanger links to each other with the low temperature medium import of second heat exchanger, the low temperature medium export of second heat exchanger links to each other with steam heat exchanger's low temperature medium import, steam heat exchanger's low temperature medium export links to each other with the air inlet of denitrating tower, the gas outlet of denitrating tower links to each other with the high temperature medium import of second heat exchanger, the high temperature medium export of second heat exchanger passes through the pipeline and links to each other with the chimney, just the draught fan is established ties on that section pipeline between.
Wherein, the denitration tower is an SCR denitration tower.
By adopting the scheme, the method has the following advantages:
the energy-saving denitration device for the hazardous waste incineration system further comprises a first heat exchanger and a second heat exchanger, a high-temperature medium inlet of the first heat exchanger is connected with a bag type dust collector of the hazardous waste incineration system, a high-temperature medium outlet of the first heat exchanger is connected with a flue gas deacidification tower of the hazardous waste incineration system, a low-temperature medium outlet of the first heat exchanger is connected with a low-temperature medium inlet of the second heat exchanger, a low-temperature medium outlet of the second heat exchanger is connected with a low-temperature medium inlet of a steam heat exchanger, a low-temperature medium outlet of the steam heat exchanger is connected with an air inlet of the denitration tower, an air outlet of the denitration tower is connected with a high-temperature medium inlet of the second heat exchanger, a high-temperature medium outlet of the second heat exchanger is connected with a chimney through a pipeline, and an induced draft fan is connected in. The energy-saving denitration device utilizes the high-temperature flue gas of a hazardous waste incineration system to heat the flue gas to be denitrated to about 130 ℃, utilizes the denitrated flue gas to heat the flue gas before denitration to about 160 ℃, utilizes steam to heat the flue gas to be denitrated to about 200 ℃, and only needs extra steam to strip the high temperature of about 40 ℃, compared with the prior art that the flue gas is heated from 70 ℃ to about 200 ℃ by all extra energy sources, the energy consumption is greatly reduced, and the operation cost is reduced. Moreover, heating without burning natural gasThereby avoiding the smoke from containing a large amount of SO2And harmful gases such as CO and the like, and the smoke emission always reaches the emission standard.
Drawings
FIG. 1 is a schematic view of a denitration apparatus of a hazardous waste incineration system in the background art;
FIG. 2 is a schematic structural diagram of an energy-saving denitration apparatus for a hazardous waste incineration system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 2, the energy-saving denitration device for a hazardous waste incineration system of the invention comprises a steam heat exchanger 1, a denitration tower 3, an induced draft fan 4, a chimney 5, a first heat exchanger 6 and a second heat exchanger 7. The denitration tower 3 is an SCR denitration tower 3. The high temperature medium import of first heat exchanger 6 is used for linking to each other with the bag collector of hazardous waste incineration system, the high temperature medium export of first heat exchanger 6 is used for linking to each other with the flue gas deacidification tower of hazardous waste incineration system, the low temperature medium export of first heat exchanger 6 links to each other with the low temperature medium import of second heat exchanger 7, the low temperature medium export of second heat exchanger 7 links to each other with the low temperature medium import of steam heat exchanger 1, the low temperature medium export of steam heat exchanger 1 links to each other with the air inlet of denitration tower 3, the gas outlet of denitration tower 3 links to each other with the high temperature medium import of second heat exchanger 7, the high temperature medium export of second heat exchanger 7 passes through the pipeline and links to each other with chimney 5, just draught fan 4 establishes ties on that section pipeline between second heat exchanger 7 and chimney 5.
During the use, install this denitrification facility in the hazardous waste system of burning, link to each other the high temperature medium import of first heat exchanger 6 with the bag collector of hazardous waste system of burning, the high temperature medium export of first heat exchanger 6 links to each other with the flue gas deacidification tower of hazardous waste system of burning, and the steam inlet of steam heat exchanger 1 links to each other with external steam generator. During the operation, start draught fan 4, the flue gas temperature of treating the denitration is about 70 ℃ and enters into first heat exchanger 6 from the low temperature medium of first heat exchanger 6 earlier, carries out the heat exchange with the high temperature flue gas that comes from among the hazardous waste incineration system bag collector, and the temperature of treating the denitration flue gas rises to about 130 ℃. Then, the flue gas to be denitrated at about 130 ℃ enters the second heat exchanger 7, and exchanges heat with the denitrated high-temperature flue gas, and the temperature of the flue gas to be denitrated rises to about 160 ℃. Then, the flue gas to be denitrated with the temperature of about 160 ℃ enters the steam heat exchanger 1 to exchange heat with high-temperature steam, and the temperature of the flue gas to be denitrated rises to about 200 ℃. And then, the flue gas to be denitrated at about 200 ℃ enters a denitration tower 3 for denitration, and the temperature is reduced to about 190 ℃. And then, the denitrated flue gas at about 190 ℃ enters a second heat exchanger 7 to exchange heat with the flue gas to be denitrated, so that waste heat recovery is realized. And finally, the denitrated flue gas enters a chimney 5 under the action of an induced draft fan 4 and is discharged.
Claims (2)
1. An energy-saving denitration device for a hazardous waste incineration system comprises a steam heat exchanger (1), a denitration tower (3), an induced draft fan (4) and a chimney (5); the device is characterized by also comprising a first heat exchanger (6) and a second heat exchanger (7); the high-temperature medium inlet of the first heat exchanger (6) is connected with a bag type dust collector of a hazardous waste solid incineration system, the high-temperature medium outlet of the first heat exchanger (6) is connected with a flue gas deacidification tower of the hazardous waste solid incineration system, the low-temperature medium outlet of the first heat exchanger (6) is connected with the low-temperature medium inlet of the second heat exchanger (7), the low-temperature medium outlet of the second heat exchanger (7) is connected with the low-temperature medium inlet of the steam heat exchanger (1), the low-temperature medium outlet of the steam heat exchanger (1) is connected with the air inlet of the denitration tower (3), the air outlet of the denitration tower (3) is connected with the high-temperature medium inlet of the second heat exchanger (7), and the high-temperature medium outlet of the second heat exchanger (7) is connected with the chimney (5) through a pipeline, and the induced draft fan (4) is connected in series on the section of pipeline between the second heat exchanger (7) and the chimney (5).
2. The energy-saving denitration device for the hazardous waste solid incineration system according to claim 1, wherein the denitration tower (3) is an SCR denitration tower (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911117050.7A CN110848726A (en) | 2019-11-19 | 2019-11-19 | Energy-saving denitration device for hazardous waste incineration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911117050.7A CN110848726A (en) | 2019-11-19 | 2019-11-19 | Energy-saving denitration device for hazardous waste incineration system |
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| Publication Number | Publication Date |
|---|---|
| CN110848726A true CN110848726A (en) | 2020-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911117050.7A Pending CN110848726A (en) | 2019-11-19 | 2019-11-19 | Energy-saving denitration device for hazardous waste incineration system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112843978A (en) * | 2020-12-28 | 2021-05-28 | 上海域德环保工程有限公司 | Two-way sealed intensification denitrification facility of flue is burnt to danger useless |
-
2019
- 2019-11-19 CN CN201911117050.7A patent/CN110848726A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112843978A (en) * | 2020-12-28 | 2021-05-28 | 上海域德环保工程有限公司 | Two-way sealed intensification denitrification facility of flue is burnt to danger useless |
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