CN209744402U - NOx emission reduction structure based on water-exchange energy-saving system - Google Patents
NOx emission reduction structure based on water-exchange energy-saving system Download PDFInfo
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- CN209744402U CN209744402U CN201920402704.XU CN201920402704U CN209744402U CN 209744402 U CN209744402 U CN 209744402U CN 201920402704 U CN201920402704 U CN 201920402704U CN 209744402 U CN209744402 U CN 209744402U
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- water
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- saving system
- combustion
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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
Abstract
The utility model discloses a NOx emission reduction structure based on a water-exchange energy-saving system, which comprises a boiler and a chimney communicated with the boiler through a discharge pipe; the boiler is provided with a burner which is communicated with a combustion-supporting air inlet pipe; the discharge pipe is provided with a water-exchange energy-saving device and is communicated with a combustion air inlet pipe through a circulating flue gas recovery pipe; the boiler exhaust smoke is cooled through the water exchange energy saver, enters the combustion air inlet pipe through the circulating smoke recycling pipe and is mixed with the entering outside air to form mixed gas at the temperature lower than 150 ℃, and a low-temperature combustion-supporting gas supply structure for the combustor is formed.
Description
Technical Field
The utility model relates to a heat energy supply system, it is specific, its show a NOx emission reduction structure based on water trades energy-saving system.
Background
In the field of modern production technology, the utilization of heat energy is distributed in various links of social production, and a heating medium boiler is a common heat energy supply device which supplies heat energy at different temperatures in the production process.
After the fuel and air mixture enters the hearth, the temperature of the mixture airflow rises quickly due to convection and radiation heating of surrounding high-temperature flue gas. When the ignition temperature is reached, the fuel begins to burn, at which point the temperature rises sharply to a level close to the adiabatic temperature. Meanwhile, due to convection and radiation heat exchange between the flue gas and the surrounding medium, the temperature is gradually reduced until the temperature of the flue gas is the same as that of the surrounding medium, namely the flue gas flows through the whole hearth while being cooled. It follows that the flame temperature distribution within the furnace is in fact not uniform. Usually, the temperature is highest at a distance from the burner outlet, and is lower both before and after it, i.e. there is a local high temperature zone. Since the temperature in this zone is much higher than the average temperature level in the furnace, it has a large effect on the amount of NOx produced: the higher the temperature, the more NOx is produced.
NOx (nitrogen oxides) are primarily Nitric Oxide (NO) and nitrogen dioxide (NO2), which are present in the atmosphere and for a period of time to the extent that they have a deleterious effect on humans, animals, plants and other substances, and form pollutants.
Therefore, it is necessary to provide a NOx reduction structure based on a water-shift energy-saving system to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a NOx reduces discharging structure based on water changes energy-saving system, it cools off the hot-blast of retrieving through water changes energy-saving system, guarantees that the air temperature that gets into the combustor does not exceed 150 ℃, can effectively reduce NOx's formation and emission.
The technical scheme is as follows:
A NOx emission reduction structure based on a water-exchange energy-saving system comprises a boiler and a chimney communicated with the boiler through an exhaust pipe; the boiler is provided with a burner which is communicated with a combustion-supporting air inlet pipe; the discharge pipe is provided with a water-exchange energy-saving device and is communicated with a combustion air inlet pipe through a circulating flue gas recovery pipe; the boiler exhaust smoke is cooled through the water exchange energy saver, enters the combustion air inlet pipe through the circulating smoke recycling pipe and is mixed with the entering outside air to form mixed gas at the temperature lower than 150 ℃, and a low-temperature combustion-supporting gas supply structure for the combustor is formed.
further, an air treatment device is arranged on the discharge pipe.
Further, the air treatment device is composed of an air preheater.
Further, the end of the combustion air inlet pipe is provided with an air blower.
Furthermore, a smoke circulating butterfly valve is arranged on the circulating smoke recycling pipe.
Compared with the prior art, the utility model discloses a water changes energy-saving system and cools off the hot-blast of retrieving, guarantees that the air temperature that gets into the combustor does not exceed 150 ℃, can effectively reduce NOx's formation and emission.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
Example (b):
Referring to fig. 1, the embodiment shows a NOx emission reduction structure based on a water-exchange energy-saving system, which includes a boiler 1 and a chimney 3 communicated with the boiler 1 through an exhaust pipe 2; the boiler 1 is provided with a burner 11, and the burner 11 is communicated with a combustion-supporting air inlet pipe 4; the water-exchange energy-saving device 5 is arranged on the discharge pipe 2, and the discharge pipe is communicated with the combustion air inlet pipe 4 through a circulating flue gas recycling pipe 6; the flue gas discharged by the boiler 1 is cooled by the water exchange energy saver 5, enters the combustion-supporting air inlet pipe 4 through the circulating flue gas recovery pipe 6, is mixed with the entering outside air to form mixed gas at the temperature lower than 150 ℃, and forms a low-temperature combustion-supporting gas supply structure for the combustor.
An air treatment device 7 is also provided on the discharge pipe 2.
The air treatment device 7 is constituted by an air preheater.
The end of the combustion air inlet pipe 4 is provided with a blower 8.
A flue gas circulation butterfly valve 9 is arranged on the circulation flue gas recovery pipe 6.
Compared with the prior art, the utility model discloses a water changes energy-saving system and cools off the hot-blast of retrieving, guarantees that the air temperature that gets into the combustor does not exceed 150 ℃, can effectively reduce NOx's formation and emission.
What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.
Claims (5)
1. A NOx emission reduction structure based on a water-exchange energy-saving system is characterized in that: comprises a boiler and a chimney communicated with the boiler through a discharge pipe; the boiler is provided with a burner which is communicated with a combustion-supporting air inlet pipe; the discharge pipe is provided with a water-exchange energy-saving device and is communicated with a combustion air inlet pipe through a circulating flue gas recovery pipe; the boiler exhaust smoke is cooled through the water exchange energy saver, enters the combustion air inlet pipe through the circulating smoke recycling pipe and is mixed with the entering outside air to form mixed gas at the temperature lower than 150 ℃, and a low-temperature combustion-supporting gas supply structure for the combustor is formed.
2. The NOx emission reduction structure based on the water-shift energy-saving system according to claim 1, wherein: an air treatment device is also arranged on the discharge pipe.
3. The NOx emission reduction structure based on the water-shift energy-saving system according to claim 2, characterized in that: the air treatment device is composed of an air preheater.
4. The structure of any one of claims 1 to 3 for reducing NOx emission based on a water-shift energy-saving system, wherein: the end of the combustion air inlet pipe is provided with a blower.
5. the NOx emission reduction structure based on the water-change energy-saving system according to claim 4, wherein: a smoke circulating butterfly valve is arranged on the circulating smoke recycling pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920402704.XU CN209744402U (en) | 2019-03-27 | 2019-03-27 | NOx emission reduction structure based on water-exchange energy-saving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920402704.XU CN209744402U (en) | 2019-03-27 | 2019-03-27 | NOx emission reduction structure based on water-exchange energy-saving system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209744402U true CN209744402U (en) | 2019-12-06 |
Family
ID=68718700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920402704.XU Active CN209744402U (en) | 2019-03-27 | 2019-03-27 | NOx emission reduction structure based on water-exchange energy-saving system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209744402U (en) |
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2019
- 2019-03-27 CN CN201920402704.XU patent/CN209744402U/en active Active
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