CN212482138U - Low nitrogen oxide discharges industrial furnace - Google Patents
Low nitrogen oxide discharges industrial furnace Download PDFInfo
- Publication number
- CN212482138U CN212482138U CN202020803246.3U CN202020803246U CN212482138U CN 212482138 U CN212482138 U CN 212482138U CN 202020803246 U CN202020803246 U CN 202020803246U CN 212482138 U CN212482138 U CN 212482138U
- Authority
- CN
- China
- Prior art keywords
- air
- nitrogen oxide
- furnace
- industrial furnace
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a low nitrogen oxide discharges industrial furnace, discharge monitoring devices including furnace, gas pipeline, nozzle, first air pipeline, waste gas return circuit, second air pipeline and nitrogen oxide. And a first fan and a heat exchanger are arranged on the waste gas loop. The waste circuit is in communication with the first air line through a heat exchanger. And a second fan, a pressure sensor, a flow regulating valve and a temperature sensor are arranged on the second air pipeline. According to the working state of the industrial furnace, the temperature and the oxygen content of the air in the furnace, thereby reducing the emission of nitrogen oxides in the working engineering of the industrial furnace.
Description
Technical Field
The utility model relates to a nitrogen oxide discharges technical field, specifically is a low nitrogen oxide discharges industrial furnace.
Background
In the conventional fossil fuel burner, nitrogen oxides (NOx) of the chemical formula NO and NO2 are inevitably generated by a chemical reaction at the time of combustion. The low NOx combustion technology achieves the purpose of suppressing the generation of nitrogen oxides by structural improvement of a burner such as a mixing form of fuel and air, an air-fuel ratio, and the like. The nitrogen oxides generated during the combustion process react with other oxygen in the atmosphere, causing environmental problems such as smoke and increase of atmospheric ozone.
With the enhancement of environmental awareness and policy in China, the requirement on the emission of nitrogen oxides in the industrial metallurgy industry is continuously improvedThrough previous 300mg/Nm3The upper limit of (2) is required to be increased to 150mg/Nm3. It can also be seen that the limitation and reduction of nitrogen oxide emission of industrial furnaces will be a major direction for the development of industrial furnace technology in the future.
Disclosure of Invention
The utility model aims at providing a low nitrogen oxide discharges industrial furnace to reduce the emission of the nitrogen oxide in the industrial furnace work engineering.
In order to achieve the above object, the utility model adopts the following technical scheme:
an industrial furnace with low nitrogen oxide emission comprises a hearth (100), a gas pipeline (200), a burner (300), a first air pipeline (400) and a waste gas loop (500), wherein one end of the waste gas loop (500) is inserted into the hearth (100), and the other end of the waste gas loop is communicated with the first air pipeline (400).
More preferably, a first fan (510) is arranged on the waste gas loop (500) and used for increasing the flow of the waste gas returning.
More preferably, a heat exchanger (520) is arranged on the exhaust gas loop (500), one end of the heat exchanger is communicated with the first air pipeline (400), and the other end of the heat exchanger is communicated with the exhaust gas loop (500) and used for heating cold air.
More preferably, the industrial furnace with low nitrogen oxide emission also comprises a second air pipeline (600),
one end of the second air pipeline (600) is communicated with the outside air, and the other end is communicated with the burner tip.
More preferably, the second air pipeline (600) is provided with a second fan (610), a pressure sensor (620), a flow sensor (630), a flow regulating valve (640) and a temperature sensor (650) in sequence,
a second fan (610) for introducing air into the second air line (600),
a pressure sensor (620) for detecting the pressure in the second air line (600),
a flow sensor (630) is used to monitor the flow conditions in the second air line (600),
the flow regulating valve (640) is used for cooperating with the flow sensor (630) to complete the regulation of the flow quantity in the second air pipeline (600),
a temperature sensor (650) is used to monitor the temperature in the second air line (600).
More preferably, the industrial furnace with low nitrogen oxide emission further comprises a nitrogen oxide emission monitoring device (700), wherein the nitrogen oxide emission monitoring device (700) is arranged at an exhaust port inside the hearth (100) and used for monitoring the nitrogen oxide emission in the industrial furnace working engineering and recording relevant data.
Drawings
FIG. 1 is a schematic view of the structure of the present invention
In the figure: 100-furnace, 200-gas pipeline, 300-burner, 400-first air pipeline, 500-waste gas circuit, 600-second air pipeline, 700-nitrogen oxide emission monitoring device, 510-first fan, 520-heat exchanger, second fan 610, pressure sensor 620, flow sensor 630, flow regulating valve 640 and temperature sensor 650.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides an embodiment:
an industrial furnace with low nitrogen oxide emission comprises a hearth 100, a gas pipeline 200, a burner 300, a first air pipeline 400, an exhaust gas loop 500, a second air pipeline 600 and a nitrogen oxide emission monitoring device 700.
The exhaust gas loop 500 is provided with a first fan 510 and a heat exchanger 520. The waste circuit 500 communicates with the first air line 400 via a heat exchanger 520. The second air line 600 is provided with a second fan 610, a pressure sensor 620, a flow sensor 630, a flow control valve 640, and a temperature sensor 650.
The waste gas circuit 500 has the function of, on the one hand, performing heat exchange, increasing the air temperature in the first air line 400, increasing the efficiency of the industrial furnace; on the other hand, the air in the first air pipeline 400 is mixed to reduce the oxygen concentration of the air in the furnace, and the emission of nitrogen oxides is reduced. The specific flow is that the first fan 510 is used for guiding the waste gas in the furnace 100 into the waste gas loop 500. The heat exchanger 520 exchanges heat between the temperature of the exhaust gas and the air transferred to the first air duct 400; meanwhile, the exhaust gas in the exhaust gas circuit 500 is merged with the air in the first air duct 400 through the branch duct, and the oxygen gas is reintroduced into the furnace 100 after the oxygen concentration is reduced.
One end of the gas pipeline 200 is externally connected with gas, and the other end is communicated with the burner 300. One end of the first air pipeline 400 is externally connected with the second fan 610 for direct air ventilation, and the other end is connected with the burner 300. The burner 300 is disposed in the furnace 100, and the nitrogen oxide emission monitoring device 700 is disposed near the exhaust stack of the furnace 100. A second air line 600 is connected to the burner 300 together with the first air line 400.
The air in the first air line 400 is preheated hot air at a temperature of 450 c. The second air line 600 is a cold air line directly communicated with natural air, the second fan 610 is used for introducing natural air into the second air line 600, the pressure sensor 620 is used for measuring the air pressure of the second air line 600, the flow sensor 630 is used for measuring the air flow in the second air line 600, the flow regulating valve 640 is used for further regulating the flow and the switch of the second air line 600, and the temperature sensor 650 is used for measuring the temperature of the air in the second air line 600.
When the industrial furnace is in production, the second air line 600 is closed and air is supplied from the first air line 400. Air in the first air pipeline 400 enters the hearth 100, so that the temperature of the hearth is increased, and the thermal efficiency of the furnace is improved.
When the industrial furnace is in off-line maintenance, the first air line 400 is closed and air is sourced from the second air line 600. The cool air in the second air duct 600 enters the furnace 100, and the flame temperature is reduced, so that the generation of nitrogen oxides is reduced.
Claims (6)
1. An industrial furnace with low nitrogen oxide emission comprises a hearth (100), a gas pipeline (200), a burner (300) and a first air pipeline (400),
it is characterized in that the preparation method is characterized in that,
the furnace hearth waste gas recovery system further comprises a waste gas loop (500), wherein one end of the waste gas loop (500) is connected into the furnace hearth (100), and the other end of the waste gas loop is communicated with the first air pipeline (400).
2. The industrial furnace according to claim 1, wherein the exhaust gas loop (500) is provided with a first fan (510) for increasing the flow rate of the exhaust gas returned to the furnace.
3. Industrial furnace according to claim 2, characterised in that the exhaust gas circuit (500) is provided with a heat exchanger (520) having one end communicating with the first air line (400) and one end communicating with the exhaust gas circuit (500) for heating the cold air.
4. The industrial furnace with low nitrogen oxide emission according to claim 1, further comprising a second air pipeline (600),
one end of the second air pipeline (600) is communicated with the outside air, and the other end is communicated with the burner tip.
5. The industrial furnace with low nitrogen oxide emission according to claim 4, wherein the second air pipeline (600) is provided with a second fan (610), a pressure sensor (620), a flow sensor (630), a flow regulating valve (640) and a temperature sensor (650) in sequence,
a second fan (610) for introducing air into the second air line (600),
a pressure sensor (620) for detecting the pressure in the second air line (600),
a flow sensor (630) is used to monitor the flow conditions in the second air line (600),
the flow regulating valve (640) is used for cooperating with the flow sensor (630) to complete the regulation of the flow quantity in the second air pipeline (600),
a temperature sensor (650) is used to monitor the temperature in the second air line (600).
6. The industrial furnace with low nitrogen oxide emission according to any one of claims 1 to 5, further comprising a nitrogen oxide emission monitoring device (700), wherein the nitrogen oxide emission monitoring device (700) is arranged at an exhaust port inside the furnace chamber (100) and is used for monitoring the nitrogen oxide emission in the working process of the industrial furnace and recording related data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020803246.3U CN212482138U (en) | 2020-05-14 | 2020-05-14 | Low nitrogen oxide discharges industrial furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020803246.3U CN212482138U (en) | 2020-05-14 | 2020-05-14 | Low nitrogen oxide discharges industrial furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212482138U true CN212482138U (en) | 2021-02-05 |
Family
ID=74460762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020803246.3U Active CN212482138U (en) | 2020-05-14 | 2020-05-14 | Low nitrogen oxide discharges industrial furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212482138U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048802A (en) * | 2021-04-12 | 2021-06-29 | 重庆赛迪热工环保工程技术有限公司 | Method for reducing nitrogen oxides in multi-control-section heating furnace under low heat load |
-
2020
- 2020-05-14 CN CN202020803246.3U patent/CN212482138U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048802A (en) * | 2021-04-12 | 2021-06-29 | 重庆赛迪热工环保工程技术有限公司 | Method for reducing nitrogen oxides in multi-control-section heating furnace under low heat load |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103343965B (en) | Heating furnace system utilizing oxygen-enriched combustion | |
| CN110793032A (en) | Oxygen-enriched combustion system of heating furnace and control method thereof | |
| CN212482138U (en) | Low nitrogen oxide discharges industrial furnace | |
| CN103088178B (en) | Blast furnace hot-blast stove flue gas self-circulation combustion method and system | |
| CN203112858U (en) | Bleeding oxygen reutilization device in metallurgical production | |
| CN103968409A (en) | High-temperature low-oxygen combustion device | |
| CN203784990U (en) | High-temperature low-oxygen combustion apparatus | |
| CN115784569A (en) | Combustion enhancing system of glass kiln | |
| CN216114730U (en) | Dual-fuel low-nitrogen gas hot blast stove | |
| CN208952122U (en) | A kind of device reducing the nitrogen oxides in flue gases of cock oven by waste gas circulation | |
| CN210079252U (en) | Direct type low temperature flue gas SCR deNOx systems | |
| CN108649248B (en) | Hydrogen recovery system of cold rolling treatment line annealing furnace | |
| CN207350356U (en) | Smoke-heating device for denitrating system | |
| CN112923391B (en) | Air preheater capable of reducing NOx emission of tail gas of heating furnace and using method | |
| CN215982646U (en) | Direct spray humidification type low-nitrogen energy-saving recovery system | |
| CN214840949U (en) | Boiler system for reducing carbon monoxide emission | |
| CN217764426U (en) | Ultralow-emission low-calorific-value gas heating furnace | |
| CN215062018U (en) | Flue gas recirculation device for coke oven gas | |
| CN212673868U (en) | Kiln tail gas recycling and applying device | |
| CN212299900U (en) | Secondary aluminum smelting oxy-fuel combustion device | |
| CN219453929U (en) | Low-nitrogen energy-saving heat accumulating furnace | |
| CN216079790U (en) | Direct-fired natural gas hot air supply system | |
| CN218380514U (en) | Combustion-supporting regulating system for regenerative heating furnace | |
| CN221684576U (en) | Incinerator for treating combustible tail gas | |
| CN220867461U (en) | Low-gas-consumption gas baking system of iron-mixing furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |