CN210602281U - Ultralow nitrogen emission gas hot blast stove - Google Patents
Ultralow nitrogen emission gas hot blast stove Download PDFInfo
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- CN210602281U CN210602281U CN201921541957.1U CN201921541957U CN210602281U CN 210602281 U CN210602281 U CN 210602281U CN 201921541957 U CN201921541957 U CN 201921541957U CN 210602281 U CN210602281 U CN 210602281U
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Abstract
The utility model discloses an ultralow nitrogen discharges gas hot-blast furnace, including hot-blast furnace and dense and weak combustor, the main part of hot-blast furnace is a cylinder, dense and weak combustor is located the one end of cylinder, with the main part of hot-blast furnace is a whole, be equipped with air current disturbance device between the combustion chamber of dense and weak combustor and the furnace, a gas and an air distribution hole device is lastThe gas exhaust jet holes are arranged in a staggered way corresponding to the two gas exhaust jet holes. The utility model discloses a do a whole combustion apparatus with hot-blast furnace and dense-dilute combustor and carry out the low nitrogen design, cut apart the burning through the gas orifice to flame, cut apart many little torch burning with flame under the lean oxygen situation, the flue gas of lean oxygen burning enters into furnace and mixes in 2 air, carry out the diffusion combustion with remaining fuel again, the condition that produces nitrogen oxide in every burning is all destroyed, therefore the NOX that produces discharges can be very low, exit temperature is steerable 150 ~ 900 ℃ within range and flue gas discharge NOX < 30mg/m3。
Description
Technical Field
The utility model relates to an industrial gas flue gas hot-blast furnace is a device with the flue gas of burning as the heat source, and the primary usage is that enterprise stoving heating and each trade flue gas emission pretreatment systems such as steel mill, smelting plant, cement manufacture trade provide the heat source.
Background
Referring to the latest national standard GB 13271-2012 emission Standard of atmospheric pollutants for boilers: newly-built gas boiler NOx emission can not exceed 200mg/m and carry out heavy labor (100 ppm), and the key area does not exceed 150mg/m and carry out heavy labor (75 ppm). With the promotion of national environmental protection on NOx emission requirements, at present, a plurality of provinces and cities are introduced to be used as local boiler standards, such as Beijing, Zheng, and the like, which require that the emission of nitrogen oxides cannot exceed 30mg, while the existing industrial gas flue gas hot blast stove cannot meet the requirements. In order to reduce NOx emissions at the source, it is necessary to develop an ultra low nitrogen emission stove with a burner integrated into the stove.
Disclosure of Invention
An object of the utility model is to provide a flue gas of emission contains super low hot-blast furnace of nitrogen oxide, this hot-blast furnace has utilized techniques such as flame cutting, oxygen concentration, staged combustion, simple structure, and the maintenance is simple, and exit temperature is steerable 150 ~ 900 ℃ within range and fume emission NOX < 30mg/m3。
The utility model adopts the technical proposal that: the utility model provides an ultralow nitrogen discharges gas hot-blast furnace which characterized in that: including hot-blast furnace and dense-dilute combustor, the main part of hot-blast furnace is a cylinder, dense-dilute combustor is located the one end of cylinder, with the main part of hot-blast furnace is a whole, be equipped with the air current disturbance device between the combustion chamber of dense-dilute combustor and the furnace, evenly distributed has air jet hole and gas orifice on gas and the air distribution hole device, and the distribution of air jet hole and gas orifice corresponds two row's gas orifice dislocation layout for one row of gas orifice.
The utility model is composed of an air inlet, an air channel, an air box, a combustion-supporting air adjusting device, a gas distribution bag, a gas inlet, a gas distribution pipe, a primary gas and air distribution hole device, a secondary gas and air distribution hole device, a combustion chamber and a furnace chamber, wherein the gas inlet, the gas distribution bag, the air box, the combustion-supporting air adjusting device and the gas distribution pipe are positioned at one end of the cylinder, the air inlet is positioned at the other end of the cylinder, the combustion chamber and the hearth are positioned in the cylinder, the air channel is a gap between the combustion chamber and the hearth and the outer shell of the hot blast stove, the air channel is divided into two outlets at the combustion chamber, one outlet is connected to the wind box, the other outlet is connected to the combustion chamber, the primary gas and air distribution hole device is vertically arranged between the combustion-supporting air adjusting device and the combustion chamber, and the secondary gas and air distribution hole device is arranged between the air channel and the combustion chamber.
Be equipped with air current disturbance device between combustion chamber and the furnace for flue gas after residual air and the oxygen deficient combustion in the combustion chamber mix the back and get into furnace.
The utility model designs the thick and thin burner at the end of the hot blast stove, the gas and the air are designed to be sprayed into the combustion chamber from a plurality of small holes, the gas sprayed from each small hole is mixed with the air to form a plurality of small flames in the combustion chamber, thereby cutting a large flame into hundreds of small flames; the air is divided into 2 air strands before entering the combustion chamber, one air strand enters the combustion chamber after flow control, the whole combustion chamber is in an oxygen-deficient state, because the fuel is in the oxygen-deficient state during combustion, the oxygen content is not high, so that the flame temperature is low, and the generation amount of nitrogen oxides in both temperature type and fuel type is very low; the fuel that does not burn completely and flue gas mist get into furnace and continue burning after another share of air mixes, and air and flue gas volume are many especially, because the air is surplus in a large number, and combustion temperature is also lower on the low side equally, also can make the formation of temperature type nitrogen oxide reduce, so the utility model discloses the nitrogen oxide that produces is corresponding also low very much.
The utility model discloses a do a whole combustion apparatus with hot-blast furnace and dense-dilute combustor and carry out the low nitrogen design, cut apart the burning through the gas orifice to flame, cut apart many little torch burning with flame under the poor oxygen situation, the flue gas of poor oxygen burning enters into furnace and mixes the furnaceMixing the mixture into air for 2 times, and then carrying out dispersion combustion with the rest fuel, wherein the condition of generating nitrogen oxide by each combustion is destroyed, so that the generated NOX emission is very low, the outlet temperature can be controlled within the range of 150-900 ℃, and the NOX discharged by flue gas is less than 30mg/m3。
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a gas and air jet distribution diagram of the present invention;
in fig. 1, air inlet; 2. an air duct; 3. an air box; 4. a combustion air conditioning unit; 5. a gas distribution package; 6. a gas inlet; 7. a gas distribution pipe; 8. a primary gas and air distribution hole device; 9. the secondary gas and air distribution hole device; 10. a combustion chamber; 11. an air flow perturbation device; 12. a hearth; 13. air jet holes; 14. and (4) spraying holes by using fuel gas.
Detailed Description
The invention will be further explained with reference to the drawings and the detailed description below:
the utility model discloses each part structure is independent existence, adopts split integrated mode to connect between each part to give air and gas mixture to leave sufficient space between air distributor and gas distribution package in proportion, just the utility model discloses the structure is unified air and gas and gets into in the combustion chamber earlier to same passageway, and has got into furnace and carry out the postcombustion in the combustion chamber after having burnt for the first time, has reached flue gas nitrogen oxide emission standard in advance under the corresponding operating mode condition, has solved follow-up interpolation nitrogen oxide emission reduction equipment, has consequently reached the purpose that high-efficient energy-saving subtracts the consumption.
The structure and arrangement features of the present invention are further described below:
as can be seen from figure 1, the utility model relates to a super low nitrogen discharges gas combustion's hot-blast furnace, including hot-blast furnace and shade combustor, the main part of hot-blast furnace is a cylinder, shade combustor is located the one end of cylinder, with the main part of hot-blast furnace is a whole. The thick and thin burner consists of an air inlet 1, an air duct 2, an air box 3, a combustion-supporting air adjusting device 4, a fuel gas distribution bag 5, a fuel gas inlet 6, a fuel gas distribution pipe 7, a primary fuel gas and air distribution hole device 8, a secondary fuel gas and air distribution hole device 9, a combustion chamber 10, an airflow disturbance device 11, a hearth 12, 13 air spray holes and 14 fuel gas spray holes, wherein the gas inlet, the gas distribution bag, the wind box, the combustion-supporting air adjusting device and the gas distribution pipe are positioned at one end of the cylinder, the air inlet is positioned at the other end of the cylinder, the combustion chamber and the hearth are positioned in the cylinder, the air channel is a gap between the combustion chamber and the hearth and the shell of the hot blast stove, the air channel is divided into two outlets at the combustion chamber, one outlet is connected with the air box, the other outlet is connected with the combustion chamber, the primary gas and air distribution hole device is vertically arranged in the combustion chamber, and the secondary gas and air distribution hole device is arranged between the air channel and the combustion chamber. The gas and air distribution hole device is uniformly distributed with air jet holes and gas jet holes, and the air jet holes and the gas jet holes are distributed in a way that one row of gas jet holes are staggered with two rows of exhaust gas jet holes.
Air is received at an air inlet 1 and then enters a wind box 3 through an air duct 2, a strand of air passes through a combustion-supporting air adjusting device 4 and then is sprayed into a combustion chamber 10 from hundreds of small air holes on a primary gas and air distribution hole device 8, meanwhile, gas enters a gas distribution bag 5 through a gas inlet 6 and is distributed to a gas distribution pipe 7 and then is sprayed into the combustion chamber 10 from hundreds of small gas holes on the primary gas and air distribution hole device 8, the whole combustion chamber is in an oxygen-deficient state under the adjustment of the combustion-supporting air adjusting device 4, at the moment, the gas is in the oxygen-deficient state during combustion, the oxygen content is not high, so that the flame temperature is low, and the generation amount of nitrogen oxides of the temperature type and the fuel type is low; the other air and fuel gas are sprayed into the combustion chamber 10 through the secondary fuel gas and air distribution hole device 9, the rest air enters the hearth 12 through the airflow disturbance device 11 to be mixed with the oxygen-deficient combusted flue gas in the combustion chamber 10 and then is continuously combusted, the air and flue gas amount is large in the combustion process, and due to the fact that a large amount of excess air is available, the combustion temperature is also low, and the generation amount of temperature type nitrogen oxides can be reduced.
The components of the utility model are welded, the appearance of the whole product is in a single cylinder shape, no complex outer belt component is provided, the appearance is simple and beautiful, and the practicability is strong; meanwhile, the built-in gas distribution bag, the gas spray pipe, the air multi-time distribution device, the gas multi-time distribution device and the combustion chamber are connected with the main body of the hot blast stove into a whole through welding.
The embodiments of the present invention are only descriptions of the preferred embodiments of the present invention, not the limitations of the concept and scope of the present invention, and the technical solutions of the present invention should fall into the protection scope of the present invention without departing from the design idea of the present invention.
Claims (2)
1. The utility model provides an ultralow nitrogen discharges gas hot-blast furnace which characterized in that: including hot-blast furnace and dense-dilute combustor, the main part of hot-blast furnace is a cylinder, dense-dilute combustor is located the one end of cylinder, with the main part of hot-blast furnace is a whole, be equipped with the air current disturbance device between the combustion chamber of dense-dilute combustor and the furnace, evenly distributed has air jet hole and gas orifice on gas and the air distribution hole device, and the distribution of air jet hole and gas orifice corresponds two row's gas orifice dislocation layout for one row of gas orifice.
2. The ultra-low nitrogen emission gas hot blast stove according to claim 1, characterized in that: the concentrated and diluted combustor comprises an air inlet, an air channel, an air box, a combustion-supporting air adjusting device, a fuel gas distribution bag, a fuel gas inlet, a fuel gas distribution pipe, a primary fuel gas and air distribution hole device, a secondary fuel gas and air distribution hole device, a combustion chamber and a hearth, wherein the fuel gas inlet, the fuel gas distribution bag, the air box, the combustion-supporting air adjusting device and the fuel gas distribution pipe are located at one end of a cylinder, the air inlet is located at one end of the cylinder, the combustion chamber and the hearth are located in the cylinder, the air channel is a gap between the combustion chamber and the outer shell of the hot air furnace, the air channel is divided into two outlets at the combustion chamber, one outlet is connected with the air box, the other outlet is connected with the combustion chamber, the primary fuel gas and air distribution hole device is vertically arranged in the combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921541957.1U CN210602281U (en) | 2019-09-17 | 2019-09-17 | Ultralow nitrogen emission gas hot blast stove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921541957.1U CN210602281U (en) | 2019-09-17 | 2019-09-17 | Ultralow nitrogen emission gas hot blast stove |
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| CN210602281U true CN210602281U (en) | 2020-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513887A (en) * | 2019-09-17 | 2019-11-29 | 岳阳远大热能设备有限公司 | Ultralow nitrogen discharged fuel gas hot-blast stove |
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2019
- 2019-09-17 CN CN201921541957.1U patent/CN210602281U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513887A (en) * | 2019-09-17 | 2019-11-29 | 岳阳远大热能设备有限公司 | Ultralow nitrogen discharged fuel gas hot-blast stove |
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