Multi-channel integrated heat accumulating type burner

Abstract

According to the multi-channel integrated heat accumulating type burner, the left side and the right side of the burner are respectively provided with a plurality of air channel groups in rows in the vertical direction, and the air channel groups on the two sides are sequentially arranged in a staggered mode in the vertical direction; the air channel set comprises an air channel and a gas channel which are arranged on the same plane in an included angle mode, and air outlets of the air channel and the gas channel converge on the inner wall of the burner. Through the multi-channel integrated design, the whole air flow is dispersed to a plurality of outlets to be led out, the directions of the outlets and the inlets of fuel gas are regulated, a rotational flow field is formed in the smelting furnace, and the combustion efficiency is improved; meanwhile, the structure can disperse combustion points, stir the hearth atmosphere in combination with high-speed airflow, reduce the temperature gradient in the furnace, improve the temperature uniformity in the furnace and avoid local overheating or oxidation of the crucible, so that the smelting quality is improved, the generation of thermal nitrogen oxides is inhibited, and the environment-friendly effect is achieved; and through the heat accumulator structure, flue gas waste heat is recycled alternately, combustion air is preheated, the gas consumption is reduced, and the energy-saving effect is achieved.

Description

Technical Field

[0001] This utility model relates to a multi-channel integrated regenerative burner, specifically a multi-channel integrated regenerative burner for magnesium alloy crucible melting furnaces, belonging to the field of industrial heating equipment and energy-saving combustion technology. Background Technology

[0002] Currently, traditional burners in the magnesium alloy smelting process suffer from problems such as high energy consumption, uneven temperature distribution, and large pollutant emissions.

[0003] While existing regenerative burners can achieve certain energy-saving effects, they are complex in structure, have high installation and maintenance costs, and are difficult to meet the requirements of environmental protection and efficient smelting.

[0004] Therefore, there is an urgent need to develop a new type of burner that is efficient, environmentally friendly, and reliable to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a multi-channel integrated regenerative burner for magnesium alloy crucible melting furnaces.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A multi-channel integrated regenerative burner has several gas channel groups arranged vertically in rows on the left and right sides of the burner.

[0008] The gas duct assembly includes an air duct and a gas duct arranged at an angle on the same plane, and the outlets of the air duct and the gas duct converge at the inner wall of the burner.

[0009] The airway groups on the left and right sides described above have airways that serve as each other's air intake and exhaust channels.

[0010] The inner wall of the burner is W-shaped, and the air outlets of the left and right air passage groups are respectively located on the two sides of the "∧" shape, with the air outlet directions being far apart from each other.

[0011] Furthermore, the outlet of the aforementioned gas duct is located on the extension line of the waist side of the "∧" symbol, and the adjacent side wall is provided with a guide groove corresponding to the outlet of the gas duct.

[0012] Based on the bottom projection of the burner, the air passage groups on the left and right sides are arranged alternately.

[0013] Based on the bottom projection of the burner, the outlets of the air passage and the gas passage are triangular on the inner wall of the burner.

[0014] The airway groups on the left and right sides are arranged in a staggered manner along the vertical direction.

[0015] The air inlets of the aforementioned left and right air ducts are equipped with heat storage elements, which include honeycomb ceramics.

[0016] The inner diameter of the air passage is larger than the inner diameter of the gas passage.

[0017] The advantages of this utility model are:

[0018] This utility model discloses a multi-channel integrated regenerative burner, which disperses the entire gas flow to multiple outlets through a multi-channel integrated design, thereby regulating the direction of the gas outlet and inlet to form a swirling flow field in the smelting furnace, increasing the mixing degree of air and gas, reducing energy loss caused by incomplete combustion, and thus improving combustion efficiency and achieving energy saving effect.

[0019] Meanwhile, this structure can disperse the combustion point, and combined with the high-speed airflow to agitate the furnace atmosphere, reduce the temperature gradient inside the furnace, improve the temperature uniformity inside the furnace, and avoid local overheating or oxidation of the crucible, thereby improving the smelting quality, inhibiting the generation of thermal nitrogen oxides, and achieving environmental protection effects.

[0020] By installing a heat storage body at the air inlet of the air duct to absorb or supplement the heat of the passing gas, and by alternately recovering the waste heat of the flue gas, the combustion air is preheated to above 800°C, significantly reducing gas consumption (energy saving rate can reach 20%~40%). The heat storage combustion technology reduces the peak combustion temperature, inhibits the generation of thermal nitrogen oxides, further reduces pollutant emissions, and saves energy and protects the environment.

[0021] This utility model discloses a multi-channel integrated regenerative burner, which has a simple structure, is easy to install, has a compact and reliable structure, effectively reduces the failure rate and maintenance costs, and effectively solves the problems of high energy consumption, uneven temperature distribution and large pollutant emissions in current magnesium alloy smelting technology. It has strong practicality and wide applicability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the burner's air inlet side.

[0023] Figure 2 This is a schematic diagram of the gas outlet side of the burner.

[0024] Figure 3 This is a schematic diagram of the inner wall of the burner and cross-sectional views along the AA and CC directions.

[0025] Figure 4 This is a flow direction diagram corresponding to the AA and CC directions.

[0026] Figure 5 A structural diagram and airflow direction diagram showing that the left and right airway groups are not staggered.

[0027] The meanings of the markings in the attached diagram are as follows:

[0028] 1. Gas duct, 2. Air duct, 3. Heat storage body, 4. Air guide channel. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] A multi-channel integrated regenerative burner consists of a burner, several air channels 2 and gas channels 1.

[0032] The burners are arranged vertically.

[0033] An air duct and a fuel gas duct constitute a duct group, located on the same plane within the burner. Preferably, the air duct and the fuel gas duct are arranged at an angle of 9-45°.

[0034] Several air passage groups are arranged vertically within the burner body, preferably, such as Figure 1-4 As shown, several air passage groups are provided on the left and right sides of the burner, arranged in vertical rows. Preferably, the air passage groups on the left and right sides are staggered vertically, i.e., distributed at different heights.

[0035] The inner wall of the burner is W-shaped, with a convex ridge in the middle and peaks and valleys on both sides.

[0036] Based on the bottom projection of the burner, the left and right air passage groups are staggered. The air outlets of the air passages and gas passages in the same group converge at the inner wall of the burner; preferably, the air outlets of the left and right air passage groups (the air outlets of the air passages and gas passages in the same group) are respectively located on the two waist sides of the "∧" shaped ridge, and the air outlet directions are far apart from each other; more preferably, the gas outlet is located on the extension line of the waist side of the "∧"; that is, the gas outlet is submerged in the burner, and at the same time, the adjacent side wall (valley edge) is provided with an air guide groove 4 corresponding to the gas outlet of the gas passage, and the end of the air guide groove 4 is the gas outlet of the gas passage.

[0037] Based on the above structure, the air outlet of the air passage is located outside the air outlet of the gas passage. Preferably, based on the bottom projection of the burner, the air outlets of both the air passage and the gas passage are triangular on the inner wall of the burner, which facilitates gas collection and guidance.

[0038] The air inlets on the left and right sides of the air duct are also equipped with heat storage bodies 3. Preferably, the material and structure of the heat storage body 3 can be honeycomb ceramic.

[0039] In this invention, the left and right air ducts serve as air inlets and outlets for each other. That is, while one air duct is used to allow air to enter, the other air duct is used to expel smoke.

[0040] When using,

[0041] The burner is installed on the side of the smelting furnace.

[0042] Phase 1:

[0043] Taking the left air passage group as an example, the right air passage group is not used (the right air passage is the exhaust passage, and the right gas passage is not used).

[0044] Air and fuel gas enter the burner from the air duct and fuel gas duct on the left, respectively, and enter the smelting furnace from the air outlet on the right. They mix and burn, forming a multi-layered vortex in the smelting furnace.

[0045] The mixed combustion gases circulate along the inner wall of the smelting furnace, utilizing the resulting swirling flow field to improve combustion efficiency; a portion of the gas, after swirling, enters the air passage on the right side and is discharged from the burner; this cycle continues.

[0046] The gas from the burner is discharged to heat the heat storage body 3 at the air inlet of the air passage on the right side.

[0047] Phase Two:

[0048] like Figure 4 As shown, this is the reverse of stage one.

[0049] Air enters through the air inlet on the right side of the air duct, is preheated by the heated regenerator 3 at the air inlet, and then enters the smelting furnace, where it mixes with the gas flowing in the same direction and burns inside the smelting furnace, forming a multi-layered vortex.

[0050] Similarly,

[0051] A portion of the mixed combustion gases circulates along the inner wall of the smelting furnace; another portion of the mixed combustion gases circulates along the inner wall of the smelting furnace, enters the air duct on the left side, and is discharged; this cycle continues.

[0052] The exhaust gas heats the heat storage body 3 at the air inlet of the left air passage.

[0053] Phase Three:

[0054] By repeating stages one and two, the regenerator 3 is utilized repeatedly, while the gas flows in opposite directions within the melting furnace. This high-speed airflow agitates the furnace atmosphere, reduces the temperature gradient within the furnace, and prevents localized overheating or oxidation of the crucible. Simultaneously, regenerative combustion technology is used to lower the peak combustion temperature and suppress the formation of thermal nitrogen oxides.

[0055] Example 2

[0056] like Figure 5 The structure shown has air outlets on the left and right sides of the airway group located on the two sides of the "∧" shape, with the air outlet directions being far apart from each other.

[0057] Meanwhile, based on the bottom projection of the burner, the air passage groups on the left and right sides are not staggered.

[0058] At the same time, the left and right airway groups can be at the same height.

[0059] The usage method is the same as in Example 1.

[0060] like Figure 5 As shown in Figure B, air and fuel gas enter the burner from the air duct and fuel gas duct on the left, respectively, and then enter the smelting furnace from the gas outlet on the left. They mix and burn, forming multi-layered swirls in the smelting furnace. After the mixed combustion gases circulate along the inner wall of the smelting furnace, a portion of the gases enters the air duct on the right, exits the burner, and heats the heat storage body 3 at the air inlet of the right air duct.

[0061] like Figure 5 As shown in Figure A, when air enters from the air inlet on the right side of the air duct, it is preheated by the heat storage body 3 at the air inlet before entering the smelting furnace. There, it mixes with the combustion gas flowing in the same direction and burns inside the furnace, forming a multi-layered vortex. A portion of the gas enters the air duct on the left side, exits the burner, and heats the heat storage body 3 at the air inlet on the left side of the air duct.

[0062] This cycle continues.

[0063] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A multi-channel integrated regenerative burner, characterized in that, Several air passage groups are arranged vertically in rows on the left and right sides of the burner. The gas duct assembly includes an air duct and a gas duct arranged at an angle on the same plane, and the outlets of the air duct and the gas duct converge at the inner wall of the burner.

2. The regenerative burner according to claim 1, characterized in that, The air ducts on the left and right sides are each other's air intake and exhaust ducts.

3. The regenerative burner according to claim 1, characterized in that, The inner wall of the burner is W-shaped, and the air outlets of the left and right air passage groups are respectively located on the two sides of the "∧" shape, with the air outlet directions being far apart from each other.

4. The regenerative burner according to claim 3, characterized in that, The gas outlet of the gas duct is located on the extension line of the two waist sides of the "∧" symbol, and the adjacent side walls are provided with gas guide grooves corresponding to the gas outlet of the gas duct.

5. The regenerative burner according to claim 1, characterized in that, Based on the bottom projection of the burner, the left and right air passage groups are arranged alternately.

6. The regenerative burner according to claim 1, characterized in that, The left and right airway groups are arranged in a staggered manner along the vertical axis.

7. The regenerative burner according to claim 1, characterized in that, Based on the bottom projection of the burner, the outlets of the air passage and the gas passage are triangular on the inner wall of the burner.

8. The regenerative burner according to claim 1, characterized in that, The air inlets of the left and right air ducts are equipped with heat storage elements, which include honeycomb ceramics.

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