Method for eliminating air-assisted combustion photovoltaic glass melting foam and defoaming agent

Abstract

The invention relates to the technical field of air-combustion photovoltaic glass production, and specifically provides a method for eliminating air-combustion photovoltaic glass molten foam and a defoaming agent. In the method, the defoaming agent is sprayed outside the kiln, added into a glass batch material, or a combination of the two methods, so that when the glass batch material enters the kiln and melts under high temperature and precipitates tiny bubbles, high-temperature resistant nano material particles in the defoaming agent distributed on the glass batch material immediately act on the tiny bubbles on the surface, and the surface tension of the glass molten foam is reduced by utilizing the surface activity of the high-temperature resistant nano material particles, so that the tiny bubble walls are thinned and broken, thereby achieving rapid elimination of the tiny bubbles and preventing the tiny bubbles from growing and accumulating into large-area foam, thereby solving the technical problem that when the defoaming agent is sprayed in the kiln in the traditional way, the foam has already been generated and affects the thermal effect of the kiln.

Description

Technical Field

[0001] The invention relates to the technical field of air-combustion photovoltaic glass production, and in particular to a method for eliminating air-combustion photovoltaic glass melting foam and a defoaming agent. Background Art

[0002] The market demand for photovoltaic glass has increased rapidly with the increase in the proportion of photovoltaic power generation. The melting capacity of single photovoltaic glass melting furnaces has been upgraded from the initial 250T / D level to more than 1000T / D level, and the production line under construction has reached 1600T / D. At present, large photovoltaic glass melting furnaces encounter a common problem in the process of melting glass batch materials, that is, the foam area is too large, and its coverage area accounts for more than 40% of the melting area of ​​the melting pool.

[0003] The reasons for the large amount of air-assisted combustion melting foam in photovoltaic glass are as follows:

[0004] a. The melting capacity of the furnace increases, the melting rate (the amount of glass melted per unit effective melting area per day) increases, and the melting furnace does not have enough area to distribute the white foam;

[0005] b. The melting of photovoltaic ingredients emphasizes that the flame atmosphere is an oxidizing flame, which has the effect of oxidizing divalent iron (FeO) to trivalent iron (Fe2O3), thereby increasing the light transmittance of the glass; (the coloring ability of FeO in glass is ten times that of Fe2O3)

[0006] c. The glass formula does not contain a reducing agent (carbon powder), but an oxidizing agent (Sb2O3) is added, and the melting state is closer to that of a full oxygen combustion (severe foaming) melting furnace.

[0007] Too large a coverage area causes the following problems in the melting process:

[0008] a. The heat of the flame in the space is reflected, the temperature of the breast wall and the arch top is too high (>1630℃), which accelerates the burning and shortens the life of the kiln;

[0009] b. The foam layer blocks the transfer of heat from the space to the glass liquid, the temperature of the glass liquid in the pool is low, the convection of the feed is weak, the glass batch melts slowly, and the efficiency of the melting furnace decreases;

[0010] c. The foam layer blocks the transfer of space heat to the glass liquid, the temperature of the forming flow glass liquid is low, and the glass liquid is difficult to clarify.

[0011] In the air-combustion melting furnace production of photovoltaic glass with a capacity of more than 1,000 tons per day, a large amount of white foam floating between the material pile and the hot spot has seriously affected the normal operation of the glass. Eliminating the molten foam has become an urgent task to be solved in large-scale photovoltaic glass air-combustion melting furnaces.

[0012] Chinese patent CN109650715A discloses a composite defoamer for eliminating bubbles in glass production and its use method. A composite defoamer suitable for soda-lime-silica glass is mixed with a main component and a solvent, and the mass ratio of the main component to the solvent is 1:2~25; the main component is prepared from raw materials including titanium powder, titanium dioxide, tetrabutyl titanate, ammonium molybdate, vanadium oxide, tungsten oxide, lead oxide and borax, and the mass percentage of each raw material is: titanium powder 1~15wt%, titanium dioxide 1~30wt%, tetrabutyl titanate 50~79wt%, ammonium molybdate 1~20wt%, vanadium oxide 0.5~5wt%, tungsten oxide 0.5~5wt%, lead oxide 0.5~5wt%, borax 1~20wt%, and the sum of the mass percentages of each raw material is 100%. The invention has the characteristics of good defoaming effect, high temperature resistance and good compatibility, and can be used to quickly eliminate bubbles in the glass production process.

[0013] However, according to this technical solution, after a foam layer is formed on the surface of the glass solution inside the kiln, a defoaming agent is sprayed inside the kiln to achieve defoaming. Summary of the invention

[0014] The purpose of the present invention is to address the deficiencies in the prior art and provide a method for eliminating air-assisted combustion of photovoltaic glass melting foam. The defoaming agent is sprayed outside the kiln, added to the glass batch, or a combination of the two. The high-temperature resistant nanomaterial particles in the defoaming agent distributed on the glass batch immediately act on the tiny bubbles on the surface, so that the tiny bubbles are destroyed in the early stage of their generation, preventing the tiny bubbles from growing and accumulating to form a foam layer, thereby solving the technical problem that when the defoaming agent is traditionally sprayed in the kiln, foam has already been generated, affecting the thermal effect of the kiln.

[0015] To achieve the above object, the present invention provides the following technical solutions:

[0016] The method for eliminating air-assisted combustion of photovoltaic glass melting foam is characterized in that the defoaming agent is sprayed outside the kiln, added to the glass batch material, or a combination of the two methods, so that when the glass batch enters the kiln and melts under high temperature and precipitates tiny bubbles, the high-temperature resistant nano material particles in the defoaming agent distributed on the glass batch material immediately act on the tiny bubbles, reducing the surface tension of the tiny bubbles generated by the melting of the glass, and causing the walls of the tiny bubbles to become thinner and rupture.

[0017] As an improvement, the kiln includes a pool bottom, a pool wall, a furnace top and a hanging wall, the pool bottom and the pool wall form a molten pool, the hanging wall is connected to the furnace top and divides the molten pool into a cold zone and a hot zone; a reciprocating feeder is provided above the pool wall, and glass batch material is intermittently fed into the kiln through the reciprocating feeder to form a floating material pile above the molten glass liquid in the molten pool, and a plurality of nozzles for spraying flames are provided above the kiln on the right side of the hanging wall, and flames are sprayed into the kiln through the nozzles to heat the glass liquid in the kiln.

[0018] As an improvement, the external kiln spraying method is that after the glass batch is added into the melting pool of the kiln through a reciprocating feeder, the material pile floats above the molten glass liquid, and before the material pile is pushed into the kiln, the defoaming agent is evenly sprayed on the surface of the floating material pile.

[0019] As an improvement, the defoaming agent is sprayed on the surface of the pile in an atomized manner.

[0020] As an improvement, a spray device is provided between the reciprocating feeder and the hanging wall, and the spray device sprays the defoaming agent uniformly in atomized form onto the upper surface of the material pile.

[0021] As an improvement, the defoaming agent is added to the glass batch. During the glass batch mixing process, the defoaming agent is added to the glass batch in the proportion required by the process and fully mixed. The mixed glass batch is then continuously distributed on the reciprocating feeder and fed into the kiln.

[0022] As an improvement, before the glass batch mixing process, the defoamer is first added to water in a proportion required by the process to form a mixed solution, and then the mixed solution is evenly mixed with the glass batch to make the defoamer evenly dispersed in the glass batch.

[0023] As an improvement, when defoaming is carried out by spraying outside the kiln, the amount of defoaming agent required for each ton of glass liquid is 0.8~1.0 kg.

[0024] As an improvement, when defoaming is performed by adding the defoaming agent into the glass batch, the ratio of the defoaming agent to the glass batch is 1:1000~3000.

[0025] Another object of the present invention is to provide a defoaming agent to address the deficiencies of the prior art, utilizing the surface activity of high temperature resistant nanoparticles in the defoaming agent to reduce the surface tension of bubbles generated by melting glass, thinning and rupturing the walls of tiny bubbles, and achieving rapid defoaming.

[0026] To achieve the above object, the present invention provides the following technical solutions:

[0027] A defoamer, used for eliminating the foam generated by the air-assisted combustion photovoltaic glass melting method, characterized in that the defoamer is composed of the following components in mass percentage: 0.5-2.5% nano silicon dioxide, 0.0-0.5% nano aluminum oxide, 5-15% nano titanium dioxide, 0.0-0.2% nano silicon nitride, 0.0-0.3% nano zirconium oxide, 6-18% alcohol solvent, 4-12% amine dispersant and 58-78% water solvent, the sum of the mass percentages of the above components is 100%, wherein the density of the defoamer is 1.0-1.1 g / ml;

[0028] pH value: 8.0~9.0;

[0029] Viscosity: 3~6mPa·s.

[0030] The beneficial effects of the present invention are:

[0031] (1) The present invention uses a method of spraying the defoamer outside the kiln or mixing the defoamer into the glass batch material, so that the activity of the high-temperature resistant nanoparticles in the defoamer can be used to act on microbubbles in the early stage of bubble generation during the melting process of the glass batch material, thereby reducing the probability of microbubbles growing and accumulating on the surface of the glass liquid to form a foam layer, thereby achieving defoaming at the source of bubble generation.

[0032] (2) The present invention reduces the proportion of foam area in the kiln by eliminating bubbles at the source, thereby improving the melting efficiency. Without increasing the melting amount, the unit consumption of glass is reduced by 3-5%, which significantly saves energy and reduces consumption. At the same time, due to the reduction in fuel consumption, the emissions of sulfides and nitrogen compounds in the flue gas are reduced accordingly.

[0033] (3) The present invention reduces the foam coverage area and the spatial reflected heat of the foam layer, thereby reducing the temperature of the breast wall and the crown of the melting furnace. The surface temperature of the silica bricks on the crown is reduced, which effectively slows down the burning rate of the kiln and increases the service life of the kiln equipment.

[0034] In summary, the present invention has the advantage of defoaming from the source of bubble generation, thereby preventing bubbles from growing and accumulating on the surface of the glass liquid to form a foam layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of spraying a defoaming agent outside the kiln according to the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0038] Embodiment 1

[0039] like Figure 1 As shown, the present embodiment provides a method for eliminating air-assisted combustion of photovoltaic glass melt foam, wherein the defoaming agent 200 is sprayed outside the kiln to achieve defoaming, and when the glass batch material 4 enters the kiln 100 and melts under high temperature and precipitates tiny bubbles, the high-temperature resistant nano material particles in the defoaming agent 200 distributed on the surface of the glass batch material 4 immediately act on the tiny bubbles on the surface, and utilize the surface activity of the high-temperature resistant nano material particles to reduce the surface tension of the glass melt foam, thin the tiny bubble walls and rupture them, thereby achieving rapid elimination of the tiny bubbles and preventing the tiny bubbles from growing and accumulating into large-area foam.

[0040] Preferably, the external kiln spraying method is that after the glass batch material 4 is added into the feeding pool of the kiln 100 through the reciprocating feeder 3, the material pile 6 floats above the molten glass liquid 5, and before the material pile 6 is pushed into the kiln 100, the defoaming agent 200 is evenly sprayed on the surface of the floating material pile 6.

[0041] Preferably, the defoaming agent 200 is sprayed on the surface of the pile 6 in an atomized manner.

[0042] It should be noted that, by spraying the defoaming agent 200 on the surface of the material pile 6, the defoaming agent 200 is evenly distributed on the surface of the material pile 6. During the rapid melting of the glass batch material 4 on the surface of the material pile 6 under high temperature, the tiny bubbles generated on the surface are immediately destroyed by the high-temperature resistant nano-active particles, thereby achieving the purpose of quickly eliminating the bubbles from the source of the bubbles. This avoids the problem in the prior art that the defoaming agent 200 is sprayed on the foam surface for defoaming only after a large number of bubbles accumulate and form a foam layer, thereby affecting the production efficiency of the kiln 100.

[0043] like Figure 1 As shown, the kiln 100 includes a pool bottom 1, a pool wall 2, a furnace roof 10 and a hanging wall 7. The pool bottom 1 and the pool wall 2 form a molten pool. The hanging wall 7 is connected to the furnace roof 10 and divides the molten pool into a cold zone and a hot zone. A reciprocating feeder 3 is provided above the pool wall 2. Glass batch material 4 is intermittently fed into the kiln 100 through the reciprocating feeder 3, and a floating material pile 6 is formed above the molten glass liquid 5 in the molten pool. A plurality of nozzles 9 for spraying flames are provided above the kiln 100 on the right side of the hanging wall 7. Flames are sprayed into the kiln 100 through the nozzles 9 to heat the glass liquid 5 in the kiln 100.

[0044] The spraying device atomizes the liquid defoaming agent 200 through the defoaming agent 200 supply pipe and the nozzle and sprays it evenly on the surface of the pile 6.

[0045] After the material pile 6 enters the kiln 100, it melts under the action of high temperature and absorbs tiny bubbles. The nano-active particles distributed on the surface of the material pile 6 act on the surface of the tiny bubbles, causing the tiny bubbles to burst and disappear.

[0046] In addition, when defoaming is carried out by spraying outside the kiln, the dosage of defoamer 200 is 0.8~1.0 kg per ton of glass liquid. The specific actual dosage can be adaptively adjusted according to the amount of bubbles generated.

[0047] Embodiment 2

[0048] The present embodiment provides a method for eliminating air-assisted combustion of photovoltaic glass melt foam, wherein the defoaming agent 200 is added to the glass batch material 4 to achieve defoaming. When the glass batch material 4 enters the kiln 100 and melts under high temperature to precipitate tiny bubbles, the high-temperature resistant nano material particles in the defoaming agent 200 distributed inside and on the surface of the glass batch material 4 immediately act on the tiny bubbles on the surface, and utilize the surface activity of the high-temperature resistant nano material particles to reduce the surface tension of the glass melt foam, thinning and breaking the tiny bubble walls, thereby achieving rapid elimination of the tiny bubbles and preventing the tiny bubbles from growing and accumulating into large-area foam.

[0049] In this embodiment, before the mixing process of the glass batch material 4 , the defoaming agent 200 is added to the glass batch material 4 according to the proportion required by the process and mixed thoroughly to make the defoaming agent 200 evenly dispersed in the glass batch material 4 .

[0050] Preferably, the defoamer 200 is first added to water according to the process requirement ratio to form a mixed solution, and then the mixed solution is evenly mixed with the glass batch material 4 to make the defoamer 200 evenly dispersed in the glass batch material 4.

[0051] It should be noted that by mixing the defoaming agent 200 inside the glass batch 4, when the glass batch 4 is put into the kiln 100, under the high temperature environment, the surface and the inside of the glass batch 4 begin to melt and produce tiny bubbles. At this time, the high-temperature resistant nanomaterial particles in the defoaming agent 200 located inside the glass batch 4 act on the tiny bubbles on the surface and inside at the same time, so that the bubbles inside and on the surface are destroyed by the nano-active particles in the early stage of their generation, thereby suppressing the generation of bubbles from the inside of the glass batch 4, thereby achieving the purpose of defoaming.

[0052] This embodiment eliminates bubbles generated from both the interior and the surface of the material pile 6, thereby eliminating bubbles from the source and preventing small bubbles from growing and forming a foam layer to affect the production efficiency of the kiln 100.

[0053] In this embodiment, when defoaming is performed by adding the defoaming agent 200 into the glass batch material 4, the ratio of the defoaming agent 200 to the glass batch material 4 is 1:1000-3000.

[0054] Embodiment 3

[0055] This embodiment provides a method for eliminating air-assisted combustion of photovoltaic glass melt foam, wherein the defoaming agent 200 is added to the glass batch material 4 and sprayed onto the surface of the glass batch material 4 by spraying the defoaming agent 200 outside the kiln, thereby achieving rapid defoaming. A spraying device 8 is provided between the reciprocating feeder 3 and the hanging wall 7, and the spraying device 8 sprays the defoaming agent 200 uniformly in atomized form onto the upper surface of the material pile 6; when the glass batch material 4 enters the kiln 100 and melts under high temperature and precipitates tiny bubbles, the high-temperature resistant nanomaterial particles in the defoaming agent 200 distributed inside and on the surface of the glass batch material 4 immediately act on the tiny bubbles on the surface, and utilize the surface activity of the high-temperature resistant nanomaterial particles to reduce the surface tension of the glass melt foam, thinning and breaking the tiny bubble wall, thereby achieving rapid elimination of tiny bubbles and preventing the tiny bubbles from growing and accumulating into large-area foam. It should be noted that in this embodiment, the defoaming agent 200 mixed inside the glass batch material 4 suppresses the generation of internal bubbles. At the same time, the defoaming agent 200 sprayed on the surface of the glass batch material 4 can further quickly suppress the accumulation of bubbles on the surface, thereby achieving efficient suppression of bubble generation and avoiding the accumulation of a large number of bubbles to form a foam layer.

[0056] Embodiment 4

[0057] The defoaming agent used in the method for eliminating air-assisted combustion of photovoltaic glass molten foam in Examples 1 to 3 specifically comprises 0.5-2.5% nano-silicon dioxide, 0.0-0.5% nano-alumina, 5-15% nano-titanium dioxide, 0.0-0.2% nano-silicon nitride, 0.0-0.3% nano-zirconium oxide, 6-18% alcohol solvent, 4-12% amine dispersant and 58-78% water solvent, and the sum of the mass percentages of the above components is 100%.

[0058] The density of the defoamer is 1.0-1.1 g / ml.

[0059] The pH value of the defoamer is 8.0-9.0.

[0060] The viscosity of the defoaming agent is 3-6 mPa·s.

[0061] In this embodiment, the defoaming agent 200 prepared according to the above formula is a light yellow transparent liquid, which is hardly volatile, water-based, non-flammable, and non-toxic.

[0062] Among them, high temperature resistant nano material particles in the defoaming agent are used to achieve rapid defoaming.

[0063] Comparative Example

[0064] During the melting process of the glass batch material 4 in the high temperature environment of the kiln (solid is converted into liquid), a large number of tiny bubbles are generated, and a white foam layer is formed on the upper surface of the glass liquid 5. Under natural conditions, the bubble wall thickness of each single tiny bubble gradually becomes thinner from the initial stage of bubble generation, and it takes a certain amount of time until it breaks. Therefore, more than 40% of the effective melting area in a large photovoltaic glass melting furnace is covered by a white foam layer. For this reason, for these white foams distributed between the glass batch material 4 and the glass mirror area, the defoaming is accelerated by using a space spray atomizing defoamer 200. The defoamer 200 can be sprayed into the kiln through a defoamer gun using a heavy oil or natural gas spray gun position. The solvent in the defoamer 200 is rapidly volatilized, and its nano-surfactant particles are deposited on the surface of the white foam. The rapid diffusion of the nano-particles reduces the surface tension of the tiny bubbles, and the bubble wall becomes thinner and breaks.

[0065] In summary, the present application adds the defoaming agent 200 by spraying outside the kiln and mixing it in the glass batch material 4, thereby reducing the coverage area of ​​the foam, transferring the heat in the kiln 100 directly to the glass liquid 5, and improving the melting efficiency. Without increasing the melting amount, the unit consumption of glass is reduced by 3-5%, and energy saving and consumption reduction are significant. At the same time, due to the reduction in fuel consumption, the emissions of sulfides and nitrides in the flue gas are reduced accordingly.

[0066] In addition, after the defoamer 200 is used, the foam coverage area is reduced, and the operation of two pairs of defoaming guns can achieve the effect of increasing the mirror melting area of ​​1.5 to 2 pairs of small furnaces. For this reason, the oxygen O2 in the oxidizing atmosphere of the space has more opportunities to contact and react with the ferrous oxide FeO in the glass liquid 5 in the increased mirror area, so that more FeO is oxidized to Fe2O3, thereby improving the light transmittance of the original glass sheet;

[0067] In addition, after using the defoamer 200, the foam layer retreats, which is equivalent to releasing the melting capacity of 1.5 to 2 small furnaces. Therefore, the melting capacity can be increased by 10 to 20% while keeping the temperature of the melting space the same as before using the defoamer 200. For a 1000T / D kiln 100, it can be increased to 1100 to 1200T / D, and the annual glass output can be increased by 6.5 to 13 million square meters (2mm thickness). There is almost no depreciation, labor, management fees, etc. in the new production cost. In addition, the melting unit consumption is reduced by 3 to 5%, which will achieve a cost reduction and efficiency improvement of 20 to 25 million yuan per year.

[0068] Due to the presence of a large amount of white foam layer in the large photovoltaic glass kiln 100, it reflects heat into the space, causing the temperature of the breast wall and the crown of the melting furnace to reach above 1630°C, and in some kilns 100, it is even greater than 1660°C, causing the refractory mud between the silicon bricks on the crown to be burned and flow, and the burning of silicon bricks to be accelerated. In the early production of the kiln 100, the large crown was burned through, and serious accidents such as forced hot repair of the melt hole were not isolated cases.

[0069] After using the defoaming agent 200, the maximum temperature of the kiln 100 space drops by 20~40℃, and the surface temperature of the silicon bricks on the top of the kiln 100 drops, which effectively slows down the burning rate of the kiln 100 and ensures that the life of the kiln 100 reaches the designed service life (8~10 years), thereby improving the utilization rate of the kiln 100 and avoiding increasing the depreciation cost of the product.

[0070] In each embodiment of the present application, the percentage of the foam coverage area in the kiln corresponding to the action mode of the different defoaming agents 200 to the effective area of ​​the kiln 100 is shown in the following table:

[0071]

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for eliminating air-assisted combustion of photovoltaic glass melt foam, characterized in that: The defoaming agent (200) is sprayed onto the surface of the glass batch material (4) outside the kiln, added into the glass batch material (4), or a combination of the two methods, so that when the glass batch material (4) enters the kiln (100) and melts under the action of high temperature and precipitates tiny bubbles, the high temperature resistant nano material particles in the defoaming agent (200) distributed on the glass batch material (4) immediately act on the tiny bubbles, reducing the surface tension of the tiny bubbles generated by the melting of the glass, and causing the walls of the tiny bubbles to become thinner and rupture.

2. The method for eliminating air-assisted combustion of photovoltaic glass melt foam according to claim 1, characterized in that: The kiln (100) comprises a pool bottom (1), a pool wall (2), a furnace top (10) and a hanging wall (7); the pool bottom (1) and the pool wall (2) form a molten pool; the hanging wall (7) is connected to the furnace top (10) and divides the molten pool into a cold zone and a hot zone; a reciprocating feeder (3) is provided above the pool wall (2); glass batch material (4) is intermittently fed into the kiln (100) through the reciprocating feeder (3); a floating material pile (6) is formed above the molten glass liquid (5) in the molten pool; a plurality of nozzles (9) for spraying flames are provided above the kiln (100) on the right side of the hanging wall (7); flames are sprayed into the kiln (100) through the nozzles (9) to heat the glass liquid (5) in the kiln (100).

3. The method for eliminating air-assisted combustion of photovoltaic glass melt foam according to claim 2, characterized in that: The external kiln spraying method is that after the glass batch material (4) is added into the molten pool of the kiln (100) via the reciprocating feeder (3), the material pile (6) floats above the molten glass liquid (5), and before the material pile (6) is pushed into the kiln (100), the defoaming agent (200) is evenly sprayed on the surface of the floating material pile (6).

4. The method for eliminating air-assisted combustion of photovoltaic glass melt foam according to claim 3, characterized in that: The defoaming agent (200) is sprayed onto the surface of the pile (6) in an atomized manner.

5. The method for eliminating air-assisted combustion of photovoltaic glass melt foam according to claim 4, characterized in that: A spray device (8) is provided between the reciprocating feeder (3) and the hanging wall (7), and the spray device (8) sprays the defoaming agent (200) uniformly in atomized form onto the upper surface of the material pile (6).

6. The method for eliminating air-assisted combustion of photovoltaic glass melt foam according to claim 2, characterized in that: The defoaming agent (200) is added to the glass batch material (4). During the mixing process of the glass batch material (4), the defoaming agent (200) is added to the glass batch material (4) in a proportion required by the process and fully mixed. The mixed glass batch material (4) is then continuously distributed on the reciprocating feeder (3) and fed into the kiln (100).

7. The method for eliminating air-assisted combustion of photovoltaic glass melt foam according to claim 6, characterized in that: Before the glass batch material (4) mixing step, the defoaming agent (200) is first added to water according to the process requirement ratio to form a mixed solution, and then the mixed solution is evenly mixed with the glass batch material (4) to make the defoaming agent (200) evenly dispersed in the glass batch material (4).

8. The method for eliminating air-assisted combustion of photovoltaic glass melt foam according to any one of claims 1 to 5, characterized in that: When defoaming is carried out by spraying outside the kiln, the amount of defoaming agent (200) required for each ton of glass liquid is 0.8~1.0 kg.

9. The method for eliminating air-assisted combustion of photovoltaic glass melt foam according to any one of claims 6 to 7, characterized in that: When defoaming is performed by adding the defoaming agent (200) to the glass batch material (4), the ratio of the defoaming agent (200) to the glass batch material (4) is 1:1000-3000.

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