阅读说明：本技术 节能环保蓄热式横火焰炉顶加料玻璃熔炉及生产方法 (Energy-saving environment-friendly heat accumulating type transverse flame furnace top charging glass melting furnace and production method ) 是由 卢爱民 于 2021-09-10 设计创作，主要内容包括：本发明申请涉及一种节能环保蓄热式横火焰炉顶加料玻璃熔炉及生产方法。本发明熔炉的熔化部为长方形,长度方向分成五个串联通的区,第一区为玻璃原料加料预熔区,第二区为熔化区,第三区为均化澄清区,第四区为熔化区,第五区为玻璃原料加料预熔区,助燃空气在长边二端第一区和第五区交替换向喷入,燃料在第二区和第四区及第三区二侧胸墙上多喷口喷入,玻璃原料在长边二端第一区和第五区的拱顶加入,熔化好的玻璃液在第三区中部排出,熔化池玻璃液深度平均减少80％。本发明可以大幅提高玻璃液质量,大幅降低熔化温度和蓄热室温度,大幅提高炉龄,大幅降低能耗和污染物排放,大幅降低投资。(The invention relates to an energy-saving environment-friendly heat accumulating type transverse flame furnace top charging glass melting furnace and a production method thereof. The melting part of the melting furnace is rectangular, the length direction of the melting furnace is divided into five series-connected areas, the first area is a glass raw material feeding pre-melting area, the second area is a melting area, the third area is a homogenizing and clarifying area, the fourth area is a melting area, the fifth area is a glass raw material feeding pre-melting area, combustion-supporting air is alternately sprayed in the first area and the fifth area at two ends of the long edge in a reversing way, fuel is sprayed in a plurality of nozzles on the chest walls at two sides of the second area, the fourth area and the third area, glass raw materials are added into the arch tops of the first area and the fifth area at two ends of the long edge, molten glass liquid is discharged from the middle part of the third area, and the depth of the glass liquid in a melting tank is averagely reduced by 80%. The invention can greatly improve the quality of molten glass, greatly reduce the melting temperature and the temperature of the heat storage chamber, greatly improve the furnace life, greatly reduce the energy consumption and pollutant discharge and greatly reduce the investment.)

1. An energy-saving and environment-friendly heat accumulating type transverse flame furnace top charging glass melting furnace and a production method are characterized in that a melting part of the glass melting furnace is rectangular, the length direction of the melting part is divided into five communicated areas in series, a first area is a left glass raw material charging preheating area, a second area is a left melting area, a third area is a homogenizing clarification area, a fourth area is a right melting area, a 5 th area is a right glass raw material charging preheating area, and glass melting pools of the first area and the fifth area are 0-200 mm deep; the vault is respectively provided with one or more feed inlets; the end breast wall or the side breast wall is respectively provided with an air/flue gas inlet and outlet, and the glass melting tanks of the second area and the fourth area are 50 mm to 200 mm deep; a plurality of fuel nozzles are arranged on the breast walls at two sides, and the depth of the glass melting tank at the third area is 200 mm to 1500 mm; a plurality of fuel nozzles are arranged on the two lateral breast walls; one or more glass liquid one-way outlets are arranged in the middle of the side wall of the glass melting tank.

2. The glass melting furnace of claim 1, wherein the melting portion of the furnace has a rectangular shape and a length to width ratio of 2 to 10.

Technical Field

The invention relates to a glass melting furnace, in particular to an energy-saving environment-friendly heat accumulating type transverse flame furnace top charging glass melting furnace and a production method thereof

Background

Most of the existing heat accumulating type transverse flame glass melting furnaces are provided with a plurality of pairs of heat accumulating chambers and combustion air/flue gas inlets and outlets on two side breast walls of a melting part, and fuel spray guns are arranged at the lower parts of the inlets and outlets. A charging hole is arranged on the rear end breast wall of the melting part, and the depth of the molten glass in the melting part is between 1200 mm and 1600 mm. This structure has 2 important drawbacks: the first defect is that the quality of molten glass is reduced due to strong convection of the molten glass in the melting tank, the service life of the melting tank is shortened, the energy consumption is increased, and the manufacturing cost is increased. The second defect is that the temperature of the combustion air in the melting part and the high-temperature flue gas generated after the fuel is combusted enter the regenerator at the opposite side in a short distance, so that the temperature of the flue gas entering the regenerator is very high; the service life of the regenerative chamber is shortened; the energy consumption is increased; the cost is increased. In order to overcome the defects of the existing transverse flame glass melting furnace, the inventor applies for an invention patent (a novel heat accumulating type transverse flame glass tank furnace, the patent number ZL200810094038.4) and a utility model patent (an environment-friendly, high-efficiency and energy-saving glass melting furnace feeding device, the patent number ZL201821991185.7) which are subsequent improvements of the two patents.

Disclosure of Invention

The invention aims to overcome the above major defects in the prior art and provide a method for greatly prolonging the flame and smoke stroke; the depth of the molten glass is greatly reduced; changing the feeding position; the novel heat accumulating type transverse flame glass melting furnace changes the injection positions of combustion air and fuel. The glass melting furnace of the invention avoids the harmful convection of the glass liquid, reduces the temperature of the flue gas entering the regenerator, and realizes the great improvement of the quality of the glass liquid; greatly reducing energy consumption and pollutant discharge; the service life of the smelting furnace is greatly prolonged; greatly reduces the cost of the smelting furnace. The invention provides a production method of the glass melting furnace.

In order to realize the purpose, the melting part of the energy-saving and environment-friendly heat accumulating type transverse flame furnace top charging glass melting furnace is rectangular, and the length direction is divided into five areas which are communicated in series: the first zone is a glass raw material feeding pre-melting zone on the left side, the second zone is a melting zone on the left side, the third zone is a left-right shared homogenizing and clarifying zone, the 4 th zone is a melting zone on the right side, and the fifth zone is a glass raw material feeding pre-melting zone on the right side. Air/flue gas inlet and outlet are arranged on the end part breast walls or two side breast walls of the 1 st area and the fifth area and are communicated with the regenerator, and one or more feed inlets are arranged at the top. And a plurality of fuel spray guns are arranged on the breast walls at the two sides of the second area, the fourth area and the third area. The middle part of the third zone is provided with 1 or more one-way molten glass outlets.

As optimization, the molten glass depth of the melting tank: the first and fifth zones are 0 mm to 200 mm, the second and fourth zones are 50 mm to 266 mm, and the third zone is 200 mm to 1000 mm.

Preferably, the length-to-width ratio of the melting part is 5 to 10.

As optimization, the area melting rate of the melting tank is 0.8 ton to 1.5 ton/square meter/day, and the volume melting rate is 4 ton to 8 ton/cubic meter/day.

Preferably, the height of the breast wall on the flame space side of the first zone to the fifth zone of the melting part is 800 mm to 1600 mm.

For optimization, 12 to 48 fuel spray guns are arranged on the second zone, the fourth zone and the third zone on two sides of the furnace.

As optimization, the maximum melting capacity of the melting furnace is 2500 tons/day

As an optimization, the powdery glass raw material added into the melting furnace is pressed into a block with the single weight of 1 to 10 kilograms.

The invention relates to an energy-saving environment-friendly furnace heat accumulating type transverse flame furnace top charging glass melting furnace and a production method thereof, and the operation flow of the energy-saving environment-friendly furnace heat accumulating type transverse flame furnace top charging glass melting furnace is as follows:

combustion-supporting air enters the left regenerator from the bottom of the left regenerator of the smelting furnace through the left air/flue gas inlet and outlet, is sprayed into the first zone from the left air/flue gas inlet and outlet after being preheated, is further heated by glass liquid and a batch pile, and then is subjected to peroxy combustion by the fuel sprayed by the second zone and the breast walls on the two sides of the zone, the oxygen-enriched combustion product generated by combustion enters the third zone and is continuously subjected to oxy-fuel combustion by the fuel sprayed by the breast walls on the side of the zone, the oxygen-enriched combustion product generated by combustion enters the fourth zone and is continuously and completely combusted by the fuel sprayed by the breast walls on the side of the zone, the combustion product of the generated low oxygen and low nitrogen oxides enters the fifth zone and is subjected to heat absorption and temperature reduction by the glass liquid and the batch pile, and the combustion product after being cooled enters the right regenerator from the right regenerator through the right air/flue gas inlet and outlet and is discharged from the bottom after being subjected to heat absorption and temperature reduction by the right regenerator. After the operation is carried out for a certain time, the direction is changed, combustion-supporting air enters from the bottom of the heat storage chamber on the right side, the processes are repeated, combustion products are discharged from the bottom of the heat storage chamber on the left side, and the two sides alternately operate. The fuel injection is not reversed and both sides are operated simultaneously.

The glass raw materials freely fall into the top charging ports of the first area and the fifth area by gravity, are pre-melted into low-temperature molten glass by flue gas, then flow into the second area and the fourth area in a single direction, are heated to 1450 ℃ by flame, then flow into the third area in a single direction, and flow out through a molten glass outlet in a single direction after the glass flame is heated in the third area to finish clarification and homogenization.

After the technical scheme is adopted, the energy-saving environment-friendly heat accumulating type transverse flame furnace top charging glass melting furnace and the production method have the following advantages:

1. because the glass raw materials freely fall into the top charging opening of the first area by gravity, and the fuel spray gun is not arranged in the first area, the temperature of the first area can be greatly reduced. The high-temperature flue gas generated by the combustion of the second zone, the fourth zone and the third zone can enter the regenerator only after being absorbed and cooled by the glass raw material piles and the molten glass in the first zone and the fifth zone, so that the exhaust gas temperature and the regenerator temperature are greatly reduced, and the manufacturing cost of the regenerator is greatly reduced.

2. Because the depth of the molten glass in each zone of the whole furnace is greatly reduced, the molten glass among the zones flows in a single direction, harmful convection is avoided, and the molten glass is not polluted, the melting quality of the molten glass is greatly improved, the corrosion to a melting tank is reduced, the melting temperature is reduced, the energy consumption is reduced, and the manufacturing cost of the melting tank is reduced.

3. Because combustion air is alternately sprayed in the first zone and the fifth zone of the melting part and flows linearly at a long distance, fuel is sprayed in multiple spray guns on the breast walls at two sides of the second zone, the fourth zone and the third zone simultaneously, and oxygen in the combustion air is burnt out at the tail end of the last 1 zone of the discharged smoke, the whole melting part can be adjusted and controlled to be more than 70 percent of area oxidation atmosphere, and less than 30 percent of area before the discharged smoke is weak reduction or neutral atmosphere, thereby improving the clarification capability of the smelting furnace and greatly reducing the emission of oxynitride.

Drawings

FIG. 1 is a schematic view of an energy-saving and environment-friendly heat accumulating type transverse flame furnace top charging glass furnace and a production method thereof.

Detailed Description

The invention discloses an energy-saving and environment-friendly heat accumulating type transverse flame furnace top charging glass furnace and a production method, and the specific implementation mode shown in figure 1 is as follows:

the length direction of the melting part is provided with five series-communicated areas: the first zone 1 is a left massive glass raw material feeding preheating zone, the second zone 2 is a left melting zone, the third zone 3 is a homogenizing clarification zone, the fourth zone 4 is a right melting zone, and the fifth zone 5 is a right massive glass raw material feeding preheating zone. The top parts of the first area 1 and the fifth area 5 are respectively provided with two left charging openings 6 and two right charging openings 7, and the end breast wall is provided with a left air/smoke inlet and outlet 8 and a right air/smoke inlet and outlet 9. A plurality of fuel spray guns 10 are arranged on two lateral breast walls of the second zone 2, the fourth zone 4 and the third zone 3. The middle part of the third zone 3 is provided with a molten glass outlet 11. The left air/flue gas injection outlet 8 and the right air/flue gas inlet and outlet 9 are respectively communicated with a left heat storage chamber 12 and a right heat storage chamber 13. The lower parts of the left regenerator 12 and the right regenerator 13 are respectively communicated with a left air/flue gas inlet and outlet 14 and a right air/flue gas inlet and outlet 15. The area of the melting part is 110.4 meters and 13.6 meters which are 1500 square meters, the volume of the molten glass is 300 cubic meters, and the maximum melting amount is 1500 tons/day. The melting area of the first zone 1 and the fifth zone 5 was 500 square meters in total, the depth of the glass melting bath was 30 mm, and the height of the breast wall was 1200 mm. The melting area of the second zone 2 and the fourth zone 4 was 500 square meters in total, the depth of the glass melting tank was 80 mm, and the height of the breast wall was 1200 mm. The third zone 3 had a melting area of 500 square meters, a glass melting tank depth of 500 mm and a breast wall height of 1200 mm.

The specific operation flow is as follows:

combustion-supporting air enters the bottom of a regenerator 12 on the left side of the smelting furnace through a left air/flue gas inlet and outlet 14, the combustion-supporting air is preheated by the left regenerator 12 and then is sprayed into a first zone 1 through a left air/flue gas inlet and outlet 8, the combustion-supporting air is further heated by molten glass and a material pile and then is subjected to peroxy combustion by the fuel sprayed by a second zone 2, a third zone 3 and a left breast wall fuel nozzle 7, the generated high-temperature oxygen-enriched combustion product enters a 4 th zone and is subjected to neutral complete combustion by the fuel sprayed by a right breast wall fuel nozzle 7, the generated combustion product of low oxygen and low nitrogen oxides enters a fifth zone 5 and is subjected to heat absorption and temperature reduction by the molten glass and the material pile, the cooled combustion product enters a right regenerator 13 through a right air/flue gas inlet and outlet 9 and is discharged from a bottom right air/flue gas inlet and outlet 15 after being subjected to heat absorption and temperature reduction by the right regenerator 13. After the operation is carried out for a certain time, the direction is changed, combustion-supporting air enters from the bottom of the right regenerator 13 through the right air/flue gas inlet and outlet 15, after the processes are repeated, combustion products are discharged from the bottom of the left regenerator 12 through the left air/flue gas inlet and outlet 14, and the two sides alternately operate. The fuel is injected without reversing, and both sides are combusted simultaneously.

Blocky glass raw materials fall into the first area 1 and the fifth area 5 at the top charging hole 6 of the first area 1 and the top charging hole 7 of the fifth area 5, are melted into molten glass by flue gas and then flow into the second area 2 and the fourth area in a single direction, the molten glass in the second area 2 and the fourth area is heated to 1450 ℃ by flame and then flows into the third area 3 in a single direction, and the molten glass in the third area 3 is heated to 1500 ℃ by flame, is clarified and homogenized and then flows out in a single direction through the outlet 11 for forming.

By adopting the technical scheme, the quality, particularly the clarification quality, of the molten glass is remarkably improved, the content of oxynitride in the discharged flue gas is greatly reduced to be below 50 mg/standard cubic meter, the energy consumption is greatly reduced to be below 4288 kilojoules/kilogram of molten glass, the manufacturing cost of the smelting furnace is greatly reduced by more than 50%, and the service life of the smelting furnace is more than 6 years.