CN111087164A - High-efficiency energy-saving environment-friendly heat exchange type external sintering glass melting furnace and production method - Google Patents
High-efficiency energy-saving environment-friendly heat exchange type external sintering glass melting furnace and production method Download PDFInfo
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- CN111087164A CN111087164A CN201911426836.7A CN201911426836A CN111087164A CN 111087164 A CN111087164 A CN 111087164A CN 201911426836 A CN201911426836 A CN 201911426836A CN 111087164 A CN111087164 A CN 111087164A
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- melting
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- glass
- homogenizing
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- 238000002844 melting Methods 0.000 title claims abstract description 78
- 230000008018 melting Effects 0.000 title claims abstract description 78
- 239000011521 glass Substances 0.000 title claims abstract description 34
- 238000005245 sintering Methods 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 15
- 239000000446 fuel Substances 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 239000006060 molten glass Substances 0.000 claims abstract description 8
- 238000003723 Smelting Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 18
- 239000006066 glass batch Substances 0.000 claims description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 15
- 239000003546 flue gas Substances 0.000 claims description 15
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 210000000481 breast Anatomy 0.000 claims description 4
- 239000002419 bulk glass Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims 2
- 238000006477 desulfuration reaction Methods 0.000 claims 1
- 230000023556 desulfurization Effects 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 150000002978 peroxides Chemical class 0.000 claims 1
- 238000005352 clarification Methods 0.000 abstract description 10
- 125000002081 peroxide group Chemical group 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 description 5
- 238000000265 homogenisation Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000005361 soda-lime glass Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 125000000864 peroxy group Chemical group O(O*)* 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/04—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in tank furnaces
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B3/00—Charging the melting furnaces
- C03B3/02—Charging the melting furnaces combined with preheating, premelting or pretreating the glass-making ingredients, pellets or cullet
- C03B3/023—Preheating
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/18—Stirring devices; Homogenisation
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Melting And Manufacturing (AREA)
Abstract
The invention discloses a high-efficiency energy-saving environment-friendly heat exchange type external sintering glass melting furnace and a production method thereof, which improves the structure and the operation mode of the traditional heat exchange type glass melting furnace as follows; the smelting furnace is divided into a homogenizing clarification area, a first melting area and a second melting area, a cooling area and a combustion-supporting gas nozzle are arranged at the discharge end of the homogenizing clarification area, the combustion-supporting gas nozzle is arranged at the discharge end of the cooling area, and a metal heat exchanger, a rotating tooth vertical discharger, a sintering device and an air locking feeder are arranged at the top of the second melting area. The fuel is sprayed into any position of the smelting furnace according to the requirement, the combustion-supporting gas is sprayed into the discharge ends of the cooling zone and the homogenizing clarification zone, the homogenizing clarification zone is peroxide combustion, and the high-temperature combustion product enters the first melting zone and then flows into the second melting zone to be discharged through the sintering device. A portion of the bulk batch material is added at the top of the first melting zone and a portion is added at the top of the friter, and the molten glass is removed from the cooling zone. The invention can greatly save energy, protect environment, reduce investment and improve the furnace life.
Description
Technical Field
The invention relates to a glass melting furnace, in particular to a high-efficiency energy-saving environment-friendly heat exchange type external sintering glass melting furnace and a production method thereof.
Background
The existing glass melting furnace adopts the mode that raw materials are horizontally and forcibly pushed into the melting part from a breast wall, so that the raw materials can be pushed into the melting part only by high temperature at a feeding port. The fuel and the combustion-supporting gas are mixed and combusted above the material pile. The temperature of the combustion products leaving the melting section is high, particularly in heat exchange unit glass furnaces, up to 1400 ℃. The defects cause the prior glass melting furnace to have higher energy consumption, higher manufacturing cost, shorter service life and high concentration of discharged pollutants. Therefore, the present inventors have conducted research and development and industrial production practice for over ten years to overcome the above disadvantages and have granted to the present inventors 1 invention patent (environmental protection high efficiency heat exchange glass melting furnace and production method ZL201611013536.2), 1 utility model patent (environmental protection high efficiency energy saving glass melting furnace charging device ZL201821991185.7), 1 invention patent (environmental protection high efficiency energy saving heat storage exchange glass melting furnace 201811460689.0) through first examination, followed by subsequent improvements and combinations to propose the present invention.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the heat exchange type external sintering glass melting furnace and the production method thereof, wherein the heat exchange type external sintering glass melting furnace has the advantages of improving the quality of molten glass, saving energy, prolonging the furnace life, reducing pollutant discharge and lowering the manufacturing cost.
In order to achieve the purpose, the invention is configured as follows according to the requirements of different glass varieties and working conditions. 1: 1 rectangular glass homogenizing and clarifying zone with depth of 200-800 and length-width ratio of 1-10 is set. 2: 1 or more cooling zones with the depth of 200 to 400 are arranged at the discharge end of the homogenizing and clarifying zone. 3: 1 or more first melting zones with a depth of 200 to +400 are arranged through the channel at the feed end of the homogenizing and clarifying zone. 3: on the top cover of the upper part of the first melting zone, 1 or more vertical charging openings, material guiding pipes and vertical discharging devices are arranged. 4: at the feed end of the first melting zone, 1 or more second melting zones having a depth of 100 to 300 times greater than the first preliminary melting zone are arranged via channel connections. 5: and a high-temperature metal flue gas/air heat exchanger is arranged at the upper part of the second melting zone. 6: the upper part of the high-temperature metal flue gas/air heat exchanger is provided with a block glass batch air-cooled (or water-cooled) rotary tooth vertical discharger. 7: the vertical sintering device for the bulk glass batch is arranged at the upper part of the air-cooled (or water-cooled) rotary tooth vertical discharger. : 8: the top of the vertical sintering device for the bulk glass batch is provided with an air locking feeding device and a flue gas treatment and discharge device. 9: a plurality of fuel nozzles are arranged in the homogenizing and clarifying zone and the first melting zone and the second melting zone. 10: and a plurality of combustion-supporting gas nozzles are arranged at the discharge end of the homogenizing and clarifying area and the discharge end of the cooling area.
The operation of the glass melting furnace is different from that of a traditional glass melting furnace and is characterized in that: about 30 to 70 percent of the massive glass batch and the waste glass fall into the first melting area for melting through a vertical discharger arranged on a top cover inlet of the first melting area, about 30 to 70 percent of the massive glass batch and the waste glass fall into a sintering device through an air locking feeding device arranged on the upper part of the second pre-melting area for sintering and then fall into the second melting area, the massive glass batch and the waste glass flow into the first melting area after being melted and then flow into the homogenizing and clarifying area for refining to form qualified molten glass, and then flow into the cooling area for cooling and then forming. The fuel is injected into the furnace for combustion by a plurality of spray guns arranged in the homogenizing and clarifying zone, the first melting zone and the second melting zone according to requirements. The combustion-supporting gas can be air or oxygen, and is preferably air. 10 to 100 percent of combustion-supporting gas is sprayed into the cooling zone through a spray gun arranged on a breast wall at the discharge end of the cooling zone, and the cooled glass liquid enters the upper part of the homogenizing and clarifying zone to participate in combustion. 0 to 100 percent of combustion-supporting gas is sprayed into the upper part of the homogenizing and clarifying zone to participate in the combustion and heating of the glass liquid through a spray gun arranged on the breast wall at the discharging end of the homogenizing and clarifying zone. The generated 1500 ℃ high oxygen-containing flue gas flows into the first melting area and the second melting area to participate in combustion, the 1200 ℃ flue gas generated after the massive glass batch is melted enters the metal heat exchanger and the sintering device on the upper part of the second melting area to heat the massive glass batch, and then the temperature is reduced to below 150 ℃ and then the massive glass batch is discharged by the induced draft fan. The metal heat exchanger heats part of the combustion-supporting gas to 500 ℃ for combustion. Because all the flue gas directly exchanges heat with the molten glass and the glass batch in the whole process and the exhaust temperature is less than 150 ℃, the heat efficiency of the smelting furnace is greatly improved and the scale of the flue gas/combustion-supporting gas metal heat exchanger is greatly reduced.
The device is characterized in that a homogenizing clarification area with shallow pool depth is arranged, so that convection caused by density difference of molten glass is avoided or greatly reduced. The combustion-supporting gas of the whole furnace enters from the discharge end of the homogenizing and clarifying zone, so that the peroxy combustion in the homogenizing and clarifying zone can be realized. Therefore, the homogenization and clarification effects of the molten glass can be greatly improved.
The device is characterized in that a large-area shallow pool melting area with vault charging separated from the homogenization clarification area is arranged, so that the convection of molten glass and gas between the homogenization clarification area and the homogenization clarification area is avoided. The melting at 1300 ℃ can be realized, so the manufacturing cost of the melting furnace can be greatly reduced, and the furnace life can be greatly prolonged. Low nox combustion can be achieved. So the investment of the environmental protection equipment and the cost of the environmental protection operation can be reduced by more than 80 percent. In addition, the furnace is easy to be enlarged.
Comparison of technical and economic indexes of various smelting furnaces for melting common soda-lime glass
Drawings
FIG. 1 is a schematic view of the high-efficiency energy-saving environment-friendly heat exchange type furnace external sintering glass melting furnace and the production method thereof.
Detailed Description
The invention relates to a high-efficiency energy-saving environment-friendly heat exchange type external sintering glass melting furnace and a production method thereof, wherein the production method comprises the following steps: the combustion-supporting gas is air, the fuel is natural gas, and the soda-lime glass is melted.
Specifically, as shown in (fig. 1): homogenization clarification zone 1. A first melting zone 2. A second melting zone 3. A channel 4. A cooling zone 5. Top cap feeder 6. And a natural gas nozzle 7. Air jets 8. A metal heat exchanger 9. An air-cooled rotary-tooth vertical discharger 10. And a sintering device 11. An air-locking feeder 12. A flue gas outlet 13.
Claims (5)
1. An efficient energy-saving environment-friendly heat exchange type external sintering glass melting furnace and a production method thereof are disclosed: comprises a smelting furnace consisting of a rectangular homogenizing and clarifying zone with the length-width ratio of 1 to 10, a first melting zone and a second melting zone, 1 or more cooling zones arranged at the discharge end of the homogenizing and clarifying zone, 1 first melting zone arranged at the feed end of the homogenizing and clarifying zone and connected by a passage, 1 second melting zone arranged at the feed end of the first melting zone and connected by a passage, a plurality of fuel nozzles arranged at the homogenizing and clarifying zone, a plurality of combustion-supporting gas nozzles arranged at the discharge end of the cooling zone and the discharge end of the homogenizing and clarifying zone, 1 or more vertical glass batch inlets arranged on a top cover of the first melting zone, a metal fume/air heat exchanger arranged at the upper part of the second melting zone, a rotary tooth vertical discharger arranged at the upper part of the metal fume/air heat exchanger, and a sintering device arranged on the rotary tooth vertical discharger, a bulk glass batch airlock feeder and a flue gas exhaust port arranged on the sintering device.
The structure and the operation characteristics of the glass melting furnace are different from those of the traditional glass melting furnace: a portion of the bulk or powdered glass batch material falls freely from the feed opening or openings in the top cover of the first melting zone into the first melting zone where it is melted. And the other part of the blocky glass batch is continuously added into a sintering device by 1 or more air locking feeding devices at the top of the second melting area to absorb heat for 1 to 3 hours to 650 ℃ for sintering, the sintered blocky glass batch continuously and vertically falls into the second melting area through a rotary tooth vertical discharger to be melted, flows into the first melting area and then flows into a homogenizing and clarifying area to be refined into high-quality molten glass by a high-temperature oxidation method, and then flows into a cooling pool to be cooled to about 1200 ℃ by combustion-supporting gas for forming. The fuel is injected from the homogenizing and clarifying zone and the first melting zone and the second melting zone according to the requirement. The combustion-supporting gas can be air or oxygen, and is preferably air. One part of combustion-supporting gas is sprayed in through a breast wall arranged at the discharge end of a cooling area, the cooled glass liquid enters the upper part of a homogenizing and clarifying area to participate in combustion, the other part of combustion-supporting gas is sprayed in the homogenizing and clarifying area to participate in combustion through the discharge end arranged at the discharge end of the homogenizing and clarifying area, the generated high-temperature oxygen-containing flue gas enters a first melting area and a second melting area to participate in combustion, the generated low-oxygen-containing flue gas heats the massive glass batch mixture and then is cooled to 1200 ℃, then enters a metal flue gas/air heat exchanger at the upper part to be cooled to 700 ℃, then enters a sintering device through a vertical discharger with rotating teeth to heat the massive glass batch and is cooled to below 150 ℃. All the flue gas directly contacts with the glass liquid and the glass batch in the whole process.
2. The glass melting furnace of claim 1, wherein the bulk glass batch high temperature air cooled rotary tooth vertical discharger provided with the upper part of the high temperature metal air heat exchanger is provided with a plurality of air cooled rotary tooth pipes. Cooling air enters from one end of the rotary toothed pipe, one part of the cooling air is discharged from the other end of the rotary toothed pipe and enters a cooling air box of the sintering device, the other part of the cooling air is sprayed into the high-temperature air-cooled rotary tooth vertical discharger from the tail end of the tooth, and the temperature of the flue gas is reduced by about 100 ℃ while the rotary toothed pipe is cooled.
3. The glass melting furnace according to claim 1, wherein the lump glass batch sintering device disposed at the upper portion of the high temperature air-cooled rotary tooth vertical discharger has a vertical structure with a lower portion air-cooled, an exhaust hot air is used as combustion air, an air-locked lump material feeder is disposed at the top, a flue gas outlet and an induced draft fan are disposed at the side of the upper portion, and the total residence time of the charged lump glass batch is 1 to 3 hours.
4. The glass melting furnace of claim 1, wherein the fuel nozzles are separated from the combustion-supporting gas nozzles, the combustion-supporting gas is provided at the discharge end of the cooling zone and the discharge end of the homogenizing and clarifying zone, the plurality of fuel nozzles are provided at any position of the furnace as required, the temperature and atmosphere of each part are controlled by adjusting the total amount of the combustion-supporting gas and adjusting the fuel amount of each part respectively, the homogenizing and clarifying zone is in a peroxide combustion state, and the last group of fuel guns burn off oxygen, thereby realizing the desulfurization and denitrification in the high-efficiency low-cost ammonia-free alkali-free furnace without affecting melting.
5. The glass melting furnace of claim 1, wherein the first melting zone has a bath depth of 0 to 200, the second melting zone is elevated from 100 to 200 above the bath depth of the first melting zone, the homogenizing clarifier has a bath depth of 200 to 800, and the cooling bath has a bath depth of 200 to 400.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911426836.7A CN111087164A (en) | 2019-12-27 | 2019-12-27 | High-efficiency energy-saving environment-friendly heat exchange type external sintering glass melting furnace and production method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911426836.7A CN111087164A (en) | 2019-12-27 | 2019-12-27 | High-efficiency energy-saving environment-friendly heat exchange type external sintering glass melting furnace and production method |
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| CN111087164A true CN111087164A (en) | 2020-05-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113354257A (en) * | 2021-05-12 | 2021-09-07 | 卢爱民 | Energy-saving environment-friendly direct-heating type external preheating glass melting furnace and production method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201338983Y (en) * | 2008-11-13 | 2009-11-04 | 中国新型建筑材料工业杭州设计研究院 | Fume preheating equipment for glass batch pure oxygen combustion melting furnace |
| CN104909541A (en) * | 2015-05-25 | 2015-09-16 | 秦皇岛玻璃工业研究设计院 | Glass melting furnace and glass melting method |
| CN106698896A (en) * | 2016-11-18 | 2017-05-24 | 卢爱民 | Environment-friendly, highly-efficient and heat-exchangeable glass melting furnace and production method |
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2019
- 2019-12-27 CN CN201911426836.7A patent/CN111087164A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201338983Y (en) * | 2008-11-13 | 2009-11-04 | 中国新型建筑材料工业杭州设计研究院 | Fume preheating equipment for glass batch pure oxygen combustion melting furnace |
| CN104909541A (en) * | 2015-05-25 | 2015-09-16 | 秦皇岛玻璃工业研究设计院 | Glass melting furnace and glass melting method |
| CN106698896A (en) * | 2016-11-18 | 2017-05-24 | 卢爱民 | Environment-friendly, highly-efficient and heat-exchangeable glass melting furnace and production method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113354257A (en) * | 2021-05-12 | 2021-09-07 | 卢爱民 | Energy-saving environment-friendly direct-heating type external preheating glass melting furnace and production method thereof |
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Application publication date: 20200501 |