CN101625112B - System for heating batch by utilizing secondary waste heat of float glass furnace - Google Patents
System for heating batch by utilizing secondary waste heat of float glass furnace Download PDFInfo
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- CN101625112B CN101625112B CN2009100603756A CN200910060375A CN101625112B CN 101625112 B CN101625112 B CN 101625112B CN 2009100603756 A CN2009100603756 A CN 2009100603756A CN 200910060375 A CN200910060375 A CN 200910060375A CN 101625112 B CN101625112 B CN 101625112B
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Abstract
The invention relates to the technical field of waste heat utilization of a float glass furnace, aiming at solving the technical problems which are present during the operation of waste heat generation systems of the traditional float glass furnaces, such as low recovery rate of waste heat, severe environmental pollution caused by emission of smoke containing a large amount of dust, unstable system operation and the like. A smoke outlet of the float glass furnace of the invention is communicated with a smoke inlet of a waste heat boiler; a smoke outlet of the waste heat boiler is communicated with an inlet of a waste heat draft fan; an outlet of the waste heat draft fan is communicated with an inlet of a rotary dryer through a flue, a charging hole is arranged above the inlet of the rotary dryer, an outlet of the rotary dryer is provided with a downward material outlet end and an upward flue respectively; the upward flue is communicated with a helical conveyor above which a dust collector is arranged; a discharge hole of the helical conveyor and a material outlet end of the rotary dryer are connected with a kiln head feeding bin, and a smoke outlet of the helical conveyor is communicated with a system draft fan and a chimney. The invention is suitable for the waste heat utilization of the float glass furnace.
Description
Technical field
The present invention relates to glass melter UTILIZATION OF VESIDUAL HEAT IN technical field, particularly a kind of system for heating batch that utilizes float glass smelting kiln boiler waste gas waste heat.
Background technology
The energy consumption of commercial run is based on fuel and electric power, and the utilization ratio of fuel has a large amount of complementary energy and produces between 30～40% usually, and most of complementary energy exists with the form of waste gas residual heat.As the waste gas residual heat resource not being recycled, not only can waste energy, but also contaminate environment.Utilize the waste gas residual heat Resources Construction cogeneration station of commercial run, and the energy that meets country's promotion that utilizes again of realizing cogeneration waste discharge flue gas on this basis repeats to utilize policy again, realize " turning waste into wealth ", be an energy-conserving and environment-protective comprehensive utilization technique transformation project, its economic benefit, environmental benefit and social benefit are very remarkable.
The Glass Melting Furnace Design of glass industry is used fuel such as heavy oil, Sweet natural gas, coal gas, and fuel is discharged from outside the kiln at the flue gas that the stove internal combustion forms, and has promptly produced the waste gas residual heat resource.Warm waste gas residual heat during glass melter waste gas belongs to, temperature is 450～550 ℃, and exhaust gas flow is less, and hot grade is lower, and the recovery of heat cost is bigger; The parameter of waste gas residual heat (temperature, flow, pressure) has certain fluctuation, and fluctuation range is big; The construction scale of most glasswories wall scroll glass production line is little, and the waste heat of glass kiln is more limited comparatively speaking, and the investment of cogeneration project relative unit is big, and the investment repayment cycle is long; The scale of glass melter waste gas residual heat resource is more less relatively than cement industry, at present, glass industry mainly adopts the recovery approach of thermal utilization both at home and abroad, be to utilize waste heat boiler to be used to produce saturation steam, offer the heavy oil heating or bear the heating thermal load, or the supporting low-temp low-pressure device for generating power by waste heat of small-scale, its efficiency of utilization and power generation assembly efficient are low, system stability is poor, and the flue-gas temperature of the waste discharge of waste heat boiler is at 230～250 ℃ usually, and utilization rate of waste heat has only 30～40%.And in fact, the smoke discharging residual heat utilization ratio of glass kiln can reach 65～80%.
Summary of the invention
Technical problems such as the heat recovery rate that the present invention is intended to solve the existence in service of traditional float glass smelting kiln afterheat generating system fume emission environmental pollution low, that contain a large amount of dust is serious, system's fluctuation of service can be carried out twice to the glass melter fume afterheat fully effectively second stage employ, heat recovery rate height, fume emission reach environmental protection standard, the stable system for heating batch by utilizing secondary waste heat of float glass furnace of system to be provided a kind of.
The objective of the invention is to be achieved through the following technical solutions:
System for heating batch by utilizing secondary waste heat of float glass furnace of the present invention, wherein the flue gas discharge opening of glass melter 16 interlinks by the gas approach of exhaust pass 25 with waste heat boiler, and the exhanst gas outlet of waste heat boiler is connected with frequency conversion induced draft fan 15; The import of the outlet of frequency conversion induced draft fan 15 and waste heat induced draft fan 38 interlinks, the outlet of waste heat induced draft fan 38 interlinks by the import of flue and rotary drying machine 34, the import top of rotary drying machine 34 is provided with hopper 37, the feeding port of lift 36 and hopper 37 join, the outlet of rotary drying machine 34 is arranged with downward admixtion exit end and the flue that makes progress, the flue upwards and the gas approach of worm conveyor 41 interlink, dust-precipitator 32 is located at the top of worm conveyor 41, the discharge port of worm conveyor 41, the admixtion exit end of rotary drying machine 34 and the kiln hood storehouse 40 that feeds intake joins, the import of the exhanst gas outlet of worm conveyor 41 and system's induced draft fan 31 interlinks, and the outlet of system's induced draft fan 31 connects the serial connection flue gas and discharges flue 43, induced draft fan exports electronic dish valve 42 and chimney 17.
System for heating batch by utilizing secondary waste heat of float glass furnace of the present invention, wherein said exhaust pass 25 is a Y-tube, its one section middle part that connects the flue gas discharge opening of glass melter 16 is provided with variable valve 18, its one section middle part that connects chimney 17 is provided with flue collector slide valve 19, and its one section middle part that connects the exhaust-heat boiler flue gas import is provided with the electronic dish valve 20 of boiler inlet.
System for heating batch by utilizing secondary waste heat of float glass furnace of the present invention, it is 3 °～5 ° that wherein said rotary drying machine 34 is installed level inclination, its entrance end is higher than exit end.
System for heating batch by utilizing secondary waste heat of float glass furnace of the present invention, wherein said rotary drying machine 34 working speeds are 3～5rpm, and input gas temperature is 130～190 ℃, and the admixtion residence time is 35～50min.
System for heating batch by utilizing secondary waste heat of float glass furnace of the present invention, lead on the pipeline between the outlet of wherein said frequency conversion induced draft fan 15 and the chimney 17 by-pass flue 27 is arranged, be provided with the electronic dish valve 21 of flue outlet between by-pass flue 27 and the chimney 17, by-pass flue 27 is provided with bypass electric butterfly valve 24, and atmosphere is directly led in 24 outlets of bypass electric butterfly valve.
System for heating batch by utilizing secondary waste heat of float glass furnace of the present invention, wherein said frequency conversion induced draft fan 15 are two frequency conversion induced draft fans in parallel, and its blast inlet is equipped with the electronic dish valve 22 of induced draft fan import, and air outlet is equipped with induced draft fan and exports electronic dish valve 23.
System for heating batch by utilizing secondary waste heat of float glass furnace of the present invention, wherein said waste heat boiler are that single drum ∏ type is arranged waste heat boiler.
The beneficial effect of system for heating batch by utilizing secondary waste heat of float glass furnace of the present invention:
1. can carry out fully effectively second stage employ twice to the glass melter fume afterheat, comprise that the first thermal power transfer operation utilizes waste heat boiler to carry out the flue gas energy recovery, be used for cogeneration; The flue gas that the second thermal power transfer operation then will be discharged after the first thermal power transfer operation carries out heat energy utilization once more, is used for admixtion heating, makes that flue-gas temperature further reduces, dust content further reduces;
2. adopt two step thermal power transfer operations, significantly improve the heat recovery rate;
3. after two step thermal power transfer operations, the temperature of fume emission and dustiness all can reach national environmental standard;
4. utilize the generating of glass melter waste heat waste gas and, reduced the production running cost, improved working efficiency the admixtion heating;
5. system is stable;
6. applicable to all float glass melting tank afterheat boiler systems.
Description of drawings
Fig. 1 is a system architecture synoptic diagram of the present invention
The number in the figure explanation:
9 waste heat boilers, 15 frequency conversion induced draft fans, 16 glass melters, 17 chimneys, 18 intermediate regulations valves, 19 flue collector slide valves, the electronic dish valve of 20 boiler inlets, the electronic dish valve of 21 flue outlets, the electronic dish valve of 22 induced draft fan imports, 23 induced draft fans export electronic dish valve, 24 bypass electric butterfly valves, 25 exhaust pass, 27 by-pass flues, 28 recirculated waters inlet, 29 vapour outlets, 31 system's induced draft fans, 32 dust-precipitators, 34 rotary drying machines, 35 admixtiones, 36 lifts, 37 hoppers, 38 waste heat induced draft fans, 39 flues, the 40 kiln hoods storehouse that feeds intake, 41 worm conveyors, 42 induced draft fans export electronic dish valve, 43 flue gases are discharged flue
Embodiment
Detailed structure of the present invention, application principle, effect and effect are illustrated by following embodiment with reference to accompanying drawing 1.
System for heating batch by utilizing secondary waste heat of float glass furnace of the present invention, wherein the flue gas discharge opening of glass melter 16 arranges that by exhaust pass 25 and single drum ∏ type the gas approach of waste heat boiler interlinks, and the exhanst gas outlet of waste heat boiler is connected with frequency conversion induced draft fan 15; Frequency conversion induced draft fan 15 is two frequency conversion induced draft fans in parallel, its blast inlet is equipped with the electronic dish valve 22 of induced draft fan import, air outlet is equipped with induced draft fan and exports electronic dish valve 23,15 outlets of frequency conversion induced draft fan interlink by the import of by-pass flue 27 with waste heat induced draft fan 38, be provided with the electronic dish valve 21 of flue outlet between by-pass flue 27 and the chimney 17, by-pass flue 27 is provided with bypass electric butterfly valve 24, and atmosphere is directly led in 24 outlets of bypass electric butterfly valve.
The outlet of waste heat induced draft fan 38 interlinks by the import of flue and rotary drying machine 34, the import top of rotary drying machine 34 is provided with hopper 37, the feeding port of lift 36 and hopper 37 join, the outlet of rotary drying machine 34 is arranged with downward admixtion exit end and the flue that makes progress, the flue upwards and the gas approach of worm conveyor 41 interlink, dust-precipitator 32 is located at the top of worm conveyor 41, the discharge port of worm conveyor 41, admixtion 35 exit end of rotary drying machine 34 and the kiln hood storehouse 40 that feeds intake joins, the import of the exhanst gas outlet of worm conveyor 41 and system's induced draft fan 31 interlinks, and the outlet of system's induced draft fan 31 connects the serial connection flue gas and discharges flue 43, induced draft fan exports electronic dish valve 42 and chimney 17.
Exhaust pass 25 is a Y-tube, its one section middle part that connects the flue gas discharge opening of glass melter 16 is provided with variable valve 18, its one section middle part that connects chimney 17 is provided with flue collector slide valve 19, and its one section middle part that connects the exhaust-heat boiler flue gas import is provided with the electronic dish valve 20 of boiler inlet.
It is 3 °～5 ° that rotary drying machine 34 is installed level inclination, and its entrance end is higher than exit end, and working speed is 3～5rpm, and input gas temperature is 130～190 ℃, and the admixtion residence time is 35～50min.
Below by concrete workflow the present invention is further described:
The temperature of being discharged by glass melter 16 is that 450～550 ℃ flue gas enters in the waste heat boiler 9 through waste heat boiler 9 gas approachs earlier, carry out the first thermal power transfer operation therein, recirculated water in the waste heat boiler 9 is heated, steam after the heating is outwards carried by the vapour outlet 29 of waste heat boiler 9, is used for cogeneration or heating etc.; Flue gas after the first thermal power transfer operation is delivered to waste heat induced draft fan 38 by frequency conversion induced draft fan 15, sends into rotary drying machine 34 by waste heat induced draft fan 38 again, and this moment, flue-gas temperature was reduced to about 165 ℃.
Below enter the second thermal power transfer operation: admixtion to be heated is evenly sent into the hopper mouth 37 of efficient rotary drying machine 34 through chapelet 36, when admixtion and waste heat waste discharge flue gas when a higher end enters efficient rotary drying machine 34, rotation along with efficient rotary drying machine 34 cylinders, admixtion runs to a lower end from a higher end under the effect of gravity and rotary drying machine 34 internal helical blades, in operational process, admixtion is kicked up by the material delivering plate in the rotary drying machine 34 and is fully contacted with hot flue gas, directly obtain the heat of giving of cogeneration waste discharge flue gas, in order to improve thermo-efficiency, the internal structure of dryer is used multi-channel type, the diameter (Ф 2.4m) that suitably adds large cylinder, guarantee that admixtion has enough residence time in dryer, admixtion and flue gas can fully carry out heat exchange, the rotating speed that efficient rotary drying machine is set is 3～5rpm, about 45min of the residence time of admixtion in dryer, the spent air temperture that goes out dryer is about 110 ℃, the admixtion temperature that goes out dryer is 105～115 ℃, finally finish admixtion heat-processed, admixtion 35 draws off from exit end and enters the kiln hood storehouse 40 that feeds intake then, useless simultaneously flue gas go out efficient rotary drying machine 34 after bag filter 32 gather dust handle after, enter flue gas behind the cogeneration unit again and discharge flue 43 and enter chimney 17 dischargings.The powder that dust-precipitator 32 takes down is together delivered to the kiln hood storehouse 40 that feeds intake by the admixtion 35 after worm conveyor 41 and the preheating, and kiln hood storehouse 40 outer walls that feed intake are established thermal insulation layer, to reduce heat-energy losses.
Waste heat boiler exerts an influence to furnace pressure as flue gas pressures when startup and emergency, then closes bypass electric butterfly valve 24, opens the electronic dish valve 21 of flue outlet, and flue gas directly passes through chimney 17 to airborne release.Also can open flue collector slide valve 19, and close the electronic dish valve 20 of boiler inlet, the electronic dish valve 21 of flue outlet and induced draft fan simultaneously and export electronic dish valve 42, then the flue gas of discharging by glass melter 16 directly by chimney 17 to airborne release.
When a boiler induced-draft fan 15 breaks down can not move the time,, guarantee the normal operation of waste heat boiler and the ordinary production of float glass smelting kiln with opening another standby induced draft fan.
From the above, system for heating batch by utilizing secondary waste heat of float glass furnace of the present invention, can can carry out fully effectively second stage employ twice to the glass melter fume afterheat, comprise that the first thermal power transfer operation utilizes waste heat boiler to carry out the flue gas energy recovery, be used for cogeneration; The flue gas that the second thermal power transfer operation then will be discharged after the first thermal power transfer operation carries out heat energy utilization once more, is used for admixtion and heats, and makes that flue-gas temperature further reduces, dust content further reduces; Heat recovery rate height, fume emission can reach national environmental standard, reduce the production running cost of glass melter, have characteristics such as system is stable simultaneously.Native system is applicable to the UTILIZATION OF VESIDUAL HEAT IN of all float glass smelting kilns.
Claims (7)
1. system for heating batch by utilizing secondary waste heat of float glass furnace is characterized in that: the flue gas discharge opening of glass melter (16) interlinks by the gas approach of exhaust pass (25) with waste heat boiler, and the exhanst gas outlet of waste heat boiler is connected with frequency conversion induced draft fan (15); The import of the outlet of frequency conversion induced draft fan (15) and waste heat induced draft fan (38) interlinks, the outlet of waste heat induced draft fan (38) interlinks by the import of flue and rotary drying machine (34), the import top of rotary drying machine (34) is provided with hopper (37), the feeding port of lift (36) and hopper (37) join, the outlet of rotary drying machine (34) is arranged with downward material outlet end and the flue that makes progress, the flue upwards and the gas approach of worm conveyor (41) interlink, dust-precipitator (32) is located at the top of worm conveyor (41), the discharge port of worm conveyor (41), the material outlet end of rotary drying machine (34) and the kiln hood storehouse (40) that feeds intake joins, the import of the exhanst gas outlet of worm conveyor (41) and system's induced draft fan (31) interlinks, and the outlet of system's induced draft fan (31) connects the serial connection flue gas and discharges flue (43), induced draft fan exports electronic dish valve (42) and chimney (17).
2. system for heating batch by utilizing secondary waste heat of float glass furnace as claimed in claim 1, it is characterized in that: described exhaust pass (25) is a Y-tube, its one section middle part that connects the flue gas discharge opening of glass melter (16) is provided with variable valve (18), its one section middle part that connects chimney (17) is provided with flue collector slide valve (19), and its one section middle part that connects the exhaust-heat boiler flue gas import is provided with the electronic dish valve of boiler inlet (20).
3. system for heating batch by utilizing secondary waste heat of float glass furnace as claimed in claim 1 is characterized in that: it is 3 °～5 ° that described rotary drying machine (34) is installed level inclination, and its entrance end is higher than exit end.
4. system for heating batch by utilizing secondary waste heat of float glass furnace as claimed in claim 1 is characterized in that: described rotary drying machine (34) working speed is 3～5rpm, and input gas temperature is 130～190 ℃, and residence time of material is 35～50min.
5. system for heating batch by utilizing secondary waste heat of float glass furnace as claimed in claim 1, it is characterized in that: leading on the pipeline between the outlet of described frequency conversion induced draft fan (15) and the chimney (17) has by-pass flue (27), frequency conversion induced draft fan (15) outlet interlinks by the import of this by-pass flue (27) with waste heat induced draft fan (38), be provided with the electronic dish valve of flue outlet (21) between by-pass flue (27) and the chimney (17), by-pass flue (27) is provided with bypass electric butterfly valve (24), and atmosphere is directly led in bypass electric butterfly valve (24) outlet.
6. system for heating batch by utilizing secondary waste heat of float glass furnace as claimed in claim 1, it is characterized in that: described frequency conversion induced draft fan (15) is two frequency conversion induced draft fans in parallel, its blast inlet is equipped with the electronic dish valve of induced draft fan import (22), and air outlet is equipped with induced draft fan and exports electronic dish valve (23).
7. system for heating batch by utilizing secondary waste heat of float glass furnace as claimed in claim 1 is characterized in that: described waste heat boiler is that single drum ∏ type is arranged waste heat boiler.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100603756A CN101625112B (en) | 2009-08-18 | 2009-08-18 | System for heating batch by utilizing secondary waste heat of float glass furnace |
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| CN2009100603756A CN101625112B (en) | 2009-08-18 | 2009-08-18 | System for heating batch by utilizing secondary waste heat of float glass furnace |
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| CN101625112A CN101625112A (en) | 2010-01-13 |
| CN101625112B true CN101625112B (en) | 2011-05-11 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104230145B (en) * | 2013-06-21 | 2016-08-10 | 上海一鼎重型矿山设备制造有限公司 | Use waste gas heated type pellet heating system |
| CN104279858A (en) * | 2014-10-21 | 2015-01-14 | 无锡华中科技有限公司 | Feeding device with drying barrel |
| CN112340986A (en) * | 2020-12-04 | 2021-02-09 | 信和光能(安徽)有限公司 | Glass kiln dust removal powder recovery unit |
| CN116332476A (en) * | 2021-12-24 | 2023-06-27 | 山东岱荣节能环保科技有限公司 | System for recovering waste heat of flue gas of glass kiln and using method |
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| EP0437679A1 (en) * | 1989-11-29 | 1991-07-24 | Deutsche Babcock Anlagen Gmbh | Process for the treatment of ash in incinerator plants and an incinerator plant for this process |
| CN101066846A (en) * | 2007-05-30 | 2007-11-07 | 崔付林 | Technological process of using fume afterheat of cement kiln in preheating and humidifying raw material |
| CN101318762A (en) * | 2007-06-07 | 2008-12-10 | 秦皇岛玻璃工业研究设计院 | Float glass batches pelletizing and pre-heating energy efficient technology |
| CN101328005A (en) * | 2008-07-16 | 2008-12-24 | 中国建材国际工程有限公司 | Preheating method and apparatus for glass batch |
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2009
- 2009-08-18 CN CN2009100603756A patent/CN101625112B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0437679A1 (en) * | 1989-11-29 | 1991-07-24 | Deutsche Babcock Anlagen Gmbh | Process for the treatment of ash in incinerator plants and an incinerator plant for this process |
| CN101066846A (en) * | 2007-05-30 | 2007-11-07 | 崔付林 | Technological process of using fume afterheat of cement kiln in preheating and humidifying raw material |
| CN101318762A (en) * | 2007-06-07 | 2008-12-10 | 秦皇岛玻璃工业研究设计院 | Float glass batches pelletizing and pre-heating energy efficient technology |
| CN101328005A (en) * | 2008-07-16 | 2008-12-24 | 中国建材国际工程有限公司 | Preheating method and apparatus for glass batch |
Non-Patent Citations (1)
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| 刘晓勇,刘贵海,王永纯.利用窑炉烟气余热预热玻璃配合料.《玻璃》.2004,(第177期), * |
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