CN209853984U - Combustion type glass tempering heating device - Google Patents
Combustion type glass tempering heating device Download PDFInfo
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- CN209853984U CN209853984U CN201920399573.4U CN201920399573U CN209853984U CN 209853984 U CN209853984 U CN 209853984U CN 201920399573 U CN201920399573 U CN 201920399573U CN 209853984 U CN209853984 U CN 209853984U
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Abstract
The utility model provides a combustion formula glass tempering heating device, includes furnace body, glass conveying system, combustor, heat exchanger, water conservancy diversion piece, the inside heat preservation that has of furnace body, a plurality of combustors of furnace body connection, combustor evenly distributed is on the furnace body, the combustor includes some firearm, metal mesh, fuel inlet, air intlet, mixing chamber, water conservancy diversion piece, the furnace body is connected to the mixing chamber outside, mixing chamber internal connection water conservancy diversion piece, the metal mesh is connected to the mixing chamber inner end, some firearm is connected in the metal mesh outside, mixing chamber middle part connection fuel inlet, fuel inlet outer end connection fuel pipe way, the mixing chamber outer end has air intlet, air intlet outer end connection air pipeline, air pipeline right-hand member connects the lower left end of heat exchanger, the upper right end of heat exchanger introduces the air, the furnace body includes first furnace body, the lower extreme of air pipe way, the air, And a second furnace body.
Description
Technical Field
The utility model relates to a glass tempering field especially relates to a burning formula glass tempering heating device.
Background
At present, heating furnaces in flat glass toughening equipment adopt an electric heating mode. Electric energy belongs to secondary energy, and the electric energy of China mainly takes thermal power as main energy, and is converted from chemical energy of fuel into heat energy, then converted from heat energy into mechanical energy, and finally converted from mechanical energy into electric energy. The electric heating is to convert electric energy into heat energy, and is to convert high-grade energy into low-grade energy, which is unreasonable from the energy utilization point of view. Meanwhile, the heating wires and the accessory equipment required by the high-power electric heating device have high cost, so that the total cost of the equipment is increased.
Natural gas is a primary energy source, is mixed with air and then is combusted to generate heat energy, and can be directly used for heating glass by a heating furnace. Patent CN1583615 discloses a glass tempering heating furnace with a heat storage combustion heating mode, but the accessory equipment for heat storage combustion is complex and large in size, and is not suitable for small and medium-sized furnaces such as glass tempering heating furnaces. Patent CN101734844 discloses an energy-saving flue gas full-convection heating glass tempering furnace, which is characterized in that a waste heat recovery system is added, but the convection mode adopts high-temperature flue gas jet impact heat exchange, and uniform heating can be realized only by dense arrangement of a large number of nozzles. Patent CN20621943U discloses a forced convection heat transfer glass tempering heating furnace, which is characterized in that a centrifugal fan in the furnace is used to enhance the flow of flue gas in the furnace, but the arrangement of the centrifugal fan and a pipeline in the furnace can increase the volume of a hearth, resulting in the increase of heat dissipation loss.
SUMMERY OF THE UTILITY MODEL
The utility model provides a combustion type glass tempering heating device which improves the heat recovery rate aiming at the defects existing in the prior art.
The utility model aims at realizing through the following technical scheme:
the utility model provides a combustion formula glass tempering heating device, includes furnace body, glass conveying system, combustor, heat exchanger, water conservancy diversion piece, the inside heat preservation that has of furnace body, a plurality of combustors of furnace body connection, combustor evenly distributed is on the furnace body, the combustor includes some firearm, metal mesh, fuel inlet, air intlet, mixing chamber, water conservancy diversion piece, the furnace body is connected to the mixing chamber outside, mixing chamber internal connection water conservancy diversion piece, the metal mesh is connected to the mixing chamber inner end, some firearm is connected in the metal mesh outside, mixing chamber middle part connection fuel inlet, fuel inlet outer end connection fuel pipe way, the mixing chamber outer end has air intlet, air intlet outer end connection air pipeline, air pipeline right-hand member connects the lower left end of heat exchanger, the upper right end of heat exchanger introduces the air, the furnace body includes first furnace body, the lower extreme of air pipe way, the air, A glass conveying system is arranged between the first furnace body and the second furnace body; the first furnace body sub-unit connection flue gas return line, the low reaches furnace gate is connected to the second furnace body left end, second furnace body right-hand member connection flue, the upper reaches furnace gate is connected to the right lower part of flue, heat exchanger right side lower part is connected on flue upper portion, the flue gas pipeline is connected on the upper left portion of heat exchanger, flue gas return line is connected to the flue gas pipeline.
Glass conveying system divide into horizontal tempering furnace conveying system, vertical tempering furnace conveying system, horizontal tempering furnace conveying system includes the roll table, the roll table is located the furnace body middle part, the roll table horizontal distribution, glass is connected to the roll table upside, vertical tempering furnace conveying system is including hanging the mechanism, hang the mechanism in groups, opposition distribution in vertical direction, hang the inboard glass of connecting of mechanism.
Has the advantages that:
the furnace body is provided with a heat-insulating layer, an upstream furnace door and a downstream furnace door and is used for maintaining the high-temperature environment in the furnace. The glass conveying system is divided into two types, the conveying system of the horizontal toughening furnace is a ceramic roller way, and the conveying system of the vertical toughening furnace is of a hanging structure. The burner is a metal fiber burner, and the fuel is natural gas, coal gas, liquefied gas and other gas fuels. The method is characterized in that the combustion is stable, flame is stabilized by metal fibers, special nozzles are not needed, the arrangement number of the burners can be selected according to actual requirements, and the burners are positioned at the downstream of the heating furnace. The glass softening temperature is 500-600 ℃, the furnace temperature needs to be kept at 700-800 ℃, and the combustion temperature is controlled at 900-1000 ℃. Because the glass 20 is only required to be in an oxidation environment in the toughening process, an oxygen-enriched combustion mode with the equivalence ratio of about 0.7 is adopted. The guide vane is positioned at the upstream of the combustor and used for limiting high-temperature flue gas to flow near the surface of the glass, so that the flow velocity of the flue gas is increased, and the convective heat transfer coefficient is improved. The flue gas generated by the burner is guided by the guide vane in the furnace, flows upstream in the direction opposite to the glass movement direction at the downstream of the heating furnace, and is finally discharged through the flue. The flue gas flow mode can form the low reaches high temperature, the low temperature distribution of upper reaches in the stove, and glass heats up gradually in the transportation process in the stove, both can avoid the glass deformation that the sharp heat leads to, can realize thermal cascade again. The exhaust gas temperature of the glass tempering heating furnace is about 150-200 ℃, and the water vapor in the exhaust gas is prevented from condensing in the furnace. The heat exchanger is a condensing heat exchanger, and exchanges heat between air required by combustion and the discharged flue gas, and the temperature of the flue gas after heat exchange is about 50 ℃. At the moment, the water vapor in the flue gas is condensed, so that the latent heat of the water vapor can be recovered, and the heat recovery rate is improved. The air heated by the heat exchanger is mixed with the high-temperature flue gas led out from the furnace, the heat of the flue gas is recycled, the air temperature is increased, and the oxygen concentration in the air is reduced. The mode ensures stable and efficient combustion and reduces the emission of nitrogen oxides and carbon monoxide.
Drawings
Fig. 1 is the structure schematic diagram of the conveying system of the horizontal tempering furnace of the utility model.
Fig. 2 is the structure schematic diagram of the conveying system of the vertical tempering furnace.
Fig. 3 is a schematic structural view of the burner and the metal mesh of the present invention.
The furnace comprises a combustor 1, a fuel pipeline 2, an air pipeline 3, a flue gas pipeline 4, a heat exchanger 5, a flue 6, an upstream furnace door 7, a roller way 8, a flue gas return pipeline 9, a first furnace body 10, a downstream furnace door 11, a second furnace body 12, an igniter 13, a metal mesh 14, a fuel inlet 15, an air inlet 16, a mixing chamber 17, a flow deflector 18, a hanging mechanism 19 and glass 20.
Detailed Description
The invention is explained in more detail below with reference to the figures and examples:
the utility model provides a combustion type glass tempering heating device, includes furnace body, glass conveying system, combustor 1, heat exchanger 5, water conservancy diversion piece 18, the inside heat preservation that has of furnace body, a plurality of combustors 1 of furnace body connection, combustor 1 evenly distributed is on the furnace body, combustor 1 includes some firearm 13, metal mesh 14, fuel inlet 15, air intlet 16, mixing chamber 17, water conservancy diversion piece 18, the furnace body is connected in the mixing chamber 17 outside, mixing chamber 17 internal connection water conservancy diversion piece 18, mixing chamber 17 inner connection metal mesh 14, metal mesh 14 outside tie point firearm 13, fuel inlet 15 is connected in the mixing chamber 17 middle part, fuel inlet 15 outer end connection fuel pipe 2, mixing chamber 17 outer end has air intlet 16, air intlet 16 outer end connection air pipeline 3, the air pipeline 3 right-hand member connects the heat exchanger 5 left end lower extreme, air is introduced into the upper right end of the heat exchanger 5, the furnace body comprises a first furnace body 10 and a second furnace body 12, and a glass conveying system is arranged between the first furnace body 10 and the second furnace body 12; the furnace comprises a first furnace body 10, a second furnace body 12, a first furnace door 11, a second furnace body 12, a second furnace body 6, a first furnace door 7, a second furnace door 6, a heat exchanger 5, a first flue 4, a second flue 4, a first flue return pipeline 9, a second flue door 11, a second flue door 6.
Glass conveying system divide into horizontal tempering furnace conveying system, vertical tempering furnace conveying system, horizontal tempering furnace conveying system includes roll table 8, roll table 8 is located the furnace body middle part, 8 horizontal distributions of roll table, 8 upsides on the roll table connect glass 20, vertical tempering furnace conveying system is including hanging mechanism 19, it distributes in groups, opposition in vertical direction to hang mechanism 19, hang 19 inboard connection glass 20 of mechanism.
The furnace body is provided with a heat-insulating layer, an upstream furnace door 7 and a downstream furnace door 11 and is used for keeping a high-temperature environment in the furnace. The glass conveying system is divided into two types, the conveying system of the horizontal toughening furnace is a ceramic roller way 8, and the conveying system of the vertical toughening furnace is of a hanging structure. The combustor 1 is a metal fiber combustor, and the fuel is natural gas, coal gas, liquefied gas and other gas fuels. The method is characterized in that the combustion is stable, flame is stabilized by metal fibers, special nozzles are not needed, the arrangement number of the burners 1 can be selected according to actual requirements, and the burners 1 are positioned at the downstream of a heating furnace. The softening temperature of the glass 20 is between 500 and 600 ℃, the furnace temperature needs to be kept between 700 and 800 ℃, and the combustion temperature is controlled to be 900 to 1000 ℃. Because the glass 20 is only required to be in an oxidation environment in the toughening process, an oxygen-enriched combustion mode with the equivalence ratio of about 0.7 is adopted. The guide vane 18 is located at the upstream of the burner 1 and is used for limiting high-temperature flue gas to flow near the surface of the glass 20, increasing the flow velocity of the flue gas and improving the heat convection coefficient. The flue gas generated by the burner 1 is guided by the guide vane 18 in the furnace, flows upstream against the movement direction of the glass 20 at the downstream of the furnace, and is finally discharged through the flue 6. The flue gas flowing mode can form temperature distribution with high downstream temperature and low upstream temperature in the furnace, and the glass 20 is gradually heated in the conveying process in the furnace, so that the glass 20 is prevented from being deformed due to rapid heating, and the gradient utilization of heat can be realized. The exhaust gas temperature of the glass 20 tempering heating furnace is about 150-200 ℃, and the water vapor in the exhaust gas is prevented from condensing in the furnace. The heat exchanger 5 is a condensing heat exchanger, and exchanges heat between air required by combustion and the discharged flue gas, and the temperature of the flue gas after heat exchange is about 50 ℃. At the moment, the water vapor in the flue gas is condensed, so that the latent heat of the water vapor can be recovered, and the heat recovery rate is improved. The air heated by the heat exchanger 5 is mixed with the high-temperature flue gas led out from the furnace, the heat of the flue gas is recycled, the air temperature is increased, and the oxygen concentration in the air is reduced. The mode ensures stable and efficient combustion and reduces the emission of nitrogen oxides and carbon monoxide.
The glass 20 is fed upstream and discharged downstream. The direction of the flue gas flow is opposite to the direction of glass 20 movement. The furnace is divided into a preheating section and a heating section according to the temperature. The glass 20 enters the furnace and passes through a preheating section. The preheating section is internally provided with combusted smoke, and the temperature is gradually reduced along the flowing direction of the airflow. In the horizontal furnace, the glass 20 is heated mainly by heat conduction of the roller table 8 and convection of the flue gas in the preheating section. In a vertical furnace, the glass 20 is subjected to predominantly convective heating by flue gases in the preheating section. During the advance of the glass 20 in the preheating section, the temperature is gradually increased, so as to avoid deformation or explosion caused by rapid heating. Meanwhile, a part of heat can be recovered by heating the glass 20 by using the flue gas, so that the heat efficiency is improved. The glass 20 passes through the preheating section and then enters the heating section, and the burner 1 is arranged in the heating section. In the vertical heating furnace, the glass 20 is heated by the high-temperature flue gas after combustion in a convection mode, and meanwhile, the high-temperature metal mesh 14 has a radiation heating effect on the glass 20. In the horizontal heating furnace, the upper surface of the glass 20 is heated by the convection of the flue gas and the radiation of the metal mesh 14, the lower surface of the glass 20 is mainly heated by the heat conduction of the roller way 8, and the lower burner 1 is mainly used for heating the roller way 8. And discharging the glass 20 from the furnace for cooling after the heating section reaches the set temperature. The flue gas generated by combustion flows along the reverse direction of the running of the glass 20, wherein most of the flue gas is discharged through the upstream flue 6, and the discharged flue gas enters the heat exchanger 5 to exchange heat with air supplied for combustion and recover the heat of the flue gas; in addition, less part of flue gas is led out through a pipeline in the middle of the hearth and is mixed with air for combustion, so that the temperature of the flue gas is further increased, the oxygen concentration is reduced, and the aim of reducing the emission of nitrogen oxides after combustion is achieved while the heat efficiency is improved. The burner 1 in the heating furnace adopts a coaxial injection mode. The gas is injected at high velocity through the central fuel inlet 15, creating a negative pressure in the mixing chamber 17. Air is injected into the mixing chamber 17 under the action of negative pressure and mixed with fuel to form premixed gas. The premixed gas is divided by the flow deflector 18 and enters the area of the metal mesh 14, and is ignited by the igniter 13 and then combusted.
An operation method of a combustion type glass toughening heating device comprises the following steps:
step 1, the glass 20 enters the furnace and firstly passes through a preheating section, and is mainly heated by heat conduction of a roller way 8 and convection of smoke;
step 2, in the vertical heating furnace, the glass 20 is mainly heated by the convection of the flue gas in the preheating section, the temperature of the glass 20 is gradually increased in the process of advancing in the preheating section, meanwhile, the glass 20 is heated by the flue gas, a part of heat can be recovered, the heat efficiency is improved, the glass 20 enters the heating section after passing through the preheating section, a burner 1 is arranged in the heating section, the glass 20 is heated by the high-temperature flue gas after combustion in the vertical heating furnace in a convection mode, and meanwhile, the high-temperature metal mesh 14 has a radiation heating effect on the glass 20;
in the horizontal heating furnace, the upper surface of the glass 20 is heated by the convection of the flue gas and the radiation of the metal mesh 14, the lower surface of the glass 20 is mainly heated by the heat conduction of the roller way 8, and the lower burner 1 is mainly used for heating the roller way 8. And discharging the glass 20 from the furnace for cooling after the heating section reaches the set temperature. The flue gas generated by combustion flows along the reverse direction of the running of the glass 20, wherein most of the flue gas is discharged through the upstream flue 6, the discharged flue gas enters the heat exchanger 5 to exchange heat with air supplied for combustion and recover the heat of the air, and in addition, less part of the flue gas is led out through a pipeline in the middle of the hearth to be mixed with the air supplied for combustion, so that the temperature of the flue gas is further improved, and the oxygen concentration is reduced;
step 3, adopting a coaxial injection mode for a burner 1 in the heating furnace; the fuel gas is injected at high speed from a central fuel inlet 15, and negative pressure is formed in a mixing chamber 17; the air is injected into the mixing chamber 17 under the action of negative pressure and is mixed with the fuel to form premixed gas; the premixed gas is divided by the flow deflector 18 and enters the area of the metal mesh 14, and is ignited by the igniter 13 and then combusted.
Claims (2)
1. The combustion type glass tempering heating device is characterized by comprising a furnace body, a glass conveying system, burners, a heat exchanger and flow deflectors, wherein a heat insulation layer is arranged inside the furnace body, the furnace body is connected with a plurality of burners, the burners are uniformly distributed on the furnace body, each burner comprises an igniter, a metal mesh, a fuel inlet, an air inlet, a mixing chamber and the flow deflectors, the outer side of the mixing chamber is connected with the furnace body, the inner part of the mixing chamber is connected with the flow deflectors, the inner end of the mixing chamber is connected with the metal mesh, the outer side of the metal mesh is connected with the igniter, the middle part of the mixing chamber is connected with the fuel inlet, the outer end of the fuel inlet is connected with a fuel pipeline, the outer end of the mixing chamber is provided with the air inlet, the outer end of the air inlet is connected with an air pipeline, the right end of the air pipeline, A glass conveying system is arranged between the first furnace body and the second furnace body; the first furnace body sub-unit connection flue gas return line, the low reaches furnace gate is connected to the second furnace body left end, second furnace body right-hand member connection flue, the upper reaches furnace gate is connected to the right lower part of flue, heat exchanger right side lower part is connected on flue upper portion, the flue gas pipeline is connected on the upper left portion of heat exchanger, flue gas return line is connected to the flue gas pipeline.
2. The combustion type heating device for glass tempering according to claim 1, wherein said glass conveying system is divided into a horizontal tempering furnace conveying system and a vertical tempering furnace conveying system, said horizontal tempering furnace conveying system comprises roller tables, said roller tables are located in the middle of the furnace body, said roller tables are horizontally distributed, the upper side of the roller tables is connected with glass, said vertical tempering furnace conveying system comprises hanging mechanisms, said hanging mechanisms are vertically grouped and oppositely distributed, and the inner side of said hanging mechanisms is connected with glass.
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| CN201920399573.4U CN209853984U (en) | 2019-03-27 | 2019-03-27 | Combustion type glass tempering heating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109912188A (en) * | 2019-03-27 | 2019-06-21 | 天津泓雅节能科技有限责任公司 | A kind of combustion-type glass tempering heating device and operating method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109912188A (en) * | 2019-03-27 | 2019-06-21 | 天津泓雅节能科技有限责任公司 | A kind of combustion-type glass tempering heating device and operating method |
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