CN219112884U - Integrated pure oxygen combustion baking device - Google Patents
Integrated pure oxygen combustion baking device Download PDFInfo
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- CN219112884U CN219112884U CN202223515391.XU CN202223515391U CN219112884U CN 219112884 U CN219112884 U CN 219112884U CN 202223515391 U CN202223515391 U CN 202223515391U CN 219112884 U CN219112884 U CN 219112884U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
An integrated pure oxygen combustion baking device is used for baking steel ladles and preheating scrap steel in steelworks. The device comprises a pure oxygen burner, a hot flue gas collector, a heat exchanger, a spray gun and a fixed bracket; the pure oxygen burner, the hot flue gas collector and the heat exchanger are integrated on the ladle cover, the pure oxygen burner is positioned in the middle of the ladle cover, the heat exchanger is positioned between the pure oxygen burner and the hot flue gas collector, the fixed support is provided with a turnover support, a rotating shaft and a fixed pulley block, the ladle cover is provided with a movable pulley block, the movable pulley block is connected with the fixed pulley block arranged on the fixed support through a traction rope, the turnover support is fixed on the ladle cover, and the turnover support realizes turnover within a range from horizontal to vertical 85 degrees under the tension of the traction rope through the rotating shaft; the cold gas is heated to become hot gas, the hot gas enters a pure oxygen burner for burning, the hot gas is cooled to become cold gas for emptying, and the temperature of the cold gas is lower than 200 ℃, so that compared with the exhaust gas of a conventional baking device with the temperature of more than 1000 ℃, the smoke exhaust loss is greatly reduced.
Description
Technical Field
The utility model relates to an integrated pure oxygen combustion baking device, which is particularly suitable for baking steel ladles and preheating scrap steel in the steel production process.
Background
By-products such as blast furnace gas, converter gas and the like are accompanied in steelmaking and ironmaking production of steel plants, and the gas is often used as a combustion medium of a ladle baking device and a scrap steel preheating device. At present, two main problems exist: 1. the gas has lower heat value, low flame temperature and longer baking time; 2. the waste heat of the flue gas is not favorable for recycling, the temperature of the flue gas is high, and the amount of the flue gas is large. Both of these aspects result in a large waste, leading to an increase in production costs. Therefore, technical upgrades are required from three aspects of increasing flame temperature, reducing exhaust gas temperature and reducing exhaust gas amount to reduce production cost.
Disclosure of Invention
Technical problems: the utility model aims to overcome the defects in the prior art, and provides an integrated pure oxygen combustion baking device which utilizes pure oxygen combustion to improve flame temperature, reduce smoke exhaust amount, and utilizes a heat exchanger to recycle smoke waste heat so as to reduce smoke exhaust temperature.
According to the technical scheme, the integrated pure oxygen combustion baking device comprises a pure oxygen combustor, a hot flue gas collector, a heat exchanger, a spray gun and a fixed support; the steel ladle cover is provided with a movable pulley block, the movable pulley block is connected with the fixed pulley block arranged on the fixed bracket through a traction rope, the turnover bracket is fixed on the steel ladle cover, and the turnover bracket realizes turnover within a range from horizontal to vertical 85 degrees under the tension of the traction rope through the rotation shaft;
the steel ladle cover 1 comprises a metal shell and a heat insulation layer positioned in the metal shell; the metal shell is provided with a plurality of hot smoke flow through holes matched with the hot smoke collector and pure oxygen burner openings matched with the pure oxygen burner;
the hot flue gas collector comprises a hot flue gas collecting chamber and a plurality of hot flue gas collecting inlets which are uniformly distributed below the hot flue gas collecting chamber, wherein the inner side of the hot flue gas collecting chamber is provided with a hot flue gas collecting outlet which is communicated with the heat exchanger, the plurality of hot flue gas collecting inlets are communicated with a plurality of hot flue gas circulating holes on the ladle cover one by one, and the plurality of hot flue gas collecting inlets are collected in the hot flue gas collecting chamber;
the heat exchanger comprises a heat exchanger flue gas channel positioned in the middle of the shell and a heat exchanger coal gas channel positioned on the upper layer and the lower layer of the heat exchanger flue gas channel and communicated with each other, and a heat exchanger hot flue gas inlet of the heat exchanger flue gas channel is communicated with a hot flue gas collecting outlet;
the pure oxygen burner comprises a hot gas collecting chamber positioned in the middle of the heat exchanger and a central guide pipe arranged in the middle of the gas collecting chamber, wherein a cold gas outlet pipe and a cold gas inlet pipe are sequentially arranged at the upper part of the central guide pipe in parallel, a plurality of hot gas spray pipes which are communicated with the holes of the pure oxygen burner one by one are uniformly distributed on the circumference of the bottom of the hot gas collecting chamber, and flue gas entering the cold gas inlet pipe flows out of the hot gas spray pipes after flowing through a gas channel of the heat exchanger into the hot gas collecting chamber, and flue gas entering from a hot flue gas inlet of the heat exchanger flows out of the cold gas outlet pipe through a flue gas channel of the heat exchanger;
the spray gun comprises a central oxygen spray gun and a main oxygen spray gun, wherein the central oxygen spray gun is positioned in a central guide pipe of the pure oxygen burner, and the main oxygen spray gun is distributed around the hot gas spray pipe.
The central conduit is a round heat-resistant steel pipe, and the inner diameter of the heat-resistant steel pipe is 60-100 mm.
The central oxygen spray gun is of a double-layer steel pipe structure, the inner diameter of the double-layer steel pipe is 30-60 mm, the outer diameter of the double-layer steel pipe is 57-95 mm, and oxygen passes through an interlayer of the double-layer steel pipe.
The number of the main oxygen spray guns is 1-3 times of that of the hot gas spray tubes; the center distance between the main oxygen spray gun and the hot gas spray pipe is 1.5-4 times of the diameter of the hot gas spray pipe.
The hot gas spray pipes are round or polygonal, and the number of the hot gas spray pipes is 2-8; the equivalent diameter of the hot gas jet pipe is 50-200 mm.
The hot flue gas collector 2 is in a circular ring shape or a ladder shape, the flow rate of hot flue gas flowing in the hot flue gas collecting inlet 2.1 of the hot flue gas collector 2 is 3-15 m/s, and the equivalent diameter is 60-180 mm.
The number of the hot flue gas collecting outlets is 2-36, and the number of the hot flue gas inlets of the heat exchanger is consistent with the number of the hot flue gas collecting outlets.
The heat exchanger is a countercurrent double-pipe heat exchanger or a plate heat exchanger or a light pipe type and fin type heat exchanger.
The ladle cover is round for ladle heating or rectangular for waste steel bucket heating; the heat exchanger for ladle heating is in a cross structure, the heat exchanger 3 for waste steel bucket heating is in an I-shaped structure, the quantity of pure oxygen burners in the middle of the heat exchanger is determined according to the length of the ladle cover, the pure oxygen burners are arranged in a line along the length direction of the ladle cover, and the distance between the pure oxygen burners is 1-3 m.
The set temperature of the cold flue gas discharged by the heat exchanger is 150-400 ℃.
The beneficial effects are that: the integrated pure oxygen combustion baking device can be used for heating round steel ladle heating and steel scrap hopper heating, a pure oxygen burner, a hot flue gas collector and a heat exchanger are integrated on a steel ladle cover, the steel ladle cover is arranged on a turnover support, and the turnover support can realize turnover within a range from horizontal to vertical 85 degrees under the pulling force of a traction rope through a rotating shaft. Cold gas enters the burner from the cold gas inlet, then enters the heat exchanger, then enters the hot gas channel, then enters the hot gas collecting chamber, and then is sprayed out through the hot gas spray pipe. The hot flue gas enters the hot flue gas collector from the hot flue gas circulation hole, then enters the heat exchanger, then enters the burner, and then is discharged through the cold flue gas outlet. The cold gas is changed into hot gas after being heated, and the hot gas enters a pure oxygen burner for burning. The hot flue gas is cooled down and then becomes cold flue gas to be emptied. The temperature of cold flue gas can reach below 200 ℃, the flame temperature is increased by using pure oxygen combustion, the smoke exhaust amount is reduced, the flue gas waste heat is recovered by using a heat exchanger, and the smoke exhaust temperature is reduced. Compared with the conventional baking device, the smoke exhaust device has the advantages that smoke exhaust loss is greatly reduced due to the fact that smoke exhaust is carried out at the temperature of more than 1000 ℃. The novel portable electric power generation device is simple in structure, convenient to use and wide in practicability.
Drawings
FIG. 1 is a schematic view of an embodiment of an integrated pure oxygen combustion baking apparatus according to the present utility model.
FIG. 2 is a schematic view of a burner and heat exchanger according to the present utility model.
Fig. 3 is a schematic view of the flue gas collector of the present utility model.
Fig. 4 is a schematic view of a circular ladle cover structure according to the present utility model.
FIG. 5 is a schematic diagram of a second embodiment of an integrated pure oxygen combustion baking apparatus according to the present utility model.
In the figure: 1. steel ladle cover, 2.hot flue gas collector, 3.heat exchanger, 4.pure oxygen burner, 5.main oxygen spray gun, 6.movable pulley block, 7.haulage rope, 8.turnover support, 9.swing shaft, 10.fixed support, 11.fixed pulley block, 1.1.metal casing, 1.2.insulating heat preservation, 1.3, hot flue gas through hole, 1.4.matched pure oxygen burner opening, 2.1.hot flue gas collecting inlet, 2.2.hot flue gas collecting chamber, 2.3.hot flue gas collecting outlet, 3.1.heat exchanger hot flue gas inlet, 3.2.heat exchanger gas channel, 3.3.heat exchanger flue gas channel, 4.1 burner cold flue gas outlet, 4.2.cold gas inlet, 4.3.hot gas collecting chamber, 4.4.hot gas spray pipe, 4.5.5.1 central oxygen spray gun.
Detailed description of the preferred embodiments
The utility model is further described below with reference to examples of embodiments in the accompanying drawings:
the utility model relates to an integrated pure oxygen combustion baking device which comprises a pure oxygen combustor 4, a hot flue gas collector 2, a heat exchanger 3, a spray gun and a fixed bracket 10; the pure oxygen burner 4, the hot flue gas collector 2 and the heat exchanger 3 are integrated on the ladle cover 1, the hot flue gas collector 2 is attached to the ladle cover 1, the pure oxygen burner 4 is positioned in the middle of the ladle cover 1, the heat exchanger 3 is positioned between the pure oxygen burner 4 and the hot flue gas collector 2 and is respectively communicated with the pure oxygen burner 4 and the hot flue gas collector 2, the fixed support 10 is provided with a turnover support 8, a rotating shaft 9 and a fixed pulley block 11, the ladle cover 1 is provided with a movable pulley block 6, the movable pulley block 6 is connected with the fixed pulley block 11 arranged on the fixed support 10 through a traction rope 7, the turnover support 8 is fixed on the ladle cover 1, and the turnover support 8 realizes turnover within a range of horizontal to vertical 85 degrees under the tension of the traction rope 7 through the rotating shaft 9; the ladle cover 1 is round for ladle heating or rectangular for waste steel bucket heating; when the ladle cover 1 is round, the heat exchanger 3 is in a cross structure, and the set temperature of cold flue gas discharged by the heat exchanger 3 is 150-400 ℃. When the ladle cover 1 is rectangular, the heat exchanger 3 is in an I-shaped structure, the number of the pure oxygen burners 4 arranged in the middle of the heat exchanger 3 is determined according to the length of the ladle cover, the pure oxygen burners 4 are arranged in a line along the length direction of the ladle cover, and the distance between the pure oxygen burners 4 is 1-3 m.
The ladle cover 1 comprises a metal shell 1.1 and a heat insulation layer 1.2 positioned in the metal shell; the metal shell 1.1 is provided with a plurality of hot flue gas circulation holes 1.3 matched with the hot flue gas collector 2 and pure oxygen burner openings 1.4 matched with the pure oxygen burner 4;
the hot flue gas collector 2 comprises a hot flue gas collecting chamber 2.2 and a plurality of hot flue gas collecting inlets 2.1 uniformly distributed below the hot flue gas collecting chamber 2.2, wherein a hot flue gas collecting outlet 2.3 communicated with the heat exchanger 3 is arranged on the inner side of the hot flue gas collecting chamber 2.2, the plurality of hot flue gas collecting inlets 2.1 are communicated with a plurality of hot flue gas circulating holes 1.3 on the ladle cover 1 one by one, and the plurality of hot flue gas collecting inlets 2.1 are summarized in the hot flue gas collecting chamber 2.2;
the heat exchanger 3 comprises a heat exchanger flue gas channel 3.3 positioned in the middle of the shell and a heat exchanger coal gas channel 3.2 positioned on the upper layer and the lower layer of the heat exchanger flue gas channel 3.3 and communicated with each other, and a heat exchanger hot flue gas inlet 3.1 of the heat exchanger flue gas channel 3.3 is communicated with a hot flue gas collecting outlet 2.3; the heat exchanger 3 is a countercurrent double-pipe heat exchanger or a plate heat exchanger or a light pipe type and fin type heat exchanger.
The pure oxygen burner 4 comprises a hot gas collecting chamber 4.3 positioned in the middle of the heat exchanger 3 and a central guide pipe 4.5 arranged in the middle of the gas collecting chamber 4.3, wherein a cold gas outlet pipe 4.1 and a cold gas inlet pipe 4.2 are sequentially arranged at the upper part of the central guide pipe 4.5 in parallel, a plurality of hot gas spray pipes 4.4 which are communicated with the holes 1.4 of the pure oxygen burner one by one are uniformly distributed on the circumference of the bottom of the hot gas collecting chamber 4.3, and the flue gas entering the cold gas inlet pipe 4.2 flows through a heat exchanger gas channel 3.2 into the hot gas collecting chamber 4.3 and then flows out of the hot gas spray pipes 4.4, and the flue gas entering from a hot flue gas inlet 3.1 of the heat exchanger flows out of the cold gas outlet pipe 4.1 through the heat exchanger gas channel 3.3;
the lance comprises a central oxygen lance 5.1 and a main oxygen lance 5, wherein the central oxygen lance 5.1 is positioned in a central conduit 4.5 of the pure oxygen burner 4, and the main oxygen lance 5 is distributed around the hot gas lance 4.4. The central conduit 4.5 is a round heat-resistant steel pipe, and the inner diameter of the heat-resistant steel pipe is 60-100 mm. The central oxygen spray gun 5.1 is of a double-layer steel pipe structure, the inner diameter of the double-layer steel pipe is 30-60 mm, the outer diameter of the double-layer steel pipe is 57-95 mm, and oxygen passes through an interlayer of the double-layer steel pipe.
The number of the main oxygen spray guns 5 is 1 to 3 times of the number of the hot gas spray tubes 4.4; the center distance between the main oxygen spray gun 5 and the hot gas spray pipe 4.4 is 1.5-4 times of the diameter of the hot gas spray pipe 4.4. The hot gas spray pipes 4.4 are round or polygonal, and the number of the hot gas spray pipes is 2-8; the equivalent diameter of the hot gas jet pipe 4.4 is 50-200 mm.
The hot flue gas collector 2 is in a circular ring shape or a ladder shape; the flow rate of the hot flue gas flowing in the hot flue gas collecting inlet 2.1 of the hot flue gas collector 2 is 3-15 m/s, and the equivalent diameter is 60-180 mm.
The number of the hot flue gas collecting outlets 2.3 is 2-36, and the number of the hot flue gas inlets 3.1 of the heat exchanger 3 is consistent with the number of the hot flue gas collecting outlets 2.3.
The first embodiment is shown in fig. 1-4, and the integrated pure oxygen combustion baking device for ladle heating comprises a ladle cover 1, a pure oxygen burner 4, a hot flue gas collector 2, a heat exchanger 3, a main oxygen spray gun 5, a movable pulley block 6, a traction rope 7 and a fixed bracket 10; the pure oxygen burner 4, the hot flue gas collector 2 and the heat exchanger 3 are integrated on the ladle cover 1, the ladle cover 1 and the hot flue gas collector 2 are in a circular ring shape, the hot flue gas collector 2 is attached to the inner ring of the ladle cover 1, and the heat exchanger 3 is in a cross shape and is arranged in the circular ring of the hot flue gas collector 2; the pure oxygen burner 4 is positioned in the middle of the hot flue gas collector 2, the main oxygen spray gun 5 is arranged around the pure oxygen burner 4, and one side of the pure oxygen burner 4 is provided with a movable pulley block 6 connected with a traction rope 7; the steel ladle cover 1 is arranged on the turnover support 8, the turnover support 8 can realize turnover within a range from horizontal to vertical by 85 degrees under the tensile force of the traction rope 7 through the rotation shaft 9, and the steel ladle cover 1 comprises a metal shell 1.1 and a heat insulation layer 1.2 positioned in the metal shell; the hot flue gas collector 2 comprises a plurality of hot flue gas collecting inlets 2.1, a plurality of hot flue gas collecting chambers 2.2 and a plurality of hot flue gas collecting outlets 2.3, wherein the plurality of hot flue gas collecting inlets 2.1 are connected with a plurality of hot flue gas through holes 1.3 arranged on the ladle cover 1, the plurality of hot flue gas collecting inlets 2.1 are summarized in the hot flue gas collecting chambers 2.2, the hot flue gas collecting outlets 2.3 are connected with the hot flue gas inlets 3.1 of the heat exchanger 3, and the flue gas channels 3.3 of the heat exchanger 3 are communicated with the cold flue gas outlet 4.1 of the burner; the pure oxygen burner 4 is positioned at the center of the ladle cover, a cold gas inlet pipe 4.2 on the pure oxygen burner 4 is communicated with a gas channel 3.2 of the heat exchanger 3, the gas channel 3.2 is communicated with a hot gas collecting chamber 4.3, and the hot gas collecting chamber 4.3 is communicated with a hot gas spray pipe 4.4; the central oxygen lance 5.1 is located in the central duct 4.5 of the pure oxygen burner 4, and the main oxygen lance 5 is distributed around the hot gas lance 4.4.
The central oxygen spray gun 5.1 is positioned in the central guide pipe 4.5 of the pure oxygen burner, the central guide pipe 4.5 is a round heat-resistant steel pipe, and the inner diameter of the heat-resistant steel pipe is 60-100 mm. The central oxygen spray gun 5.1 is of a double-layer steel pipe structure, oxygen walks through the interlayer of the two layers of steel pipes, and the center of the inner layer steel pipe is used for installing an ignition device. The central oxygen spray gun 5.1 is of a double-layer steel pipe structure, the inner diameter of the double-layer steel pipe is 30-60 mm, the outer diameter of the double-layer steel pipe is 57-95 mm, oxygen passes through an interlayer of the double-layer steel pipe, and the ignition device is arranged in the center of the inner-layer steel pipe.
The main oxygen spray guns 5 are distributed around the hot gas spray pipes 4.4, and the number of the main oxygen spray guns 5 is 1-3 times of that of the hot gas spray pipes 4.4. The center distance of the hot gas spray pipes 4.4 is 1.5-4 times of the diameter of the hot gas spray pipes 4.4. The number of the hot gas spray pipes 4.4 is 2-6. The hot gas spray pipes 4.4 are round, the number of the hot gas spray pipes is 3-8, and the equivalent diameter of the hot gas spray pipes 4.4 is 50-200 mm.
The hot flue gas collector 2 is in a circular ring shape or a polygonal ring shape, and the number of sides of the polygonal ring shape is 4-12. The flow speed of the hot flue gas flowing in the hot flue gas collecting inlet 2.1 of the hot flue gas collector 2 is 3-15 m/s; the equivalent diameter is 60-180 mm.
The number of the hot flue gas collecting outlets 2.3 is 2-36, and the number of the hot flue gas inlets 3.1 of the heat exchanger 3 is consistent with the number of the hot flue gas collecting outlets 2.3.
The heat exchanger 3 is a countercurrent double-pipe heat exchanger or a plate heat exchanger, or is a light pipe type and fin type, and the discharge temperature of cold flue gas of the heat exchanger 3 is 150-400 ℃.
The hot flue gas collection inlets 2.1 are connected with hot flue gas circulation holes on the ladle cover 1, the hot flue gas collection inlets 2.1 are summarized in the hot flue gas collection chamber 2.2, the hot flue gas collection outlets 2.3 are connected with the hot flue gas inlets 3.1 of the heat exchanger, and the flue gas channels 3.2 of the heat exchanger are communicated with the cold flue gas outlets 4.1 of the burner. The pure oxygen burner 4 is positioned at the center of the ladle cover 1, a cold gas inlet on the pure oxygen burner 4 is communicated with a gas channel of the heat exchanger, the tail end of the gas channel flow is a hot gas channel, the hot gas channel is communicated with a hot gas collecting chamber, and the hot gas collecting chamber is communicated with a hot gas spray pipe. The central oxygen spray gun is positioned in the central guide pipe of the burner, and the main oxygen spray gun is distributed around the hot gas spray pipe.
Cold gas enters the pure oxygen burner from the cold gas inlet, then enters the gas channel of the heat exchanger, reaches the hot gas channel after being heated, enters the hot gas collecting chamber from the hot gas channel, and is sprayed out through the hot gas spray pipe after being converged and equalized in the hot gas collecting chamber. The hot gas is mixed with oxygen sprayed by the central oxygen spray gun and the main oxygen spray gun for combustion. The burning flame is used for baking the ladle lining or preheating the steel scraps in the waste ladle, and the burnt hot flue gas enters the hot flue gas collecting inlet from the hot flue gas circulation hole, then enters the hot flue gas collecting chamber, and then enters the hot flue gas inlet of the heat exchanger through the hot flue gas collecting outlet, heat is transferred to coal gas in the heat exchanger, and the hot flue gas is changed into cold flue gas to enter the burner and then is discharged through the cold flue gas outlet. The cold gas is changed into hot gas after being heated, and the hot gas enters a pure oxygen burner for burning. The hot flue gas is cooled down and then becomes cold flue gas to be emptied. The temperature of the cold smoke can reach below 200 ℃, and compared with the smoke discharged by the conventional baking device at the temperature of above 1000 ℃, the smoke discharging loss is greatly reduced.
In the second embodiment, as shown in fig. 5, the integrated pure oxygen combustion baking device for heating the waste steel hopper is basically the same as that in the first embodiment, and the same parts are omitted. The difference is that: the ladle cover 1 is rectangular, the hot flue gas collector 2 is in a ladder shape, the heat exchanger 3 is in an I-shaped structure, two ends of the heat exchanger are arranged on the hot flue gas collector 2 and are communicated with the hot flue gas collector 2, the number of the burners 4 arranged in the middle of the heat exchanger 3 is determined according to the length of the ladle cover, the burners 4 are arranged in a straight line along the length direction of the ladle cover 1, and the interval between the burners 4 is 1-3 m. The flow speed of the hot flue gas flowing in the hot flue gas collecting inlet 2.1 of the hot flue gas collector 2 is 3-15 m/s; the equivalent diameter is 60-180 mm.
Claims (10)
1. An integrated pure oxygen combustion baking device comprises a pure oxygen combustor (4), a hot flue gas collector (2), a heat exchanger (3), a spray gun and a fixed bracket (10); the method is characterized in that: the steel ladle cover (1) is provided with a movable pulley block (6), the movable pulley block (6) is connected with the fixed pulley block (11) arranged on the fixed bracket (10) through a traction rope (7), the turnover bracket (8) is fixed on the steel ladle cover (1), and the turnover bracket (8) is horizontally and vertically turned over in a range of 85 degrees under the tension of the traction rope (7) through the rotation shaft (9);
the ladle cover (1) comprises a metal shell (1.1) and a heat insulation layer (1.2) positioned in the metal shell; a plurality of hot flue gas circulation holes (1.3) matched with the hot flue gas collector (2) and pure oxygen burner openings (1.4) matched with the pure oxygen burner (4) are arranged on the metal shell (1.1);
the hot flue gas collector (2) comprises a hot flue gas collecting chamber (2.2) and a plurality of hot flue gas collecting inlets (2.1) uniformly distributed under the hot flue gas collecting chamber (2.2), wherein the inner side of the hot flue gas collecting chamber (2.2) is provided with a hot flue gas collecting outlet (2.3) communicated with the heat exchanger (3), the plurality of hot flue gas collecting inlets (2.1) are communicated with a plurality of hot flue gas circulating holes (1.3) on the ladle cover (1) one by one, and the plurality of hot flue gas collecting inlets (2.1) are summarized in the hot flue gas collecting chamber (2.2);
the heat exchanger (3) comprises a heat exchanger flue gas channel (3.3) positioned in the middle of the shell and a heat exchanger coal gas channel (3.2) positioned on the upper layer and the lower layer of the heat exchanger flue gas channel (3.3) and communicated with each other, and a heat exchanger hot flue gas inlet (3.1) of the heat exchanger flue gas channel (3.3) is communicated with a hot flue gas collecting outlet (2.3);
the pure oxygen burner (4) comprises a hot gas collecting chamber (4.3) positioned in the middle of the heat exchanger (3) and a central guide pipe (4.5) arranged in the middle of the gas collecting chamber (4.3), wherein a cold gas outlet pipe (4.1) and a cold gas inlet pipe (4.2) are sequentially arranged at the upper part of the central guide pipe (4.5) in parallel, a plurality of hot gas spray pipes (4.4) which are in one-to-one communication with the holes (1.4) of the pure oxygen burner are uniformly distributed on the circumference of the bottom of the hot gas collecting chamber (4.3), and the flue gas entering the cold gas inlet pipe (4.2) flows out of the hot gas spray pipes (4.4) after flowing through the gas channels (3.2) of the heat exchanger, and the flue gas entering from the hot flue gas inlet (3.1) of the heat exchanger flows out of the cold gas outlet pipe (4.1) through the gas channels (3.3) of the heat exchanger;
the spray gun comprises a central oxygen spray gun (5.1) and a main oxygen spray gun (5), wherein the central oxygen spray gun (5.1) is positioned in a central guide pipe (4.5) of the pure oxygen burner (4), and the main oxygen spray gun (5) is distributed around the hot gas spray pipe (4.4).
2. The integrated pure oxygen combustion toasting device of claim 1, wherein: the central conduit (4.5) is a round heat-resistant steel pipe, and the inner diameter of the heat-resistant steel pipe is 60-100 mm.
3. The integrated pure oxygen combustion toasting device of claim 1, wherein: the central oxygen spray gun (5.1) is of a double-layer steel pipe structure, the inner diameter of the double-layer steel pipe is 30-60 mm, the outer diameter of the double-layer steel pipe is 57-95 mm, and oxygen passes through an interlayer of the double-layer steel pipe.
4. The integrated pure oxygen combustion toasting device of claim 1, wherein: the number of the main oxygen spray guns (5) is 1-3 times of the number of the hot gas spray tubes (4.4); the center distance between the main oxygen spray gun (5) and the hot gas spray pipe (4.4) is 1.5-4 times of the diameter of the hot gas spray pipe (4.4).
5. The integrated pure oxygen combustion toasting device of claim 1, wherein: the hot gas jet pipes (4.4) are round or polygonal, and the number of the hot gas jet pipes is 2-8; the equivalent diameter of the hot gas jet pipe (4.4) is 50-200 mm.
6. The integrated pure oxygen combustion toasting device of claim 1, wherein: the hot flue gas collector (2) is annular or ladder-shaped, the flow rate of hot flue gas flowing in the hot flue gas collecting inlet 2.1 of the hot flue gas collector (2) is 3-15 m/s, and the equivalent diameter is 60-180 mm.
7. The integrated pure oxygen combustion toasting device of claim 1, wherein: the number of the hot flue gas collecting outlets (2.3) is 2-36, and the number of the hot flue gas inlets (3.1) of the heat exchanger (3) is consistent with the number of the hot flue gas collecting outlets (2.3).
8. The integrated pure oxygen combustion toasting device of claim 1, wherein: the heat exchanger (3) is a countercurrent double-pipe heat exchanger or a plate heat exchanger or a light pipe type and fin type heat exchanger.
9. The integrated pure oxygen combustion toasting device of claim 1, wherein: the ladle cover (1) is round for ladle heating or rectangular for waste steel bucket heating; the heat exchanger (3) for ladle heating is of a cross-shaped structure, the heat exchanger (3) for waste steel hopper heating is of an I-shaped structure, the number of pure oxygen burners (4) in the middle of the heat exchanger (3) is determined according to the length of a ladle cover, the pure oxygen burners (4) are arranged in a line along the length direction of the ladle cover, and the distance between the pure oxygen burners (4) is 1-3 m.
10. The integrated pure oxygen combustion toasting device of claim 1 or 8, wherein: the set temperature of cold flue gas discharged by the heat exchanger (3) is 150-400 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223515391.XU CN219112884U (en) | 2022-12-28 | 2022-12-28 | Integrated pure oxygen combustion baking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223515391.XU CN219112884U (en) | 2022-12-28 | 2022-12-28 | Integrated pure oxygen combustion baking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219112884U true CN219112884U (en) | 2023-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223515391.XU Active CN219112884U (en) | 2022-12-28 | 2022-12-28 | Integrated pure oxygen combustion baking device |
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| Country | Link |
|---|---|
| CN (1) | CN219112884U (en) |
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2022
- 2022-12-28 CN CN202223515391.XU patent/CN219112884U/en active Active
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