CN116123725B - Heat accumulating type electric heating hot-blast stove capable of utilizing off-peak electricity - Google Patents
Heat accumulating type electric heating hot-blast stove capable of utilizing off-peak electricity Download PDFInfo
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- CN116123725B CN116123725B CN202310346988.6A CN202310346988A CN116123725B CN 116123725 B CN116123725 B CN 116123725B CN 202310346988 A CN202310346988 A CN 202310346988A CN 116123725 B CN116123725 B CN 116123725B
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- electric heating
- flue gas
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- 238000005485 electric heating Methods 0.000 title claims abstract description 57
- 230000005611 electricity Effects 0.000 title claims abstract description 25
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000003546 flue gas Substances 0.000 claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 239000011449 brick Substances 0.000 claims abstract description 25
- 238000005338 heat storage Methods 0.000 claims abstract description 22
- 238000004378 air conditioning Methods 0.000 claims abstract description 12
- 230000003750 conditioning effect Effects 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000009825 accumulation Methods 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 241000555745 Sciuridae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/355—Control of heat-generating means in heaters
- F24H15/37—Control of heat-generating means in heaters of electric heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1863—Arrangement or mounting of electric heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Direct Air Heating By Heater Or Combustion Gas (AREA)
- Electric Stoves And Ranges (AREA)
Abstract
The invention relates to the field of hot blast stoves, in particular to a heat accumulating type electric heating hot blast stove capable of utilizing low-ebb electricity, wherein a heat accumulating chamber is arranged in a stove body, an electric heating chamber communicated with the heat accumulating chamber is arranged above the stove body, one side of the electric heating chamber is provided with a first flue gas adjusting pipeline, and the other side of the electric heating chamber is provided with a second air adjusting pipeline; a heating unit is arranged in the electric heating chamber, and an air homogenizing plate is arranged in the electric heating chamber; an air homogenizing chamber communicated with the heat storage chamber is arranged below the furnace body, an air homogenizing supporting plate is arranged between the air homogenizing chamber and the heat storage chamber, a heat storage body built by a plurality of layers of checker bricks is arranged on the air homogenizing supporting plate, and an air flow channel is arranged on the heat storage body; one side of the air homogenizing chamber is provided with an air conditioning pipeline I, the other side of the air homogenizing chamber is provided with a flue gas conditioning pipeline II, and the flue gas conditioning pipeline II is externally connected with an induced draft fan. The invention can furthest utilize the night off-peak electricity to store heat, and utilizes the heat stored in the air supply period to exchange heat with cold air, so that the hot blast stove can periodically and circularly work, the electricity consumption cost is effectively reduced, and the heat efficiency of the electric heating hot blast stove is improved.
Description
Technical Field
The invention relates to the field of hot blast stoves, in particular to a heat accumulating type electric heating hot blast stove capable of utilizing off-peak electricity.
Background
The transmission medium of the traditional hot blast stove is mainly air, and the heat energy density carried by the unit volume of air is only a few percent of the heat energy density carried by water, steam or heat conduction oil, so that the hot air output by the hot blast stove is not suitable for long-distance transmission. Hot air appliances, which produce heat by burning coal or gas, are typically installed in the vicinity of the user. The hot blast stoves generally do not have complete desulfurization, denitration and dust removal equipment, and the environmental protection can not meet the requirements only because the operation cost is high. The environmental protection department requires the hot blast stove to use clean energy-electric energy, uses an electric heating air stove to replace a coal-fired or gas hot blast stove, stores heat energy by low-cost off-peak electricity, and finally adopts a solid electricity heat accumulating type hot blast stove form:
the heat accumulating type electric heating hot blast stove disclosed in CN203249386U has the following basic working principle: firstly, the solid heat accumulator is electrically heated, secondly, air is taken as a transmission medium, the heat of the heat accumulator releases heat to enable the air in the inner space of the heat insulating shell of the hot-blast stove to reach a certain temperature, and a fin tube type heat exchanger is placed in the upper space of the heat accumulator in the heat insulating shell, cold air flow is introduced into the inner process of a heat exchanger tube to exchange heat with external hot air, the cold air flow is heated into hot air for a user, the heat exchange efficiency is low, high-temperature and high-flow hot air cannot be produced, the temperature of the hot air is only 80-200 ℃, more importantly, the heat accumulation and the heat release of the heat accumulator are completely irregular and have no period, and cannot be matched with the period of night low-peak electricity and daytime electricity peak of a power grid, so that low-cost low-peak electricity cannot be effectively utilized, and the electricity cost cannot be reduced.
CN211011906U discloses a regenerative electric heating hot blast stove, compared with patent CN203249386U, the conveying medium air and the solid heat accumulator directly perform one-time heat exchange to become hot air required by users, and the secondary heat exchange is not needed in a grading manner, so that the heat exchange efficiency is improved, and therefore, higher hot air temperature can be obtained, and the hot air temperature is 80-500 ℃. However, this type of hot blast stove has a disadvantage that the heat storage and release of the heat storage body cannot be periodically performed, and the heat storage and release cannot be maximally performed. And the electric elements of the electric heating hot blast stove are damaged and are not easy to overhaul, and the equipment is limited in large scale, so that the production of hot blast with higher temperature is also limited.
In summary, the environmental protection requirements of the existing coal-fired and gas hot-blast stoves are not exceeded, but the electric heating hot-blast stoves in the market have low heat efficiency, the heat accumulation and heat release of the heat accumulator cannot form periodicity, and the low-valley electricity cannot be utilized to the greatest extent.
Disclosure of Invention
In order to solve the technical problems, the invention provides a low-valley electricity heat accumulating type electric heating hot blast stove which aims to solve the problems that the existing coal-fired and gas-fired hot blast stove does not meet the environmental protection requirements, the existing electric heating stove is low in hot blast efficiency, the periodicity of heat accumulation and heat release of a heat accumulator cannot be formed, and the low-valley electricity heat accumulation cannot be utilized to the greatest extent.
The invention adopts the following technical scheme:
the utility model provides an available low ebb electricity heat accumulation formula electrical heating hot-blast furnace, includes the furnace body, is provided with the regenerator in the furnace body, and the top of furnace body is provided with the electric heating chamber that communicates with the regenerator, and one side of electric heating chamber is provided with flue gas adjusting pipeline one, and the opposite side is provided with air adjusting pipeline two; a plurality of groups of heating units are arranged in the electric heating chamber, and an air homogenizing plate with holes is also arranged in the electric heating chamber; an air homogenizing chamber communicated with the heat storage chamber is arranged below the furnace body, an air homogenizing supporting plate with holes is arranged between the air homogenizing chamber and the heat storage chamber, a heat storage body built by a plurality of layers of checker bricks is arranged on the air homogenizing supporting plate, and an air flow channel is arranged on the heat storage body; one side of the air homogenizing chamber is provided with an air conditioning pipeline I, and the other side of the air homogenizing chamber is provided with a flue gas conditioning pipeline II which is externally connected with an induced draft fan.
Compared with the prior art, the invention has the beneficial effects that:
the regenerative chamber electric heating hot blast stove provided by the invention is cyclically and periodically operated, one cycle of operation comprises two stages of flue gas heating, a heat storage period of a heat accumulator and an air feeding and heat release period of the heat accumulator, and can furthest utilize night off-peak electricity to store heat of the heat accumulator, so that the electricity consumption cost is effectively reduced, the heat efficiency of the electric heating hot blast stove is improved, and the adjustment range of the output temperature is enlarged.
Further, the invention adopts the following preferable scheme:
the electric heating element is a squirrel-cage heater, the squirrel-cage heater comprises a heating resistance band, a central suspender, an extraction electrode and a fixed ceramic piece, the heating resistance band is connected with the central suspender through the fixed ceramic piece, and the extraction electrode is arranged at the end of the heating resistance band.
The air distributing plate is uniformly distributed with first ventilation holes, and the air distributing supporting plate is uniformly distributed with second ventilation holes.
The inner wall of the air homogenizing chamber is provided with a first refractory lining which is a heavy refractory casting composite lining; the inner wall of the regenerator is provided with a second refractory lining, and the second refractory lining is a composite lining of light refractory castable and heavy refractory bricks; the inner wall of the electric heating chamber is provided with a third refractory lining which is a refractory fiber composite lining.
The top of the electric heating chamber is provided with a wiring shield, and one side of the wiring shield is provided with a wire outlet.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a cross-sectional view B-B of FIG. 1;
FIG. 3 is a cross-sectional view of C-C of FIG. 1;
FIG. 4 is a view in the direction A of FIG. 1;
FIG. 5 is a D-D sectional view of FIG. 1;
FIG. 6 is a sectional view of E-E of FIG. 1;
FIG. 7 is a schematic view of a heating unit;
in the figure: a furnace body 1; a regenerator 2; an electric heating chamber 3; a homogenizing chamber 4; flue gas adjusting pipeline I5; flue gas adjusting pipeline II 6; a variable frequency induced draft fan 7; a refractory lining I8; a second refractory lining 9; a refractory lining III 10; a heating unit 11; heating the resistive strip 1101; a stationary ceramic member 1102; a central boom 1103; an extraction electrode 1104; a wind equalizing plate 12; vent one 1201; an air conditioning duct one 13; an air conditioning duct II 14; a wind homogenizing supporting plate 15; a vent II 1501; a checker brick 16; an air flow passage 17; a wire shield 18; a wire outlet hole 19; and a connecting screw 20.
Detailed Description
The invention is further described below with reference to the drawings and specific examples.
As shown in fig. 1, the available low-valley electricity heat accumulating type electric heating hot blast stove mainly comprises a stove body 1, a heat accumulating chamber 2 is arranged in the stove body 1, an electric heating chamber 3 communicated with the heat accumulating chamber 2 is arranged above the stove body 1, a shell of the electric heating chamber 3 is fixedly connected with the top of the stove body 1 through a connecting bolt 20, a fireproof lining three 10 serving as an insulating layer is built on the inner wall of the electric heating chamber 3, and the fireproof lining three 10 is a fireproof fiber composite lining mainly comprising a fireproof fiber module.
As shown in fig. 6, a flue gas flow pipeline inlet is reserved on the left side of the electric heating chamber 3, a flue gas regulating pipeline I5 is communicated with the interior of the electric heating chamber 3 through the flue gas flow pipeline inlet, an air flow pipeline outlet is reserved on the right side of the electric heating chamber 3, and an air regulating pipeline II 14 is communicated with the interior of the electric heating chamber 3 through the air flow pipeline outlet.
As shown in fig. 6, a perforated air homogenizing plate 12 is installed in the electric heating chamber 3, the air homogenizing plate 12 is arranged below the inlet of the flue gas flow pipeline and the outlet of the air flow pipeline, and as shown in fig. 5, the air homogenizing plate 12 is uniformly distributed with a first ventilating hole 1201.
As shown in fig. 6 and 7, a plurality of groups of heating units 11 are also arranged in the electric heating chamber 3, and the heating units 11 penetrate through the air homogenizing plate 12. The heating unit 11 in this embodiment is a squirrel cage heater mainly composed of a heating resistor belt 1101, a central suspension rod 1103, an extraction electrode 1104, a fixed ceramic member 1102 and the like, the heating resistor belt 1101 is connected to the central suspension rod 1103 by the fixed ceramic member 1102 arranged at intervals along the axial direction of the central suspension rod 1103, the upper end of the heating resistor belt 1101 penetrates the top casing of the electric heating chamber 3, and the extraction electrode 1104 is connected to the upper end of the heating resistor belt 1101 for wiring.
In the embodiment, 12 squirrel-cage heaters are arranged, and the 12 squirrel-cage heaters are grouped into two electric control loops so as to meet the requirements of the hot blast stove on the electric power in different time periods.
The top of the shell of the electric heating chamber 3 is also fixedly provided with a wiring shield 18, and a wire outlet hole 19 for threading is reserved on the right side of the wiring shield 18.
The inner wall of the regenerator 2 is built with a second refractory lining 9 as a heat insulation layer in the regenerator 2, and the second refractory lining 9 is a composite lining mainly made of light refractory castable and heavy refractory bricks.
The interior of the regenerator 2 is built into a checker brick stack through a plurality of layers of checker bricks 16 with a heat accumulating function to serve as a heat accumulator, a plurality of vertical pore channels are arranged in each checker brick 16, and the pore channels are communicated to form an airflow channel 17 after the checker bricks 16 are built.
The air homogenizing chamber 4 communicated with the regenerator 2 is arranged below the furnace body 1, the air homogenizing chamber 15 with holes is arranged between the air homogenizing chamber 4 and the regenerator 2, the air homogenizing support plate 15 is arranged at the bottom of the checker work stack and is used for bearing the whole weight of the checker work stack, the air homogenizing support plate 15 in the embodiment is made of heat-resistant stainless steel, and the air homogenizing support plate 15 is uniformly distributed with the second ventilation holes 1501.
The inner wall of the air homogenizing chamber 4 is built with a first refractory lining 8 serving as an insulating layer, and the first refractory lining 8 is a composite lining made of heavy refractory casting materials.
As shown in FIG. 1, the left side of the air homogenizing chamber 4 is provided with an air flow pipeline inlet, the first air conditioning pipeline 13 is communicated with the inside of the air homogenizing chamber 4 through the air flow pipeline inlet, the right side of the air homogenizing chamber 4 is provided with a flue gas flow pipeline outlet, the second flue gas conditioning pipeline 6 is communicated with the inside of the air homogenizing chamber 4 through the flue gas flow pipeline outlet, and the second flue gas conditioning pipeline 6 is externally connected with a variable-frequency induced draft fan 7.
In this embodiment, four sides of the air distribution plate 12 and the air distribution supporting plate 15 are respectively built on the refractory lining of the four inner walls of the corresponding section chamber.
In this embodiment, check valves are respectively disposed on the first flue gas conditioning duct 5, the second flue gas conditioning duct 6, the first air conditioning duct 13, and the second air conditioning duct 14.
In this embodiment, the refractory lining inside the electric heating chamber 3, the regenerator 2 and the air homogenizing chamber 4 needs to ensure the absolute thermal insulation of the whole hot blast stove.
When the hot-blast stove is in a heat accumulation period, the low-ebb electricity is heated by the squirrel-cage heater of the electric heating chamber 3 at night, at the moment, the cold air inlet and the hot air outlet are closed, namely, the valves on the first air adjusting pipeline 13 and the second air adjusting pipeline 14 are respectively closed, the valves on the first flue gas adjusting pipeline 5 and the second flue gas adjusting pipeline 6 are respectively opened, the variable-frequency induced draft fan 7 is started, low-temperature flue gas enters the electric heating chamber 3 from the first flue gas adjusting pipeline 5, the electric heating chamber 3 is respectively or simultaneously connected with the heating resistor 1101 of the heating unit 11 at low voltage after being reduced by the two power regulators in a non-use period, and two heating regions (temperature control regions) with different electric powers are formed, so that the electric heating chamber 3 is kept at a certain temperature. The heated high-temperature flue gas downwards enters an airflow channel 17 on a checker brick stack at a certain flow speed, heat is transferred to the checker bricks 16 to be stored and heated by the hot blast stove, the flue gas which transfers heat and releases heat to the checker bricks 16 downwards enters a uniform air chamber 4 through a vent II 1501 on a uniform air supporting plate 15, and then is discharged out of the hot blast stove to a user through a flue gas adjusting channel II 6 and a variable frequency induced draft fan 7, so that the hot blast stove is always heated to a required temperature, and then the hot blast stove is transferred into an air feeding and checker brick heat releasing period.
In the daytime, the hot air required by the hot air furnace production is caused by valve reversing, at the moment, the cold flue gas inlet and the hot flue gas outlet are closed, namely, the valves on the flue gas regulating pipeline I5 and the flue gas regulating pipeline II 6 are respectively closed, and the variable-frequency induced draft fan 7 stops running; valves on the first air conditioning pipeline 13 and the second air conditioning pipeline 14 are respectively opened to send low-temperature air with certain pressure and flow into the air homogenizing chamber 4; the low-temperature air flows upwards to the regenerator 2 uniformly through the uniform air supporting plates 15, flows upwards through the layers of checker bricks 16 from the air flow channels 17 in the regenerator 2, absorbs the heat released by the checker bricks 16 and becomes hot air, and the hot air enters the electric heating chamber 3 upwards and is discharged from the air conditioning pipeline II 14 through the uniform air plates 12 to the outside of the hot air furnace for being sent to users.
After a period of air supply, the heat stored in the hot air furnace is reduced, cold air cannot be heated to the required temperature, the air supply period is changed into the heat storage period again, one hot air furnace is electrically heated and then is changed into the air supply period from the heat storage period, one cycle is completed, and the hot air furnace continuously repeats the cycle period.
In the embodiment, in order to ensure the requirement of continuously and stably producing hot air, two hot air furnaces or three hot air furnaces can be paired to produce, when two hot air furnaces are paired, one hot air furnace is used for electric heating and heat storage, the heat storage body of the other hot air furnace is used for heat release to produce hot air, and after a certain time, the two hot air furnaces are operated in a reversing way and are circulated and reciprocated; when three hot blast stoves are in a group, the heat accumulator of one hot blast stove releases heat, and the other two hot blast stoves are electrically heated for heat accumulation.
In this embodiment, when the hot blast stoves are used in groups, since the two paths of gas of the flue gas and the air do not affect each other, for example, when the two paths of gas are both air, the low-temperature flue gas (the temperature is lower than 150 degrees) discharged from the outlet of the induced draft fan of one hot blast stove can be connected in parallel to the cold air inlet pipeline of the other hot blast stove system by using the pipeline, so that the overall heat efficiency of the hot blast stove group can be improved, and the energy sources can be saved.
The hot blast stove of the invention utilizes night off-peak electricity as medium to absorb heat energy converted from electric energy through the checker bricks, exchanges heat with heat stored by the checker bricks when cold air flows through the checker bricks in the air supply period, and replaces the cold air with hot air for users, so that the hot blast stove periodically and circularly works, the night off-peak electricity can be utilized to store heat of the heat accumulator to the greatest extent, the electricity consumption cost is effectively reduced, the heat efficiency of the electric heating hot blast stove is improved, and the regulation range of output temperature is enlarged.
The above is only a specific embodiment of the present invention, but the present invention is not limited thereto, and all equivalent changes or substitutions to the technical features of the present invention, which are conceivable to those skilled in the art, are included in the scope of the present invention.
Claims (2)
1. The utility model provides an available low ebb electricity heat accumulation formula electrical heating hot-blast furnace, includes the furnace body, and the furnace body is inside to be provided with regenerator, its characterized in that: an electric heating chamber communicated with the regenerator is arranged above the furnace body, one side of the electric heating chamber is provided with a first flue gas adjusting pipeline, and the other side of the electric heating chamber is provided with a second air adjusting pipeline; a plurality of groups of heating units are arranged in the electric heating chamber, and an air homogenizing plate with holes is also arranged in the electric heating chamber; an air homogenizing chamber communicated with the heat storage chamber is arranged below the furnace body, an air homogenizing supporting plate with holes is arranged between the air homogenizing chamber and the heat storage chamber, a heat storage body built by a plurality of layers of checker bricks is arranged on the air homogenizing supporting plate, and an air flow channel is arranged on the heat storage body; one side of the air homogenizing chamber is provided with an air conditioning pipeline I, the other side of the air homogenizing chamber is provided with a flue gas conditioning pipeline II, and the flue gas conditioning pipeline II is externally connected with an induced draft fan; the electric heating element is a squirrel-cage heater, the squirrel-cage heater comprises a heating resistance band, a central suspender, an extraction electrode and a fixed ceramic piece, the heating resistance band is connected with the central suspender through the fixed ceramic piece, and the extraction electrode is arranged at the end of the heating resistance band; the air distributing plate is uniformly provided with first ventilation holes, and the air distributing support plate is uniformly provided with second ventilation holes; the inner wall of the air homogenizing chamber is provided with a first refractory lining which is a heavy refractory casting composite lining; the inner wall of the regenerator is provided with a second refractory lining, and the second refractory lining is a composite lining of light refractory castable and heavy refractory bricks; the inner wall of the electric heating chamber is provided with a third refractory lining which is a refractory fiber composite lining; the flue gas regulating pipeline I, the flue gas regulating pipeline II, the air regulating pipeline I and the air regulating pipeline II are respectively provided with a check valve;
when the hot blast stove is in a heat accumulation period, the low-ebb electricity is heated by a squirrel-cage heater of the heating chamber at night, at the moment, the cold air inlet and the hot air outlet are closed, namely, the valves on the first air adjusting pipeline and the second air adjusting pipeline are respectively closed, the valves on the first flue gas adjusting pipeline and the second flue gas adjusting pipeline are respectively opened, a variable-frequency induced draft fan is started, low-temperature flue gas enters the heating chamber from the first flue gas adjusting pipeline, the heating chamber is respectively or simultaneously connected with a heating stop band of the heating unit by low voltage after being reduced by two paths of power regulators in a non-use period, and two heating regions with different electric powers are formed, so that the heating chamber is kept at a certain temperature; the heated high-temperature flue gas downwards enters an airflow channel on a checker brick stack at a certain flow speed, heat is transferred to the checker bricks for storage and the hot blast stove is heated, the flue gas which transfers heat to the checker bricks and releases heat downwards enters a uniform air chamber through a vent hole II on a uniform air supporting plate, and then is discharged out of the hot blast stove through a variable-frequency induced draft fan through a flue gas adjusting channel II to be sent to a user, so that the hot blast stove is always heated to a required temperature, and then the hot blast stove is transferred into an air feeding and checker brick heat releasing period;
in the daytime, the hot air required by the hot air furnace production is caused by valve reversing, at the moment, the cold flue gas inlet and the hot flue gas outlet are closed, namely, the valves on the first flue gas regulating pipeline and the second flue gas regulating pipeline are respectively closed, and the variable-frequency induced draft fan stops running; valves on the first air adjusting pipeline and the second air adjusting pipeline are respectively opened to send low-temperature air with certain pressure and flow into the air homogenizing chamber; the low-temperature air flows upwards to the regenerator uniformly through the uniform air supporting plates, flows upwards from the air flow channels in the regenerator and turns into hot air after absorbing heat release of the checker bricks, and the hot air enters the electric heating chamber upwards and is discharged from the air conditioning pipeline II to the outside of the hot air furnace through the uniform air plates and is sent to users;
after a period of air supply, the heat stored in the hot air furnace is reduced, cold air cannot be heated to the required temperature, the air supply period is changed into the heat storage period again, one hot air furnace is electrically heated and then is changed into the air supply period from the heat storage period, one cycle is completed, and the hot air furnace continuously repeats the cycle period.
2. The electric heating stove of claim 1, wherein: the top of the electric heating chamber is provided with a wiring shield, and one side of the wiring shield is provided with a wire outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310346988.6A CN116123725B (en) | 2023-04-04 | 2023-04-04 | Heat accumulating type electric heating hot-blast stove capable of utilizing off-peak electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310346988.6A CN116123725B (en) | 2023-04-04 | 2023-04-04 | Heat accumulating type electric heating hot-blast stove capable of utilizing off-peak electricity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116123725A CN116123725A (en) | 2023-05-16 |
| CN116123725B true CN116123725B (en) | 2023-08-11 |
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| CN202310346988.6A Active CN116123725B (en) | 2023-04-04 | 2023-04-04 | Heat accumulating type electric heating hot-blast stove capable of utilizing off-peak electricity |
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| CN207551007U (en) * | 2017-10-20 | 2018-06-29 | 山东大学 | The vehicle-mounted electric heater unit of pitch and system, asphalt transport tank vehicle of Power auto-adjustment |
| CN114135891A (en) * | 2021-12-30 | 2022-03-04 | 思安新能源股份有限公司 | Flue gas heat storage system for stabilizing inlet flue gas parameters of waste heat boiler |
| CN218620904U (en) * | 2022-07-26 | 2023-03-14 | 日照钢铁控股集团有限公司 | Top-combustion refractory ball hot blast stove |
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2023
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| FR2303249A1 (en) * | 1975-03-04 | 1976-10-01 | Acec | Off peak electric storage heater - has continuous resistance wire as temperature sensing element in thermal core |
| CN101108416A (en) * | 2007-08-24 | 2008-01-23 | 云南铜业压铸科技有限公司 | Die-casting method of induction motor copper cage rotor and die casting device thereof |
| CN106382744A (en) * | 2016-10-25 | 2017-02-08 | 岳西县长城机械有限公司 | High-temperature hot-blast stove used for tea making and steaming |
| CN207551007U (en) * | 2017-10-20 | 2018-06-29 | 山东大学 | The vehicle-mounted electric heater unit of pitch and system, asphalt transport tank vehicle of Power auto-adjustment |
| CN114135891A (en) * | 2021-12-30 | 2022-03-04 | 思安新能源股份有限公司 | Flue gas heat storage system for stabilizing inlet flue gas parameters of waste heat boiler |
| CN218620904U (en) * | 2022-07-26 | 2023-03-14 | 日照钢铁控股集团有限公司 | Top-combustion refractory ball hot blast stove |
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| CN116123725A (en) | 2023-05-16 |
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