CN106755940A - A kind of full-hydrogen hood-type annealing furnace waste heat recovery method of comprehensive utilization and device - Google Patents
A kind of full-hydrogen hood-type annealing furnace waste heat recovery method of comprehensive utilization and device Download PDFInfo
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- CN106755940A CN106755940A CN201611222345.7A CN201611222345A CN106755940A CN 106755940 A CN106755940 A CN 106755940A CN 201611222345 A CN201611222345 A CN 201611222345A CN 106755940 A CN106755940 A CN 106755940A
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- hydrogen
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/663—Bell-type furnaces
- C21D9/673—Details, accessories, or equipment peculiar to bell-type furnaces
Abstract
A kind of full-hydrogen hood-type annealing furnace waste heat recovery comprehensive utilization device, it is mainly：The inner cover of full-hydrogen hood-type annealing furnace is connected with boiler using steam residual-heat, afterheat of hot water boiler, Magnetic drive No leakage blower fan in turn by hydrogen circulation pipe, is finally connected with full-hydrogen hood-type annealing furnace inner cover again；And it is equipped with high-temperature gas butterfly valve on except each hydrogen circulation line between two boilers.The boiler using steam residual-heat and afterheat of hot water boiler being serially connected by setting, after high-temperature hydrogen in full-hydrogen hood-type annealing furnace is carried out into heat exchange cooling, it is back in full-hydrogen hood-type annealing furnace again, take full advantage of the heat in full-hydrogen hood-type annealing furnace, realize energy-saving and emission-reduction, reduce production cost, high-temperature hydrogen carries out heat convection in being back to inner cover again after heat-exchange temperature reduction to the strip volume in cooling section simultaneously, significantly improve the cooling velocity of strip, reduce stove and account for the time, improve production efficiency, for enterprise cuts down expenses, bring good economic benefit and social effect.
Description
Technical field
The present invention relates to a kind of waste heat recovery method of comprehensive utilization and device.
Background technology
Annealing is production high-quality cold-strip steel, eliminates a kind of conventional process of strip internal stress, general to be moved back using bell-type
Stove carries out annealing process to cold-strip steel volume.One complete annealing process flow includes：Table cleaning → table charging (steel
Volume+convection-plate) → input annealing parameter → buckle inner cover → locking inner cover → cold conditions leakage check → nitrogen purging → startup follows
Ring blower fan → button puts heating mantles → be flushed with hydrogen gas (H2) protection → heating mantles igniting → by setting speed intensification → blower fan by controlling party
Formula is transformed to high-speed cruising → insulation → Thermal Sealing inspection (before insulation terminates) → hang away heating mantles and buckles cooling dome → blower fan
It is cooled to design temperature → shower water and is cooled to tapping temperature → nitrogen and purges → hang away cooling dome → release inner cover and locks → hang away
Inner cover → discharging → annealing data are preserved, the conventional nitrogen Hydrogen protection gas before being instead of substantially due to present bell type annealing furnace
Body (nitrogen Hydrogen protective gas, refer generally to 2~4%H2,96~98%N2), and perhydro protective gas is used, therefore traditional move back
Ignition technique is after insulation terminates, and the hydrogen temperature for protective atmosphere is higher, and in subsequent cooling stage as strip is carried out
Cooling, although there is inner cover to transfer heat to the indirect heat transfer of the cold wind on the outside of inner cover, but cooling effectiveness, while wasting substantial amounts of energy
Source.Under the big situation of current energy-saving and emission-reduction, unnecessary heat waste in bell type annealing furnace how is made full use of, be a weight
The research topic wanted.
The content of the invention
Annealing can be made full use of again it is an object of the invention to provide a kind of cooling effectiveness that can be improved in annealing process
The full-hydrogen hood-type annealing furnace waste heat recovery method of comprehensive utilization and device of heat in stove.
Device of the invention mainly includes：Full-hydrogen hood-type annealing furnace, boiler using steam residual-heat, afterheat of hot water boiler, Magnetic drive
No leakage blower fan, water tank, cooling tower, hydrogen circulation pipe and water pipe.Wherein, the inner cover of full-hydrogen hood-type annealing furnace is circulated by hydrogen
Pipe is connected with boiler using steam residual-heat, afterheat of hot water boiler, Magnetic drive No leakage blower fan in turn, finally again with full-hydrogen hood-type annealing furnace
Inner cover is connected；And high-temperature gas butterfly valve is equipped with except each hydrogen circulation line between two boilers, i.e., in perhydro bell-type
Hydrogen circulation pipe between annealing furnace inner cover and boiler using steam residual-heat is provided with high-temperature gas butterfly valve, in afterheat of hot water boiler and magnetic
Hydrogen circulation pipe between transmission No leakage blower fan is provided with high-temperature gas butterfly valve, in Magnetic drive No leakage blower fan and perhydro bell-type
Hydrogen circulation pipe between annealing furnace inner cover is provided with high-temperature gas butterfly valve.Preferably, thermocouple temperature measurement is set on hydrogen circulation pipe
Device, the hydrogen temperature that can be measured according to thermocouple temperature measuring apparatus adjusts the air circulation of Magnetic drive No leakage blower fan, to protect
Demonstrate,prove the hydrogen temperature scope of each section of hydrogen circulation pipe.The boiler using steam residual-heat, its top is provided with the steam heating of discharge steam
Main pipe, its underpart is provided with water inlet pipe, and the water inlet pipe is connected by pipeline with the water tank for being provided with external source.The afterheat of hot water pot
Stove, its water inlet pipe is connected also by pipeline with water tank, and its outlet pipe is connected by water tank with cooling water pipe, the cooling water pipe enters,
Delivery port is connected with water tank, and cooling water pipe is located in cooling tower, and the cooling tower bottom is provided with cold air air inlet, and top is provided with
Hot-air gas outlet.Best cooling tower top is provided with air-introduced machine；Cooling tower top is additionally provided with watering mechanism, then from hot-air
What gas outlet excluded is then saturation Hot wet air heating.
The method of the present invention is specific as follows：
1st, after strip is incubated in full-hydrogen hood-type annealing furnace and terminates, open from full-hydrogen hood-type annealing furnace inner cover and steam waste heat
High-temperature gas butterfly valve between boiler, the high-temperature hydrogen in full-hydrogen hood-type annealing furnace inner cover enters boiler using steam residual-heat, generation
Steam delivers to requirement unit by steam heating main pipe；
2nd, further cooled down into afterheat of hot water boiler by after the high-temperature hydrogen temperature reduction of boiler using steam residual-heat,
Water tank is delivered to by afterheat of hot water boiler discharging tube after the heat of the water absorption high-temperature hydrogen in afterheat of hot water boiler；
3rd, the high-temperature gas butterfly valve between afterheat of hot water boiler and Magnetic drive No leakage blower fan is opened, will be from afterheat of hot water pot
Low temperature hydrogen in stove out, delivers to Magnetic drive No leakage blower fan, while open Magnetic drive No leakage blower fan being moved back with perhydro bell-type
High-temperature gas butterfly valve between stove inner cover, during low temperature hydrogen delivered into full-hydrogen hood-type annealing furnace inner cover, to entering into cooling section
Strip carry out cooling heat transferring, according to this circulation carry out；
4th, in cyclic process, water tank is respectively steaming by boiler using steam residual-heat water inlet pipe, afterheat of hot water boiler water inlet pipe
Vapour waste heat boiler, afterheat of hot water boiler water-filling source；Afterheat of hot water boiler is back to the hot water of water tank by cooling water pipe simultaneously
In returning water tank after being exchanged heat with cooling tower.
The present invention has the following advantages that compared to existing technology：
(1) present invention is by while waste heat recovery, the hydrogen to inner cover carries out cooling by water in strip annealing process,
Strip is exchanged heat into annealing furnace inner cover with the hydrogen after cooling, heat transfer temperature difference is increased, heat exchange rate is improve, made whole
The individual annealing process time greatly shortens, using this invention after, the hot hydrogen for changing original traditional handicraft is transferred heat to by inner cover
The indirect heat transfer of the cold wind on the outside of inner cover, but temperature reduction directly cools down strip again after using hot hydrogen heat release to reclaim, very
Big degree improves rate of temperature fall；
(2) steam and hot water supply the production technology heat produced after exchanging heat, discharge and carry to reach energy saving, reduction
The target of high efficiency；
(3) for enterprise cuts down expenses, good economic benefit and social effect is brought.
Brief description of the drawings
Fig. 1 is flow simplified schematic diagram of the present invention.
Fig. 2 is hydrogen recycle stream journey simplified schematic diagram of the present invention.
Fig. 3 is water tank of the present invention and cooling tower flow simplified schematic diagram.
In figure：1st, full-hydrogen hood-type annealing furnace, 2, hydrogen circulation line, 3, Magnetic drive No leakage blower fan, 4, afterheat of hot water pot
Stove, 5, boiler using steam residual-heat, 6, high-temperature gas butterfly valve, 7, water tank, 8, air-introduced machine, 9, cooling water pipe, 10, watering mechanism.
Specific embodiment
In the flow simplified schematic diagram of the full-hydrogen hood-type annealing furnace waste heat recovery comprehensive utilization device shown in Fig. 1 and Fig. 2, entirely
The inner cover of hydrogen bell type annealing furnace 1 is connected with boiler using steam residual-heat 5, afterheat of hot water boiler 4, static state in turn by hydrogen circulation pipe 2
Sealing Magnetic drive No leakage blower fan 3, is finally connected with full-hydrogen hood-type annealing furnace inner cover again；The hydrogen circulation pipe uses high temperature resistant
Stainless steel, and seal setting with the inner cover of full-hydrogen hood-type annealing furnace.On except each hydrogen circulation line between two boilers
High-temperature gas butterfly valve 6 is equipped with, i.e., is set on the hydrogen circulation pipe between full-hydrogen hood-type annealing furnace inner cover and boiler using steam residual-heat
There is high-temperature gas butterfly valve, high-temperature gas is provided with the hydrogen circulation pipe between afterheat of hot water boiler and Magnetic drive No leakage blower fan
Butterfly valve, high-temperature gas butterfly is provided with the hydrogen circulation pipe between Magnetic drive No leakage blower fan and full-hydrogen hood-type annealing furnace inner cover
Valve.The high-temperature gas butterfly valve uses the patented products of Patent No. ZL 98 2 17879.4, and by Q/ZXD 05-2006《High temperature
Regulation and control butterfly valve》Manufacture and design standard to be manufactured.Thermocouple temperature measuring apparatus are set on hydrogen circulation pipe.The steam waste heat pot
Stove, its top is provided with the steam heating main pipe of discharge steam, and its underpart is provided with water inlet pipe, and the water inlet pipe passes through pipeline and is provided with outer
The water tank 7 at boundary water source is connected.The afterheat of hot water boiler, its water inlet pipe is connected also by pipeline with water tank, and its outlet pipe passes through
Water tank is connected with cooling water pipe 9, and the cooling water pipe entery and delivery port is connected with water tank, and cooling water pipe is located in cooling tower, and this is cold
But tower bottom is provided with cold air air inlet, and top is provided with hot-air gas outlet.Cooling tower top is provided with air-introduced machine 8；On cooling tower
Portion is additionally provided with watering mechanism 10, then from hot-air gas outlet exclude then be saturation Hot wet air heating, as shown in Figure 3.
Embodiment 1
Strip is incubated after terminating in full-hydrogen hood-type annealing furnace, opens from full-hydrogen hood-type annealing furnace inner cover and steam waste heat pot
High-temperature gas butterfly valve between stove, the high-temperature hydrogen in full-hydrogen hood-type annealing furnace inner cover enters boiler using steam residual-heat, steam waste heat
Boiler sets steam pressure 0.6MPa, and 150 DEG C of saturation temperature, the steam of generation delivers to requirement unit by steam heating main pipe；
180 DEG C are reduced to by the high-temperature hydrogen temperature of boiler using steam residual-heat, are further cooled down subsequently into afterheat of hot water boiler,
Water tank is delivered to by afterheat of hot water boiler discharging tube after the heat of the water absorption high-temperature hydrogen in afterheat of hot water boiler；Open hot water
High-temperature gas butterfly valve between waste heat boiler and Magnetic drive No leakage blower fan, by the low temperature hydrogen from afterheat of hot water boiler out
Gas, temperature is 50 DEG C, delivers to Magnetic drive No leakage blower fan, while opening in Magnetic drive No leakage blower fan and full-hydrogen hood-type annealing furnace
High-temperature gas butterfly valve between cover, during low temperature hydrogen delivered into full-hydrogen hood-type annealing furnace inner cover, the strip to entering into cooling section
Cooling heat transferring is carried out, circulation according to this is carried out；In cyclic process, water tank is by boiler using steam residual-heat water inlet pipe, afterheat of hot water pot
Stove water inlet pipe is respectively boiler using steam residual-heat, afterheat of hot water boiler water-filling source；Afterheat of hot water boiler is back to water tank simultaneously
60 DEG C of hot water exchanged heat by cooling water pipe and cooling tower after during 40 DEG C of water temperature returns water tank.
Embodiment 2
Strip is incubated after terminating in full-hydrogen hood-type annealing furnace, opens from full-hydrogen hood-type annealing furnace inner cover and steam waste heat pot
High-temperature gas butterfly valve between stove, the high-temperature hydrogen in full-hydrogen hood-type annealing furnace inner cover enters boiler using steam residual-heat, steam waste heat
Boiler sets steam pressure 1.0MPa, and 180 DEG C of saturation temperature, the steam of generation delivers to requirement unit by steam heating main pipe；
220 DEG C are reduced to by the high-temperature hydrogen temperature of boiler using steam residual-heat, are further cooled down subsequently into afterheat of hot water boiler,
Water tank is delivered to by afterheat of hot water boiler discharging tube after the heat of the water absorption high-temperature hydrogen in afterheat of hot water boiler；Open hot water
High-temperature gas butterfly valve between waste heat boiler and Magnetic drive No leakage blower fan, by the low temperature hydrogen from afterheat of hot water boiler out
Gas, temperature is 70 DEG C, delivers to Magnetic drive No leakage blower fan, while opening in Magnetic drive No leakage blower fan and full-hydrogen hood-type annealing furnace
High-temperature gas butterfly valve between cover, during low temperature hydrogen delivered into full-hydrogen hood-type annealing furnace inner cover, the strip to entering into cooling section
Cooling heat transferring is carried out, circulation according to this is carried out；In cyclic process, water tank is by boiler using steam residual-heat water inlet pipe, afterheat of hot water pot
Stove water inlet pipe is respectively boiler using steam residual-heat, afterheat of hot water boiler water-filling source；Afterheat of hot water boiler is back to water tank simultaneously
60 DEG C of hot water exchanged heat by cooling water pipe and cooling tower after during 40 DEG C of water temperature returns water tank.
Claims (4)
1. a kind of full-hydrogen hood-type annealing furnace waste heat recovery comprehensive utilization device, it is characterised in that：The inner cover of full-hydrogen hood-type annealing furnace
Boiler using steam residual-heat, afterheat of hot water boiler, Magnetic drive No leakage blower fan are connected with turn by hydrogen circulation pipe, finally again with entirely
Hydrogen bell type annealing furnace internal casing is connected；And high-temperature gas butterfly valve is equipped with except each hydrogen circulation line between two boilers,
The boiler using steam residual-heat, its top is provided with the steam heating main pipe of discharge steam, and its underpart is provided with water inlet pipe, and the water inlet pipe leads to
Cross pipeline and be connected with the water tank for being provided with external source, the afterheat of hot water boiler, its water inlet pipe is connected also by pipeline with water tank,
Its outlet pipe is connected by water tank with cooling water pipe, and the cooling water pipe entery and delivery port is connected with water tank, and cooling water pipe is located at cold
But in tower, the cooling tower bottom is provided with cold air air inlet, and top is provided with hot-air gas outlet.
2. according to claim 1, full-hydrogen hood-type annealing furnace waste heat recovery comprehensive utilization device, it is characterised in that：In hydrogen
Thermocouple temperature measuring apparatus are set on gas circulation pipe.
3. according to claim 1, full-hydrogen hood-type annealing furnace waste heat recovery comprehensive utilization device, it is characterised in that：Cooling
Tower top is provided with air-introduced machine.
4. the full-hydrogen hood-type annealing furnace waste heat recovery method of comprehensive utilization of claim 1, it is characterised in that：
1) after strip is incubated in full-hydrogen hood-type annealing furnace and terminates, open from full-hydrogen hood-type annealing furnace inner cover and boiler using steam residual-heat
Between high-temperature gas butterfly valve, the high-temperature hydrogen in full-hydrogen hood-type annealing furnace inner cover enters boiler using steam residual-heat, the steam of generation
Requirement unit is delivered to by steam heating main pipe；
2) further cooled down into afterheat of hot water boiler by after the high-temperature hydrogen temperature reduction of boiler using steam residual-heat, hot water
Water tank is delivered to by afterheat of hot water boiler discharging tube after the heat of the water absorption high-temperature hydrogen in waste heat boiler；
3) the high-temperature gas butterfly valve between afterheat of hot water boiler and Magnetic drive No leakage blower fan is opened, will be from afterheat of hot water boiler
Low temperature hydrogen out, delivers to Magnetic drive No leakage blower fan, while opening Magnetic drive No leakage blower fan and full-hydrogen hood-type annealing furnace
High-temperature gas butterfly valve between inner cover, during low temperature hydrogen delivered into full-hydrogen hood-type annealing furnace inner cover, the band to entering into cooling section
Steel carries out cooling heat transferring, and circulation according to this is carried out；
4) in cyclic process, water tank is respectively more than steam by boiler using steam residual-heat water inlet pipe, afterheat of hot water boiler water inlet pipe
Heat boiler, afterheat of hot water boiler water-filling source；Simultaneously afterheat of hot water boiler be back to the hot water of water tank by cooling water pipe with it is cold
But in returning water tank after tower is exchanged heat.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611222345.7A CN106755940A (en) | 2016-12-27 | 2016-12-27 | A kind of full-hydrogen hood-type annealing furnace waste heat recovery method of comprehensive utilization and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611222345.7A CN106755940A (en) | 2016-12-27 | 2016-12-27 | A kind of full-hydrogen hood-type annealing furnace waste heat recovery method of comprehensive utilization and device |
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Cited By (2)
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| CN108588398A (en) * | 2018-07-10 | 2018-09-28 | 杭州大策新能源有限公司 | Heat circulation recovery method and device |
| CN114525384A (en) * | 2022-02-21 | 2022-05-24 | 江苏苏讯新材料科技股份有限公司 | Steel coil annealing waste heat utilization system |
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Application publication date: 20170531 |