CN108342564A - A kind of residual heat integrative utilizes, the ductile iron pipe production system of energy-saving and emission-reduction - Google Patents
A kind of residual heat integrative utilizes, the ductile iron pipe production system of energy-saving and emission-reduction Download PDFInfo
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- CN108342564A CN108342564A CN201810212951.3A CN201810212951A CN108342564A CN 108342564 A CN108342564 A CN 108342564A CN 201810212951 A CN201810212951 A CN 201810212951A CN 108342564 A CN108342564 A CN 108342564A
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- China
- Prior art keywords
- iron pipe
- ductile iron
- gas
- continuous annealing
- emission
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Classifications
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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
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
- C21D5/00—Heat treatments of cast-iron
Abstract
A kind of residual heat integrative utilization, the ductile iron pipe production system of energy-saving and emission-reduction, including continuous annealing furnace, several high temperature section burners on continuous annealing furnace furnace wall, low-temperature zone burner, gas mixer, air heat exchanger, air blower, it is connected with the hot wind output end of air heat exchanger, and the furnace cupola being connected with the flue gas input terminal of gas mixer, combustion fan, gas generator, charger, drive sprocket, pass through separately-driven two driven sprockets of two chain drives, ductile iron pipe material on chain pushes shift fork, material sliding support.Energy-saving and emission-reduction of the present invention, zero-emission, residual heat integrative utilize, and reduce comprehensive energy consumption, reduce production cost, space is saved, equipment is reduced and takes up an area, simplify production process, improves production efficiency, annealing efficiency is high, speed is fast, high degree of automation, ensures that workpiece even tissue is consistent, workpiece quality is good.It can be widely applied in ductile iron pipe production process.
Description
Technical field
The present invention relates to a kind of residual heat integratives to utilize, the ductile iron pipe production system of energy-saving and emission-reduction, can be widely applied to
In ductile iron pipe production process.
Background technology
Annealing is a kind of metal heating processing technology, refers to metal being heated slowly to certain temperature, is kept for certain time,
Then it is cooled down with Reasonable Speed.The purpose of annealing is to obtain spheroidal graphite cast-iron tube workpiece of good performance.With the scarcity of resource
It shows to be more and more obvious, how to save fuel, reducing comprehensive energy consumption seems more and more urgent.Ductile iron pipe is gradually cooled down
Afterwards, a large amount of high-temperature hot air is discharged into outdoor, is wasted to cause a large amount of heat so that the recycling of resource
Rate is greatly reduced, while can also be adversely affected to the climatic environment of part.Utilization for this part hot-air comes at present
It sees, means are seldom.If this part hot wind heat sources can be efficiently used, it will be able to comprehensive energy consumption is effectively reduced, to drop
Low production cost.
Invention content
The purpose of the present invention is to provide a kind of energy-saving and emission-reduction, zero-emission, residual heat integratives to utilize, reduces comprehensive energy consumption, drop
Low production cost, save space, reduce equipment take up an area, simplify production process, improve production efficiency, annealing efficiency are high, speed is fast,
High degree of automation, the spheroidal graphite cast-iron for ensureing workpiece even tissue is consistent, the high-quality a kind of utilization of residual heat integrative, energy-saving and emission-reduction
Pipe production system.
In order to achieve the above object, the ductile iron pipe production system of a kind of residual heat integrative utilization of the present invention, energy-saving and emission-reduction,
The continuous annealing furnace for being used for ductile iron pipe continuous annealing including being equipped with hot room, low temperature chamber and cooling chamber successively, is mounted on
Several high temperature section burners on the hot room furnace wall of continuous annealing furnace for heating of annealing, are mounted on continuous annealing furnace
Low temperature chamber furnace wall on for several low-temperature zone burners heated of anneal, with high temperature section burner, low-temperature zone burner
The connected gas mixer of mixed gas pipeline input terminal, it is cooling for annealing in the cooling chamber of continuous annealing furnace
Air heat exchanger, the air blower being connected with the cooling wind input terminal of air heat exchanger, the hot wind output end with air heat exchanger
The furnace cupola for being connected and being connected with the flue gas input terminal of gas mixer, the combustion air input terminal phase with gas mixer
The combustion fan of connection, the gas generator being connected with the coal gas input terminal of gas mixer are mounted on gas generator
Charger, be mounted on continuous annealing furnace bottom on for ductile iron pipe material conveying two drive sprockets, pass through two
Separately-driven two driven sprockets of chain drive, the ductile iron pipe material being mounted on chain push shift fork, are mounted on
The ductile iron pipe material sliding support installed on continuous annealing furnace bottom and between two chains.
The ductile iron pipe production system of a kind of residual heat integrative utilization of the present invention, energy-saving and emission-reduction, operation principle are：
（1）High temperature section annealing in the hot room：Furnace cupola generate flue gas, gas generator production coal gas and by helping
It fires wind turbine and is sent into a certain proportion of air, these three gas flue gas, coal gas and air are generated mixed by the mixing of gas mixer
Gas is closed, in the high temperature section burner of mixed gas delivery to continuous annealing furnace hot room, in this coal gas, is released a large amount of
Thermal energy, so that the indoor temperature of hot room is reached 900 DEG C~950 DEG C.The unburnt flue gas of furnace cupola burns again, reduces
Soaring kiln gas discharge of poisonous waste, reduces the dosage of gas generator coal, reduces air output, combustion-supporting to decrease
The consumption of blower motor power.Therefore, zero-emission is realized in energy-saving and emission-reduction.
Ductile iron pipe is conveyed into the hot room of continuous annealing furnace, ductile iron pipe is in 900 DEG C~950 DEG C temperature
Lower high annealing stops 2h~5h in hot room.It anneals in high temperature section, is that ductile iron pipe can be heated to filling for cementite
Divide solution temperature, prepares for the decomposition and first stage graphitization of cementite, ensure free cementite energy in this functional areas
It fully decomposes, the free cementite in as-cast structure is made fully to be changed into austenite and graphite progress first stage graphitization.
（2）The low-temperature zone annealing：Furnace cupola generate flue gas, gas generator production coal gas and by combustion fan
It is sent into a certain proportion of air, these three gas flue gas, coal gas and air are mixed by gas mixer, generate gaseous mixture
Body in the low-temperature zone burner of mixed gas delivery to continuous annealing furnace, in this coal gas, is released a large amount of thermal energy, is made
The room temperature of low temperature chamber reaches 720 DEG C~760 DEG C.Equally, the unburnt flue gas of furnace cupola burns again, reduces furnace cupola cigarette
Gas discharge of poisonous waste reduces the dosage of gas generator coal, reduces air output, to decrease combustion fan motor
The consumption of power.Therefore, zero-emission is realized in energy-saving and emission-reduction.
By the ductile iron pipe by hot room annealing, it is transported to the low temperature chamber of continuous annealing furnace, ductile iron pipe exists
It anneals at a temperature of 720 DEG C~760 DEG C, 3h~6h is stopped in low temperature chamber.It anneals in low temperature chamber, is to ensure that carburizing is intimate fully
The tissue of decomposition can be quickly cooled to low-temperature zone temperature from high temperature section temperature, obtain ferrite, pearlite and graphite structure.
（3）The cooling section annealing：Cooling wind is conveyed into air heat exchanger by air blower, ductile iron pipe is fast
Speed is cooled to 600 DEG C hereinafter, carrying out cooling section annealing, and ductile iron pipe releases a large amount of thermal energy during being quickly cooled down, this
Sample can efficiently use the waste heat that cooling ductile iron pipe is released, and reduce the energy consumption that traditional type of cooling generates, be sent at this time soaring
The cold wind of stove is raised to 450 DEG C~600 DEG C by room temperature, and hot wind enhances foundry coke burning, improves soaring in-furnace temperature, real
The purpose that existing residual heat integrative utilizes.To improve molten iron temperature, silicomanganese scaling loss is reduced, improves iron liquid quality, casting quality is good.
Coke dosage is reduced, it is energy saving, furnace cupola can be made to accomplish " locked in " operation.
By the ductile iron pipe by low temperature chamber annealing, it is transported to the cooling chamber of continuous annealing furnace, is set in cooling chamber
Set air heat exchanger, cooling wind be conveyed by air heat exchanger by air blower, by ductile iron pipe be cooled fast to 600 DEG C with
Under, ductile iron pipe is quickly cooled down annealing at this temperature, in the hope of obtaining based on ferrite matrix including graphite and part pearl
The Nodular Iron of body of light tissue high ductibility, meanwhile, by 450 DEG C~600 DEG C heat by air heat exchanger heat exchange output
Wind is conveyed into Cupola Blast System and recycles.
The ductile iron pipe production system of a kind of residual heat integrative utilization of the present invention, energy-saving and emission-reduction, the flue gas that furnace cupola generates
By burning in the hot room of gas mixer blending transportation to continuous annealing furnace and the burner of low temperature chamber, fume afterheat is big
Amount is absorbed by coal gas, reduces heating fuel consumption.Meanwhile the carbon monoxide in flue gas fully burns, and makes full use of the energy, gives
Hot room, low temperature chamber heating, while soot emissions are reduced, energy-saving and emission-reduction.
The ductile iron pipe production system of a kind of residual heat integrative utilization of the present invention, energy-saving and emission-reduction, makes full use of spheroidal graphite cast-iron
Generated waste heat in pipe production process, the hot wind through air heat exchanger heat exchange is sent into furnace cupola, to generated waste heat air
It is comprehensively utilized, efficiently uses this part hot wind heat sources, it will be able to comprehensive energy consumption is effectively reduced, to reduce production
Cost.
The ductile iron pipe production system of a kind of residual heat integrative utilization of the present invention, energy-saving and emission-reduction, in continuous annealing furnace
Continuous annealing, the continuous annealing furnace that annealing function is integrated in one save space, reduce equipment and take up an area, simplify production process,
Improve production efficiency.
The ductile iron pipe production system of a kind of residual heat integrative utilization of the present invention, energy-saving and emission-reduction, using continous way annealing side
Formula, the continuous annealing furnace scientific structure design, annealing efficiency is high, and speed is fast, and high degree of automation, ductile iron pipe is continuous
The movement of discontinuity in formula annealing furnace keeps the path that every spheroidal graphite cast-iron tube workpiece passes through consistent, suffered by every workpiece
Temperature it is almost the same, ensure workpiece even tissue it is consistent, workpiece quality is good.
In conclusion a kind of residual heat integrative of the present invention utilizes, the ductile iron pipe production system of energy-saving and emission-reduction, it is energy saving to subtract
Row, zero-emission, residual heat integrative utilize, and reduce comprehensive energy consumption, reduce production cost, save space, reduce equipment and take up an area, simplify life
Process is produced, production efficiency is improved, annealing efficiency is high, and speed is fast, high degree of automation, ensures that workpiece even tissue is consistent, workpiece
It is high-quality.
Description of the drawings
The present invention is further described below in conjunction with attached drawing and embodiment.
Fig. 1 is the operation principle schematic diagram of the present invention；
Fig. 2 is that ductile iron pipe material of the present invention pushes shift fork and chain connection structure schematic diagram.
Specific implementation mode
In Fig. 1, Fig. 2, a kind of residual heat integrative of the present invention utilizes, the ductile iron pipe production system of energy-saving and emission-reduction, including
It is equipped with the continuous annealing furnace 1 that hot room 1-1, low temperature chamber 1-2 and cooling chamber 1-3 are used for ductile iron pipe continuous annealing successively,
Several high temperature section burners 2 on the hot room furnace wall of continuous annealing furnace for heating of annealing are mounted on continuous
Several low-temperature zone burners 3 on the low temperature chamber furnace wall of formula annealing furnace for heating of annealing, with high temperature section burner, low-temperature zone
Gas mixer 4 connected the mixed gas pipeline input terminal 4-1 of burner, the cooling for being mounted on continuous annealing furnace are indoor
In the cooling air heat exchanger 5 of annealing, the air blower 6 being connected with the cooling wind input terminal 5-1 of air heat exchanger is changed with air
The furnace cupola 7 that the hot wind output end 5-2 of hot device is connected, is connected with the flue gas input terminal 4-2 of gas mixer, it is mixed with gas
The combustion fan 8 that the combustion air input terminal 4-3 of clutch is connected, the coal being connected with the coal gas input terminal 4-4 of gas mixer
Gas producer 9, the charger 10 being mounted on gas generator are mounted on continuous annealing furnace bottom and are used for ductile iron pipe
Two drive sprockets 11 of material conveying, separately-driven two driven sprockets 12 are driven by two chains 15, are mounted on chain
Ductile iron pipe material on item pushes shift fork 13, is installed on continuous annealing furnace bottom and between two chains
16 material sliding support 14 of ductile iron pipe.
In addition, in Fig. 1, ductile iron pipe conveying direction a.
The ductile iron pipe production system of a kind of residual heat integrative utilization of the present invention, energy-saving and emission-reduction, embodiment described above is only
Only it is that the preferred embodiment of the present invention is described, not the scope of the present invention is defined, is not departing from the present invention
Under the premise of design spirit, various modifications and change that this field ordinary engineering and technical personnel makes technical scheme of the present invention
Into, should all fall into claims of the present invention determination protection domain in.
Claims (1)
1. a kind of residual heat integrative utilizes, the ductile iron pipe production system of energy-saving and emission-reduction, which is characterized in that including being equipped with height successively
Greenhouse, low temperature chamber and cooling chamber are used for the continuous annealing furnace of ductile iron pipe continuous annealing, are mounted on continuous annealing furnace
Several high temperature section burners on hot room furnace wall for heating of annealing, are mounted on the low temperature chamber furnace wall of continuous annealing furnace
It is defeated with the mixed gas pipeline of high temperature section burner, low-temperature zone burner for several low-temperature zone burners for heating of annealing
Enter the connected gas mixer in end, cooling air heat exchanger of annealing is used in the cooling chamber of continuous annealing furnace, with
The air blower that the cooling wind input terminal of air heat exchanger is connected, be connected with the hot wind output end of air heat exchanger and with gas
The furnace cupola that the flue gas input terminal of body mixer is connected, the combustion air being connected with the combustion air input terminal of gas mixer
Machine, the gas generator being connected with the coal gas input terminal of gas mixer, the charger being mounted on gas generator, installation
Two drive sprockets on continuous annealing furnace bottom for the conveying of ductile iron pipe material are distinguished by two chain drives
Two driven sprockets of driving, the ductile iron pipe material being mounted on chain push shift fork, are mounted on continuous annealing furnace bottom
The ductile iron pipe material sliding support installed in portion and between two chains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810212951.3A CN108342564A (en) | 2018-03-15 | 2018-03-15 | A kind of residual heat integrative utilizes, the ductile iron pipe production system of energy-saving and emission-reduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810212951.3A CN108342564A (en) | 2018-03-15 | 2018-03-15 | A kind of residual heat integrative utilizes, the ductile iron pipe production system of energy-saving and emission-reduction |
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| Publication Number | Publication Date |
|---|---|
| CN108342564A true CN108342564A (en) | 2018-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810212951.3A Pending CN108342564A (en) | 2018-03-15 | 2018-03-15 | A kind of residual heat integrative utilizes, the ductile iron pipe production system of energy-saving and emission-reduction |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202164333U (en) * | 2011-07-21 | 2012-03-14 | 新兴铸管股份有限公司 | Continuous annealing furnace for ductile iron pipes |
| CN103307889A (en) * | 2012-03-14 | 2013-09-18 | 段金挺 | Gradient utilization method for waste heat of cupola furnace |
-
2018
- 2018-03-15 CN CN201810212951.3A patent/CN108342564A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202164333U (en) * | 2011-07-21 | 2012-03-14 | 新兴铸管股份有限公司 | Continuous annealing furnace for ductile iron pipes |
| CN103307889A (en) * | 2012-03-14 | 2013-09-18 | 段金挺 | Gradient utilization method for waste heat of cupola furnace |
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Application publication date: 20180731 |
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