CN204644401U - A kind of have the continuous annealing furnace that protection gas reclaims function - Google Patents
A kind of have the continuous annealing furnace that protection gas reclaims function Download PDFInfo
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- CN204644401U CN204644401U CN201520363797.1U CN201520363797U CN204644401U CN 204644401 U CN204644401 U CN 204644401U CN 201520363797 U CN201520363797 U CN 201520363797U CN 204644401 U CN204644401 U CN 204644401U
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Abstract
The utility model relates to a kind of continuous annealing furnace with protection gas recovery function; comprise furnace body, purifying treatment is carried out to the protection gas of discharging in furnace body and send the protection gas recycle device of recycle in furnace body back to; the protection gas import of protection gas recycle device is connected with the protection gas relief outlet of furnace body, and the protection gas outlet of protection gas recycle device is connected with the protection gas admission port of furnace body.Protection gas recycle device comprise contaminant filter unit for filtering the solid impurity in protection gas, for filter the oxygen in protection gas oxygen filtering unit, for filtering water filter unit, the Controlling System of the water in protection gas; Controlling System connects with signal with contaminant filter unit, oxygen filtering unit, water filter unit respectively.The utility model can make full use of protection gas, saves the energy, is adapted to the developing direction of energy-saving and emission-reduction, has significant economic benefit and social benefit.
Description
Technical field
The utility model relates to a kind of continuous annealing furnace, and especially a kind of protection gas that adopts is to provide the continuous annealing furnace with protection gas recovery function of furnace atmosphere.
Background technology
Carrying out in annealing continuous annealing furnace to steel band, in order to during startup after the atmosphere opening of stove or under air to invade in stove the situations such as atmosphere gas, moisture in stove, oxygen concn are reduced, and extensively adopt with the following method: improve in-furnace temperature to make the moisture vaporization in stove, and in the front and back of gasification, the non-oxidizing gas such as rare gas element are supplied in stove as the substitution gas of atmosphere gas in stove, discharge the gas in stove simultaneously, thus atmosphere gas in stove is replaced into non-oxidizing gas.
Along with the specification of quality of market to steel band is more and more higher, as Galvanized Steel Strip, aluminum-zinc alloy steel band; alloy plating steel band etc., require higher strip anneal technique at this type of strip product, it is also higher to the requirement of protective atmosphere; usual need add the gas of a large amount of reductibility, as conduct protection gas such as hydrogen.Generally speaking in protection gas, hydrogen content is 10% ~ 50%, and hydrogen richness 20% ~ 30% in concrete galvanizing line protection gas, hydrogen richness 30% ~ 50% in gas protected by zinc-plated aluminum steel.
Strip anneal, refer to that the steel plate after cold rolling scraping carries out high temperature continuous annealing under the environment having protection gas, strip anneal process is a continuous continual process.In existing strip anneal technique, except just starting shove charge and annealing end is come out of the stove with except nitrogen replacement, other time all lead to the mixed gas of nitrogen and hydrogen as protecting gas.But the tolerance passing into hydrogen in the protection gas of a steel strip annealing furnace is 200 ~ 500Nm
3/ h, this part hydrogen shield gas active loss gas in operational process only has 5% ~ 8%, and residue protection hydrogen then directly burns or emptying to air, wastes ample resources.
Therefore, design and develop a kind of annealing furnace equipment that the protection gas of discharge can be carried out recycle and reuse, have great importance.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of recycle and reuse to protect gas, to accomplish the continuous annealing furnace with protection gas recovery function of energy-saving and emission-reduction.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of have the continuous annealing furnace that protection gas reclaims function; comprise furnace body; it also comprises and carries out purifying treatment to the protection gas of discharging in described furnace body and the protection gas recycle device of sending recycle in described furnace body back to; described protection gas recycle device has protection gas import and the outlet of protection gas; described protection gas import is connected with the protection gas relief outlet of described furnace body, and described protection gas outlet is connected with the protection gas admission port of described furnace body.
Preferably, described protection gas recycle device comprise contaminant filter unit for filtering the solid impurity in described protection gas, for filter the oxygen in described protection gas oxygen filtering unit, for filtering water filter unit, the Controlling System of the water in described protection gas; Described Controlling System connects with signal with described contaminant filter unit, described oxygen filtering unit, described water filter unit respectively; The protection gas admission port of the protection gas relief outlet of described furnace body, described contaminant filter unit, described oxygen filtering unit, described water filter unit, described furnace body is connected successively by gas circuit; be provided with intake valve between the protection gas relief outlet of described furnace body and described contaminant filter unit, between the protection gas relief outlet of described water filter unit and described furnace body, be provided with air outlet valve.
Further, described contaminant filter unit comprises the one-level contaminant filter and secondary contaminant filter that are connected successively by described gas circuit.
Further, described one-level contaminant filter is the cyclonic separator of the solid impurity described in preliminary filtering separation, and described secondary contaminant filter is the eluting column of the solid impurity described in filtering separation further by drip washing.
Further, the described gas circuit between the protection gas relief outlet of described furnace body and described one-level contaminant filter is provided with backing condenser; Described gas circuit between described one-level contaminant filter and described secondary contaminant filter is disposed with prime surge tank, backing condenser and gas blower.
Further, the described gas circuit between described one-level contaminant filter and described prime surge tank is provided with forepressure transmitter, described forepressure transmitter and described Controlling System connect with signal; The air outlet of described gas blower has back the backflow gas circuit being connected to its inlet mouth, and described backflow gas circuit is provided with return valve and backflow sequencing valve, described backflow sequencing valve and described Controlling System connect with signal.
Further, described oxygen filtering unit comprises deoxygenator.
Further, described water filter unit comprises the rear class water cooler, rear class condenser and the drying installation that are connected successively by described gas circuit.
Further, the described gas circuit that the outlet of described water filtering device connects is provided with rear class pressure unit, and described rear class pressure unit and described Controlling System connect with signal; The described gas circuit that the outlet of described contaminant filter unit connects is provided with emptying branch road, and described emptying branch road is provided with automatic evacuation sequencing valve, and described automatic evacuation sequencing valve and described Controlling System connect with signal.
Further; described gas circuit between the protection gas admission port of described water filter unit and described furnace body is provided with gas mixing units; described gas mixing units comprises rear class surge tank; described rear class surge tank is connected to a road nitrogen and supplements branch road and hydrogen make branch road; the described gas circuit that the import of described rear class surge tank connects is provided with on-line intelligence gas analyzer, and described on-line intelligence gas analyzer and described Controlling System connect with signal.
Because technique scheme is used; the utility model compared with prior art has following advantages: annealing furnace device of the present utility model can have protection gas recycle device; protection gas can be made full use of; avoid protection gas directly to burn or and that bring problem emptying to air; greatly save the energy; be adapted to the developing direction of energy-saving and emission-reduction, there is significant economic benefit and social benefit.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation with the continuous annealing furnace of protection gas recovery function of the present utility model.
In above accompanying drawing: E1, there is the furnace body of continuous annealing furnace that protection gas reclaims function; E2, backing condenser; E3, cyclonic separator; E4, prime surge tank; E5 backing condenser; E6, eluting column; E7, deoxygenator; E8, rear class water cooler; E9, rear class condenser; E10, drying installation; E11, rear class surge tank; E12, hydrogen-holder; E13, nitrogen storage tank; F, flexible connection structure; P, gas blower; V1, intake valve; V2, backflow sequencing valve; V3, return valve; V4, automatic evacuation sequencing valve; V5, air outlet valve; V6, hydrogen make sequencing valve; V7, nitrogen supplement sequencing valve; V8, pressure regulator valve; A1, micro-oxygen analyzer; V2, hydrogen analyser; V3, dew point analysis instrument; PT1, forepressure transmitter; PT2, rear class pressure unit.
Embodiment
Below in conjunction with embodiment shown in the drawings, the utility model is further described.
Embodiment one: as shown in Figure 1, a kind of have the continuous annealing furnace that protection gas reclaims function, comprises furnace body E1 and protection gas recycle device.Furnace body E1 has for passing into the protection gas admission port of protection gas and discharging the protection gas relief outlet of protection gas, the two lays respectively at the both ends of furnace body E1.The protection gas passed in furnace body E1 is the mixed gas of hydrogen and nitrogen, and the protection gas of discharging in furnace body E1 is then for containing compositions such as a small amount of solid impurity (dust and fine particle), oxygen, main component is the mixed gas (about 600 DEG C) of hydrogen and nitrogen.
The protection gas recycle device be connected with furnace body E1 is for carrying out purifying treatment to the protection gas of discharging in furnace body E1 and sending recycle in furnace body E1 back to; therefore, the protection gas that can not directly again utilize containing compositions such as a small amount of solid impurity and oxygen can be transformed into the protection gas that can utilize by it.
This protection gas recycle device has protection gas import and the outlet of protection gas, and the import of protection gas is connected with the protection gas relief outlet of furnace body E1, and the outlet of protection gas is connected with the protection gas admission port of furnace body E1.Thus, by the protection gas relief outlet of furnace body E1 discharge containing the composition such as a small amount of solid impurity and oxygen protection gas through overprotection gas recycle device purifying treatment and again return in furnace body E1.
Concrete; this protection gas recycle device comprises contaminant filter unit, oxygen filtering unit, water filter unit and Controlling System; wherein; contaminant filter unit, oxygen filtering unit, water filter unit are connected successively by gas circuit; intake valve V1 is provided with between the protection gas relief outlet of furnace body E1 and contaminant filter unit; it is as first-class in elastic connecting that the protection gas relief outlet of furnace body E1 goes out to be provided with flexible connection structure F() connect gas circuit; thus the vibration of buffering furnace body E1, be provided with air outlet valve V5 between the protection gas relief outlet of water filter unit and furnace body E1.Controlling System then connects with signal with contaminant filter unit, oxygen filtering unit, water filter unit respectively, thus for controlling the work of whole protection gas recycle device.
Contaminant filter unit is for filtering the solid impurity in protection gas, and it comprises the one-level contaminant filter and secondary contaminant filter that are connected by gas circuit.In the present embodiment, one-level contaminant filter adopts cyclonic separator E3, and it can preliminary filtering separation solid impurity, and secondary contaminant filter adopts eluting column E6, its can by drip washing further filtering separation solid impurity.The protection gas relief outlet of the furnace body E1 gas circuit after intake valve V1 and between one-level contaminant filter is provided with backing condenser E2, and namely the inlet mouth of backing condenser E2 becomes the protection gas import of protection gas recycle device; And gas circuit between one-level contaminant filter and secondary contaminant filter is disposed with prime surge tank E4, backing condenser E5 and gas blower P.Here gas blower P selects Root's blower.The one-piece construction of this contaminant filter unit is: the import of backing condenser E2 is connected to the protection gas relief outlet of furnace body E1 through intake valve V1, the outlet of backing condenser E2 is connected with the import of cyclonic separator E3, the outlet of cyclonic separator E3 is connected with the import of prime surge tank E4, the outlet of prime surge tank E4 is connected with the import of backing condenser E5, the outlet of backing condenser E5 is connected with the import of Root's blower P, the outlet of Root's blower P is connected with the import of eluting column E6, the outlet of eluting column E6 is the outlet of contaminant filter unit.The air outlet of gas blower P has back the backflow gas circuit being connected to its inlet mouth, and backflow gas circuit is provided with return valve V3 and backflow sequencing valve V2, backflow sequencing valve V2 and Controlling System connect with signal.In one-level contaminant filter, the gas circuit namely between cyclonic separator E3 and prime surge tank E4 is provided with forepressure transmitter PT1, forepressure transmitter PT1 and Controlling System connect with signal.The gas circuit that the outlet of contaminant filter unit connects is provided with emptying branch road, and emptying branch road is provided with automatic evacuation sequencing valve V4, automatic evacuation sequencing valve V4 and Controlling System connect with signal.
Oxygen filtering unit is for filtering the oxygen in protection gas, and it comprises the deoxygenator E7 with import and outlet, and its import is connected with the outlet of the eluting column of contaminant filter unit, and its outlet is then connected to water filter unit.
Water filter unit is for filtering the water of the water in protection gas; it comprises the rear class water cooler E8, rear class condenser E9 and the drying installation E10 that are connected successively by gas circuit; namely the import of rear class water cooler E8 is connected with the outlet of deoxygenator E7; the outlet of rear class water cooler E8 is connected with the import of rear class condenser E9; the outlet of rear class condenser E9 is connected with the inlet mouth of drying installation E10, and the air outlet of drying installation E10 is the outlet of water filter unit.Wherein, drying installation E10 adopts absorption regeneration formula drying installation E10; the protection gas through the acquisition of foregoing impurities filtering unit, oxygen filtering unit and part water filter unit passed into wherein had both passed in this absorption regeneration formula drying installation E10 and had carried out drying; also as the resurgent gases of this drying installation E10, the resurgent gases outlet of this drying installation E10 is then connected to prime surge tank E4.The outlet of water filtering device, the gas circuit that namely air outlet of drying installation E10 connects is provided with rear class pressure unit PT2, rear class pressure unit PT2 and Controlling System connect with signal.
Between the protection gas admission port of water filter unit and furnace body E1, the gas circuit namely between drying installation E10 and air outlet valve V5 is provided with gas mixing units.This gas mixing units comprises the rear class surge tank E11 that an import is connected with the air outlet of drying installation E10, the gas circuit that this import of rear class surge tank E11 connects is provided with on-line intelligence gas analyzer (comprising micro-oxygen analyzer A1, hydrogen analyser A2 and dew point analysis instrument A3), and on-line intelligence gas analyzer and Controlling System connect with signal.Another import of rear class surge tank E11 is also connected to a road nitrogen and supplements branch road and hydrogen make branch road.Nitrogen supplements branch road and comprises the nitrogen storage tank E13 be connected with Nitrogen source gases, the gas circuit be connected is provided with nitrogen and supplements sequencing valve V7 and pressure regulator valve V8 between this nitrogen storage tank E13 with rear class surge tank E11.Hydrogen make branch road comprises the hydrogen-holder E12 be connected with hydrogen source gas, the gas circuit be connected is provided with hydrogen make sequencing valve V6 between this hydrogen-holder E12 with rear class surge tank E11.Above-mentioned nitrogen supplements sequencing valve V7 and hydrogen make sequencing valve V6 connects with signal with Controlling System respectively.
This working process with the continuous annealing furnace of protection gas recovery function is:
From the nitrogen and hydrogen mixture containing the composition such as solid impurity and oxygen that the furnace body E1 of continuous annealing furnace discharges, first backing condenser E2 is entered, the high temperature nitrogen and hydrogen mixture reclaimed is cooled, nitrogen and hydrogen mixture enters cyclonic separator E3 subsequently, the preliminary dust will carried secretly in hydrogen nitrogen mixed gas, fine particle (iron powder, zinc gray etc.) carry out filtering separation, after hydrogen nitrogen mixed gas after cyclonic separation enters the voltage stabilizing of prime surge tank E4 buffering, enter backing condenser E5 to cool further, enter Root's blower P subsequently and carry out variable frequency control supercharging (being pressurized to 10 ~ 50Kpa), nitrogen and hydrogen mixture after supercharging enters eluting column E6(as patent No. eluting column E6 disclosed in the patent of 200920241767.8), wash away the dust and molecule impurity that carry in nitrogen and hydrogen mixture further, enter in deoxygenator E7 through the nitrogen and hydrogen mixture of drip washing and carry out deoxygenation, nitrogen and hydrogen mixture after deoxygenation enters rear class water cooler E8 successively, rear class condenser E9 carries out cooling de-watering, removing, by the water generated in deoxygenator E7, can reach 0 ~ 10 DEG C through the cooled gas dew point of deoxygenation, nitrogen and hydrogen mixture after deoxygenation cooling down dewaters enters absorption regeneration formula drying installation E10 and dewaters, and again purifies after coming back to prime surge tank E4 as the gas of drying installation E10 resurgent gases, except the nitrogen and hydrogen mixture after Water warfare, the index of its gas is by online on-line intelligence gas analyzer: obtain gas index after micro-oxygen analyzer A1, hydrogen analyser A2 and dew point analysis instrument A3 analyze as follows: containing oxygen: 0.3ppm, hydrogen richness: 35%, gas dew point :-68 DEG C, after purification, nitrogen and hydrogen mixture controls top hole pressure and flow by self-supporting regulation valve group, and the unstripped gas supply annealing furnace body E1 as protection gas uses as protection gas.
For keeping the steady running of this annealing furnace system and the controlled of system pressure, be provided with multiple sequencing valve and pressure regulator valve V8 in system, comprise the backflow sequencing valve V2 of gas blower P, automatic evacuation sequencing valve V4, hydrogen make sequencing valve V6, the nitrogen nitrogen supplemented on branch road supplement sequencing valve V7 and pressure regulator valve V8 and gas blower P refluxes in gas circuit return valve V3.When forepressure transmitter PT1 detect Root's blower P backing system pressure lower or backing system pressure anomaly (taking out negative pressure) time, Controlling System controls to open the backflow sequencing valve V2 in gas blower P backflow gas circuit, now return valve V3 has opened pressure regulation pattern, make gas backstreaming in rear level system to prime, keeping system safety; When rear class pressure unit PT2 detects rear class system pressure superpressure or gas index is defective, Controlling System controls automatic evacuation sequencing valve V4 and opens exhaust; When rear class system pressure is lower than setting pressure, and when in system, hydrogen analyser A2 detects that the hydrogen purity that hydrogen purity comparatively sets is low, hydrogen make sequencing valve V6 opens benefit hydrogen automatically, and when hydrogen purity in system comparatively sets hydrogen purity height, nitrogen supplements sequencing valve V7 and pressure regulator valve V8 and automatically opens and mend nitrogen or simultaneously hydrogen make-up or nitrogen, guarantees device security steady running.
The protection gas recycle device recover hydrogen that this annealing furnace is equipped with by cooling down, supercharging, drip washing dedusting, deoxygenation, the purifying treatment such as dewater; obtain qualified protection gas and enter continuous annealing furnace use again; it can realize full application of brake and control; and can zero release be accomplished in scavenging process; in the hope of accomplishing the use cost reducing hydrogen, accomplish energy-saving and emission-reduction truly.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences done according to the utility model spirit change or modify, and all should be encompassed within protection domain of the present utility model.
Claims (10)
1. one kind has the continuous annealing furnace that protection gas reclaims function; comprise furnace body; it is characterized in that: it also comprises and carries out purifying treatment to the protection gas of discharging in described furnace body and the protection gas recycle device of sending recycle in described furnace body back to; described protection gas recycle device has protection gas import and the outlet of protection gas; described protection gas import is connected with the protection gas relief outlet of described furnace body, and described protection gas outlet is connected with the protection gas admission port of described furnace body.
2. according to claim 1 a kind ofly have protection gas and reclaim the continuous annealing furnace of function, it is characterized in that: described protection gas recycle device comprise contaminant filter unit for filtering the solid impurity in described protection gas, for filter the oxygen in described protection gas oxygen filtering unit, for filtering water filter unit, the Controlling System of the water in described protection gas; Described Controlling System connects with signal with described contaminant filter unit, described oxygen filtering unit, described water filter unit respectively; The protection gas admission port of the protection gas relief outlet of described furnace body, described contaminant filter unit, described oxygen filtering unit, described water filter unit, described furnace body is connected successively by gas circuit; be provided with intake valve between the protection gas relief outlet of described furnace body and described contaminant filter unit, between the protection gas relief outlet of described water filter unit and described furnace body, be provided with air outlet valve.
3. a kind of continuous annealing furnace with protection gas recovery function according to claim 2, is characterized in that: described contaminant filter unit comprises the one-level contaminant filter and secondary contaminant filter that are connected successively by described gas circuit.
4. a kind of continuous annealing furnace with protection gas recovery function according to claim 3; it is characterized in that: described one-level contaminant filter is the cyclonic separator of the solid impurity described in preliminary filtering separation, described secondary contaminant filter is the eluting column of the solid impurity described in filtering separation further by drip washing.
5. a kind of continuous annealing furnace with protection gas recovery function according to claim 3, is characterized in that: the described gas circuit between the protection gas relief outlet of described furnace body and described one-level contaminant filter is provided with backing condenser; Described gas circuit between described one-level contaminant filter and described secondary contaminant filter is disposed with prime surge tank, backing condenser and gas blower.
6. a kind of continuous annealing furnace with protection gas recovery function according to claim 5, it is characterized in that: the described gas circuit between described one-level contaminant filter and described prime surge tank is provided with forepressure transmitter, described forepressure transmitter and described Controlling System connect with signal; The air outlet of described gas blower has back the backflow gas circuit being connected to its inlet mouth, and described backflow gas circuit is provided with return valve and backflow sequencing valve, described backflow sequencing valve and described Controlling System connect with signal.
7. a kind of continuous annealing furnace with protection gas recovery function according to claim 2, is characterized in that: described oxygen filtering unit comprises deoxygenator.
8. a kind of continuous annealing furnace with protection gas recovery function according to claim 2, is characterized in that: described water filter unit comprises the rear class water cooler, rear class condenser and the drying installation that are connected successively by described gas circuit.
9. a kind of continuous annealing furnace with protection gas recovery function according to claim 2, it is characterized in that: the described gas circuit that the outlet of described water filtering device connects is provided with rear class pressure unit, and described rear class pressure unit and described Controlling System connect with signal; The described gas circuit that the outlet of described contaminant filter unit connects is provided with emptying branch road, and described emptying branch road is provided with automatic evacuation sequencing valve, and described automatic evacuation sequencing valve and described Controlling System connect with signal.
10. a kind of continuous annealing furnace with protection gas recovery function according to any one of claim 2 to 9, it is characterized in that: the described gas circuit between the protection gas admission port of described water filter unit and described furnace body is provided with gas mixing units, described gas mixing units comprises rear class surge tank, described rear class surge tank is connected to a road nitrogen and supplements branch road and hydrogen make branch road, the described gas circuit that the import of described rear class surge tank connects is provided with on-line intelligence gas analyzer, described on-line intelligence gas analyzer and described Controlling System connect with signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520363797.1U CN204644401U (en) | 2015-06-01 | 2015-06-01 | A kind of have the continuous annealing furnace that protection gas reclaims function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520363797.1U CN204644401U (en) | 2015-06-01 | 2015-06-01 | A kind of have the continuous annealing furnace that protection gas reclaims function |
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| CN204644401U true CN204644401U (en) | 2015-09-16 |
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| CN201520363797.1U Expired - Fee Related CN204644401U (en) | 2015-06-01 | 2015-06-01 | A kind of have the continuous annealing furnace that protection gas reclaims function |
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Granted publication date: 20150916 Termination date: 20190601 |