CN105402732A - Reductive smelting heat-accumulation type combustion system and smelting method using same - Google Patents
Reductive smelting heat-accumulation type combustion system and smelting method using same Download PDFInfo
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- CN105402732A CN105402732A CN201510900684.5A CN201510900684A CN105402732A CN 105402732 A CN105402732 A CN 105402732A CN 201510900684 A CN201510900684 A CN 201510900684A CN 105402732 A CN105402732 A CN 105402732A
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- heat storage
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- expansion chamber
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- 238000003723 Smelting Methods 0.000 title claims abstract description 84
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 47
- 238000009825 accumulation Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000002829 reductive effect Effects 0.000 title abstract 4
- 238000005338 heat storage Methods 0.000 claims abstract description 114
- 239000003034 coal gas Substances 0.000 claims abstract description 103
- 239000002918 waste heat Substances 0.000 claims abstract description 24
- 239000007789 gas Substances 0.000 claims description 178
- 230000001172 regenerating effect Effects 0.000 claims description 103
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 56
- 239000003546 flue gas Substances 0.000 claims description 56
- 239000000919 ceramic Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 20
- 238000011084 recovery Methods 0.000 claims description 17
- 239000002912 waste gas Substances 0.000 claims description 16
- 241000264877 Hippospongia communis Species 0.000 claims description 15
- 239000011324 bead Substances 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 10
- 241001417490 Sillaginidae Species 0.000 claims description 9
- 230000002000 scavenging effect Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 4
- 241001062472 Stokellia anisodon Species 0.000 claims description 3
- 239000000779 smoke Substances 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 description 9
- 238000007254 oxidation reaction Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000007499 fusion processing Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a reductive smelting heat-accumulation type combustion system and a smelting method using the same. The reductive smelting heat-accumulation type combustion system comprises a furnace body, a first nozzle, a second nozzle, a first heat accumulation device, a second heat accumulation device, a first air three-way valve, a first coal gas three-way valve, a second air three-way valve and a second coal gas three-way valve. The first heat accumulation device comprises a first shell. A first heat storage space is defined in the first shell. A first air heat accumulator, a first settling chamber, a first coal gas heat accumulator and a second settling chamber are arranged in the first heat storage space. The second heat accumulation device comprises a second shell. A second heat storage space is defined in the second shell. A second heat accumulator, a third settling chamber, a second coal gas heat accumulator and a fourth settling chamber are arranged in the second heat storage space. By the adoption of the reductive smelting heat-accumulation type combustion system, waste heat in smoke can be efficiently recovered, and thus the energy utilization rate is remarkably increased.
Description
Technical field
The invention belongs to technical field of smelting, specifically, the present invention relates to a kind of reducing and smelting regenerative combustion system and utilize this system to carry out the method for smelting.
Background technology
Combustion gas molten point of stove is perfect coal-based rotary hearth furnace direct-reduction-molten division technique, slag sluicing system process after smelting resources such as difficult ore dressing, lateritic nickel ore, vanadium titano-magnetite, sulfate slags plays vital effect, break the unicity of burried arc furnace smelting technology, a large amount of electric energy can be saved, also for the weak area of industrial foundation provides a kind of scheme of feasibility simultaneously.
Regenerative combustion technology is the most widely used energy-saving and environmental protection combustion technology in present stage industrial furnace, and this technology is quite ripe.But the thermic load that existing heat-storage type burner requires due to smelting process when melting the application on point stove is higher than smelting and heating load a lot, to produce exhaust gas volumn more, the volume of regenerator is relatively large, and the position of burner on body of heater is unreasonable, add site operation difficulty, and to installation, use, maintenance causes inconvenience, the dust that the type heat-storage type burner produces in smelting process simultaneously easily causes heat storage to block, heat storage replacement frequency is high, improve the operating cost of this kind of burner, in addition, this type heat-storage type burner is not considered from the angle of combustion efficiency, distribute about gas exit passage and air outlet passage, easy generation and air blending insufficient, efficiency of combustion is low, the nitrogen oxide of local temperature and generation crosses the problems such as high, cause material oxidization burning loss in smelting process.
Therefore, existing heat accumulating type smelting technique is further improved.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, one object of the present invention is to propose a kind of reducing and smelting regenerative combustion system and utilize this system to carry out the method for smelting, and this system can waste heat in high efficiente callback flue gas, thus significantly improves energy utilization rate.
In one aspect of the invention, the present invention proposes a kind of reducing and smelting regenerative combustion system, comprising:
Body of heater, described body of heater limits smelts space, the sidewall of described body of heater has igniter burner, the first perforate, the second perforate and material inlet;
First burner, described first burner is positioned at described first perforate, and described first burner has the first air port and the first gas port;
Second burner, described second burner is positioned at described second perforate, and described second burner has the second air port and the second gas port;
First regenerative apparatus, described first regenerative apparatus comprises:
First housing, the first heat accumulation space is limited in described first housing, along away from described body of heater direction, there is left expansion chamber and left heat storage successively in described first heat accumulation space, described left expansion chamber comprises the first expansion chamber and the second expansion chamber, described left heat storage comprises the first air heat storage and the first coal gas heat storage, described first air heat storage is connected with described first expansion chamber and is connected with described smelting space by described first air port, described first coal gas heat storage is connected with described second expansion chamber and is connected with described smelting space by described first gas port,
First air intake, described first air intake is formed on described first housing, and described first air intake is connected with described first air heat storage;
First gas entry, described first gas entry is formed on described first housing, and described first gas entry is connected with described first coal gas heat storage;
Second regenerative apparatus, described second regenerative apparatus comprises:
Second housing, the second heat accumulation space is limited in described second housing, along away from described body of heater direction, there is right expansion chamber and right heat storage successively in described second heat accumulation space, described right expansion chamber comprises the 3rd expansion chamber and the 4th expansion chamber, described right heat storage comprises the second air heat storage and the second coal gas heat storage, described second air heat storage is connected with described 3rd expansion chamber and is connected with described smelting space by described second air port, described second coal gas heat storage is connected with described 4th expansion chamber and is connected with described smelting space by described second gas port,
Second air intake, described second air intake is formed on described second housing, and described second air intake is connected with described second air heat storage;
Second gas entry, described second gas entry is formed on described second housing, and described second gas entry is connected with described second coal gas heat storage;
First air triple valve, described first air triple valve has the first air door, the first air exchange valve, the first air intlet, the first air off gas outlet and the first air outlet slit, and described first air outlet slit is connected with described first air intake;
First gas three-way valve, described first gas three-way valve has the first gas valve, the first coal gas scavenging air valve, the first gas inlet, the first coal gas waste gas outlet and the first gas exit, and described first gas exit is connected with described first gas entry;
Second air triple valve, described second air triple valve has the second air door, the second air exchange valve, the second air intlet, the second air off gas outlet and the second air outlet slit, and described second air outlet slit is connected with described second air intake; And
Second gas three-way valve, described second gas three-way valve has the second gas valve, the second coal gas scavenging air valve, the second gas inlet, the second coal gas waste gas outlet and the second gas exit, and described second gas exit is connected with described second gas entry,
Wherein,
The first high temperature section and the first low-temperature zone is limited in described first air heat storage, described first high temperature section is near described first expansion chamber, the second high temperature section and the second low-temperature zone is limited in described first coal gas heat storage, described second high temperature section is near described second expansion chamber, the top of described first high temperature section and described second high temperature section is filled with ceramic bead, the middle and lower part of described first high temperature section, the middle and lower part of described second high temperature section, described first low-temperature zone, described second low-temperature zone are filled with ceramic honey comb
Third high temperature section and the 3rd low-temperature zone is limited in described second air heat storage, described third high temperature section is near described 3rd expansion chamber, the 4th high temperature section and the 4th low-temperature zone is limited in described second coal gas heat storage, described 4th high temperature section is near described 4th expansion chamber, the top of described three high temperature section and described 4th high temperature section is filled with ceramic bead, and the middle and lower part of described third high temperature section, the middle and lower part of described 4th high temperature section, described 3rd low-temperature zone, described 4th low-temperature zone are filled with ceramic honey comb.
According to the reducing and smelting regenerative combustion system of the embodiment of the present invention by using independently burner, the system that one casting is more in the past formed is compared, destruction to body of heater when can effectively avoid changing burner, and coal gas and air are supplied to body of heater from the same side of body of heater, air and coal gas are fully mixed, thus significantly improve efficiency of combustion, and more in the past both sides respectively air supply compare with coal gas, effectively can avoid the selective oxidation of material, in regenerative apparatus, adopt ceramic bead heat storage and honeycomb ceramic heat accumulator to combine simultaneously carry out accumulation of heat, make system architecture compacter, and accumulation of heat and exotherm rate fast, thus significantly improve waste heat recovery efficiency, and then raising energy utilization rate, in addition, by arranging expansion chamber in regenerative apparatus, effectively can remove the particle in flue gas, thus effectively avoid the blocking of heat storage, and then guarantee system stable operation.
In addition, reducing and smelting regenerative combustion system according to the above embodiment of the present invention can also have following additional technical characteristic:
In some embodiments of the invention, described reducing and smelting regenerative combustion system comprises further: flue gas recovery device, and described flue gas recovery device exports with described first air off gas respectively, described first coal gas waste gas outlet, described second air off gas export and be connected with the second coal gas waste gas outlet.Thus, effectively environmental pollution can be avoided.
In some embodiments of the invention, described first air port, described first gas port, described second air port and described second gas port ovalize.Thus, the efficiency of combustion of air and coal gas can be significantly improved.
In some embodiments of the invention, in the vertical direction, described first air port is positioned at above described first gas port, and described second air port is positioned at above described second gas port.Thus, the efficiency of combustion of air and coal gas can be improved further.
In some embodiments of the invention, described first air port direction, described first gas port direction, described second air port direction, described second gas port direction are separately 5 ~ 10 degree of angles with horizontal direction.Thus, the efficiency of combustion of air and coal gas can be improved further.
In some embodiments of the invention, described first regenerative apparatus is connected by the first flange with described first perforate, and described two regenerative apparatuses are connected by the second flange with described second perforate.Thus, make the maintenance of system and change convenient.
In some embodiments of the invention, the gap separately fiberfill fibers felt of the gap of described first burner and described first perforate, described second burner and described second perforate.Thus, the loss of heat can effectively be avoided.
In some embodiments of the invention, described first regenerative apparatus and described second regenerative apparatus are symmetrically distributed in the both sides of described body of heater.
In some embodiments of the invention, described reducing and smelting regenerative combustion system comprises further: control device, described control device respectively with described first regenerative apparatus, second regenerative apparatus, first air triple valve, first gas three-way valve, second air triple valve is connected with the second gas three-way valve, and be suitable for according to the first air heat storage in described first regenerative apparatus and described second regenerative apparatus, first coal gas heat storage, the temperature of the second air heat storage and the second coal gas heat storage controls described first air door, first gas valve, opening and closedown of second air door and the second gas valve.
In another aspect of the present invention, the invention discloses and a kind ofly adopt reducing and smelting regenerative combustion system described above to carry out the method for smelting, comprising:
(1) utilize igniter burner to light body of heater and smelt gas in space;
(2) the first air door is opened by control device, first gas valve, close the second air door and the first gas valve, first air port of air successively by the first air heat storage in the first regenerative apparatus and the first expansion chamber and on the first burner is entered and smelts space, first gas port of coal gas successively by the first coal gas heat storage in the first regenerative apparatus and the second expansion chamber and on the first burner enters smelts space, to make coal gas and air burning produce reducing gases, and utilize described reducing gases to reduce to material in described smelting space, to obtain flue gas,
(3) second air port of described flue gas on the second burner and the second gas port are entered respectively successively the 3rd expansion chamber in the second regenerative apparatus and the second air heat storage, the 4th expansion chamber and the second air heat storage, so that the particle removed in described flue gas reclaim the waste heat of described flue gas;
(4) the first air door, the first gas valve is closed by control device, open the second air door and the second gas valve, to utilize the waste heat reclaimed in described second regenerative apparatus to carry out the pre-heat treatment to air and coal gas, obtain the air after preheating and coal gas;
(5) by the air after preheating and coal gas, burning in smelting space produces reducing gases, and utilizes described reducing gases to reduce, to obtain flue gas to material in described smelting space;
(6) first air port of described flue gas on the first burner and the first gas port are entered respectively successively the first expansion chamber in the first regenerative apparatus and the first air heat storage, the second expansion chamber and the first air heat storage, so that the particle removed in described flue gas reclaim the waste heat of described flue gas;
(7) step (2) ~ (6) are repeated.
Smelting process according to the embodiment of the present invention is smelted by using above-mentioned reducing and smelting regenerative combustion system, destruction to body of heater when can effectively avoid changing burner, and coal gas and air are supplied to body of heater from the same side of body of heater, air and coal gas are fully mixed, thus significantly improve efficiency of combustion, and more in the past both sides respectively air supply compare with coal gas, effectively can avoid the selective oxidation of material, make system architecture compacter simultaneously, and accumulation of heat and exotherm rate fast, thus significantly improve waste heat recovery efficiency, and then raising energy utilization rate, in addition, effectively can remove the particle in flue gas, thus effectively avoid the blocking of heat storage, and then guarantee system stable operation.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of reducing and smelting regenerative combustion system according to an embodiment of the invention;
Fig. 2 is the structural representation according to the burner in the reducing and smelting regenerative combustion system of another embodiment of the present invention;
Fig. 3 is the structural representation of the reducing and smelting regenerative combustion system according to another embodiment of the present invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In one aspect of the invention, the present invention proposes a kind of reducing and smelting regenerative combustion system.Reducing and smelting regenerative combustion system below in conjunction with Fig. 1-3 pairs of embodiment of the present invention is described in detail.According to embodiments of the invention, this system comprises:
Body of heater 100: according to embodiments of the invention, body of heater 100 limits smelts space 10, and the sidewall of body of heater 100 has igniter burner 11, first perforate 12, second perforate 13 and material inlet 14.
According to embodiments of the invention, body of heater 100 can be molten point stove.
According to embodiments of the invention, the first perforate 12 and the second perforate 13 can be arranged on any two sides of body of heater 100, and according to a particular embodiment of the invention, the first perforate 12 and the second perforate 13 can be symmetricly set on two sides of body of heater 100.
First burner 200: according to embodiments of the invention, the first burner 200 can be positioned at the first perforate 12, and according to a particular embodiment of the invention, the first burner 200 has the first air port 21 and the first gas port 22.
According to embodiments of the invention, the first air port 21 and the first gas port 22 can ovalizes.
According to embodiments of the invention, in the vertical direction, first air port 21 is positioned at the top (as Fig. 2) of the first gas port 22, and the first air port 21 direction and the first gas port 22 direction are separately 5 ~ 10 degree of angles with horizontal direction.Inventor finds; by the first air port and the first gas port are arranged this angle; the two can be sprayed mutually; the mixed effect that comparatively straight spray and larger spray angle produce is more violent; thus significantly improve efficiency of combustion; and then effectively form reducing atmosphere on the material surface of body of heater; simultaneously the flue gas of reducing atmosphere is pressed close to weld pool surface and is played a protective role to needing the bath material of reducing atmosphere in fusion process, thus effectively avoids the oxidization burning loss to body of heater in smelting process.
According to embodiments of the invention, the gap place of the first perforate 12 and the first burner 200 can fiberfill fibers felt.Thus, scattering and disappearing of heat can effectively be avoided.
Second burner 300: according to embodiments of the invention, the first burner 300 can be positioned at the second perforate 13, and according to a particular embodiment of the invention, the second burner 300 has the second air port 31 and the second gas port 32.
According to embodiments of the invention, the second air port 31 and the second gas port 32 can ovalizes.
According to embodiments of the invention, in the vertical direction, the second air port 31 is positioned at the top of the second gas port 32, and the second air port 31 direction and the second gas port 32 direction are separately 5 ~ 10 degree of angles with horizontal direction.Inventor finds; by the second air port and the second gas port are arranged this angle; the two can be sprayed mutually; the mixed effect that comparatively straight spray and larger spray angle produce is more violent; thus significantly improve efficiency of combustion; and then effectively form reducing atmosphere on the material surface of body of heater; simultaneously the flue gas of reducing atmosphere is pressed close to weld pool surface and is played a protective role to needing the bath material of reducing atmosphere in fusion process, thus effectively avoids the oxidization burning loss to body of heater in smelting process further.
According to embodiments of the invention, the gap place of the second perforate 13 and the second burner 300 can fiberfill fibers felt.Thus, scattering and disappearing of heat can effectively be avoided.
First regenerative apparatus 400: according to embodiments of the invention, the first regenerative apparatus 400 has the first housing 40, according to a particular embodiment of the invention, limits the first accumulation of heat space 41 in the first housing 40.
According to embodiments of the invention, along away from body of heater 100 direction, there is left expansion chamber (not shown) and left heat storage (not shown) successively in first accumulation of heat space 41, wherein left expansion chamber comprises the first expansion chamber 43 and the second expansion chamber 45, and left heat storage comprises the first air heat storage 42 and the first coal gas heat storage 44.
According to embodiments of the invention, the first air heat storage 42 is connected with the first expansion chamber 43 and is connected with smelting space 10 by the first air port 21, and is suitable for supplying air in smelting space or carries out waste heat recovery after flue gas is carried out sedimentation.
According to embodiments of the invention, the first regenerative apparatus 400 can be connected by the first flange (not shown) with the first perforate 12.Thus, make system maintenance and change convenient.
According to embodiments of the invention, limit the first high temperature section 46 and the first low-temperature zone 47 in the first air heat storage 42, according to a particular embodiment of the invention, the first high temperature section 46 is near the first expansion chamber 43.
According to embodiments of the invention, the top of the first high temperature section 46 can be filled with ceramic bead, and middle and lower part and first low-temperature zone 47 of the first high temperature section 46 can be filled with ceramic honey comb.It is to be understood that " top of the first high temperature section " can be understood as the inner position near top of the first high temperature section, " middle and lower part of the first high temperature section " can be understood as the inner space except top of the first high temperature section.Inventor finds, by adopting ceramic bead in the first high temperature section top, and in the middle and lower part of the first high temperature section and the first low-temperature zone, adopt ceramic honey comb, not only effectively can avoid the blocking of high temperature section, and can significantly improve heat transfer efficiency, and in same volume situation, the efficiency of identical heat transfer time to the heat recovery of flue gas is higher.
According to embodiments of the invention, the first coal gas heat storage 44 is connected with the second expansion chamber 45 and is connected with smelting space 10 by the first gas port 22, and is suitable for coal gas to be supplied in smelting space or carries out waste heat recovery after flue gas is carried out sedimentation.
According to embodiments of the invention, limit the second high temperature section 48 and the second low-temperature zone 49 in the first coal gas heat storage 44, according to a particular embodiment of the invention, the second high temperature section 48 is near the second expansion chamber 45.
According to embodiments of the invention, the top of the second high temperature section 48 can be filled with ceramic bead, and middle and lower part and second low-temperature zone 49 of the second high temperature section 48 can be filled with ceramic honey comb.It is to be understood that " top of the second high temperature section " can be understood as the inner position near top of the second high temperature section, " middle and lower part of the second high temperature section " can be understood as the inner space except top of the second high temperature section.Inventor finds, by adopting ceramic bead in the second high temperature section top, and in the middle and lower part of the second high temperature section and the second low-temperature zone, adopt ceramic honey comb, not only effectively can avoid the blocking of high temperature section, and the organic efficiency of flue gas heat can be improved further.
According to embodiments of the invention, first housing 40 can be provided with the first air intake 401 and the first gas entry 402, according to a particular embodiment of the invention, the first air intake 401 is connected with the first air heat storage 42, and the first gas entry 402 is connected with the first coal gas heat storage 44.
According to embodiments of the invention, the first expansion chamber and the second expansion chamber can adopt cyclone separator to carry out dedusting to the flue gas containing dust housing.
Inventor finds, can effectively avoid flue dust to the blocking of heat storage by adopting the regenerative apparatus with expansion chamber, thus greatly ensured the working condition of heat storage, decrease the Maintenance and Repair cost of heat storage, and then significantly improve the service life of regenerative apparatus, ceramic bead heat storage and honeycomb ceramic heat accumulator are combined simultaneously, the waste heat recovery efficiency of flue gas can be significantly improved, and the heat storage of this combination has higher heat exchange efficiency, thus the waste heat in heat storage can be passed to cold air and cooled coal gas to greatest extent, make through the air of regenerative apparatus and coal gas close to furnace temperature, quick Thorough combustion after mixing with the fuel gas entered in stove, make burner hearth quick heating and fire box temperature field is even, thus raising heating efficiency, shorten heating cycle, and then significantly improve production capacity, and the temperature of the flue gas after heat storage drops to less than 180 DEG C.
Second regenerative apparatus 500: according to embodiments of the invention, the second regenerative apparatus 500 has the second housing 50, according to a particular embodiment of the invention, limits the second accumulation of heat space 51 in the second housing 50.
According to embodiments of the invention, along the direction away from body of heater 100, there is right expansion chamber (not shown) and right heat storage (not shown) successively in second accumulation of heat space 51, right expansion chamber comprises the 3rd expansion chamber 53 and the 4th expansion chamber 55, and right heat storage comprises the second air heat storage 52 and the second coal gas heat storage 54.
According to embodiments of the invention, the second air heat storage 52 is connected with the 3rd expansion chamber 53 and is connected with smelting space 10 by the second air port 31, and is suitable for supplying air in smelting space or carries out waste heat recovery after flue gas is carried out sedimentation.
According to embodiments of the invention, the second regenerative apparatus 500 can be connected by the second flange (not shown) with the second perforate 13.Thus, make system maintenance and change convenient.
According to embodiments of the invention, limit third high temperature section 56 and the 3rd low-temperature zone 57 in the second air heat storage 52, according to a particular embodiment of the invention, third high temperature section 56 is near the 3rd expansion chamber 53.
According to embodiments of the invention, the top of third high temperature section 56 can be filled with ceramic bead, and middle and lower part and the 3rd low-temperature zone 57 of third high temperature section 56 can be filled with ceramic honey comb.It is to be understood that " top of third high temperature section " can be understood as third high temperature intersegmental part near the position at top, " middle and lower part of third high temperature section " can be understood as the space of third high temperature intersegmental part except top.Inventor finds, by adopting ceramic bead in third high temperature section top, and in the middle and lower part of third high temperature section and the 3rd low-temperature zone, adopt ceramic honey comb, not only effectively can avoid the blocking of high temperature section, and the organic efficiency of flue gas heat can be improved further.
According to embodiments of the invention, the second coal gas heat storage 54 is connected with the 4th expansion chamber 55 and is connected with smelting space 10 by the second gas port 32, and is suitable for coal gas to be supplied in smelting space or carries out waste heat recovery after flue gas is carried out sedimentation.
According to embodiments of the invention, limit the 4th high temperature section 58 and the 4th low-temperature zone 59 in the second coal gas heat storage 54, according to a particular embodiment of the invention, the 4th high temperature section 58 is near the 4th expansion chamber 55.
According to embodiments of the invention, the top of the 4th high temperature section 58 can be filled with ceramic bead, and middle and lower part and the 4th low-temperature zone 59 of the 4th high temperature section 58 can be filled with ceramic honey comb.It is to be understood that " top of the 4th high temperature section " can be understood as the inner position near top of the 4th high temperature section, " middle and lower part of the 4th high temperature section " can be understood as the inner space except top of the 4th high temperature section.Inventor finds, by adopting ceramic bead in the 4th high temperature section top, and in the middle and lower part of the 4th high temperature section and the 4th low-temperature zone, adopt ceramic honey comb, not only effectively can avoid the blocking of high temperature section, and the organic efficiency of flue gas heat can be improved further
According to embodiments of the invention, second housing 50 can be provided with the second air intake 501 and the second gas entry 502, according to a particular embodiment of the invention, the second air intake 501 is connected with the second air heat storage 52, and the second gas entry 502 is connected with the second coal gas heat storage 54.
According to embodiments of the invention, the 3rd expansion chamber and the 4th expansion chamber can adopt cyclone separator to carry out dedusting to the flue gas containing dust housing.
According to embodiments of the invention, the first regenerative apparatus 400 and the second regenerative apparatus 500 can be symmetrically distributed in the both sides of body of heater 100.
First air triple valve 600: according to embodiments of the invention, first air triple valve 600 has the first air door 601, first air exchange valve 602, first air intlet 603, first air off gas outlet 604 and the first air outlet slit 605, according to a particular embodiment of the invention, the first air outlet slit 605 is connected with the first air intake 401.
First gas three-way valve 700: according to embodiments of the invention, first gas three-way valve 700 has the first gas valve 701, first coal gas scavenging air valve 702, first gas inlet 703, first coal gas waste gas outlet 704 and the first gas exit 705, according to a particular embodiment of the invention, the first gas exit 705 is connected with the first gas entry 402.
Second air triple valve 800: according to embodiments of the invention, second air triple valve 800 has the second air door 801, second air exchange valve 802, second air intlet 803, second air off gas outlet 804 and the second air outlet slit 805, according to a particular embodiment of the invention, the second air outlet slit 805 is connected with the second air intake 501.
Second gas three-way valve 900: according to embodiments of the invention, second gas three-way valve 900 has the second gas valve 901, second coal gas scavenging air valve 902, second gas inlet 903, second coal gas waste gas outlet 904 and the second gas exit 905, according to a particular embodiment of the invention, the second gas exit 905 is connected with the second gas entry 502.
Concrete, when the second regenerative apparatus carries out accumulation of heat, open the first air door and the first gas valve, close the second air door and the second gas valve, air enters the first air triple valve by the first air intlet, first air exchange valve cuts out the first air off gas outlet, air is made to enter in the first regenerative apparatus through the first air outlet slit, and enter smelting space through the first air port, coal gas enters the first gas three-way valve by the first gas entry simultaneously, first coal gas scavenging air valve closes the first coal gas waste gas outlet, coal gas is made to enter in the first regenerative apparatus through the first gas exit, and enter smelting space through the first gas port, then the flue gas smelting space generation enters the second regenerative apparatus through the second air port and the second gas port, fume afterheat is absorbed by the heat storage in the second regenerative apparatus, then flue gas enters the second air triple valve and the second gas three-way valve through the second air intake and the second gas entry respectively, the second air shut-off valve in second air triple valve closes the second air intlet, the second control valve for coal gas in second gas three-way valve closes the second gas inlet, flue gas is discharged through the second air off gas outlet and the second coal gas waste gas outlet, and when the second regenerative apparatus accumulation of heat is complete, close the first air door and the first gas valve, open the second air door and the second gas valve, air is made to enter the second air triple valve through the second air intlet, second air exchange valve cuts out the second air off gas outlet, air is made to enter the second regenerative apparatus through the second air intake, air is made fully to absorb waste heat in the second regenerative apparatus, and the air of preheating is entered smelting space through the second air port, coal gas enters the second gas three-way valve by the second gas entry simultaneously, second coal gas scavenging air valve closes the second coal gas waste gas outlet, coal gas is made to enter in the second regenerative apparatus through the second gas exit, coal gas is made fully to absorb waste heat in the second regenerative apparatus, and the coal gas of preheating is entered smelting space through the second gas port, then the flue gas smelting space generation enters the first regenerative apparatus through the first air port and the first gas port, fume afterheat is absorbed by the heat storage in the first regenerative apparatus, then flue gas enters the first air triple valve and the first gas three-way valve through the first air intake and the first gas entry respectively, the first air shut-off valve in first air triple valve closes the first air intlet, the first control valve for coal gas in first gas three-way valve closes the first gas inlet, flue gas is discharged through the firstth air off gas outlet and the first coal gas waste gas outlet, above operation is repeated after treating the first regenerative apparatus accumulation of heat.
According to the reducing and smelting regenerative combustion system of the embodiment of the present invention by using independently burner, the system that one casting is more in the past formed is compared, destruction to body of heater when can effectively avoid changing burner, and coal gas and air are supplied to body of heater from the same side of body of heater, air and coal gas are fully mixed, thus significantly improve efficiency of combustion, and more in the past both sides respectively air supply compare with coal gas, effectively can avoid the selective oxidation of material, in regenerative apparatus, adopt ceramic bead heat storage and honeycomb ceramic heat accumulator to combine simultaneously carry out accumulation of heat, make system architecture compacter, and accumulation of heat and exotherm rate fast, thus significantly improve waste heat recovery efficiency, and then raising energy utilization rate, in addition, by arranging expansion chamber in regenerative apparatus, effectively can remove the particle in flue gas, thus effectively avoid the blocking of heat storage, and then guarantee system stable operation.
With reference to figure 3, the reducing and smelting regenerative combustion system of the embodiment of the present invention comprises further:
Flue gas recovery device 1000: according to embodiments of the invention, flue gas recovery device 1000 exports the 604, first coal gas waste gas outlet 704, second air off gas respectively and exports 804 and be connected with the second coal gas waste gas outlet 904 with the first air off gas, and is suitable for processing the flue gas after waste heat recovery.
Control device 1100: according to embodiments of the invention, control device 1100 respectively with the first regenerative apparatus 400, second regenerative apparatus 500, first air triple valve 600, first gas three-way valve 700, second air triple valve 800 is connected with the second gas three-way valve 900, and be suitable for according to the first air heat storage in the first regenerative apparatus and the second regenerative apparatus, first coal gas heat storage, the temperature of the second air heat storage and the second coal gas heat storage controls the first air door, first gas valve, opening and closedown of second air door and the second gas valve, thus make the first regenerative apparatus and the second regenerative apparatus periodically carry out accumulation of heat and heat release.
In another aspect of the present invention, the present invention proposes and a kind ofly adopt above-mentioned reducing and smelting regenerative combustion system to carry out the method for smelting.According to embodiments of the invention, the method comprises:
(1) utilize igniter burner to light body of heater and smelt gas in space;
(2) the first air door is opened by control device, first gas valve, close the second air door and the first gas valve, first air port of air successively by the first air heat storage in the first regenerative apparatus and the first expansion chamber and on the first burner is entered and smelts space, first gas port of coal gas successively by the first coal gas heat storage in the first regenerative apparatus and the second expansion chamber and on the first burner enters smelts space, to make coal gas and air burning produce reducing gases, and utilize reducing gases to reduce to material in smelting space, to obtain flue gas,
(3) second air port of flue gas on the second burner and the second gas port are entered respectively successively the 3rd expansion chamber in the second regenerative apparatus and the second air heat storage, the 4th expansion chamber and the second air heat storage, so that the particle removed in flue gas the waste heat of recovered flue gas;
(4) the first air door, the first gas valve is closed by control device, open the second air door and the second gas valve, to utilize the waste heat reclaimed in the second regenerative apparatus to carry out the pre-heat treatment to air and coal gas, obtain the air after preheating and coal gas;
(5) by the air after preheating and coal gas, burning in smelting space produces reducing gases, and utilizes reducing gases to reduce, to obtain flue gas to material in smelting space;
(6) first air port of flue gas on the first burner and the first gas port are entered respectively successively the first expansion chamber in the first regenerative apparatus and the first air heat storage, the second expansion chamber and the first air heat storage, so that the particle removed in flue gas the waste heat of recovered flue gas;
(7) step (2) ~ (6) are repeated.
Smelting process according to the embodiment of the present invention is smelted by using above-mentioned reducing and smelting regenerative combustion system, destruction to body of heater when can effectively avoid changing burner, and coal gas and air are supplied to body of heater from the same side of body of heater, air and coal gas are fully mixed, thus significantly improve efficiency of combustion, and more in the past both sides respectively air supply compare with coal gas, effectively can avoid the selective oxidation of material, make system architecture compacter simultaneously, and accumulation of heat and exotherm rate fast, thus significantly improve waste heat recovery efficiency, and then raising energy utilization rate, in addition, effectively can remove the particle in flue gas, thus effectively avoid the blocking of heat storage, and then guarantee system stable operation.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. a reducing and smelting regenerative combustion system, is characterized in that, comprising:
Body of heater, described body of heater limits smelts space, the sidewall of described body of heater has igniter burner, the first perforate, the second perforate and material inlet;
First burner, described first burner is positioned at described first perforate, and described first burner has the first air port and the first gas port;
Second burner, described second burner is positioned at described second perforate, and described second burner has the second air port and the second gas port;
First regenerative apparatus, described first regenerative apparatus comprises:
First housing, the first heat accumulation space is limited in described first housing, along away from described body of heater direction, there is left expansion chamber and left heat storage successively in described first heat accumulation space, described left expansion chamber comprises the first expansion chamber and the second expansion chamber, described left heat storage comprises the first air heat storage and the first coal gas heat storage, described first air heat storage is connected with described first expansion chamber and is connected with described smelting space by described first air port, described first coal gas heat storage is connected with described second expansion chamber and is connected with described smelting space by described first gas port,
First air intake, described first air intake is formed on described first housing, and described first air intake is connected with described first air heat storage;
First gas entry, described first gas entry is formed on described first housing, and described first gas entry is connected with described first coal gas heat storage;
Second regenerative apparatus, described second regenerative apparatus comprises:
Second housing, the second heat accumulation space is limited in described second housing, along away from described body of heater direction, there is right expansion chamber and right heat storage successively in described second heat accumulation space, described right expansion chamber comprises the 3rd expansion chamber and the 4th expansion chamber, described right heat storage comprises the second air heat storage and the second coal gas heat storage, described second air heat storage is connected with described 3rd expansion chamber and is connected with described smelting space by described second air port, described second coal gas heat storage is connected with described 4th expansion chamber and is connected with described smelting space by described second gas port,
Second air intake, described second air intake is formed on described second housing, and described second air intake is connected with described second air heat storage;
Second gas entry, described second gas entry is formed on described second housing, and described second gas entry is connected with described second coal gas heat storage;
First air triple valve, described first air triple valve has the first air door, the first air exchange valve, the first air intlet, the first air off gas outlet and the first air outlet slit, and described first air outlet slit is connected with described first air intake;
First gas three-way valve, described first gas three-way valve has the first gas valve, the first coal gas scavenging air valve, the first gas inlet, the first coal gas waste gas outlet and the first gas exit, and described first gas exit is connected with described first gas entry;
Second air triple valve, described second air triple valve has the second air door, the second air exchange valve, the second air intlet, the second air off gas outlet and the second air outlet slit, and described second air outlet slit is connected with described second air intake; And
Second gas three-way valve, described second gas three-way valve has the second gas valve, the second coal gas scavenging air valve, the second gas inlet, the second coal gas waste gas outlet and the second gas exit, and described second gas exit is connected with described second gas entry,
Wherein,
The first high temperature section and the first low-temperature zone is limited in described first air heat storage, described first high temperature section is near described first expansion chamber, the second high temperature section and the second low-temperature zone is limited in described first coal gas heat storage, described second high temperature section is near described second expansion chamber, the top of described first high temperature section and described second high temperature section is filled with ceramic bead, the middle and lower part of described first high temperature section, the middle and lower part of described second high temperature section, described first low-temperature zone, described second low-temperature zone are filled with ceramic honey comb
Third high temperature section and the 3rd low-temperature zone is limited in described second air heat storage, described third high temperature section is near described 3rd expansion chamber, the 4th high temperature section and the 4th low-temperature zone is limited in described second coal gas heat storage, described 4th high temperature section is near described 4th expansion chamber, the top of described three high temperature section and described 4th high temperature section is filled with ceramic bead, and the middle and lower part of described third high temperature section, the middle and lower part of described 4th high temperature section, described 3rd low-temperature zone, described 4th low-temperature zone are filled with ceramic honey comb.
2. reducing and smelting regenerative combustion system according to claim 1, is characterized in that, comprise further:
Flue gas recovery device, described flue gas recovery device exports with described first air off gas respectively, described first coal gas waste gas outlet, described second air off gas export and be connected with the second coal gas waste gas outlet.
3. reducing and smelting regenerative combustion system according to claim 1, is characterized in that, described first air port, described first gas port, described second air port and described second gas port ovalize.
4. reducing and smelting regenerative combustion system according to claim 3, is characterized in that, in the vertical direction, and described first air port is positioned at above described first gas port, and described second air port is positioned at above described second gas port.
5. reducing and smelting regenerative combustion system according to claim 3, it is characterized in that, described first air port direction, described first gas port direction, described second air port direction, described second gas port direction are separately 5 ~ 10 degree of angles with horizontal direction.
6. reducing and smelting regenerative combustion system according to claim 1, is characterized in that, described first regenerative apparatus is connected by the first flange with described first perforate, and described two regenerative apparatuses are connected by the second flange with described second perforate.
7. reducing and smelting regenerative combustion system according to claim 1, is characterized in that, the gap separately fiberfill fibers felt of the gap of described first burner and described first perforate, described second burner and described second perforate.
8. reducing and smelting regenerative combustion system according to claim 1, is characterized in that, described first regenerative apparatus and described second regenerative apparatus are symmetrically distributed in the both sides of described body of heater.
9. reducing and smelting regenerative combustion system according to claim 1, is characterized in that, comprise further:
Control device, described control device is connected with the second gas three-way valve with described first regenerative apparatus, the second regenerative apparatus, the first air triple valve, the first gas three-way valve, the second air triple valve respectively, and is suitable for controlling opening and closedown of described first air door, the first gas valve, the second air door and the second gas valve according to the temperature of the first air heat storage, the first coal gas heat storage, the second air heat storage and the second coal gas heat storage in described first regenerative apparatus and described second regenerative apparatus.
10. adopt the reducing and smelting regenerative combustion system described in any one of claim 1 ~ 9 to carry out a method of smelting, it is characterized in that, comprising:
(1) utilize igniter burner to light body of heater and smelt gas in space;
(2) the first air door is opened by control device, first gas valve, close the second air door and the first gas valve, first air port of air successively by the first air heat storage in the first regenerative apparatus and the first expansion chamber and on the first burner is entered and smelts space, first gas port of coal gas successively by the first coal gas heat storage in the first regenerative apparatus and the second expansion chamber and on the first burner enters smelts space, to make coal gas and air burning produce reducing gases, and utilize described reducing gases to reduce to material in described smelting space, to obtain flue gas,
(3) second air port of described flue gas on the second burner and the second gas port are entered respectively successively the 3rd expansion chamber in the second regenerative apparatus and the second air heat storage, the 4th expansion chamber and the second air heat storage, so that the particle removed in described flue gas reclaim the waste heat of described flue gas;
(4) the first air door, the first gas valve is closed by control device, open the second air door and the second gas valve, to utilize the waste heat reclaimed in described second regenerative apparatus to carry out the pre-heat treatment to air and coal gas, obtain the air after preheating and coal gas;
(5) by the air after preheating and coal gas, burning in smelting space produces reducing gases, and utilizes described reducing gases to reduce, to obtain flue gas to material in described smelting space;
(6) first air port of described flue gas on the first burner and the first gas port are entered respectively successively the first expansion chamber in the first regenerative apparatus and the first air heat storage, the second expansion chamber and the first air heat storage, so that the particle removed in described flue gas reclaim the waste heat of described flue gas;
(7) step (2) ~ (6) are repeated.
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