CN111336530A - System and method for recovering raw gas energy of ore furnace - Google Patents
System and method for recovering raw gas energy of ore furnace Download PDFInfo
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- CN111336530A CN111336530A CN202010170857.3A CN202010170857A CN111336530A CN 111336530 A CN111336530 A CN 111336530A CN 202010170857 A CN202010170857 A CN 202010170857A CN 111336530 A CN111336530 A CN 111336530A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 114
- 239000000428 dust Substances 0.000 claims abstract description 45
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000003546 flue gas Substances 0.000 claims abstract description 42
- 238000002485 combustion reaction Methods 0.000 claims abstract description 37
- 239000000571 coke Substances 0.000 claims abstract description 30
- 238000011084 recovery Methods 0.000 claims abstract description 29
- 239000002918 waste heat Substances 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 6
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 4
- 239000003607 modifier Substances 0.000 claims description 24
- 238000002156 mixing Methods 0.000 claims description 19
- 239000000126 substance Substances 0.000 claims description 17
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical group [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 238000007254 oxidation reaction Methods 0.000 claims description 9
- 239000000779 smoke Substances 0.000 claims description 8
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910003439 heavy metal oxide Inorganic materials 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 claims description 5
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 239000011701 zinc Substances 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- -1 ferrous metal oxides Chemical class 0.000 claims description 2
- 239000002737 fuel gas Substances 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 abstract description 4
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 238000000746 purification Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000024121 nodulation Effects 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J7/00—Arrangement of devices for supplying chemicals to fire
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/002—Gaseous fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
- F23G2206/203—Waste heat recuperation using the heat in association with another installation with a power/heat generating installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/10—Intercepting solids by filters
- F23J2217/101—Baghouse type
-
- 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
- Y02E20/12—Heat utilisation in combustion or incineration of waste
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Environmental & Geological Engineering (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a system and a method for recovering raw gas energy of a submerged arc furnace output from the submerged arc furnace, in particular to the system and the method for recovering the raw gas energy of the submerged arc furnace by taking the submerged arc furnace gas as fuel gas for power generation or steam generation, wherein the system for recovering the raw gas energy of the submerged arc furnace is arranged in a processing system for outputting the raw gas by the submerged arc furnace, and comprises a channel for conveying the raw gas and cooling the raw gas, and the output ends of the channel are sequentially connected with: the combustion device is used for introducing air to combust with the raw coke oven gas to obtain metal oxide and high-temperature flue gas; the waste heat boiler is used for receiving high-temperature flue gas; and the dust removal device is used for receiving the flue gas output from the waste heat boiler. Through adopting this hot stove raw coke oven gas energy recovery system in ore deposit, compare in traditional adoption earlier the multistage back that removes dust, carry out recycle's mode again, change into the earlier mode that removes dust and discharge of utilizing of this system, this system operation control is simpler, convenient.
Description
Technical Field
The invention relates to a system and a method for recovering submerged arc furnace raw gas energy output from a submerged arc furnace, in particular to a system and a method for recovering the submerged arc furnace raw gas energy by using the submerged arc furnace gas as fuel gas for power generation or steam generation.
Background
The raw gas of the existing closed ore-smelting furnace is cooled by a flue and then sent into a mechanical dust collector for preliminary dust removal and further temperature reduction, then sent into a bag-type dust collector by a raw gas fan for dust removal and purification, and the purified gas after dust removal and purification is sent into the next process for utilization under the conveying of a purified gas fan, and can be used as a clean fuel and a chemical raw material. Therefore, the sealed submerged arc furnace raw gas is subjected to multi-stage dust removal and then is recycled, so that the subsequent maintenance and cleaning are troublesome, and the loss of the dust remover is large.
Disclosure of Invention
The invention aims to provide a raw gas energy recovery system of a submerged arc furnace, which is simple, convenient and reliable to operate and control.
In order to realize the above-mentioned purpose, the technical scheme that this application adopted is hot stove raw coke oven gas energy recovery system in the ore deposit, dispose in the processing system of hot stove output raw coke oven gas in the ore deposit, including carrying the passageway of raw coke oven gas and cooling this raw coke oven gas, the output of passageway connects gradually:
the combustion device is used for receiving the raw gas in the channel and introducing air to combust with the raw gas to obtain metal oxide and high-temperature flue gas;
the waste heat boiler is used for receiving high-temperature flue gas from the combustion device;
and the dust removal device is used for receiving the flue gas which is output from the waste heat boiler and subjected to heat exchange.
Like this through setting up burner, exhaust-heat boiler and the dust collector of establishing ties in proper order and introducing the air with burner and burn earlier raw coke oven gas, change into the high temperature flue gas and carry out heat recycle again, change former multi-stage filtration recycle into the mode of earlier recycle dust removal again, not only reduced the dust removal progression, reduced the loss to the dust remover, provided the life of dust remover.
Further, the combustion device comprises a gas mixing combustion chamber, wherein an air inlet end for receiving external air and a modifier adding end for receiving an added modifier are arranged on the gas mixing combustion chamber; and the smoke discharge end of the gas mixing combustion chamber is communicated with a waste heat boiler.
By adopting the crude gas energy recovery system of the submerged arc furnace, the crude gas is properly cooled, the temperature is reduced and controlled, the temperature of the cooled crude gas is 450-550 ℃, the temperature of the crude gas is below the lower limit temperature of the explosion point of the crude gas, the safety of a post-process system is improved, and then the high-temperature flue gas is generated through a fuel gas mixed combustion chamber with a modifier adding end, so that the high-temperature flue gas is directly used for a waste heat boiler.
An air inlet end and a modifier adding end for receiving the modifier are arranged on the gas mixing combustion chamber, so that the raw coke oven gas can be more fully reacted (oxidation reaction or/and replacement reaction).
Further, the channel for conveying the crude gas and cooling the crude gas is a water-cooling flue for keeping the conveyed crude gas at 450-550 ℃. The water-cooling flue is adopted to cool the raw coke oven gas, and the cooling effect is better.
Furthermore, the outlet end of the waste heat boiler is connected with a dust remover for outputting the filtered flue gas.
Further, the air inlet end is connected with a combustion fan.
Furthermore, a temperature sensor is arranged in a cavity of the combustion device for containing high-temperature flue gas, and the temperature sensor is connected with a control device for controlling a combustion-supporting fan. The temperature sensor is arranged to flexibly adjust the air quantity entering the combustion device besides detecting the temperature.
As another aspect of the invention, the application also provides a method for recovering raw gas energy of the submerged arc furnace, which comprises the following steps:
cooling the high-temperature raw coke oven gas output by the submerged arc furnace to control the temperature of the raw coke oven gas to be 450-550 ℃;
mixing the raw coke oven gas controlled at 450-550 ℃ with air, adding a modifier, and then burning to enable non-ferrous metal simple substances in the raw coke oven gas to be subjected to oxidation reaction, or enabling the non-ferrous metal simple substances in the raw coke oven gas to be subjected to replacement reaction with the modifier to obtain non-ferrous metal oxides, so as to obtain high-temperature flue gas;
conveying the high-temperature flue gas to a waste heat boiler for recycling;
and filtering the flue gas passing through the waste heat boiler and then discharging the filtered flue gas.
The low-melting-point substances such as zinc, aluminum, magnesium and the like contained in the high-temperature raw coke oven gas discharged from the submerged arc furnace mostly exist in a simple substance form, and the low melting point substances often block pipelines, heat exchange equipment, dust removal filter materials and the like, so that the production is seriously influenced. While its oxides have a higher melting point and most of the oxidation is an exothermic reaction, more heat can be recovered. The low-melting-point single substance is converted into the high-melting-point oxide through the oxidation reaction between the gas mixing combustion chamber and air, so that the heat recovery and dust removal flue gas are modified. Thereby avoiding the precipitation of low-melting-point substances during the heat recovery of the waste heat boiler to cause the nodulation of the heat exchange tube and ensuring the reliable filtration of dust removal.
Further, the modifier is a heavy metal oxide.
Further, the heavy metal oxide is iron oxide.
Further, the non-ferrous metal is any one or combination of any more of zinc, aluminum and magnesium.
The invention is further described with reference to the following figures and detailed description. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description. Or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to assist in understanding the invention, and are included to explain the invention and their equivalents and not limit it unduly. In the drawings:
FIG. 1 is a schematic diagram for explaining the raw gas energy recovery system of the submerged arc furnace;
the labels in the figure are: the device comprises a gas mixed combustion chamber 1, an air inlet end 110, a modifier adding end 120, a waste heat boiler 2, a water-cooling flue 3, a dust remover 4, a combustion fan 5, a power fan 6 and a chimney 7.
Detailed Description
The invention will be described more fully hereinafter with reference to the accompanying drawings. Those skilled in the art will be able to implement the invention based on these teachings. Before the present invention is described in detail with reference to the accompanying drawings, it is to be noted that:
the technical solutions and features provided in the present invention in the respective sections including the following description may be combined with each other without conflict.
Moreover, the embodiments of the present invention described in the following description are generally only examples of a part of the present invention, and not all examples. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
With respect to terms and units in the present invention. The term "comprises" and any variations thereof in the description and claims of this invention and the related sections are intended to cover non-exclusive inclusions.
Referring to fig. 1, the system for recovering raw gas energy of a submerged arc furnace is configured in a system for processing raw gas output by the submerged arc furnace, and comprises a channel for conveying raw gas and cooling the raw gas, wherein the conveying outlet end of the channel is connected with a gas mixing combustion chamber 1, and the gas mixing combustion chamber 1 is provided with an air inlet end 110 for receiving external air and a modifier adding end 120 for receiving a modifier; and the smoke discharge end of the gas mixing combustion chamber 1 is communicated with a waste heat boiler 2.
By adopting the crude gas energy recovery system of the submerged arc furnace, the crude gas is properly cooled, the temperature is reduced and controlled, the temperature of the cooled crude gas is 450-550 ℃, the temperature of the crude gas is below the lower limit temperature of the explosion point of the crude gas, so that the safety of a post-process system is improved, and then the high-temperature flue gas is generated through the 120-end gas mixing combustion chamber 1 with the modifier adding end, so that the high-temperature flue gas is directly used for the waste heat boiler 2.
Through setting up this hot stove raw coke oven energy recovery system like this, compare in traditional adoption after multistage dust removal earlier, carry out recycle's mode, change into the mode that this system's earlier utilized the back dust removal and discharge, this system operation control is simpler, and is convenient, also because adopt earlier cooling (this cooling is gone on in order to improve raw coke oven gas utilization ratio, compare traditional first cooling and be in order to ensure the safety of follow-up dust remover, the cooling of this system does not worry the dust remover temperature suitability problem afterwards, this greatly reduced the operation degree of difficulty, the reliability is improved, the security), reuse, the mode of dust removal again at last, whether the temperature is suitable for before also not worrying in subsequent setting up the sack dust removal, the security and the reliability of hot stove raw coke oven gas recovery have been improved.
The channel for conveying the crude gas and cooling the crude gas is a water-cooling flue 3 which keeps the conveyed crude gas at 450-550 ℃. The water-cooling flue 3 is adopted to cool the raw coke oven gas, and the cooling effect is better.
And the outlet end of the waste heat boiler 2 is connected with a dust remover 4 for outputting the filtered flue gas. The air inlet end 110 is connected with a combustion fan 5. The dust collector 4 can be a bag type dust collector, and the bag type dust collector can be a textile bag type dust collector or a high-temperature-resistant metal bag type dust collector.
The specific process can be that high-temperature raw gas from the closed submerged arc furnace is properly cooled by a water-cooling flue 3 and then enters a gas mixed combustion chamber 1 together with air fed by a combustion fan 5 for direct combustion, the combusted gas becomes high-temperature flue gas, and the high-temperature flue gas enters a waste heat boiler 2 to convert gas energy into heat of the waste heat boiler 2 for power generation, steam generation and the like. The flue gas after energy recovery and temperature reduction enters a dust remover 4 for dust purification, and the flue gas after dust removal is sent into a chimney 7 by a power fan 6 to be discharged after reaching the standard.
Therefore, high energy recovery utilization rate is obtained through direct combustion of the high-temperature raw gas. The dust removal and purification of the raw coke oven gas and the energy recycling are integrally completed. The method is particularly suitable for enterprises which use the coal gas of the ore-smelting furnace as fuel gas for power generation or steam generation, and simplifies the whole coal gas utilization process.
By arranging the submerged arc furnace raw gas energy recovery system, a submerged arc furnace raw gas energy recovery method is adopted, and the submerged arc furnace raw gas energy recovery method comprises the following steps:
cooling the high-temperature raw coke oven gas output by the submerged arc furnace to control the temperature of the raw coke oven gas to be 450-550 ℃; the temperature control is performed here by means of a water-cooled flue 3. Preferably, it can be controlled at 450-.
Mixing the raw coke oven gas controlled at 450-550 ℃ with air, adding a modifier, and then burning to enable non-ferrous metal simple substances in the raw coke oven gas to be subjected to oxidation reaction or to be subjected to replacement reaction with the modifier to obtain metal oxide, thereby obtaining high-temperature flue gas; the modifier is heavy metal oxide, preferably ferric oxide; the iron oxide is adopted, so that the price is low and the iron oxide is easy to obtain.
Conveying the high-temperature flue gas to the waste heat boiler 2 for recycling; the high-temperature flue gas releases heat, the high-temperature flue gas firstly enters a hearth of the waste heat boiler 2, then enters a waste heat recovery device of the front smoke box, then enters the smoke and fire tube, and finally enters a waste heat recovery device in a flue of the rear smoke box, and the high-temperature flue gas becomes low-temperature flue gas.
And filtering the flue gas passing through the waste heat boiler 2 and then discharging the filtered flue gas. The bag-type dust collector 4 can be adopted for filtration. The filtered flue gas is transported to a chimney 7 by a power fan 6 and then discharged.
The low-melting-point substances such as zinc, aluminum, magnesium and the like contained in the high-temperature raw coke oven gas discharged from the submerged arc furnace mostly exist in a simple substance form, and the low melting point substances often block pipelines, heat exchange equipment, dust removal filter materials and the like, so that the production is seriously influenced. While its oxides have a higher melting point and most of the oxidation is an exothermic reaction, more heat can be recovered.
The low-melting-point single substance is converted into the high-melting-point oxide through the oxidation reaction between the gas mixing combustion chamber 1 and air, so that the heat recovery and the dedusting smoke are modified.
According to the system requirement, the gas mixing combustion chamber 1 with the modifier adding end 120 is adopted, the modifier can be added into the gas mixing combustion chamber 1, and the modifier and zinc, aluminum, magnesium and the like with higher metal activity in the raw gas generate replacement reaction to be converted into oxides with high melting point, so that the content of low melting point substances is further reduced, and the smoke is modified in an intensified manner. The modifier used herein may be iron oxide.
The low-melting-point single substance is converted into the high-melting-point oxide through the oxidation reaction between the gas mixing combustion chamber and air, so that the heat recovery and dust removal flue gas are modified. Therefore, the problem that the heat exchange tube is nodulated due to precipitation of low-melting-point substances during heat recovery of the waste heat boiler is avoided, dust can be reliably filtered, the loss of the dust remover is reduced, and the service life of the dust remover is prolonged.
The contents of the present invention have been explained above. Those skilled in the art will be able to implement the invention based on these teachings. All other embodiments, which can be derived by a person skilled in the art from the above description without inventive step, shall fall within the scope of protection of the present invention.
Claims (10)
1. The submerged arc furnace raw gas energy recovery system is configured in a treatment system for outputting raw gas by a submerged arc furnace, and comprises a channel for conveying the raw gas and cooling the raw gas, and is characterized in that the output ends of the channel are sequentially connected in series:
the combustion device is used for receiving the raw gas in the channel and introducing air to combust with the raw gas to obtain metal oxide and high-temperature flue gas;
the waste heat boiler is used for receiving high-temperature flue gas from the combustion device;
and the dust removal device is used for receiving the flue gas which is output from the waste heat boiler and subjected to heat exchange.
2. The submerged arc furnace raw gas energy recovery system as recited in claim 1, wherein the combustion device comprises a gas mixing combustion chamber, an air inlet end for receiving external air and a modifier adding end for receiving a modifier are arranged on the gas mixing combustion chamber; and the smoke discharge end of the gas mixing combustion chamber is communicated with a waste heat boiler.
3. The submerged arc furnace raw gas energy recovery system as recited in claim 1, wherein the channel for transporting raw gas and cooling the raw gas is a water-cooled flue for maintaining the transported raw gas at 450-550 ℃.
4. The submerged arc furnace raw gas energy recovery system as recited in claim 1, wherein an outlet end of the exhaust-heat boiler is connected with a dust collector for outputting the filtered flue gas.
5. The submerged arc furnace raw gas energy recovery system as recited in claim 1, wherein a combustion fan is connected to the air inlet end.
6. The submerged arc furnace raw gas energy recovery system according to claim 5, wherein a temperature sensor is arranged in the cavity of the combustion device for containing the high temperature flue gas, and the temperature sensor is connected with a control device for controlling a combustion fan.
7. The method for recovering raw gas energy of the submerged arc furnace is characterized by comprising the following steps of:
cooling the high-temperature raw coke oven gas output by the submerged arc furnace to control the temperature of the raw coke oven gas to be 450-550 ℃;
mixing the raw coke oven gas controlled at 450-550 ℃ with air, adding a modifier, and then burning to enable non-ferrous metal simple substances in the raw coke oven gas to be subjected to oxidation reaction, or enabling the non-ferrous metal simple substances in the raw coke oven gas to be subjected to replacement reaction with the modifier to obtain non-ferrous metal oxides, so as to obtain high-temperature flue gas;
conveying the high-temperature flue gas to a waste heat boiler for recycling;
and filtering the flue gas passing through the waste heat boiler and then discharging the filtered flue gas.
8. The submerged arc furnace raw gas energy recovery method according to claim 7, characterized in that the modifier is a heavy metal oxide.
9. The submerged arc furnace raw gas energy recovery method according to claim 8, characterized in that the heavy metal oxide is iron oxide.
10. The submerged arc furnace raw gas energy recovery method according to claim 7, characterized in that the non-ferrous metal is any one or a combination of any more of zinc, aluminum and magnesium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010170857.3A CN111336530A (en) | 2020-03-12 | 2020-03-12 | System and method for recovering raw gas energy of ore furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010170857.3A CN111336530A (en) | 2020-03-12 | 2020-03-12 | System and method for recovering raw gas energy of ore furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013406A (en) * | 2020-08-20 | 2020-12-01 | 高建勋 | Safe and efficient combustion system for flue gas of submerged arc furnace |
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