CN202993867U - Recovery system of flue gas waste heat of ferro-nickel smelting furnace - Google Patents
Recovery system of flue gas waste heat of ferro-nickel smelting furnace Download PDFInfo
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- CN202993867U CN202993867U CN2012206261139U CN201220626113U CN202993867U CN 202993867 U CN202993867 U CN 202993867U CN 2012206261139 U CN2012206261139 U CN 2012206261139U CN 201220626113 U CN201220626113 U CN 201220626113U CN 202993867 U CN202993867 U CN 202993867U
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- 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
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- 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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
A recovery system of flue gas waste heat of a ferro-nickel smelting furnace comprises a settling chamber, a dust collector, a waste heat boiler, a gas-distributing cylinder and a middle fan, wherein the settling chamber is connected with the waste heat boiler through an air inlet pipe of a boiler; a flue gas outlet of the waste heat boiler is connected with the middle fan; a flue gas outlet of the middle fan is connected with a flue gas inlet of the dust collector; the waste heat boiler comprises a economizer, an evaporator, a superheater and a drum; the economizer, the evaporator and the superheater are arranged inside the waste heat boiler; boiler feed water enters into an inlet of the economizer; an outlet of the economizer is connected with a saturated water inlet of the drum; a saturated water outlet of the drum is connected with an inlet of the evaporator; a saturated steam inlet of the drum is connected with an outlet of the evaporator; a saturated steam outlet of the drum is connected with an inlet of the superheater; and an outlet of the superheater is connected with the gas-distributing cylinder. The recovery system of the flue gas waste heat of the ferro-nickel smelting furnace has the advantages of avoiding outward sparkling flames caused by lacking of system negative pressures and fully and effectively recycling the waste heat of the flue gas.
Description
Technical field
The utility model relates to a kind of flue gas waste heat recovery system, particularly relates to a kind of nickel-iron smelting furnace flue gas exhaust heat recovery system that adopts rotary kiln-eaf process.
Background technology
The method take nickel-bearing laterite as the raw material smelting ferronickel of prior art mainly contains two kinds of hydrometallurgy and pyrometallurgical smeltings.Adopt the nickel-iron smelting of rotary kiln-eaf process to belong to pyrometallurgical smelting.At present, China's laterite ore refinery adopts this kind rotary kiln-eaf process smelting ferronickel more.Adopt the nickel-iron smelting flow process of rotary kiln-eaf process mainly to be divided into following operation: dry kiln is dry, rotary kiln baking prereduction, electro-smelting, ladle refining etc.Be also that in nickel-iron smelting stove melting operation, the high-temperature flue gas of generation contains the CO of 70% left and right at electro-smelting, this high-temperature flue gas or delivering to rotary kiln participates in the roasting prereduction process, or directly emptying.The shortcoming of this flue gas processing mode is obvious: deliver to rotary kiln and participate in the roasting prereduction process, not only cause fume afterheat well not utilized because smoke pipe can not be incubated, and the problems such as the air-introduced machine load is excessive, operating mode is bad, the not enough generation of system's negative pressure flame emits phenomenon outward, smoke pipe coking situation is serious occur; Directly emptying is not only wasted fume afterheat but also polluted environment especially.Along with society constantly develops with science and technology constantly progressive, technique ubiquity the problems referred to above that adopt rotary kiln-electrosmelting ferronickel take nickel-bearing laterite as raw material of prior art are badly in need of being resolved, therefore, people urgently wish a kind of nickel-iron smelting furnace flue gas exhaust heat recovery system appearance.
Summary of the invention
technical problem to be solved in the utility model is: the technique ubiquity that adopts rotary kiln-electrosmelting ferronickel take nickel-bearing laterite as raw material that overcomes prior art is delivered to rotary kiln when high-temperature flue gas and is participated in the roasting prereduction process, fume afterheat is not well utilized, it is excessive that the air-introduced machine load appears, operating mode is bad, the not enough generation of system's negative pressure flame emits phenomenon outward, smoke pipe coking situation is serious, the defective of fume afterheat but also contaminated environment had not only been wasted in the direct emptying of high-temperature flue gas especially, a kind of nickel-iron smelting furnace flue gas exhaust heat recovery system is provided, this nickel-iron smelting furnace flue gas exhaust heat recovery system not only can be good at being dissolved into rotary kiln-eaf process nickel-iron smelting large system, effect by middle blower fan has solved the not enough flame that occurs of system's negative pressure and has emitted the problems such as phenomenon outward, and the abundant fume afterheat of effectively having recycled the generation of nickel-iron smelting stove.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of nickel-iron smelting furnace flue gas exhaust heat recovery system, comprise expansion chamber and deduster, this nickel-iron smelting furnace flue gas exhaust heat recovery system also comprises waste heat boiler, gas-distributing cylinder and middle blower fan, expansion chamber is connected with the inlet air of boiler pipe with waste heat boiler, the exhanst gas outlet of waste heat boiler is connected with middle blower fan, and the exhanst gas outlet of middle blower fan is connected with the gas approach of deduster.
Further, described waste heat boiler comprises economizer, evaporimeter, superheater and drum, economizer, evaporimeter and superheater are arranged in described waste heat boiler, drum is arranged on outside described waste heat boiler, boiler feedwater enters the entrance of economizer, the outlet of economizer is connected with the saturation water entrance of drum, the saturation water outlet of drum is connected with the entrance of evaporimeter, the outlet of evaporimeter is connected with the saturated vapor entrance of drum, the saturated vapor outlet of drum is connected with the entrance of superheater, and the outlet of superheater is connected with described gas-distributing cylinder.
Further, this nickel-iron smelting furnace flue gas exhaust heat recovery system also comprises high-temperature three-way valve, and the two ends of high-temperature three-way valve connect respectively the inlet air of boiler pipe.
Further, this nickel-iron smelting furnace flue gas exhaust heat recovery system also comprises cold blast sliding valve, and the two ends of cold blast sliding valve connect respectively the inlet air of boiler pipe.
Further, this nickel-iron smelting furnace flue gas exhaust heat recovery system is provided with the independent short tube that connects the burning air-valve in the side of described expansion chamber, and the inner chamber of independent short tube and the inner chamber of described expansion chamber are communicated with.
Preferably, described waste heat boiler is a kind of upper wind inlet type waste heat boiler.
Preferably, described inlet air of boiler pipe adopts a kind of high-temperature flue gas pipeline abrasionproof insulation construction, i.e. inner abrasionproof and inside and outside all heat insulation insulation constructions.
The beneficial effects of the utility model are: 1, because the utility model also comprises waste heat boiler, gas-distributing cylinder and middle blower fan, expansion chamber is connected with the inlet air of boiler pipe with waste heat boiler, the exhanst gas outlet of waste heat boiler is connected with middle blower fan, the exhanst gas outlet of middle blower fan is connected with the gas approach of deduster, carry out heat exchange from expansion chamber and through the high-temperature flue gas of waste heat boiler and the water (referring to boiler feedwater) of process waste heat boiler, low heat value flue gas after cooling from the exhanst gas outlet of waste heat boiler out, by middle blower fan, go to the deduster of original system; Boiler feedwater enters waste heat boiler and absorbs heat, finally at superheater exit generation superheated steam.Superheated steam is gone to gas-distributing cylinder, by gas-distributing cylinder hot user's steam supply downstream; So, the utility model not only can be good at being dissolved into rotary kiln-eaf process nickel-iron smelting large system, effect by middle blower fan has solved the not enough flame that occurs of system's negative pressure and has emitted the problems such as phenomenon outward, and has fully effectively recycled the fume afterheat that the nickel-iron smelting stove produces.2, the inlet air of boiler pipe in the utility model adopts a kind of high-temperature flue gas pipeline abrasionproof insulation construction, be inner abrasionproof and inside and outside all heat insulation insulation constructions, make the insulation of inlet air of boiler pipe, from expansion chamber and few through the high-temperature flue gas thermal loss of waste heat boiler, the inlet air of boiler pipe is wear-resisting, its long service life.3, the utility model carries out heat recovery to the high-temperature flue gas that the nickel-iron smelting stove produces, and meets the requirement of energy-conserving and environment-protective.4, the utility model is reasonable in design, and is practical, adopting rotary kiln-electrosmelting ferronickel to have promotion and use value widely in the field.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Description of reference numerals in Fig. 1: 1---nickel-iron smelting stove; 2---expansion chamber; 3---rotary kiln; 4---dry kiln; 5---deduster; 6---air-introduced machine; 7---chimney; 8---waste heat boiler; 81---economizer; 82---evaporimeter; 83---superheater; 84---drum; 9---gas-distributing cylinder; 10---middle blower fan; 11---diffuse valve; 12---valve; 13---the burning air-valve; 14---high-temperature three-way valve; 15---cold blast sliding valve; 16---the inlet air of boiler pipe.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail; be not that practical range of the present utility model is confined to this; this embodiment does not limit protection domain of the present utility model; those who are familiar with this art should belong to protection domain of the present utility model in not deviating from the lower rational variation of carrying out of protection domain of the present utility model and spirit.
As shown in Figure 1, adopt the nickel-iron smelting kiln gas handling process of rotary kiln-eaf process as follows: nickel-iron smelting stove 1 produces the high-temperature flue gas that contains 70% left and right CO, this high-temperature flue gas is by diffusing the control of valve 11 and valve 12, or directly emptying, or enter expansion chamber 2 depositing dusts, then successively by rotary kiln 3, dry kiln 4, deduster 5, air-introduced machine 6, drain into atmosphere by chimney 7 at last.The described a kind of nickel-iron smelting furnace flue gas exhaust heat recovery system of the present embodiment, comprise expansion chamber 2 and deduster 5, this nickel-iron smelting furnace flue gas exhaust heat recovery system also comprises waste heat boiler 8, gas-distributing cylinder 9 and middle blower fan 10, expansion chamber 2 is connected with waste heat boiler 8 use inlet air of boiler pipes 16, the exhanst gas outlet of waste heat boiler 8 is connected with middle blower fan 10, and the exhanst gas outlet of middle blower fan 10 is connected with the gas approach of deduster 5.further, described waste heat boiler 8 comprises economizer 81, evaporimeter 82, superheater 83 and drum 84, economizer 81, evaporimeter 82 and superheater 83 are arranged in described waste heat boiler 8, drum 84 is arranged on outside described waste heat boiler 8, boiler feedwater enters the entrance of economizer 81, the outlet of economizer 81 is connected with the saturation water entrance of drum 84, the saturation water outlet of drum 84 is connected with the entrance of evaporimeter 82, the outlet of evaporimeter 82 is connected with the saturated vapor entrance of drum 84, the saturated vapor outlet of drum 84 is connected with the entrance of superheater 83, the outlet of superheater 83 is connected with described gas-distributing cylinder 9.This nickel-iron smelting furnace flue gas exhaust heat recovery system also comprises high-temperature three-way valve 14, and the two ends of high-temperature three-way valve 14 connect respectively inlet air of boiler pipe 16.This nickel-iron smelting furnace flue gas exhaust heat recovery system also comprises cold blast sliding valve 15, and the two ends of cold blast sliding valve 15 connect respectively inlet air of boiler pipe 16.Preferably, be provided with the independent short tube that connects burning air-valve 13 in the side of described expansion chamber 2, the inner chamber of the inner chamber of independent short tube and described expansion chamber 2 is communicated with.Connect burning air-valve 13 at expansion chamber 2 lateral opening holes and by independent short tube, nickel-iron smelting stove 1 produces the high-temperature flue gas that contains 70% left and right CO and enters expansion chamber 2 depositing dusts, simultaneously in this mixed combustion, CO is become divided combustion, improves the gross calorific value of high-temperature flue gas.Preferably, described waste heat boiler 8 is a kind of upper wind inlet type waste heat boilers.High temperature high heating value flue gas from expansion chamber 2 is out controlled by high-temperature three-way valve 14, goes to waste heat boiler 8 heat releases coolings, and the low heat value flue gas after cooling from the exhanst gas outlet of waste heat boiler 8 out by middle blower fan 10, is gone to the deduster 5 of original system.When needing off-the-line, control by high-temperature three-way valve 14 because of maintenance or other reasons when nickel-iron smelting furnace flue gas exhaust heat recovery system, expansion chamber 2 flue gas out is sent to rotary kiln 3 walks original system.Boiler feedwater enters waste heat boiler 8 and absorbs heat, finally at superheater 83 exits generation superheated steams.Superheated steam is gone to gas-distributing cylinder 9, by gas-distributing cylinder 9 hot user's steam supply downstream.Reach the purpose that high-temperature flue gas that the nickel-iron smelting stove is produced carries out heat recovery.This nickel-iron smelting furnace flue gas exhaust heat recovery system is reasonable in design, practical, is adopting rotary kiln-electrosmelting ferronickel to have promotion and use value widely in the field.
The above is only a preferred embodiment of the present utility model, therefore all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, all is included in the protection domain of the utility model patent application.
Claims (6)
1. nickel-iron smelting furnace flue gas exhaust heat recovery system, comprise expansion chamber (2) and deduster (5), it is characterized in that: also comprise waste heat boiler (8), gas-distributing cylinder (9) and middle blower fan (10), expansion chamber (2) is connected with inlet air of boiler pipe (16) with waste heat boiler (8), the exhanst gas outlet of waste heat boiler (8) is connected with middle blower fan (10), and the exhanst gas outlet of middle blower fan (10) is connected with the gas approach of deduster (5).
2. a kind of nickel-iron smelting furnace flue gas exhaust heat recovery system according to claim 1, it is characterized in that: described waste heat boiler (8) comprises economizer (81), evaporimeter (82), superheater (83) and drum (84), economizer (81), evaporimeter (82) and superheater (83) are arranged in described waste heat boiler (8), drum (84) is arranged on outside described waste heat boiler (8), boiler feedwater enters the entrance of economizer (81), the outlet of economizer (81) is connected with the saturation water entrance of drum (84), the saturation water outlet of drum (84) is connected with the entrance of evaporimeter (82), the outlet of evaporimeter (82) is connected with the saturated vapor entrance of drum (84), the saturated vapor outlet of drum (84) is connected with the entrance of superheater (83), the outlet of superheater (83) is connected with described gas-distributing cylinder (9).
3. a kind of nickel-iron smelting furnace flue gas exhaust heat recovery system according to claim 1, it is characterized in that: also comprise high-temperature three-way valve (14), the two ends of high-temperature three-way valve (14) connect respectively inlet air of boiler pipe (16).
4. a kind of nickel-iron smelting furnace flue gas exhaust heat recovery system according to claim 1, it is characterized in that: also comprise cold blast sliding valve (15), the two ends of cold blast sliding valve (15) connect respectively inlet air of boiler pipe (16).
5. a kind of nickel-iron smelting furnace flue gas exhaust heat recovery system according to claim 1, it is characterized in that: be provided with the independent short tube that connects burning air-valve (13) in the side of described expansion chamber (2), the inner chamber of the inner chamber of independent short tube and described expansion chamber (2) is communicated with.
6. a kind of nickel-iron smelting furnace flue gas exhaust heat recovery system according to claim 1, it is characterized in that: described waste heat boiler (8) is a kind of upper wind inlet type waste heat boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206261139U CN202993867U (en) | 2012-11-23 | 2012-11-23 | Recovery system of flue gas waste heat of ferro-nickel smelting furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012206261139U CN202993867U (en) | 2012-11-23 | 2012-11-23 | Recovery system of flue gas waste heat of ferro-nickel smelting furnace |
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| CN202993867U true CN202993867U (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012206261139U Expired - Fee Related CN202993867U (en) | 2012-11-23 | 2012-11-23 | Recovery system of flue gas waste heat of ferro-nickel smelting furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108624733A (en) * | 2018-06-18 | 2018-10-09 | 华林特钢集团有限公司 | A kind of steel ingot refinement waste heat recovery device |
| CN108826962A (en) * | 2018-07-31 | 2018-11-16 | 广西锰华新能源科技发展有限公司 | All-metal structure restores fast-assembling metallurgical equipment |
-
2012
- 2012-11-23 CN CN2012206261139U patent/CN202993867U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108624733A (en) * | 2018-06-18 | 2018-10-09 | 华林特钢集团有限公司 | A kind of steel ingot refinement waste heat recovery device |
| CN108624733B (en) * | 2018-06-18 | 2023-10-27 | 华林特钢集团有限公司 | Steel ingot refining waste heat recycling device |
| CN108826962A (en) * | 2018-07-31 | 2018-11-16 | 广西锰华新能源科技发展有限公司 | All-metal structure restores fast-assembling metallurgical equipment |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20191123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |