CN206056314U - A kind of blood circulation for improving flash furnace west heat boiler operating rate - Google Patents

A kind of blood circulation for improving flash furnace west heat boiler operating rate Download PDF

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Publication number
CN206056314U
CN206056314U CN201621076711.8U CN201621076711U CN206056314U CN 206056314 U CN206056314 U CN 206056314U CN 201621076711 U CN201621076711 U CN 201621076711U CN 206056314 U CN206056314 U CN 206056314U
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heat boiler
blood circulation
operating rate
pipeline
flash
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CN201621076711.8U
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黄小兵
邱江波
夏明�
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TIANJIN FLASH IRONMAKING TECHNOLOGY Co Ltd
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TIANJIN FLASH IRONMAKING TECHNOLOGY Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

This utility model provides a kind of blood circulation for improving flash furnace west heat boiler operating rate, including the Flash Smelting Furnace, converging three-way valve, hot precipitator, waste heat boiler, dedusting component, air exhauster, flow-control equipment and the compressor that are sequentially communicated by exhaust pipe;The converging three-way valve is provided with entrance I, entrance II and outlet III, and the entrance I is connected by pipeline with flash furnace off-gas outlet, and the entrance II is connected by pipeline with the compressor exhanst gas outlet;The outlet III is connected by pipeline with the hot precipitator smoke inlet;The flow-control equipment is provided with an air inlet and multiple gas outlets, and the air inlet is connected by pipeline with the air exhauster exhanst gas outlet, and one of gas outlet is connected with the smoke inlet of the compressor.A kind of blood circulation for improving flash furnace west heat boiler operating rate described in the utility model, can be greatly reduced the fault rate of flash smelting furnace waste heat boiler, reduce the maintenance frequency.

Description

A kind of blood circulation for improving flash furnace west heat boiler operating rate
Technical field
This utility model belongs to flash furnace west heat boiler technical field, improves flash furnace west heat boiler more particularly, to a kind of The blood circulation of operating rate.
Background technology
Flash furnace west heat boiler is the important heat power equipment in flash smelting technique, is had in meltshop technological process Irreplaceable effect, its Main Function are to produce steam using high-temperature flue gas, and the flue gas that flash smelting is produced is carried out Cooling and rough dusting.Flash furnace west heat boiler is typically directly connected with the uptake flue of Flash Smelting Furnace, and flash furnace off-gas are passed through Uptake flue outlet enters waste heat boiler, and Jing waste heat boiler temperature is down to less than 400 DEG C, and entering back into dust arrester carries out dedusting.
Up to 1200-1500 DEG C of Flash Smelting Furnace exit gas temperature, and carry a large amount of melting flue dust secretly, dust rate is 6%~ 10%.After flue gas enters waste heat boiler, as dustiness is big, the quick flowing of flue gas can cause the abrasion of heating surface, thus Periodic inspection is needed, while can also affect the service life of waste heat boiler;Simultaneously as flue-gas temperature is high, the gold that flue dust contains Category and ash are in molten condition, can be bonded on furnace wall, cause boiler caking serious, it has to periodically blowing out cleaning, and remaining Once heat boiler shutdown maintenance, whole flash smelting system are actually also at standstill state, the normal of production has been had a strong impact on Carry out.
The content of the invention
In view of this, this utility model is directed to a kind of blood circulation for improving flash furnace west heat boiler operating rate, with Solve the problems, such as that current flash furnace west heat boiler repair rate height, upkeep operation amount are big.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in:
A kind of blood circulation for improving flash furnace west heat boiler operating rate, including the flash being sequentially communicated by exhaust pipe Stove, converging three-way valve, hot precipitator, waste heat boiler, dedusting component, air exhauster, flow-control equipment and compressor;The conjunction Stream three-way valve is provided with entrance I, entrance II and outlet III, and the entrance I is connected by pipeline with flash furnace off-gas outlet, The entrance II is connected by pipeline with the compressor exhanst gas outlet;The outlet III is entered with the hot precipitator flue gas Mouth is connected by pipeline;The flow-control equipment is provided with an air inlet and multiple gas outlets, the air inlet with it is described Air exhauster exhanst gas outlet is connected by pipeline, and one of gas outlet is connected with the smoke inlet of the compressor.Flue gas Into after flow-control equipment, converging three-way valve is entered after being partly into compressor boost and is mixed with the original high-temperature flue gas of Flash Smelting Furnace Close, mixed flue-gas temperature can be made to be down to less than 1000 DEG C, preferably between 800-950 DEG C, during this, mixed flue gas Temperature can by control cold flue gas back amount be adjusted.Too low can the increase of mixed flue gas temperature returns the defeated of cold flue gas The amount of sending, increased the energy consumption of compressor, and temperature is too high, increase can the probability of the flue dust melting in flue gas, while may surpass Go out or be close to the temperature resistant range of high-temperature dust removal equipment work, increased the fault rate of equipment.
Cold flue gas after dedusting are come out of the stove in addition to end except return flash furnace off-gas, and another part imports follow-up fume treatment operation: Sulfur content in coal is such as fired, is caused sulfureous in flue gas content to exceed discharge standard, then can be introduced follow-up desulfurization process;If sulfur-bearing in raw material Height, also flue gas is introduced acid making system by recyclable sulfur therein;If not pollutant such as sulfur-containing oxide, nitrogen oxides in flue gas, Meet environment protection standard conditions of discharge, then directly can discharge.
Further, the dedusting component is that multistage dedusting is equipped or single cleaner.
Further, the dedusting component is one in heavy dirt room, electrostatic precipitator, sack cleaner, cyclone dust extractor Or it is multiple.
Further, the dedusting component is some heavy dirt rooms and electrostatic precipitator.
Further, the hot precipitator is cyclone separator or hot cyclone dust extractor.
Further, the hot precipitator is hot cyclone dust extractor.
Further, the outlet III of the converging three-way valve is connected with the exhaust-heat boiler inlet by pipeline.Allow flash The high-temperature flue gas that fire grate is put are directly entered waste heat boiler after mixing with the cold flue gas returned Jing after cooling dedusting, also in a degree On protective effect is served to waste heat boiler because the flue-gas temperature that returns is relatively low and dust content is extremely low Jing after cooling dedusting, with After high-temperature flue gas mixing, the average dust content of flue gas greatly declines, while temperature is also down to less than 1000 DEG C, less than in flue dust The fusing point of most ash and metal, it is to avoid the flue dust of melting is bonded on waste heat boiler furnace wall;Although reducing high temperature to remove The operation of dirt, but also preferable effect can be played to the long-term stable operation for ensureing waste heat boiler, while also reducing system Equipment investment.
Further, the flow-control equipment is provided with an air inlet and two gas outlets.
Relative to prior art, this utility model it is a kind of improve flash furnace west heat boiler operating rate blood circulation with Lower advantage:
A kind of blood circulation for improving flash furnace west heat boiler operating rate described in the utility model, using by after dedusting Cold flue gas are recycled back into the mode mixed with the high-temperature flue gas of Flash Smelting Furnace discharge, on the one hand can reduce the dust-laden of mixed flue gas Rate, on the other hand makes the temperature of mixed flue gas be down to less than 1000 DEG C, the use temperature range of the cleaner unit that reaches a high temperature, Jing high temperature Flue gas can be further reduced after dedusting into the dust content of waste heat boiler;Additionally, less than 1000 DEG C of flue-gas temperature after mixing Solidify wherein most flue dust, it is to avoid melting bonding of the flue dust on waste heat boiler furnace wall.To sum up, by this utility model A kind of blood circulation of described raising flash furnace west heat boiler operating rate, it is possible to decrease into exhaust-heat boiler flue gas temperature and contain Dirt rate, it is to avoid the flue dust of melting is bonded on waste heat boiler furnace wall, so as to reduce maintenance and the blowing out frequency of waste heat boiler, improves The operating rate of whole Flash Smelting Furnace smelting system.
Description of the drawings
The accompanying drawing for constituting a part of the present utility model is used for providing further understanding to of the present utility model, and this practicality is new The schematic description and description of type is used to explain this utility model, does not constitute to improper restriction of the present utility model. In accompanying drawing:
Fig. 1 is a kind of blood circulation letter of the raising flash furnace west heat boiler operating rate described in this utility model embodiment 1 Single schematic diagram;
Fig. 2 is a kind of blood circulation letter of the raising flash furnace west heat boiler operating rate described in this utility model embodiment 2 Single schematic diagram.
Description of reference numerals:
1- Flash Smelting Furnaces;2- hot precipitators;3- waste heat boilers;4- dedusting components;5- air exhausters;6- flow-control equipments; 7- compressors;8- converging three-way valves.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in this utility model can To be mutually combined.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace Dress ", " being connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly Connection;Can be mechanically connected, or electrically connect;Can be joined directly together, it is also possible to be indirectly connected to by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, can be by concrete condition understanding State concrete meaning of the term in this utility model.
Below with reference to the accompanying drawings and in conjunction with the embodiments describing this utility model in detail.
Embodiment 1
As shown in figure 1, it is a kind of improve flash furnace west heat boiler operating rate blood circulation, including by exhaust pipe successively The Flash Smelting Furnace 1 of connection, converging three-way valve 8, hot precipitator 2, waste heat boiler 3, dedusting component 4, air exhauster 5, flow-control set For 6 and compressor 7;The converging three-way valve 8 is provided with entrance I, entrance II and outlet III, the entrance I and 1 cigarette of the Flash Smelting Furnace Gas outlet is connected by pipeline, and the entrance II is connected by pipeline with 7 exhanst gas outlet of the compressor;The outlet III It is connected by pipeline with 2 smoke inlet of the hot precipitator;The flow-control equipment 6 is provided with an air inlet and two Gas outlet, the air inlet are connected by pipeline with 5 exhanst gas outlet of the air exhauster, one of gas outlet and the compression The smoke inlet of machine 7 is connected.
The course of work of the present embodiment is:
During work, from the high-temperature flue gas out of the Flash Smelting Furnace 1 after described in, converging three-way valve 8 is mixed with cold flue gas, then Hot precipitator 2 described in Jing introduces the waste heat boiler 3 and absorbs sensible heat therein, is greatly reduced flue-gas temperature;Then flue gas Chalk dust removing, then air exhauster 5 described in Jing is further gone to introduce the flow-control equipment 6 and shunted into the dedusting component 4, Part of smoke after shunting is pressurized into the compressor 7, and another part flue gas imports follow-up fume treatment operation;It is pressurized it Afterwards the converging three-way valve 8 described in the Jing of end of coming out of the stove that flue gas Jing pipelines return 1 flue gas of Flash Smelting Furnace is mixed with flash high-temperature flue gas, Enter back into the hot precipitator 2 and remove bulky grain flue dust, then mixed flue gas carry out rough dusting drop into waste heat boiler 3 Temperature, is repeated in above-mentioned operation.
The present embodiment is used for into the smelting of copper, its method is:
It is that (dustiness is 171.5g/Nm to 1330 DEG C of flue gases by copper flash smelting stove tapping temperature3) ECDC stream three-way valve 8 with (320 DEG C of temperature, dustiness is 0.3g/Nm to cold flue gas3) after mixing, flue-gas temperature is reduced to 920 DEG C, and dustiness is 122.06g/ Nm3, Jing after hot precipitator 2, the dustiness of flue gas is reduced to 23.19g/Nm3, flue gas be re-introduced into waste heat boiler 3 absorb its sensible heat, Make temperature be down to 360 DEG C, then introduce 3 heavy dirt rooms and electrostatic precipitator successively, electrostatic precipitator exiting flue gas dustiness is reduced to 0.3g/Nm3;The flue gas for removing most dust is introduced into air exhauster 5, Jing air exhausters 5 import flow-control equipment 6 and carry out point Stream;Then 40.6% (volume fraction) flue gas shunted Jing flow-control equipment 6 is introduced after compressor 7 is pressurized and returns Flash Smelting Furnace The end of coming out of the stove of 1 flue gas, is mixed with flash high-temperature flue gas by converging three-way valve 8, realizes the circulation profit of the cold flue gas of low dustiness With.
Run 2 years by the present embodiment, flash waste heat boiler maintenance number of times is 1 time, compares conventional flash waste heat boiler 1 year Maintenance number of times 2 times, maintenance rate is greatly lowered.
The present embodiment is used for into the smelting of lateritic nickel ore, its method is:
It is that (dustiness is 192.6g/Nm to 1440 DEG C of flue gases by lateritic nickel ore flash smelting furnace tapping temperature3) ECDC stream three (150 DEG C of temperature, dustiness is 0.35g/Nm to port valve 8 with cold flue gas3) after mixing, flue-gas temperature is reduced to 900 DEG C, and dustiness is 110.2g/Nm3, Jing after hot precipitator 2, the dustiness of flue gas is reduced to 19.84g/Nm3, flue gas is re-introduced into waste heat boiler 3 and absorbs Its sensible heat, makes temperature be down to 180 DEG C, then introduces 2 heavy dirt rooms and electrostatic precipitator, electrostatic precipitator exiting flue gas dust-laden successively Amount is reduced to 0.35g/Nm3;The flue gas for removing most dust is introduced into air exhauster 5, Jing air exhausters 5 import flow-control equipment 6 are shunted;Then return after be pressurized to 75% (volume fraction) flue gas shunted Jing flow-control equipment 6 introducing compressor 7 The end of coming out of the stove of 1 flue gas of Flash Smelting Furnace is gone back to, is mixed with Flash Smelting Furnace high-temperature flue gas by converging three-way valve 8, is realized the cold smoke of low dustiness Gas is recycled.
Run 1 year by the present embodiment, copper flash smelting stove waste heat boiler maintenance number of times is 1 time, compares conventional copper flash and melts The maintenance of furnace waste heat boiler 1 year number of times 2 times, maintenance rate is greatly lowered.
Embodiment 2
As shown in Fig. 2 it is a kind of improve flash furnace west heat boiler operating rate blood circulation, including by exhaust pipe successively The Flash Smelting Furnace 1 of connection, converging three-way valve 8, waste heat boiler 3, dedusting component 4, air exhauster 5, flow-control equipment 6 and compressor 7; The converging three-way valve 8 is provided with entrance I, entrance II and outlet III, and the entrance I is connected with 1 exhanst gas outlet of the Flash Smelting Furnace, The entrance II is exported with the compressor 7 and is connected by pipeline;The outlet III is with 3 entrance of the waste heat boiler by pipe Road is connected;The flow-control equipment 6 is provided with an air inlet and two gas outlets, the air inlet and the air exhauster 5 Exhanst gas outlet is connected by pipeline, and one of gas outlet is connected by pipeline with the air inlet of the compressor 7.
The course of work of the present embodiment is:
During work, from the high-temperature flue gas out of the Flash Smelting Furnace 1 after described in, converging three-way valve 8 is mixed with cold flue gas, by Pipeline introduces the waste heat boiler 3 and absorbs sensible heat therein, is greatly reduced flue-gas temperature;Then flue gas enters the dedusting group Part 4 further goes chalk dust removing, then air exhauster 5 described in Jing to introduce the flow-control equipment 6 and shunted, the part after shunting Flue gas is pressurized into the compressor 7, and another part flue gas imports follow-up fume treatment operation;By flue gas Jing pipelines after supercharging The converging three-way valve 8 described in the Jing of end of coming out of the stove for returning 1 flue gas of the Flash Smelting Furnace is mixed with flash high-temperature flue gas, enters back into the waste heat Boiler 3, is repeated in above-mentioned operation.
Preferred embodiment of the present utility model is the foregoing is only, it is not to limit this utility model, all at this Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in this utility model Protection domain within.

Claims (8)

1. it is a kind of improve flash furnace west heat boiler operating rate blood circulation, it is characterised in that:Including by exhaust pipe successively The Flash Smelting Furnace (1) of connection, converging three-way valve (8), hot precipitator (2), waste heat boiler (3), dedusting component (4), air exhauster (5), flow-control equipment (6) and compressor (7);The converging three-way valve (8) is provided with entrance I, entrance II and outlet III, described Entrance I is connected by pipeline with the Flash Smelting Furnace (1) exhanst gas outlet, the entrance II and the compressor (7) exhanst gas outlet It is connected by pipeline;The outlet III is connected by pipeline with the hot precipitator (2) smoke inlet;The flow control Control equipment (6) is provided with an air inlet and multiple gas outlets, and the air inlet passes through pipeline with the air exhauster (5) exhanst gas outlet It is connected, one of gas outlet is connected with the smoke inlet of the compressor (7).
2. it is according to claim 1 it is a kind of improve flash furnace west heat boiler operating rate blood circulation, it is characterised in that:Institute State dedusting component (4) and equip for multistage dedusting or single cleaner.
3. a kind of blood circulation for improving flash furnace west heat boiler operating rate according to claim 1 and 2, its feature exists In:The dedusting component (4) in heavy dirt room, electrostatic precipitator, sack cleaner, cyclone dust extractor one or more.
4. it is according to claim 3 it is a kind of improve flash furnace west heat boiler operating rate blood circulation, it is characterised in that:Institute Dedusting component (4) is stated for some heavy dirt rooms and electrostatic precipitator.
5. it is according to claim 1 it is a kind of improve flash furnace west heat boiler operating rate blood circulation, it is characterised in that:Institute Hot precipitator (2) is stated for cyclone separator or hot cyclone dust extractor.
6. a kind of blood circulation for improving flash furnace west heat boiler operating rate according to claim 1 or 5, its feature exists In:The hot precipitator (2) is hot cyclone dust extractor.
7. it is according to claim 1 it is a kind of improve flash furnace west heat boiler operating rate blood circulation, it is characterised in that:Institute The outlet III for stating converging three-way valve (8) is connected with the exhaust-heat boiler inlet by pipeline.
8. it is according to claim 1 it is a kind of improve flash furnace west heat boiler operating rate blood circulation, it is characterised in that:Institute State flow-control equipment (6) and be provided with an air inlet and two gas outlets.
CN201621076711.8U 2016-09-23 2016-09-23 A kind of blood circulation for improving flash furnace west heat boiler operating rate Active CN206056314U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106969640A (en) * 2017-04-21 2017-07-21 中国船舶重工集团公司第七O三研究所无锡分部 Mineral hot furnace waste heat recovery recirculating system and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106969640A (en) * 2017-04-21 2017-07-21 中国船舶重工集团公司第七O三研究所无锡分部 Mineral hot furnace waste heat recovery recirculating system and method

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