CN201589534U - Sintering machine head flue gas afterheat recycling device - Google Patents

Sintering machine head flue gas afterheat recycling device Download PDF

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Publication number
CN201589534U
CN201589534U CN2009202084788U CN200920208478U CN201589534U CN 201589534 U CN201589534 U CN 201589534U CN 2009202084788 U CN2009202084788 U CN 2009202084788U CN 200920208478 U CN200920208478 U CN 200920208478U CN 201589534 U CN201589534 U CN 201589534U
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CN
China
Prior art keywords
flue gas
main exhaust
sintering machine
sulfur
sulfur main
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Application number
CN2009202084788U
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Chinese (zh)
Inventor
孙承波
李倩婧
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上海西重所重型机械成套有限公司
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Priority to CN2009202084788U priority Critical patent/CN201589534U/en
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Publication of CN201589534U publication Critical patent/CN201589534U/en

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    • Y02P80/152

Abstract

The utility model relates to a sintering machine head flue gas afterheat recycling device, which comprises a sintering machine. Pluralities of gas collecting pipes are disposed on a lateral wall of the sintering machine, gas collecting pipes disposed at two ends of the sintering machine are connected with a low sulfur main exhaust pipe, a gas collecting pipe disposed in the middle of the sintering machine is connected with a high sulfur main exhaust pipe, one end of the low sulfur main exhaust pipe is sealed while the other end is connected with a chimney through a first cold air valve, a first electrostatic precipitator and a first induced draft fan sequentially, one end of the high sulfur main exhaust pipe is sealed while the other end is connected with the chimney through a second cold air valve, a second electrostatic precipitator, a second fan and a wet desulphurization device sequentially, and the high sulfur main exhaust pipe is connected with the second electrostatic precipitator through a pre-dedusting device, an afterheat recovery device and a third induced draft fan sequentially. The sintering machine head flue gas afterheat recycling device can realize flue gas afterheat recovery and utilization of a sintering machine head, can sufficiently utilize low temperature flue gas after afterheat recycling, and prevents flue gas after being desulfurized from corroding flues and chimneys.

Description

Sintering device handpiece flue gas waste heat recovery use device

Technical field

The utility model relates to a kind of sintering device handpiece flue gas waste heat recovery use device.

Background technology

So-called sintering is meant various powdery iron-containing raw materials and suitable fuel, flux are mixed, and is placed on the technological process that high temperature heats on the agglomerating plant.In the heated process of mixture, fuel in the mixture can produce a large amount of heats, impels mixture generation series of physical chemical change, and partially mixed material particle surface takes place softening or fusing, produce the liquid phase of some molten conditions, and wetting other unfused ore particles.After the mixture cooling, liquid phase is bonded to bulk with mineral powder granular, and this process is called sintering, and the nugget of gained is in sintering deposit.

The sintering machine of each sintering plant use nearly all is the continuous pallettype sintering machine from downdraft at present.The source exhaust gas that continuous pallettype sintering machine produces mainly contains:

(1) during sintering, the high-temp waste gas that contains dust, flue dust, sulfur oxide, nitrogen oxide from sintering machine downdraft case is discharged is commonly referred to head waste gas to compound on sintering machine;

(2) dust-laden exhaust gas with uniform temperature that sintering deposit produces in unloading ore deposit, fragmentation, screening, cooling, storage and transport process is commonly referred to tail waste gas;

(3) various raw materials for sintering are unloading, are processing generation normal temperature dust-laden exhaust gas in processing, the transporting procedures, and the steam with uniform temperature-dust symbiosis that produces in the compound device.

Produce the various raw materials (Iron Ore Powder, fuel, flux) that use and all contain sulphur content, in sintering process, the burned generation of the most sulphur SO in the material 2, the sinter fume amount that produces in the sintering process is concentrated SO in the flue gas greatly 2Content very high.

The sintering machine head end flue gas device is made up of wind chamber, main exhaust, head electric cleaner, main exhauster and chimney.The flue gas that produces in the sintering process enters high-sulfur main exhaust and low-sulfur main exhaust respectively according to the height of its sulfur content.

Wet desulphurization method commonly used is handled the flue gas that is rich in sulfur oxide in the prior art, and in the flue gas after wet desulphurization is handled, content of sulfur dioxide significantly reduces, but still have a certain amount of nitrogen oxide in the flue gas, the media such as fluorine ion of oxysulfide and trace.Above-mentioned medium because of smoke moisture increases, temperature reduces, can produce the result of strong corrosion in wet desulfurizing process.Flue gas very easily condenses into dew at inner wall of stack in the time of 40 ℃-80 ℃, after the residual medium dissolves in the flue gas after desulfurization, just formed that corrosivity is big, permeability is strong and the awkward diluted acid solution of taking precautions against, in the flue gas after the remaining sulfur trioxide dissolving, the dilution heat of sulfuric acid that the corrosivity that can form is very strong.

Higher (800~1000 ℃ of the flue-gas temperature that the bottom wind chamber is discharged during the raw material sintering; higher sometimes); in order to protect cleaner; high-temperature flue gas through blast pipe gather enter the head electric cleaner before; need with the cold wind hybrid cooling, its mixed flue gas mean temperature is lower, about about 200 ℃; temperature changes with the technological operation situation, and flue-gas temperature is generally at 100 ~ 200 ℃.High-temperature flue gas is discharged, and also means the serious waste of heat.

The utility model content

The purpose of this utility model provides a kind of sintering device handpiece flue gas waste heat recovery use device, and it is too high effectively to solve in the prior art sulfur-bearing in the sintering device handpiece flue gas, nitrogen, fluorine, easily condenses into problems such as strong acid etching apparatus behind the flue gas cool-down.The utility model relates to a kind of sintering device handpiece flue gas waste heat recovery use device, comprise sintering machine, the sidewall of described sintering machine is provided with several discharges, be arranged on sintering machine head end, the discharge at tail two ends is connected with the low-sulfur main exhaust, being arranged on the middle discharge of sintering machine is connected with the high-sulfur main exhaust, the one end sealing of low-sulfur main exhaust, the other end is successively by first cold blast sliding valve, first electric cleaner, first air-introduced machine is connected with chimney, the one end sealing of high-sulfur main exhaust, the other end is successively by second cold blast sliding valve, second electric cleaner, second blower fan, wet desulphurization device is connected with chimney, the high-sulfur main exhaust passes through pre-dedusting device successively, waste-heat recovery device, the 3rd air-introduced machine is connected with second electric cleaner, described the 3rd air-introduced machine is connected with second cold blast sliding valve, be provided with pipeline between the described high-sulfur main exhaust and second cold blast sliding valve, described pipeline is provided with valve, be provided with pipeline between described high-sulfur main exhaust and the pre-dedusting device, described pipeline is provided with valve.The utility model provides a kind of sintering device handpiece flue gas waste heat recovery use device, can realize sinter fume waste heat recovery and utilization, improved the smoke stack emission flue-gas temperature, effectively utilize the sintering machine head end fume afterheat more than 50%, reach purpose of energy saving, can make full use of the low-temperature flue gas behind the residual heat recovery again, prevent that flue gas after the desulfurization is to the corrosion of flue, chimney.

Description of drawings

Accompanying drawing 1 is a structural representation of the present utility model.

The specific embodiment

Comprise sintering machine 1 among the figure, the sidewall of described sintering machine is provided with several discharges 2, the discharge that is arranged on the sintering machine two ends is connected with low-sulfur main exhaust 3, being arranged on the middle discharge of sintering machine is connected with high-sulfur main exhaust 4, the one end sealing of low-sulfur main exhaust 3, the other end is successively by first cold blast sliding valve 5, first electric cleaner 6, first air-introduced machine 7 is connected with chimney 8, the one end sealing of high-sulfur main exhaust 4, the other end is successively by second cold blast sliding valve 9, second electric cleaner 10, second blower fan 11, wet desulphurization device 12 is connected with chimney 8, high-sulfur main exhaust 4 is successively by pre-dedusting device 13, waste-heat recovery device 14, the 3rd air-introduced machine 15 is connected with second electric cleaner 10, described the 3rd air-introduced machine 15 is connected with second cold blast sliding valve 9, be provided with pipeline 17 between the described high-sulfur main exhaust 4 and second cold blast sliding valve 9, described pipeline is provided with valve 16, be provided with pipeline 19 between described high-sulfur main exhaust 4 and the pre-dedusting device 13, described pipeline is provided with valve 18.

Described wet desulphurization device is a kind of sulfur removal technology device commonly used, and wet method comprises lime lime-gypsum method, magnesium oxide method, two alkaline process, seawater method etc., and the low-sulfur main exhaust does not enter wet desulphurization device.

Described waste-heat recovery device is by heat exchange pattern, with high-temperature flue gas water at low temperature is heated, and temperature descended after high-temperature flue gas was finished heat exchange by waste-heat recovery device, and the temperature rising generated water vapour after water at low temperature was finished heat exchange by waste-heat recovery device.Its specific implementation form can be a waste heat boiler, also can be devaporizer, or the like.Water vapour can be used for generating, uses by oneself or incorporates steam pipe system into, and the low-temperature flue gas of discharging from waste-heat recovery device is divided into two-way after entering the electric cleaner dedusting, most flue gas carries out desulfurization subsequently, the flue gas of small part then with desulfurization after clean flue gas mix intensification, the flue gas after the heating is discharged by chimney.

The flue gas that sintering machine produces is being divided into two-way under the effect of three air-introduced machines: first via flue gas (low-sulfur sinter fume) by coming out in the low-sulfur main exhaust, enters first electric cleaner subsequently after first cold blast sliding valve is regulated the cigarette temperature under the effect of second air-introduced machine; The second road flue gas (the high-sulfur flue gas in the high-sulfur main exhaust) is under the swabbing action of first air-introduced machine, behind pre-dedusting device, enter waste-heat recovery device, in waste-heat recovery device, produce high-quality steam, can be used for generating, use by oneself or incorporate steam pipe system into through heat exchange; The low-temperature flue gas of discharging in the waste-heat recovery device then enters dedusting in second electric cleaner, flue gas after the dedusting is divided into two-way once more, one tunnel method desulfurizer desulfurization of drying, flue gas after the desulfurization with without behind the mixed heat transfer in the flue gas of wet desulphurization and the flue of low-sulfur sinter fume before chimney, go out by smoke stack emission.In dust removal process, when waste-heat recovery device low-temperature flue gas temperature drift that fluctuation causes discharging occurred and is unfavorable for electric cleaner work, low-temperature flue gas was bypassed to the cooling of second cold blast sliding valve, carries out dust removal process by second electric cleaner again.

Be provided with pipeline 17 between the described high-sulfur main exhaust 4 and second cold blast sliding valve 9, described pipeline is provided with valve 16, is provided with pipeline 19 between described high-sulfur main exhaust 4 and the pre-dedusting device 13, and described pipeline is provided with valve 18.Valve 16 between the described high-sulfur main exhaust 4 and second cold blast sliding valve 9 often closes, and the valve 18 between described high-sulfur main exhaust 4 and the pre-dedusting device 13 is often opened.When waste-heat recovery device occurs closing the valve 18 between high-sulfur main exhaust 4 and the pre-dedusting device 13 when unusual, open the valve 16 between the high-sulfur main exhaust 4 and second cold blast sliding valve 9 simultaneously.

Claims (1)

1. sintering device handpiece flue gas waste heat recovery use device, comprise sintering machine, it is characterized in that: the sidewall of described sintering machine is provided with several discharges, be arranged on sintering machine head end, the discharge at tail two ends is connected with the low-sulfur main exhaust, being arranged on the middle discharge of sintering machine is connected with the high-sulfur main exhaust, the one end sealing of low-sulfur main exhaust, the other end is successively by first cold blast sliding valve, first electric cleaner, first air-introduced machine is connected with chimney, the one end sealing of high-sulfur main exhaust, the other end is successively by second cold blast sliding valve, second electric cleaner, second blower fan, wet desulphurization device is connected with chimney, the high-sulfur main exhaust passes through pre-dedusting device successively, waste-heat recovery device, the 3rd air-introduced machine is connected with second electric cleaner, described the 3rd air-introduced machine is connected with second cold blast sliding valve, be provided with pipeline between the described high-sulfur main exhaust and second cold blast sliding valve, described pipeline is provided with valve, be provided with pipeline between described high-sulfur main exhaust and the pre-dedusting device, described pipeline is provided with valve.
CN2009202084788U 2009-08-26 2009-08-26 Sintering machine head flue gas afterheat recycling device CN201589534U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102003886A (en) * 2010-11-05 2011-04-06 浙江菲达脱硫工程有限公司 Sintering machine flue gas separation conduction type desulfurizing device and method
CN102278735A (en) * 2011-07-01 2011-12-14 江苏中天能源设备有限公司 Heat pipe exhaust-heat boiler internally built on big and small flues of sintering machine
CN103521047A (en) * 2013-10-25 2014-01-22 中冶长天国际工程有限责任公司 Method for improving sintering desulfurization flue gas emission temperature and system thereof
CN105318734A (en) * 2015-03-21 2016-02-10 李正福 Device and method for applying and purifying waste heat of low-temperature waste gas of large sintering flue
CN105841499A (en) * 2014-11-28 2016-08-10 中国钢铁股份有限公司 Exhaust air treating system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102003886A (en) * 2010-11-05 2011-04-06 浙江菲达脱硫工程有限公司 Sintering machine flue gas separation conduction type desulfurizing device and method
CN102278735A (en) * 2011-07-01 2011-12-14 江苏中天能源设备有限公司 Heat pipe exhaust-heat boiler internally built on big and small flues of sintering machine
CN103521047A (en) * 2013-10-25 2014-01-22 中冶长天国际工程有限责任公司 Method for improving sintering desulfurization flue gas emission temperature and system thereof
CN105841499A (en) * 2014-11-28 2016-08-10 中国钢铁股份有限公司 Exhaust air treating system
CN105318734A (en) * 2015-03-21 2016-02-10 李正福 Device and method for applying and purifying waste heat of low-temperature waste gas of large sintering flue

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Granted publication date: 20100922

Termination date: 20150826

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